types.go

/*
Copyright 2014 The Kubernetes Authors All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package api

import (
	"k8s.io/kubernetes/pkg/api/resource"
	"k8s.io/kubernetes/pkg/api/unversioned"
	"k8s.io/kubernetes/pkg/fields"
	"k8s.io/kubernetes/pkg/labels"
	"k8s.io/kubernetes/pkg/runtime"
	"k8s.io/kubernetes/pkg/types"
	"k8s.io/kubernetes/pkg/util/intstr"
)

// Common string formats
// ---------------------
// Many fields in this API have formatting requirements.  The commonly used
// formats are defined here.
//
// C_IDENTIFIER:  This is a string that conforms to the definition of an "identifier"
//     in the C language.  This is captured by the following regex:
//         [A-Za-z_][A-Za-z0-9_]*
//     This defines the format, but not the length restriction, which should be
//     specified at the definition of any field of this type.
//
// DNS_LABEL:  This is a string, no more than 63 characters long, that conforms
//     to the definition of a "label" in RFCs 1035 and 1123.  This is captured
//     by the following regex:
//         [a-z0-9]([-a-z0-9]*[a-z0-9])?
//
// DNS_SUBDOMAIN:  This is a string, no more than 253 characters long, that conforms
//      to the definition of a "subdomain" in RFCs 1035 and 1123.  This is captured
//      by the following regex:
//         [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*
//     or more simply:
//         DNS_LABEL(\.DNS_LABEL)*
//
// IANA_SVC_NAME: This is a string, no more than 15 characters long, that
//      conforms to the definition of IANA service name in RFC 6335.
//      It must contains at least one letter [a-z] and it must contains only [a-z0-9-].
//      Hypens ('-') cannot be leading or trailing character of the string
//      and cannot be adjacent to other hyphens.

// ObjectMeta is metadata that all persisted resources must have, which includes all objects
// users must create.
type ObjectMeta struct {
	// Name is unique within a namespace.  Name is required when creating resources, although
	// some resources may allow a client to request the generation of an appropriate name
	// automatically. Name is primarily intended for creation idempotence and configuration
	// definition.
	Name string `json:"name,omitempty"`

	// GenerateName indicates that the name should be made unique by the server prior to persisting
	// it. A non-empty value for the field indicates the name will be made unique (and the name
	// returned to the client will be different than the name passed). The value of this field will
	// be combined with a unique suffix on the server if the Name field has not been provided.
	// The provided value must be valid within the rules for Name, and may be truncated by the length
	// of the suffix required to make the value unique on the server.
	//
	// If this field is specified, and Name is not present, the server will NOT return a 409 if the
	// generated name exists - instead, it will either return 201 Created or 500 with Reason
	// ServerTimeout indicating a unique name could not be found in the time allotted, and the client
	// should retry (optionally after the time indicated in the Retry-After header).
	GenerateName string `json:"generateName,omitempty"`

	// Namespace defines the space within which name must be unique. An empty namespace is
	// equivalent to the "default" namespace, but "default" is the canonical representation.
	// Not all objects are required to be scoped to a namespace - the value of this field for
	// those objects will be empty.
	Namespace string `json:"namespace,omitempty"`

	// SelfLink is a URL representing this object.
	SelfLink string `json:"selfLink,omitempty"`

	// UID is the unique in time and space value for this object. It is typically generated by
	// the server on successful creation of a resource and is not allowed to change on PUT
	// operations.
	UID types.UID `json:"uid,omitempty"`

	// An opaque value that represents the version of this resource. May be used for optimistic
	// concurrency, change detection, and the watch operation on a resource or set of resources.
	// Clients must treat these values as opaque and values may only be valid for a particular
	// resource or set of resources. Only servers will generate resource versions.
	ResourceVersion string `json:"resourceVersion,omitempty"`

	// A sequence number representing a specific generation of the desired state.
	// Currently only implemented by replication controllers.
	Generation int64 `json:"generation,omitempty"`

	// CreationTimestamp is a timestamp representing the server time when this object was
	// created. It is not guaranteed to be set in happens-before order across separate operations.
	// Clients may not set this value. It is represented in RFC3339 form and is in UTC.
	CreationTimestamp unversioned.Time `json:"creationTimestamp,omitempty"`

	// DeletionTimestamp is the time after which this resource will be deleted. This
	// field is set by the server when a graceful deletion is requested by the user, and is not
	// directly settable by a client. The resource will be deleted (no longer visible from
	// resource lists, and not reachable by name) after the time in this field. Once set, this
	// value may not be unset or be set further into the future, although it may be shortened
	// or the resource may be deleted prior to this time. For example, a user may request that
	// a pod is deleted in 30 seconds. The Kubelet will react by sending a graceful termination
	// signal to the containers in the pod. Once the resource is deleted in the API, the Kubelet
	// will send a hard termination signal to the container.
	DeletionTimestamp *unversioned.Time `json:"deletionTimestamp,omitempty"`

	// DeletionGracePeriodSeconds records the graceful deletion value set when graceful deletion
	// was requested. Represents the most recent grace period, and may only be shortened once set.
	DeletionGracePeriodSeconds *int64 `json:"deletionGracePeriodSeconds,omitempty"`

	// Labels are key value pairs that may be used to scope and select individual resources.
	// Label keys are of the form:
	//     label-key ::= prefixed-name | name
	//     prefixed-name ::= prefix '/' name
	//     prefix ::= DNS_SUBDOMAIN
	//     name ::= DNS_LABEL
	// The prefix is optional.  If the prefix is not specified, the key is assumed to be private
	// to the user.  Other system components that wish to use labels must specify a prefix.  The
	// "kubernetes.io/" prefix is reserved for use by kubernetes components.
	// TODO: replace map[string]string with labels.LabelSet type
	Labels map[string]string `json:"labels,omitempty"`

	// Annotations are unstructured key value data stored with a resource that may be set by
	// external tooling. They are not queryable and should be preserved when modifying
	// objects.  Annotation keys have the same formatting restrictions as Label keys. See the
	// comments on Labels for details.
	Annotations map[string]string `json:"annotations,omitempty"`
}

const (
	// NamespaceDefault means the object is in the default namespace which is applied when not specified by clients
	NamespaceDefault string = "default"
	// NamespaceAll is the default argument to specify on a context when you want to list or filter resources across all namespaces
	NamespaceAll string = ""
	// NamespaceNone is the argument for a context when there is no namespace.
	NamespaceNone string = ""
	// NamespaceSystem is the system namespace where we place system components.
	NamespaceSystem string = "kube-system"
	// TerminationMessagePathDefault means the default path to capture the application termination message running in a container
	TerminationMessagePathDefault string = "/dev/termination-log"
)

// Volume represents a named volume in a pod that may be accessed by any containers in the pod.
type Volume struct {
	// Required: This must be a DNS_LABEL.  Each volume in a pod must have
	// a unique name.
	Name string `json:"name"`
	// The VolumeSource represents the location and type of a volume to mount.
	// This is optional for now. If not specified, the Volume is implied to be an EmptyDir.
	// This implied behavior is deprecated and will be removed in a future version.
	VolumeSource `json:",inline,omitempty"`
}

// VolumeSource represents the source location of a volume to mount.
// Only one of its members may be specified.
type VolumeSource struct {
	// HostPath represents file or directory on the host machine that is
	// directly exposed to the container. This is generally used for system
	// agents or other privileged things that are allowed to see the host
	// machine. Most containers will NOT need this.
	// ---
	// TODO(jonesdl) We need to restrict who can use host directory mounts and who can/can not
	// mount host directories as read/write.
	HostPath *HostPathVolumeSource `json:"hostPath,omitempty"`
	// EmptyDir represents a temporary directory that shares a pod's lifetime.
	EmptyDir *EmptyDirVolumeSource `json:"emptyDir,omitempty"`
	// GCEPersistentDisk represents a GCE Disk resource that is attached to a
	// kubelet's host machine and then exposed to the pod.
	GCEPersistentDisk *GCEPersistentDiskVolumeSource `json:"gcePersistentDisk,omitempty"`
	// AWSElasticBlockStore represents an AWS EBS disk that is attached to a
	// kubelet's host machine and then exposed to the pod.
	AWSElasticBlockStore *AWSElasticBlockStoreVolumeSource `json:"awsElasticBlockStore,omitempty"`
	// GitRepo represents a git repository at a particular revision.
	GitRepo *GitRepoVolumeSource `json:"gitRepo,omitempty"`
	// Secret represents a secret that should populate this volume.
	Secret *SecretVolumeSource `json:"secret,omitempty"`
	// NFS represents an NFS mount on the host that shares a pod's lifetime
	NFS *NFSVolumeSource `json:"nfs,omitempty"`
	// ISCSIVolumeSource represents an ISCSI Disk resource that is attached to a
	// kubelet's host machine and then exposed to the pod.
	ISCSI *ISCSIVolumeSource `json:"iscsi,omitempty"`
	// Glusterfs represents a Glusterfs mount on the host that shares a pod's lifetime
	Glusterfs *GlusterfsVolumeSource `json:"glusterfs,omitempty"`
	// PersistentVolumeClaimVolumeSource represents a reference to a PersistentVolumeClaim in the same namespace
	PersistentVolumeClaim *PersistentVolumeClaimVolumeSource `json:"persistentVolumeClaim,omitempty"`
	// RBD represents a Rados Block Device mount on the host that shares a pod's lifetime
	RBD *RBDVolumeSource `json:"rbd,omitempty"`
	// FlexVolume represents a generic volume resource that is
	// provisioned/attached using a exec based plugin. This is an alpha feature and may change in future.
	FlexVolume *FlexVolumeSource `json:"flexVolume,omitempty"`

	// Cinder represents a cinder volume attached and mounted on kubelets host machine
	Cinder *CinderVolumeSource `json:"cinder,omitempty"`

	// CephFS represents a Cephfs mount on the host that shares a pod's lifetime
	CephFS *CephFSVolumeSource `json:"cephfs,omitempty"`

	// Flocker represents a Flocker volume attached to a kubelet's host machine. This depends on the Flocker control service being running
	Flocker *FlockerVolumeSource `json:"flocker,omitempty"`

	// DownwardAPI represents metadata about the pod that should populate this volume
	DownwardAPI *DownwardAPIVolumeSource `json:"downwardAPI,omitempty"`
	// FC represents a Fibre Channel resource that is attached to a kubelet's host machine and then exposed to the pod.
	FC *FCVolumeSource `json:"fc,omitempty"`
	// AzureFile represents an Azure File Service mount on the host and bind mount to the pod.
	AzureFile *AzureFileVolumeSource `json:"azureFile,omitempty"`
	// ConfigMap represents a configMap that should populate this volume
	ConfigMap *ConfigMapVolumeSource `json:"configMap,omitempty"`
}

// Similar to VolumeSource but meant for the administrator who creates PVs.
// Exactly one of its members must be set.
type PersistentVolumeSource struct {
	// GCEPersistentDisk represents a GCE Disk resource that is attached to a
	// kubelet's host machine and then exposed to the pod.
	GCEPersistentDisk *GCEPersistentDiskVolumeSource `json:"gcePersistentDisk,omitempty"`
	// AWSElasticBlockStore represents an AWS EBS disk that is attached to a
	// kubelet's host machine and then exposed to the pod.
	AWSElasticBlockStore *AWSElasticBlockStoreVolumeSource `json:"awsElasticBlockStore,omitempty"`
	// HostPath represents a directory on the host.
	// Provisioned by a developer or tester.
	// This is useful for single-node development and testing only!
	// On-host storage is not supported in any way and WILL NOT WORK in a multi-node cluster.
	HostPath *HostPathVolumeSource `json:"hostPath,omitempty"`
	// Glusterfs represents a Glusterfs volume that is attached to a host and exposed to the pod
	Glusterfs *GlusterfsVolumeSource `json:"glusterfs,omitempty"`
	// NFS represents an NFS mount on the host that shares a pod's lifetime
	NFS *NFSVolumeSource `json:"nfs,omitempty"`
	// RBD represents a Rados Block Device mount on the host that shares a pod's lifetime
	RBD *RBDVolumeSource `json:"rbd,omitempty"`
	// ISCSIVolumeSource represents an ISCSI resource that is attached to a
	// kubelet's host machine and then exposed to the pod.
	ISCSI *ISCSIVolumeSource `json:"iscsi,omitempty"`
	// FlexVolume represents a generic volume resource that is
	// provisioned/attached using a exec based plugin. This is an alpha feature and may change in future.
	FlexVolume *FlexVolumeSource `json:"flexVolume,omitempty"`
	// Cinder represents a cinder volume attached and mounted on kubelets host machine
	Cinder *CinderVolumeSource `json:"cinder,omitempty"`
	// CephFS represents a Ceph FS mount on the host that shares a pod's lifetime
	CephFS *CephFSVolumeSource `json:"cephfs,omitempty"`
	// FC represents a Fibre Channel resource that is attached to a kubelet's host machine and then exposed to the pod.
	FC *FCVolumeSource `json:"fc,omitempty"`
	// Flocker represents a Flocker volume attached to a kubelet's host machine. This depends on the Flocker control service being running
	Flocker *FlockerVolumeSource `json:"flocker,omitempty"`
	// AzureFile represents an Azure File Service mount on the host and bind mount to the pod.
	AzureFile *AzureFileVolumeSource `json:"azureFile,omitempty"`
}

type PersistentVolumeClaimVolumeSource struct {
	// ClaimName is the name of a PersistentVolumeClaim in the same namespace as the pod using this volume
	ClaimName string `json:"claimName"`
	// Optional: Defaults to false (read/write).  ReadOnly here
	// will force the ReadOnly setting in VolumeMounts
	ReadOnly bool `json:"readOnly,omitempty"`
}

// +genclient=true,nonNamespaced=true

type PersistentVolume struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	//Spec defines a persistent volume owned by the cluster
	Spec PersistentVolumeSpec `json:"spec,omitempty"`

	// Status represents the current information about persistent volume.
	Status PersistentVolumeStatus `json:"status,omitempty"`
}

type PersistentVolumeSpec struct {
	// Resources represents the actual resources of the volume
	Capacity ResourceList `json:"capacity"`
	// Source represents the location and type of a volume to mount.
	PersistentVolumeSource `json:",inline"`
	// AccessModes contains all ways the volume can be mounted
	AccessModes []PersistentVolumeAccessMode `json:"accessModes,omitempty"`
	// ClaimRef is part of a bi-directional binding between PersistentVolume and PersistentVolumeClaim.
	// ClaimRef is expected to be non-nil when bound.
	// claim.VolumeName is the authoritative bind between PV and PVC.
	ClaimRef *ObjectReference `json:"claimRef,omitempty"`
	// Optional: what happens to a persistent volume when released from its claim.
	PersistentVolumeReclaimPolicy PersistentVolumeReclaimPolicy `json:"persistentVolumeReclaimPolicy,omitempty"`
}

// PersistentVolumeReclaimPolicy describes a policy for end-of-life maintenance of persistent volumes
type PersistentVolumeReclaimPolicy string

const (
	// PersistentVolumeReclaimRecycle means the volume will be recycled back into the pool of unbound persistent volumes on release from its claim.
	// The volume plugin must support Recycling.
	PersistentVolumeReclaimRecycle PersistentVolumeReclaimPolicy = "Recycle"
	// PersistentVolumeReclaimDelete means the volume will be deleted from Kubernetes on release from its claim.
	// The volume plugin must support Deletion.
	PersistentVolumeReclaimDelete PersistentVolumeReclaimPolicy = "Delete"
	// PersistentVolumeReclaimRetain means the volume will left in its current phase (Released) for manual reclamation by the administrator.
	// The default policy is Retain.
	PersistentVolumeReclaimRetain PersistentVolumeReclaimPolicy = "Retain"
)

type PersistentVolumeStatus struct {
	// Phase indicates if a volume is available, bound to a claim, or released by a claim
	Phase PersistentVolumePhase `json:"phase,omitempty"`
	// A human-readable message indicating details about why the volume is in this state.
	Message string `json:"message,omitempty"`
	// Reason is a brief CamelCase string that describes any failure and is meant for machine parsing and tidy display in the CLI
	Reason string `json:"reason,omitempty"`
}

type PersistentVolumeList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`
	Items                []PersistentVolume `json:"items"`
}

// +genclient=true

// PersistentVolumeClaim is a user's request for and claim to a persistent volume
type PersistentVolumeClaim struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the volume requested by a pod author
	Spec PersistentVolumeClaimSpec `json:"spec,omitempty"`

	// Status represents the current information about a claim
	Status PersistentVolumeClaimStatus `json:"status,omitempty"`
}

type PersistentVolumeClaimList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`
	Items                []PersistentVolumeClaim `json:"items"`
}

// PersistentVolumeClaimSpec describes the common attributes of storage devices
// and allows a Source for provider-specific attributes
type PersistentVolumeClaimSpec struct {
	// Contains the types of access modes required
	AccessModes []PersistentVolumeAccessMode `json:"accessModes,omitempty"`
	// Resources represents the minimum resources required
	Resources ResourceRequirements `json:"resources,omitempty"`
	// VolumeName is the binding reference to the PersistentVolume backing this claim
	VolumeName string `json:"volumeName,omitempty"`
}

type PersistentVolumeClaimStatus struct {
	// Phase represents the current phase of PersistentVolumeClaim
	Phase PersistentVolumeClaimPhase `json:"phase,omitempty"`
	// AccessModes contains all ways the volume backing the PVC can be mounted
	AccessModes []PersistentVolumeAccessMode `json:"accessModes,omitempty"`
	// Represents the actual resources of the underlying volume
	Capacity ResourceList `json:"capacity,omitempty"`
}

type PersistentVolumeAccessMode string

const (
	// can be mounted read/write mode to exactly 1 host
	ReadWriteOnce PersistentVolumeAccessMode = "ReadWriteOnce"
	// can be mounted in read-only mode to many hosts
	ReadOnlyMany PersistentVolumeAccessMode = "ReadOnlyMany"
	// can be mounted in read/write mode to many hosts
	ReadWriteMany PersistentVolumeAccessMode = "ReadWriteMany"
)

type PersistentVolumePhase string

const (
	// used for PersistentVolumes that are not available
	VolumePending PersistentVolumePhase = "Pending"
	// used for PersistentVolumes that are not yet bound
	// Available volumes are held by the binder and matched to PersistentVolumeClaims
	VolumeAvailable PersistentVolumePhase = "Available"
	// used for PersistentVolumes that are bound
	VolumeBound PersistentVolumePhase = "Bound"
	// used for PersistentVolumes where the bound PersistentVolumeClaim was deleted
	// released volumes must be recycled before becoming available again
	// this phase is used by the persistent volume claim binder to signal to another process to reclaim the resource
	VolumeReleased PersistentVolumePhase = "Released"
	// used for PersistentVolumes that failed to be correctly recycled or deleted after being released from a claim
	VolumeFailed PersistentVolumePhase = "Failed"
)

type PersistentVolumeClaimPhase string

const (
	// used for PersistentVolumeClaims that are not yet bound
	ClaimPending PersistentVolumeClaimPhase = "Pending"
	// used for PersistentVolumeClaims that are bound
	ClaimBound PersistentVolumeClaimPhase = "Bound"
)

// Represents a host path mapped into a pod.
// Host path volumes do not support ownership management or SELinux relabeling.
type HostPathVolumeSource struct {
	Path string `json:"path"`
}

// Represents an empty directory for a pod.
// Empty directory volumes support ownership management and SELinux relabeling.
type EmptyDirVolumeSource struct {
	// TODO: Longer term we want to represent the selection of underlying
	// media more like a scheduling problem - user says what traits they
	// need, we give them a backing store that satisifies that.  For now
	// this will cover the most common needs.
	// Optional: what type of storage medium should back this directory.
	// The default is "" which means to use the node's default medium.
	Medium StorageMedium `json:"medium,omitempty"`
}

// StorageMedium defines ways that storage can be allocated to a volume.
type StorageMedium string

const (
	StorageMediumDefault StorageMedium = ""       // use whatever the default is for the node
	StorageMediumMemory  StorageMedium = "Memory" // use memory (tmpfs)
)

// Protocol defines network protocols supported for things like container ports.
type Protocol string

const (
	// ProtocolTCP is the TCP protocol.
	ProtocolTCP Protocol = "TCP"
	// ProtocolUDP is the UDP protocol.
	ProtocolUDP Protocol = "UDP"
)

// Represents a Persistent Disk resource in Google Compute Engine.
//
// A GCE PD must exist and be formatted before mounting to a container.
// The disk must also be in the same GCE project and zone as the kubelet.
// A GCE PD can only be mounted as read/write once.
// GCE PDs support ownership management and SELinux relabeling.
type GCEPersistentDiskVolumeSource struct {
	// Unique name of the PD resource. Used to identify the disk in GCE
	PDName string `json:"pdName"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
	// TODO: how do we prevent errors in the filesystem from compromising the machine
	FSType string `json:"fsType,omitempty"`
	// Optional: Partition on the disk to mount.
	// If omitted, kubelet will attempt to mount the device name.
	// Ex. For /dev/sda1, this field is "1", for /dev/sda, this field is 0 or empty.
	Partition int `json:"partition,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents an ISCSI disk.
// ISCSI volumes can only be mounted as read/write once.
// ISCSI volumes support ownership management and SELinux relabeling.
type ISCSIVolumeSource struct {
	// Required: iSCSI target portal
	// the portal is either an IP or ip_addr:port if port is other than default (typically TCP ports 860 and 3260)
	TargetPortal string `json:"targetPortal,omitempty"`
	// Required:  target iSCSI Qualified Name
	IQN string `json:"iqn,omitempty"`
	// Required: iSCSI target lun number
	Lun int `json:"lun,omitempty"`
	// Optional: Defaults to 'default' (tcp). iSCSI interface name that uses an iSCSI transport.
	ISCSIInterface string `json:"iscsiInterface,omitempty"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
	// TODO: how do we prevent errors in the filesystem from compromising the machine
	FSType string `json:"fsType,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a Fibre Channel volume.
// Fibre Channel volumes can only be mounted as read/write once.
// Fibre Channel volumes support ownership management and SELinux relabeling.
type FCVolumeSource struct {
	// Required: FC target world wide names (WWNs)
	TargetWWNs []string `json:"targetWWNs"`
	// Required: FC target lun number
	Lun *int `json:"lun"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
	// TODO: how do we prevent errors in the filesystem from compromising the machine
	FSType string `json:"fsType,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// FlexVolume represents a generic volume resource that is
// provisioned/attached using a exec based plugin. This is an alpha feature and may change in future.
type FlexVolumeSource struct {
	// Driver is the name of the driver to use for this volume.
	Driver string `json:"driver"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". The default filesystem depends on FlexVolume script.
	FSType string `json:"fsType,omitempty"`
	// Optional: SecretRef is reference to the authentication secret for User, default is empty.
	SecretRef *LocalObjectReference `json:"secretRef,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
	// Optional: Extra driver options if any.
	Options map[string]string `json:"options,omitempty"`
}

// Represents a Persistent Disk resource in AWS.
//
// An AWS EBS disk must exist and be formatted before mounting to a container.
// The disk must also be in the same AWS zone as the kubelet.
// A AWS EBS disk can only be mounted as read/write once.
// AWS EBS volumes support ownership management and SELinux relabeling.
type AWSElasticBlockStoreVolumeSource struct {
	// Unique id of the persistent disk resource. Used to identify the disk in AWS
	VolumeID string `json:"volumeID"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
	// TODO: how do we prevent errors in the filesystem from compromising the machine
	FSType string `json:"fsType,omitempty"`
	// Optional: Partition on the disk to mount.
	// If omitted, kubelet will attempt to mount the device name.
	// Ex. For /dev/sda1, this field is "1", for /dev/sda, this field is 0 or empty.
	Partition int `json:"partition,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a volume that is populated with the contents of a git repository.
// Git repo volumes do not support ownership management.
// Git repo volumes support SELinux relabeling.
type GitRepoVolumeSource struct {
	// Repository URL
	Repository string `json:"repository"`
	// Commit hash, this is optional
	Revision string `json:"revision,omitempty"`
	// Clone target, this is optional
	// Must not contain or start with '..'.  If '.' is supplied, the volume directory will be the
	// git repository.  Otherwise, if specified, the volume will contain the git repository in
	// the subdirectory with the given name.
	Directory string `json:"directory,omitempty"`
	// TODO: Consider credentials here.
}

// Adapts a Secret into a volume.
//
// The contents of the target Secret's Data field will be presented in a volume
// as files using the keys in the Data field as the file names.
// Secret volumes support ownership management and SELinux relabeling.
type SecretVolumeSource struct {
	// Name of the secret in the pod's namespace to use.
	SecretName string `json:"secretName,omitempty"`
}

// Represents an NFS mount that lasts the lifetime of a pod.
// NFS volumes do not support ownership management or SELinux relabeling.
type NFSVolumeSource struct {
	// Server is the hostname or IP address of the NFS server
	Server string `json:"server"`

	// Path is the exported NFS share
	Path string `json:"path"`

	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the NFS export to be mounted with read-only permissions
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a Glusterfs mount that lasts the lifetime of a pod.
// Glusterfs volumes do not support ownership management or SELinux relabeling.
type GlusterfsVolumeSource struct {
	// Required: EndpointsName is the endpoint name that details Glusterfs topology
	EndpointsName string `json:"endpoints"`

	// Required: Path is the Glusterfs volume path
	Path string `json:"path"`

	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the Glusterfs to be mounted with read-only permissions
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a Rados Block Device mount that lasts the lifetime of a pod.
// RBD volumes support ownership management and SELinux relabeling.
type RBDVolumeSource struct {
	// Required: CephMonitors is a collection of Ceph monitors
	CephMonitors []string `json:"monitors"`
	// Required: RBDImage is the rados image name
	RBDImage string `json:"image"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
	// TODO: how do we prevent errors in the filesystem from compromising the machine
	FSType string `json:"fsType,omitempty"`
	// Optional: RadosPool is the rados pool name,default is rbd
	RBDPool string `json:"pool"`
	// Optional: RBDUser is the rados user name, default is admin
	RadosUser string `json:"user"`
	// Optional: Keyring is the path to key ring for RBDUser, default is /etc/ceph/keyring
	Keyring string `json:"keyring"`
	// Optional: SecretRef is name of the authentication secret for RBDUser, default is empty.
	SecretRef *LocalObjectReference `json:"secretRef"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a cinder volume resource in Openstack.
// A Cinder volume must exist and be formatted before mounting to a container.
// The volume must also be in the same region as the kubelet.
// Cinder volumes support ownership management and SELinux relabeling.
type CinderVolumeSource struct {
	// Unique id of the volume used to identify the cinder volume
	VolumeID string `json:"volumeID"`
	// Filesystem type to mount.
	// Must be a filesystem type supported by the host operating system.
	// Ex. "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified.
	FSType string `json:"fsType,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a Ceph Filesystem mount that lasts the lifetime of a pod
// Cephfs volumes do not support ownership management or SELinux relabeling.
type CephFSVolumeSource struct {
	// Required: Monitors is a collection of Ceph monitors
	Monitors []string `json:"monitors"`
	// Optional: Used as the mounted root, rather than the full Ceph tree, default is /
	Path string `json:"path,omitempty"`
	// Optional: User is the rados user name, default is admin
	User string `json:"user,omitempty"`
	// Optional: SecretFile is the path to key ring for User, default is /etc/ceph/user.secret
	SecretFile string `json:"secretFile,omitempty"`
	// Optional: SecretRef is reference to the authentication secret for User, default is empty.
	SecretRef *LocalObjectReference `json:"secretRef,omitempty"`
	// Optional: Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Represents a Flocker volume mounted by the Flocker agent.
// Flocker volumes do not support ownership management or SELinux relabeling.
type FlockerVolumeSource struct {
	// Required: the volume name. This is going to be store on metadata -> name on the payload for Flocker
	DatasetName string `json:"datasetName"`
}

// Represents a volume containing downward API info.
// Downward API volumes support ownership management and SELinux relabeling.
type DownwardAPIVolumeSource struct {
	// Items is a list of DownwardAPIVolume file
	Items []DownwardAPIVolumeFile `json:"items,omitempty"`
}

// Represents a single file containing information from the downward API
type DownwardAPIVolumeFile struct {
	// Required: Path is  the relative path name of the file to be created. Must not be absolute or contain the '..' path. Must be utf-8 encoded. The first item of the relative path must not start with '..'
	Path string `json:"path"`
	// Required: Selects a field of the pod: only annotations, labels, name and  namespace are supported.
	FieldRef ObjectFieldSelector `json:"fieldRef"`
}

// AzureFile represents an Azure File Service mount on the host and bind mount to the pod.
type AzureFileVolumeSource struct {
	// the name of secret that contains Azure Storage Account Name and Key
	SecretName string `json:"secretName"`
	// Share Name
	ShareName string `json:"shareName"`
	// Defaults to false (read/write). ReadOnly here will force
	// the ReadOnly setting in VolumeMounts.
	ReadOnly bool `json:"readOnly,omitempty"`
}

// Adapts a ConfigMap into a volume.
//
// The contents of the target ConfigMap's Data field will be presented in a
// volume as files using the keys in the Data field as the file names, unless
// the items element is populated with specific mappings of keys to paths.
// ConfigMap volumes support ownership management and SELinux relabeling.
type ConfigMapVolumeSource struct {
	LocalObjectReference `json:",inline"`
	// If unspecified, each key-value pair in the Data field of the referenced
	// ConfigMap will be projected into the volume as a file whose name is the
	// key and content is the value. If specified, the listed keys will be
	// projected into the specified paths, and unlisted keys will not be
	// present. If a key is specified which is not present in the ConfigMap,
	// the volume setup will error. Paths must be relative and may not contain
	// the '..' path or start with '..'.
	Items []KeyToPath `json:"items,omitempty"`
}

// Maps a string key to a path within a volume.
type KeyToPath struct {
	// The key to project.
	Key string `json:"key"`

	// The relative path of the file to map the key to.
	// May not be an absolute path.
	// May not contain the path element '..'.
	// May not start with the string '..'.
	Path string `json:"path"`
}

// ContainerPort represents a network port in a single container
type ContainerPort struct {
	// Optional: If specified, this must be an IANA_SVC_NAME  Each named port
	// in a pod must have a unique name.
	Name string `json:"name,omitempty"`
	// Optional: If specified, this must be a valid port number, 0 < x < 65536.
	// If HostNetwork is specified, this must match ContainerPort.
	HostPort int `json:"hostPort,omitempty"`
	// Required: This must be a valid port number, 0 < x < 65536.
	ContainerPort int `json:"containerPort"`
	// Required: Supports "TCP" and "UDP".
	Protocol Protocol `json:"protocol,omitempty"`
	// Optional: What host IP to bind the external port to.
	HostIP string `json:"hostIP,omitempty"`
}

// VolumeMount describes a mounting of a Volume within a container.
type VolumeMount struct {
	// Required: This must match the Name of a Volume [above].
	Name string `json:"name"`
	// Optional: Defaults to false (read-write).
	ReadOnly bool `json:"readOnly,omitempty"`
	// Required.
	MountPath string `json:"mountPath"`
}

// EnvVar represents an environment variable present in a Container.
type EnvVar struct {
	// Required: This must be a C_IDENTIFIER.
	Name string `json:"name"`
	// Optional: no more than one of the following may be specified.
	// Optional: Defaults to ""; variable references $(VAR_NAME) are expanded
	// using the previous defined environment variables in the container and
	// any service environment variables.  If a variable cannot be resolved,
	// the reference in the input string will be unchanged.  The $(VAR_NAME)
	// syntax can be escaped with a double $$, ie: $$(VAR_NAME).  Escaped
	// references will never be expanded, regardless of whether the variable
	// exists or not.
	Value string `json:"value,omitempty"`
	// Optional: Specifies a source the value of this var should come from.
	ValueFrom *EnvVarSource `json:"valueFrom,omitempty"`
}

// EnvVarSource represents a source for the value of an EnvVar.
// Only one of its fields may be set.
type EnvVarSource struct {
	// Selects a field of the pod; only name and namespace are supported.
	FieldRef *ObjectFieldSelector `json:"fieldRef,omitempty"`
	// Selects a key of a ConfigMap.
	ConfigMapKeyRef *ConfigMapKeySelector `json:"configMapKeyRef,omitempty"`
	// Selects a key of a secret in the pod's namespace.
	SecretKeyRef *SecretKeySelector `json:"secretKeyRef,omitempty"`
}

// ObjectFieldSelector selects an APIVersioned field of an object.
type ObjectFieldSelector struct {
	// Required: Version of the schema the FieldPath is written in terms of.
	// If no value is specified, it will be defaulted to the APIVersion of the
	// enclosing object.
	APIVersion string `json:"apiVersion"`
	// Required: Path of the field to select in the specified API version
	FieldPath string `json:"fieldPath"`
}

// Selects a key from a ConfigMap.
type ConfigMapKeySelector struct {
	// The ConfigMap to select from.
	LocalObjectReference `json:",inline"`
	// The key to select.
	Key string `json:"key"`
}

// SecretKeySelector selects a key of a Secret.
type SecretKeySelector struct {
	// The name of the secret in the pod's namespace to select from.
	LocalObjectReference `json:",inline"`
	// The key of the secret to select from.  Must be a valid secret key.
	Key string `json:"key"`
}

// HTTPHeader describes a custom header to be used in HTTP probes
type HTTPHeader struct {
	// The header field name
	Name string `json:"name"`
	// The header field value
	Value string `json:"value"`
}

// HTTPGetAction describes an action based on HTTP Get requests.
type HTTPGetAction struct {
	// Optional: Path to access on the HTTP server.
	Path string `json:"path,omitempty"`
	// Required: Name or number of the port to access on the container.
	Port intstr.IntOrString `json:"port,omitempty"`
	// Optional: Host name to connect to, defaults to the pod IP. You
	// probably want to set "Host" in httpHeaders instead.
	Host string `json:"host,omitempty"`
	// Optional: Scheme to use for connecting to the host, defaults to HTTP.
	Scheme URIScheme `json:"scheme,omitempty"`
	// Optional: Custom headers to set in the request. HTTP allows repeated headers.
	HTTPHeaders []HTTPHeader `json:"httpHeaders,omitempty"`
}

// URIScheme identifies the scheme used for connection to a host for Get actions
type URIScheme string

const (
	// URISchemeHTTP means that the scheme used will be http://
	URISchemeHTTP URIScheme = "HTTP"
	// URISchemeHTTPS means that the scheme used will be https://
	URISchemeHTTPS URIScheme = "HTTPS"
)

// TCPSocketAction describes an action based on opening a socket
type TCPSocketAction struct {
	// Required: Port to connect to.
	Port intstr.IntOrString `json:"port,omitempty"`
}

// ExecAction describes a "run in container" action.
type ExecAction struct {
	// Command is the command line to execute inside the container, the working directory for the
	// command  is root ('/') in the container's filesystem.  The command is simply exec'd, it is
	// not run inside a shell, so traditional shell instructions ('|', etc) won't work.  To use
	// a shell, you need to explicitly call out to that shell.
	Command []string `json:"command,omitempty"`
}

// Probe describes a health check to be performed against a container to determine whether it is
// alive or ready to receive traffic.
type Probe struct {
	// The action taken to determine the health of a container
	Handler `json:",inline"`
	// Length of time before health checking is activated.  In seconds.
	InitialDelaySeconds int `json:"initialDelaySeconds,omitempty"`
	// Length of time before health checking times out.  In seconds.
	TimeoutSeconds int `json:"timeoutSeconds,omitempty"`
	// How often (in seconds) to perform the probe.
	PeriodSeconds int `json:"periodSeconds,omitempty"`
	// Minimum consecutive successes for the probe to be considered successful after having failed.
	// Must be 1 for liveness.
	SuccessThreshold int `json:"successThreshold,omitempty"`
	// Minimum consecutive failures for the probe to be considered failed after having succeeded.
	FailureThreshold int `json:"failureThreshold,omitempty"`
}

// PullPolicy describes a policy for if/when to pull a container image
type PullPolicy string

const (
	// PullAlways means that kubelet always attempts to pull the latest image.  Container will fail If the pull fails.
	PullAlways PullPolicy = "Always"
	// PullNever means that kubelet never pulls an image, but only uses a local image.  Container will fail if the image isn't present
	PullNever PullPolicy = "Never"
	// PullIfNotPresent means that kubelet pulls if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
	PullIfNotPresent PullPolicy = "IfNotPresent"
)

// Capability represent POSIX capabilities type
type Capability string

// Capabilities represent POSIX capabilities that can be added or removed to a running container.
type Capabilities struct {
	// Added capabilities
	Add []Capability `json:"add,omitempty"`
	// Removed capabilities
	Drop []Capability `json:"drop,omitempty"`
}

// ResourceRequirements describes the compute resource requirements.
type ResourceRequirements struct {
	// Limits describes the maximum amount of compute resources allowed.
	Limits ResourceList `json:"limits,omitempty"`
	// Requests describes the minimum amount of compute resources required.
	// If Request is omitted for a container, it defaults to Limits if that is explicitly specified,
	// otherwise to an implementation-defined value
	Requests ResourceList `json:"requests,omitempty"`
}

// Container represents a single container that is expected to be run on the host.
type Container struct {
	// Required: This must be a DNS_LABEL.  Each container in a pod must
	// have a unique name.
	Name string `json:"name"`
	// Required.
	Image string `json:"image"`
	// Optional: The docker image's entrypoint is used if this is not provided; cannot be updated.
	// Variable references $(VAR_NAME) are expanded using the container's environment.  If a variable
	// cannot be resolved, the reference in the input string will be unchanged.  The $(VAR_NAME) syntax
	// can be escaped with a double $$, ie: $$(VAR_NAME).  Escaped references will never be expanded,
	// regardless of whether the variable exists or not.
	Command []string `json:"command,omitempty"`
	// Optional: The docker image's cmd is used if this is not provided; cannot be updated.
	// Variable references $(VAR_NAME) are expanded using the container's environment.  If a variable
	// cannot be resolved, the reference in the input string will be unchanged.  The $(VAR_NAME) syntax
	// can be escaped with a double $$, ie: $$(VAR_NAME).  Escaped references will never be expanded,
	// regardless of whether the variable exists or not.
	Args []string `json:"args,omitempty"`
	// Optional: Defaults to Docker's default.
	WorkingDir string          `json:"workingDir,omitempty"`
	Ports      []ContainerPort `json:"ports,omitempty"`
	Env        []EnvVar        `json:"env,omitempty"`
	// Compute resource requirements.
	Resources      ResourceRequirements `json:"resources,omitempty"`
	VolumeMounts   []VolumeMount        `json:"volumeMounts,omitempty"`
	LivenessProbe  *Probe               `json:"livenessProbe,omitempty"`
	ReadinessProbe *Probe               `json:"readinessProbe,omitempty"`
	Lifecycle      *Lifecycle           `json:"lifecycle,omitempty"`
	// Required.
	TerminationMessagePath string `json:"terminationMessagePath,omitempty"`
	// Required: Policy for pulling images for this container
	ImagePullPolicy PullPolicy `json:"imagePullPolicy"`
	// Optional: SecurityContext defines the security options the container should be run with.
	// If set, the fields of SecurityContext override the equivalent fields of PodSecurityContext.
	SecurityContext *SecurityContext `json:"securityContext,omitempty"`

	// Variables for interactive containers, these have very specialized use-cases (e.g. debugging)
	// and shouldn't be used for general purpose containers.
	Stdin     bool `json:"stdin,omitempty"`
	StdinOnce bool `json:"stdinOnce,omitempty"`
	TTY       bool `json:"tty,omitempty"`
}

// Handler defines a specific action that should be taken
// TODO: pass structured data to these actions, and document that data here.
type Handler struct {
	// One and only one of the following should be specified.
	// Exec specifies the action to take.
	Exec *ExecAction `json:"exec,omitempty"`
	// HTTPGet specifies the http request to perform.
	HTTPGet *HTTPGetAction `json:"httpGet,omitempty"`
	// TCPSocket specifies an action involving a TCP port.
	// TODO: implement a realistic TCP lifecycle hook
	TCPSocket *TCPSocketAction `json:"tcpSocket,omitempty"`
}

// Lifecycle describes actions that the management system should take in response to container lifecycle
// events.  For the PostStart and PreStop lifecycle handlers, management of the container blocks
// until the action is complete, unless the container process fails, in which case the handler is aborted.
type Lifecycle struct {
	// PostStart is called immediately after a container is created.  If the handler fails, the container
	// is terminated and restarted.
	PostStart *Handler `json:"postStart,omitempty"`
	// PreStop is called immediately before a container is terminated.  The reason for termination is
	// passed to the handler.  Regardless of the outcome of the handler, the container is eventually terminated.
	PreStop *Handler `json:"preStop,omitempty"`
}

// The below types are used by kube_client and api_server.

type ConditionStatus string

// These are valid condition statuses. "ConditionTrue" means a resource is in the condition;
// "ConditionFalse" means a resource is not in the condition; "ConditionUnknown" means kubernetes
// can't decide if a resource is in the condition or not. In the future, we could add other
// intermediate conditions, e.g. ConditionDegraded.
const (
	ConditionTrue    ConditionStatus = "True"
	ConditionFalse   ConditionStatus = "False"
	ConditionUnknown ConditionStatus = "Unknown"
)

type ContainerStateWaiting struct {
	// A brief CamelCase string indicating details about why the container is in waiting state.
	Reason string `json:"reason,omitempty"`
	// A human-readable message indicating details about why the container is in waiting state.
	Message string `json:"message,omitempty"`
}

type ContainerStateRunning struct {
	StartedAt unversioned.Time `json:"startedAt,omitempty"`
}

type ContainerStateTerminated struct {
	ExitCode    int              `json:"exitCode"`
	Signal      int              `json:"signal,omitempty"`
	Reason      string           `json:"reason,omitempty"`
	Message     string           `json:"message,omitempty"`
	StartedAt   unversioned.Time `json:"startedAt,omitempty"`
	FinishedAt  unversioned.Time `json:"finishedAt,omitempty"`
	ContainerID string           `json:"containerID,omitempty"`
}

// ContainerState holds a possible state of container.
// Only one of its members may be specified.
// If none of them is specified, the default one is ContainerStateWaiting.
type ContainerState struct {
	Waiting    *ContainerStateWaiting    `json:"waiting,omitempty"`
	Running    *ContainerStateRunning    `json:"running,omitempty"`
	Terminated *ContainerStateTerminated `json:"terminated,omitempty"`
}

type ContainerStatus struct {
	// Each container in a pod must have a unique name.
	Name                 string         `json:"name"`
	State                ContainerState `json:"state,omitempty"`
	LastTerminationState ContainerState `json:"lastState,omitempty"`
	// Ready specifies whether the container has passed its readiness check.
	Ready bool `json:"ready"`
	// Note that this is calculated from dead containers.  But those containers are subject to
	// garbage collection.  This value will get capped at 5 by GC.
	RestartCount int    `json:"restartCount"`
	Image        string `json:"image"`
	ImageID      string `json:"imageID"`
	ContainerID  string `json:"containerID,omitempty"`
}

// PodPhase is a label for the condition of a pod at the current time.
type PodPhase string

// These are the valid statuses of pods.
const (
	// PodPending means the pod has been accepted by the system, but one or more of the containers
	// has not been started. This includes time before being bound to a node, as well as time spent
	// pulling images onto the host.
	PodPending PodPhase = "Pending"
	// PodRunning means the pod has been bound to a node and all of the containers have been started.
	// At least one container is still running or is in the process of being restarted.
	PodRunning PodPhase = "Running"
	// PodSucceeded means that all containers in the pod have voluntarily terminated
	// with a container exit code of 0, and the system is not going to restart any of these containers.
	PodSucceeded PodPhase = "Succeeded"
	// PodFailed means that all containers in the pod have terminated, and at least one container has
	// terminated in a failure (exited with a non-zero exit code or was stopped by the system).
	PodFailed PodPhase = "Failed"
	// PodUnknown means that for some reason the state of the pod could not be obtained, typically due
	// to an error in communicating with the host of the pod.
	PodUnknown PodPhase = "Unknown"
)

type PodConditionType string

// These are valid conditions of pod.
const (
	// PodReady means the pod is able to service requests and should be added to the
	// load balancing pools of all matching services.
	PodReady PodConditionType = "Ready"
)

type PodCondition struct {
	Type               PodConditionType `json:"type"`
	Status             ConditionStatus  `json:"status"`
	LastProbeTime      unversioned.Time `json:"lastProbeTime,omitempty"`
	LastTransitionTime unversioned.Time `json:"lastTransitionTime,omitempty"`
	Reason             string           `json:"reason,omitempty"`
	Message            string           `json:"message,omitempty"`
}

// RestartPolicy describes how the container should be restarted.
// Only one of the following restart policies may be specified.
// If none of the following policies is specified, the default one
// is RestartPolicyAlways.
type RestartPolicy string

const (
	RestartPolicyAlways    RestartPolicy = "Always"
	RestartPolicyOnFailure RestartPolicy = "OnFailure"
	RestartPolicyNever     RestartPolicy = "Never"
)

// PodList is a list of Pods.
type PodList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Pod `json:"items"`
}

// DNSPolicy defines how a pod's DNS will be configured.
type DNSPolicy string

const (
	// DNSClusterFirst indicates that the pod should use cluster DNS
	// first, if it is available, then fall back on the default (as
	// determined by kubelet) DNS settings.
	DNSClusterFirst DNSPolicy = "ClusterFirst"

	// DNSDefault indicates that the pod should use the default (as
	// determined by kubelet) DNS settings.
	DNSDefault DNSPolicy = "Default"
)

// A node selector represents the union of the results of one or more label queries
// over a set of nodes; that is, it represents the OR of the selectors represented
// by the node selector terms.
type NodeSelector struct {
	//Required. A list of node selector terms. The terms are ORed.
	NodeSelectorTerms []NodeSelectorTerm `json:"nodeSelectorTerms"`
}

// A null or empty node selector term matches no objects.
type NodeSelectorTerm struct {
	//Required. A list of node selector requirements. The requirements are ANDed.
	MatchExpressions []NodeSelectorRequirement `json:"matchExpressions"`
}

// A node selector requirement is a selector that contains values, a key, and an operator
// that relates the key and values.
type NodeSelectorRequirement struct {
	// The label key that the selector applies to.
	Key string `json:"key" patchStrategy:"merge" patchMergeKey:"key"`
	// Represents a key's relationship to a set of values.
	// Valid operators are In, NotIn, Exists, DoesNotExist. Gt, and Lt.
	Operator NodeSelectorOperator `json:"operator"`
	// An array of string values. If the operator is In or NotIn,
	// the values array must be non-empty. If the operator is Exists or DoesNotExist,
	// the values array must be empty. If the operator is Gt or Lt, the values
	// array must have a single element, which will be interpreted as an integer.
	// This array is replaced during a strategic merge patch.
	Values []string `json:"values,omitempty"`
}

// A node selector operator is the set of operators that can be used in
// a node selector requirement.
type NodeSelectorOperator string

const (
	NodeSelectorOpIn           NodeSelectorOperator = "In"
	NodeSelectorOpNotIn        NodeSelectorOperator = "NotIn"
	NodeSelectorOpExists       NodeSelectorOperator = "Exists"
	NodeSelectorOpDoesNotExist NodeSelectorOperator = "DoesNotExist"
	NodeSelectorOpGt           NodeSelectorOperator = "Gt"
	NodeSelectorOpLt           NodeSelectorOperator = "Lt"
)

// Affinity is a group of affinity scheduling rules, currently
// only node affinity, but in the future also inter-pod affinity.
type Affinity struct {
	// Describes node affinity scheduling rules for the pod.
	NodeAffinity *NodeAffinity `json:"nodeAffinity,omitempty"`
}

// Node affinity is a group of node affinity scheduling rules.
type NodeAffinity struct {
	// NOT YET IMPLEMENTED. TODO: Uncomment field once it is implemented.
	// If the affinity requirements specified by this field are not met at
	// scheduling time, the pod will not be scheduled onto the node.
	// If the affinity requirements specified by this field cease to be met
	// at some point during pod execution (e.g. due to an update), the system
	// will try to eventually evict the pod from its node.
	// RequiredDuringSchedulingRequiredDuringExecution *NodeSelector `json:"requiredDuringSchedulingRequiredDuringExecution,omitempty"`

	// If the affinity requirements specified by this field are not met at
	// scheduling time, the pod will not be scheduled onto the node.
	// If the affinity requirements specified by this field cease to be met
	// at some point during pod execution (e.g. due to an update), the system
	// may or may not try to eventually evict the pod from its node.
	RequiredDuringSchedulingIgnoredDuringExecution *NodeSelector `json:"requiredDuringSchedulingIgnoredDuringExecution,omitempty"`
	// The scheduler will prefer to schedule pods to nodes that satisfy
	// the affinity expressions specified by this field, but it may choose
	// a node that violates one or more of the expressions. The node that is
	// most preferred is the one with the greatest sum of weights, i.e.
	// for each node that meets all of the scheduling requirements (resource
	// request, requiredDuringScheduling affinity expressions, etc.),
	// compute a sum by iterating through the elements of this field and adding
	// "weight" to the sum if the node matches the corresponding matchExpressions; the
	// node(s) with the highest sum are the most preferred.
	PreferredDuringSchedulingIgnoredDuringExecution []PreferredSchedulingTerm `json:"preferredDuringSchedulingIgnoredDuringExecution,omitempty"`
}

// An empty preferred scheduling term matches all objects with implicit weight 0
// (i.e. it's a no-op). A null preferred scheduling term matches no objects (i.e. is also a no-op).
type PreferredSchedulingTerm struct {
	// Weight associated with matching the corresponding nodeSelectorTerm, in the range 1-100.
	Weight int `json:"weight"`
	// A node selector term, associated with the corresponding weight.
	Preference NodeSelectorTerm `json:"preference"`
}

// PodSpec is a description of a pod
type PodSpec struct {
	Volumes []Volume `json:"volumes"`
	// Required: there must be at least one container in a pod.
	Containers    []Container   `json:"containers"`
	RestartPolicy RestartPolicy `json:"restartPolicy,omitempty"`
	// Optional duration in seconds the pod needs to terminate gracefully. May be decreased in delete request.
	// Value must be non-negative integer. The value zero indicates delete immediately.
	// If this value is nil, the default grace period will be used instead.
	// The grace period is the duration in seconds after the processes running in the pod are sent
	// a termination signal and the time when the processes are forcibly halted with a kill signal.
	// Set this value longer than the expected cleanup time for your process.
	TerminationGracePeriodSeconds *int64 `json:"terminationGracePeriodSeconds,omitempty"`
	// Optional duration in seconds relative to the StartTime that the pod may be active on a node
	// before the system actively tries to terminate the pod; value must be positive integer
	ActiveDeadlineSeconds *int64 `json:"activeDeadlineSeconds,omitempty"`
	// Required: Set DNS policy.
	DNSPolicy DNSPolicy `json:"dnsPolicy,omitempty"`
	// NodeSelector is a selector which must be true for the pod to fit on a node
	NodeSelector map[string]string `json:"nodeSelector,omitempty"`

	// ServiceAccountName is the name of the ServiceAccount to use to run this pod
	// The pod will be allowed to use secrets referenced by the ServiceAccount
	ServiceAccountName string `json:"serviceAccountName"`

	// NodeName is a request to schedule this pod onto a specific node.  If it is non-empty,
	// the scheduler simply schedules this pod onto that node, assuming that it fits resource
	// requirements.
	NodeName string `json:"nodeName,omitempty"`
	// SecurityContext holds pod-level security attributes and common container settings.
	// Optional: Defaults to empty.  See type description for default values of each field.
	SecurityContext *PodSecurityContext `json:"securityContext,omitempty"`
	// ImagePullSecrets is an optional list of references to secrets in the same namespace to use for pulling any of the images used by this PodSpec.
	// If specified, these secrets will be passed to individual puller implementations for them to use.  For example,
	// in the case of docker, only DockerConfig type secrets are honored.
	ImagePullSecrets []LocalObjectReference `json:"imagePullSecrets,omitempty"`
}

// PodSecurityContext holds pod-level security attributes and common container settings.
// Some fields are also present in container.securityContext.  Field values of
// container.securityContext take precedence over field values of PodSecurityContext.
type PodSecurityContext struct {
	// Use the host's network namespace.  If this option is set, the ports that will be
	// used must be specified.
	// Optional: Default to false
	HostNetwork bool `json:"hostNetwork,omitempty"`
	// Use the host's pid namespace.
	// Optional: Default to false.
	HostPID bool `json:"hostPID,omitempty"`
	// Use the host's ipc namespace.
	// Optional: Default to false.
	HostIPC bool `json:"hostIPC,omitempty"`
	// The SELinux context to be applied to all containers.
	// If unspecified, the container runtime will allocate a random SELinux context for each
	// container.  May also be set in SecurityContext.  If set in
	// both SecurityContext and PodSecurityContext, the value specified in SecurityContext
	// takes precedence for that container.
	SELinuxOptions *SELinuxOptions `json:"seLinuxOptions,omitempty"`
	// The UID to run the entrypoint of the container process.
	// Defaults to user specified in image metadata if unspecified.
	// May also be set in SecurityContext.  If set in both SecurityContext and
	// PodSecurityContext, the value specified in SecurityContext takes precedence
	// for that container.
	RunAsUser *int64 `json:"runAsUser,omitempty"`
	// Indicates that the container must run as a non-root user.
	// If true, the Kubelet will validate the image at runtime to ensure that it
	// does not run as UID 0 (root) and fail to start the container if it does.
	// If unset or false, no such validation will be performed.
	// May also be set in SecurityContext.  If set in both SecurityContext and
	// PodSecurityContext, the value specified in SecurityContext takes precedence.
	RunAsNonRoot *bool `json:"runAsNonRoot,omitempty"`
	// A list of groups applied to the first process run in each container, in addition
	// to the container's primary GID.  If unspecified, no groups will be added to
	// any container.
	SupplementalGroups []int64 `json:"supplementalGroups,omitempty"`
	// A special supplemental group that applies to all containers in a pod.
	// Some volume types allow the Kubelet to change the ownership of that volume
	// to be owned by the pod:
	//
	// 1. The owning GID will be the FSGroup
	// 2. The setgid bit is set (new files created in the volume will be owned by FSGroup)
	// 3. The permission bits are OR'd with rw-rw----
	//
	// If unset, the Kubelet will not modify the ownership and permissions of any volume.
	FSGroup *int64 `json:"fsGroup,omitempty"`
}

// PodStatus represents information about the status of a pod. Status may trail the actual
// state of a system.
type PodStatus struct {
	Phase      PodPhase       `json:"phase,omitempty"`
	Conditions []PodCondition `json:"conditions,omitempty"`
	// A human readable message indicating details about why the pod is in this state.
	Message string `json:"message,omitempty"`
	// A brief CamelCase message indicating details about why the pod is in this state. e.g. 'OutOfDisk'
	Reason string `json:"reason,omitempty"`

	HostIP string `json:"hostIP,omitempty"`
	PodIP  string `json:"podIP,omitempty"`

	// Date and time at which the object was acknowledged by the Kubelet.
	// This is before the Kubelet pulled the container image(s) for the pod.
	StartTime *unversioned.Time `json:"startTime,omitempty"`

	// The list has one entry per container in the manifest. Each entry is
	// currently the output of `docker inspect`. This output format is *not*
	// final and should not be relied upon.
	// TODO: Make real decisions about what our info should look like. Re-enable fuzz test
	// when we have done this.
	ContainerStatuses []ContainerStatus `json:"containerStatuses,omitempty"`
}

// PodStatusResult is a wrapper for PodStatus returned by kubelet that can be encode/decoded
type PodStatusResult struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`
	// Status represents the current information about a pod. This data may not be up
	// to date.
	Status PodStatus `json:"status,omitempty"`
}

// +genclient=true

// Pod is a collection of containers, used as either input (create, update) or as output (list, get).
type Pod struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the behavior of a pod.
	Spec PodSpec `json:"spec,omitempty"`

	// Status represents the current information about a pod. This data may not be up
	// to date.
	Status PodStatus `json:"status,omitempty"`
}

// PodTemplateSpec describes the data a pod should have when created from a template
type PodTemplateSpec struct {
	// Metadata of the pods created from this template.
	ObjectMeta `json:"metadata,omitempty"`

	// Spec defines the behavior of a pod.
	Spec PodSpec `json:"spec,omitempty"`
}

// +genclient=true

// PodTemplate describes a template for creating copies of a predefined pod.
type PodTemplate struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Template defines the pods that will be created from this pod template
	Template PodTemplateSpec `json:"template,omitempty"`
}

// PodTemplateList is a list of PodTemplates.
type PodTemplateList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []PodTemplate `json:"items"`
}

// ReplicationControllerSpec is the specification of a replication controller.
// As the internal representation of a replication controller, it may have either
// a TemplateRef or a Template set.
type ReplicationControllerSpec struct {
	// Replicas is the number of desired replicas.
	Replicas int `json:"replicas"`

	// Selector is a label query over pods that should match the Replicas count.
	Selector map[string]string `json:"selector"`

	// TemplateRef is a reference to an object that describes the pod that will be created if
	// insufficient replicas are detected. This reference is ignored if a Template is set.
	// Must be set before converting to a versioned API object
	//TemplateRef *ObjectReference `json:"templateRef,omitempty"`

	// Template is the object that describes the pod that will be created if
	// insufficient replicas are detected. Internally, this takes precedence over a
	// TemplateRef.
	Template *PodTemplateSpec `json:"template,omitempty"`
}

// ReplicationControllerStatus represents the current status of a replication
// controller.
type ReplicationControllerStatus struct {
	// Replicas is the number of actual replicas.
	Replicas int `json:"replicas"`

	// ObservedGeneration is the most recent generation observed by the controller.
	ObservedGeneration int64 `json:"observedGeneration,omitempty"`
}

// +genclient=true

// ReplicationController represents the configuration of a replication controller.
type ReplicationController struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the desired behavior of this replication controller.
	Spec ReplicationControllerSpec `json:"spec,omitempty"`

	// Status is the current status of this replication controller. This data may be
	// out of date by some window of time.
	Status ReplicationControllerStatus `json:"status,omitempty"`
}

// ReplicationControllerList is a collection of replication controllers.
type ReplicationControllerList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []ReplicationController `json:"items"`
}

const (
	// ClusterIPNone - do not assign a cluster IP
	// no proxying required and no environment variables should be created for pods
	ClusterIPNone = "None"
)

// ServiceList holds a list of services.
type ServiceList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Service `json:"items"`
}

// Session Affinity Type string
type ServiceAffinity string

const (
	// ServiceAffinityClientIP is the Client IP based.
	ServiceAffinityClientIP ServiceAffinity = "ClientIP"

	// ServiceAffinityNone - no session affinity.
	ServiceAffinityNone ServiceAffinity = "None"
)

// Service Type string describes ingress methods for a service
type ServiceType string

const (
	// ServiceTypeClusterIP means a service will only be accessible inside the
	// cluster, via the ClusterIP.
	ServiceTypeClusterIP ServiceType = "ClusterIP"

	// ServiceTypeNodePort means a service will be exposed on one port of
	// every node, in addition to 'ClusterIP' type.
	ServiceTypeNodePort ServiceType = "NodePort"

	// ServiceTypeLoadBalancer means a service will be exposed via an
	// external load balancer (if the cloud provider supports it), in addition
	// to 'NodePort' type.
	ServiceTypeLoadBalancer ServiceType = "LoadBalancer"
)

// ServiceStatus represents the current status of a service
type ServiceStatus struct {
	// LoadBalancer contains the current status of the load-balancer,
	// if one is present.
	LoadBalancer LoadBalancerStatus `json:"loadBalancer,omitempty"`
}

// LoadBalancerStatus represents the status of a load-balancer
type LoadBalancerStatus struct {
	// Ingress is a list containing ingress points for the load-balancer;
	// traffic intended for the service should be sent to these ingress points.
	Ingress []LoadBalancerIngress `json:"ingress,omitempty"`
}

// LoadBalancerIngress represents the status of a load-balancer ingress point:
// traffic intended for the service should be sent to an ingress point.
type LoadBalancerIngress struct {
	// IP is set for load-balancer ingress points that are IP based
	// (typically GCE or OpenStack load-balancers)
	IP string `json:"ip,omitempty"`

	// Hostname is set for load-balancer ingress points that are DNS based
	// (typically AWS load-balancers)
	Hostname string `json:"hostname,omitempty"`
}

// ServiceSpec describes the attributes that a user creates on a service
type ServiceSpec struct {
	// Type determines how the service will be exposed.  Valid options: ClusterIP, NodePort, LoadBalancer
	Type ServiceType `json:"type,omitempty"`

	// Required: The list of ports that are exposed by this service.
	Ports []ServicePort `json:"ports"`

	// This service will route traffic to pods having labels matching this selector. If empty or not present,
	// the service is assumed to have endpoints set by an external process and Kubernetes will not modify
	// those endpoints.
	Selector map[string]string `json:"selector"`

	// ClusterIP is usually assigned by the master.  If specified by the user
	// we will try to respect it or else fail the request.  This field can
	// not be changed by updates.
	// Valid values are None, empty string (""), or a valid IP address
	// None can be specified for headless services when proxying is not required
	ClusterIP string `json:"clusterIP,omitempty"`

	// ExternalIPs are used by external load balancers, or can be set by
	// users to handle external traffic that arrives at a node.
	ExternalIPs []string `json:"externalIPs,omitempty"`

	// Only applies to Service Type: LoadBalancer
	// LoadBalancer will get created with the IP specified in this field.
	// This feature depends on whether the underlying cloud-provider supports specifying
	// the loadBalancerIP when a load balancer is created.
	// This field will be ignored if the cloud-provider does not support the feature.
	LoadBalancerIP string `json:"loadBalancerIP,omitempty"`

	// Required: Supports "ClientIP" and "None".  Used to maintain session affinity.
	SessionAffinity ServiceAffinity `json:"sessionAffinity,omitempty"`
}

type ServicePort struct {
	// Optional if only one ServicePort is defined on this service: The
	// name of this port within the service.  This must be a DNS_LABEL.
	// All ports within a ServiceSpec must have unique names.  This maps to
	// the 'Name' field in EndpointPort objects.
	Name string `json:"name"`

	// The IP protocol for this port.  Supports "TCP" and "UDP".
	Protocol Protocol `json:"protocol"`

	// The port that will be exposed on the service.
	Port int `json:"port"`

	// Optional: The target port on pods selected by this service.  If this
	// is a string, it will be looked up as a named port in the target
	// Pod's container ports.  If this is not specified, the default value
	// is the sames as the Port field (an identity map).
	TargetPort intstr.IntOrString `json:"targetPort"`

	// The port on each node on which this service is exposed.
	// Default is to auto-allocate a port if the ServiceType of this Service requires one.
	NodePort int `json:"nodePort"`
}

// +genclient=true

// Service is a named abstraction of software service (for example, mysql) consisting of local port
// (for example 3306) that the proxy listens on, and the selector that determines which pods
// will answer requests sent through the proxy.
type Service struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the behavior of a service.
	Spec ServiceSpec `json:"spec,omitempty"`

	// Status represents the current status of a service.
	Status ServiceStatus `json:"status,omitempty"`
}

// +genclient=true

// ServiceAccount binds together:
// * a name, understood by users, and perhaps by peripheral systems, for an identity
// * a principal that can be authenticated and authorized
// * a set of secrets
type ServiceAccount struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Secrets is the list of secrets allowed to be used by pods running using this ServiceAccount
	Secrets []ObjectReference `json:"secrets"`

	// ImagePullSecrets is a list of references to secrets in the same namespace to use for pulling any images
	// in pods that reference this ServiceAccount.  ImagePullSecrets are distinct from Secrets because Secrets
	// can be mounted in the pod, but ImagePullSecrets are only accessed by the kubelet.
	ImagePullSecrets []LocalObjectReference `json:"imagePullSecrets,omitempty"`
}

// ServiceAccountList is a list of ServiceAccount objects
type ServiceAccountList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []ServiceAccount `json:"items"`
}

// +genclient=true

// Endpoints is a collection of endpoints that implement the actual service.  Example:
//   Name: "mysvc",
//   Subsets: [
//     {
//       Addresses: [{"ip": "10.10.1.1"}, {"ip": "10.10.2.2"}],
//       Ports: [{"name": "a", "port": 8675}, {"name": "b", "port": 309}]
//     },
//     {
//       Addresses: [{"ip": "10.10.3.3"}],
//       Ports: [{"name": "a", "port": 93}, {"name": "b", "port": 76}]
//     },
//  ]
type Endpoints struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// The set of all endpoints is the union of all subsets.
	Subsets []EndpointSubset
}

// EndpointSubset is a group of addresses with a common set of ports.  The
// expanded set of endpoints is the Cartesian product of Addresses x Ports.
// For example, given:
//   {
//     Addresses: [{"ip": "10.10.1.1"}, {"ip": "10.10.2.2"}],
//     Ports:     [{"name": "a", "port": 8675}, {"name": "b", "port": 309}]
//   }
// The resulting set of endpoints can be viewed as:
//     a: [ 10.10.1.1:8675, 10.10.2.2:8675 ],
//     b: [ 10.10.1.1:309, 10.10.2.2:309 ]
type EndpointSubset struct {
	Addresses         []EndpointAddress
	NotReadyAddresses []EndpointAddress
	Ports             []EndpointPort
}

// EndpointAddress is a tuple that describes single IP address.
type EndpointAddress struct {
	// The IP of this endpoint.
	// TODO: This should allow hostname or IP, see #4447.
	IP string

	// Optional: The kubernetes object related to the entry point.
	TargetRef *ObjectReference
}

// EndpointPort is a tuple that describes a single port.
type EndpointPort struct {
	// The name of this port (corresponds to ServicePort.Name).  Optional
	// if only one port is defined.  Must be a DNS_LABEL.
	Name string

	// The port number.
	Port int

	// The IP protocol for this port.
	Protocol Protocol
}

// EndpointsList is a list of endpoints.
type EndpointsList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Endpoints `json:"items"`
}

// NodeSpec describes the attributes that a node is created with.
type NodeSpec struct {
	// PodCIDR represents the pod IP range assigned to the node
	// Note: assigning IP ranges to nodes might need to be revisited when we support migratable IPs.
	PodCIDR string `json:"podCIDR,omitempty"`

	// External ID of the node assigned by some machine database (e.g. a cloud provider)
	ExternalID string `json:"externalID,omitempty"`

	// ID of the node assigned by the cloud provider
	// Note: format is "<ProviderName>://<ProviderSpecificNodeID>"
	ProviderID string `json:"providerID,omitempty"`

	// Unschedulable controls node schedulability of new pods. By default node is schedulable.
	Unschedulable bool `json:"unschedulable,omitempty"`
}

// DaemonEndpoint contains information about a single Daemon endpoint.
type DaemonEndpoint struct {
	// Port number of the given endpoint.
	Port int `json:port`
}

// NodeDaemonEndpoints lists ports opened by daemons running on the Node.
type NodeDaemonEndpoints struct {
	// Endpoint on which Kubelet is listening.
	KubeletEndpoint DaemonEndpoint `json:"kubeletEndpoint,omitempty"`
}

// NodeSystemInfo is a set of ids/uuids to uniquely identify the node.
type NodeSystemInfo struct {
	// Machine ID reported by the node.
	MachineID string `json:"machineID"`
	// System UUID reported by the node.
	SystemUUID string `json:"systemUUID"`
	// Boot ID reported by the node.
	BootID string `json:"bootID"`
	// Kernel Version reported by the node.
	KernelVersion string `json:"kernelVersion"`
	// OS Image reported by the node.
	OSImage string `json:"osImage"`
	// ContainerRuntime Version reported by the node.
	ContainerRuntimeVersion string `json:"containerRuntimeVersion"`
	// Kubelet Version reported by the node.
	KubeletVersion string `json:"kubeletVersion"`
	// KubeProxy Version reported by the node.
	KubeProxyVersion string `json:"kubeProxyVersion"`
}

// NodeStatus is information about the current status of a node.
type NodeStatus struct {
	// Capacity represents the total resources of a node.
	Capacity ResourceList `json:"capacity,omitempty"`
	// Allocatable represents the resources of a node that are available for scheduling.
	Allocatable ResourceList `json:"allocatable,omitempty"`
	// NodePhase is the current lifecycle phase of the node.
	Phase NodePhase `json:"phase,omitempty"`
	// Conditions is an array of current node conditions.
	Conditions []NodeCondition `json:"conditions,omitempty"`
	// Queried from cloud provider, if available.
	Addresses []NodeAddress `json:"addresses,omitempty"`
	// Endpoints of daemons running on the Node.
	DaemonEndpoints NodeDaemonEndpoints `json:"daemonEndpoints,omitempty"`
	// Set of ids/uuids to uniquely identify the node.
	NodeInfo NodeSystemInfo `json:"nodeInfo,omitempty"`
	// List of container images on this node
	Images []ContainerImage `json:"images",omitempty`
}

// Describe a container image
type ContainerImage struct {
	// Names by which this image is known.
	Names []string `json:"names"`
	// The size of the image in bytes.
	SizeBytes int64 `json:"sizeBytes,omitempty"`
}

type NodePhase string

// These are the valid phases of node.
const (
	// NodePending means the node has been created/added by the system, but not configured.
	NodePending NodePhase = "Pending"
	// NodeRunning means the node has been configured and has Kubernetes components running.
	NodeRunning NodePhase = "Running"
	// NodeTerminated means the node has been removed from the cluster.
	NodeTerminated NodePhase = "Terminated"
)

type NodeConditionType string

// These are valid conditions of node. Currently, we don't have enough information to decide
// node condition. In the future, we will add more. The proposed set of conditions are:
// NodeReady, NodeReachable
const (
	// NodeReady means kubelet is healthy and ready to accept pods.
	NodeReady NodeConditionType = "Ready"
	// NodeOutOfDisk means the kubelet will not accept new pods due to insufficient free disk
	// space on the node.
	NodeOutOfDisk NodeConditionType = "OutOfDisk"
)

type NodeCondition struct {
	Type               NodeConditionType `json:"type"`
	Status             ConditionStatus   `json:"status"`
	LastHeartbeatTime  unversioned.Time  `json:"lastHeartbeatTime,omitempty"`
	LastTransitionTime unversioned.Time  `json:"lastTransitionTime,omitempty"`
	Reason             string            `json:"reason,omitempty"`
	Message            string            `json:"message,omitempty"`
}

type NodeAddressType string

// These are valid address types of node. NodeLegacyHostIP is used to transit
// from out-dated HostIP field to NodeAddress.
const (
	NodeLegacyHostIP NodeAddressType = "LegacyHostIP"
	NodeHostName     NodeAddressType = "Hostname"
	NodeExternalIP   NodeAddressType = "ExternalIP"
	NodeInternalIP   NodeAddressType = "InternalIP"
)

type NodeAddress struct {
	Type    NodeAddressType `json:"type"`
	Address string          `json:"address"`
}

// NodeResources is an object for conveying resource information about a node.
// see http://releases.k8s.io/HEAD/docs/design/resources.md for more details.
type NodeResources struct {
	// Capacity represents the available resources of a node
	Capacity ResourceList `json:"capacity,omitempty"`
}

// ResourceName is the name identifying various resources in a ResourceList.
type ResourceName string

const (
	// CPU, in cores. (500m = .5 cores)
	ResourceCPU ResourceName = "cpu"
	// Memory, in bytes. (500Gi = 500GiB = 500 * 1024 * 1024 * 1024)
	ResourceMemory ResourceName = "memory"
	// Volume size, in bytes (e,g. 5Gi = 5GiB = 5 * 1024 * 1024 * 1024)
	ResourceStorage ResourceName = "storage"
	// Number of Pods that may be running on this Node: see ResourcePods
)

// ResourceList is a set of (resource name, quantity) pairs.
type ResourceList map[ResourceName]resource.Quantity

// +genclient=true,nonNamespaced=true

// Node is a worker node in Kubernetes
// The name of the node according to etcd is in ObjectMeta.Name.
type Node struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the behavior of a node.
	Spec NodeSpec `json:"spec,omitempty"`

	// Status describes the current status of a Node
	Status NodeStatus `json:"status,omitempty"`
}

// NodeList is a list of nodes.
type NodeList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Node `json:"items"`
}

// NamespaceSpec describes the attributes on a Namespace
type NamespaceSpec struct {
	// Finalizers is an opaque list of values that must be empty to permanently remove object from storage
	Finalizers []FinalizerName
}

type FinalizerName string

// These are internal finalizer values to Kubernetes, must be qualified name unless defined here
const (
	FinalizerKubernetes FinalizerName = "kubernetes"
)

// NamespaceStatus is information about the current status of a Namespace.
type NamespaceStatus struct {
	// Phase is the current lifecycle phase of the namespace.
	Phase NamespacePhase `json:"phase,omitempty"`
}

type NamespacePhase string

// These are the valid phases of a namespace.
const (
	// NamespaceActive means the namespace is available for use in the system
	NamespaceActive NamespacePhase = "Active"
	// NamespaceTerminating means the namespace is undergoing graceful termination
	NamespaceTerminating NamespacePhase = "Terminating"
)

// +genclient=true,nonNamespaced=true

// A namespace provides a scope for Names.
// Use of multiple namespaces is optional
type Namespace struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the behavior of the Namespace.
	Spec NamespaceSpec `json:"spec,omitempty"`

	// Status describes the current status of a Namespace
	Status NamespaceStatus `json:"status,omitempty"`
}

// NamespaceList is a list of Namespaces.
type NamespaceList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Namespace `json:"items"`
}

// Binding ties one object to another - for example, a pod is bound to a node by a scheduler.
type Binding struct {
	unversioned.TypeMeta `json:",inline"`
	// ObjectMeta describes the object that is being bound.
	ObjectMeta `json:"metadata,omitempty"`

	// Target is the object to bind to.
	Target ObjectReference `json:"target"`
}

// DeleteOptions may be provided when deleting an API object
type DeleteOptions struct {
	unversioned.TypeMeta `json:",inline"`

	// Optional duration in seconds before the object should be deleted. Value must be non-negative integer.
	// The value zero indicates delete immediately. If this value is nil, the default grace period for the
	// specified type will be used.
	GracePeriodSeconds *int64 `json:"gracePeriodSeconds"`
}

// ExportOptions is the query options to the standard REST get call.
type ExportOptions struct {
	unversioned.TypeMeta `json:",inline"`
	// Should this value be exported.  Export strips fields that a user can not specify.
	Export bool `json:"export"`
	// Should the export be exact.  Exact export maintains cluster-specific fields like 'Namespace'
	Exact bool `json:"exact"`
}

// ListOptions is the query options to a standard REST list call, and has future support for
// watch calls.
type ListOptions struct {
	unversioned.TypeMeta `json:",inline"`

	// A selector based on labels
	LabelSelector labels.Selector
	// A selector based on fields
	FieldSelector fields.Selector
	// If true, watch for changes to this list
	Watch bool
	// The resource version to watch (no effect on list yet)
	ResourceVersion string
	// Timeout for the list/watch call.
	TimeoutSeconds *int64
}

// PodLogOptions is the query options for a Pod's logs REST call
type PodLogOptions struct {
	unversioned.TypeMeta

	// Container for which to return logs
	Container string
	// If true, follow the logs for the pod
	Follow bool
	// If true, return previous terminated container logs
	Previous bool
	// A relative time in seconds before the current time from which to show logs. If this value
	// precedes the time a pod was started, only logs since the pod start will be returned.
	// If this value is in the future, no logs will be returned.
	// Only one of sinceSeconds or sinceTime may be specified.
	SinceSeconds *int64
	// An RFC3339 timestamp from which to show logs. If this value
	// precedes the time a pod was started, only logs since the pod start will be returned.
	// If this value is in the future, no logs will be returned.
	// Only one of sinceSeconds or sinceTime may be specified.
	SinceTime *unversioned.Time
	// If true, add an RFC3339 or RFC3339Nano timestamp at the beginning of every line
	// of log output.
	Timestamps bool
	// If set, the number of lines from the end of the logs to show. If not specified,
	// logs are shown from the creation of the container or sinceSeconds or sinceTime
	TailLines *int64
	// If set, the number of bytes to read from the server before terminating the
	// log output. This may not display a complete final line of logging, and may return
	// slightly more or slightly less than the specified limit.
	LimitBytes *int64
}

// PodAttachOptions is the query options to a Pod's remote attach call
// TODO: merge w/ PodExecOptions below for stdin, stdout, etc
type PodAttachOptions struct {
	unversioned.TypeMeta `json:",inline"`

	// Stdin if true indicates that stdin is to be redirected for the attach call
	Stdin bool `json:"stdin,omitempty"`

	// Stdout if true indicates that stdout is to be redirected for the attach call
	Stdout bool `json:"stdout,omitempty"`

	// Stderr if true indicates that stderr is to be redirected for the attach call
	Stderr bool `json:"stderr,omitempty"`

	// TTY if true indicates that a tty will be allocated for the attach call
	TTY bool `json:"tty,omitempty"`

	// Container to attach to.
	Container string `json:"container,omitempty"`
}

// PodExecOptions is the query options to a Pod's remote exec call
type PodExecOptions struct {
	unversioned.TypeMeta

	// Stdin if true indicates that stdin is to be redirected for the exec call
	Stdin bool

	// Stdout if true indicates that stdout is to be redirected for the exec call
	Stdout bool

	// Stderr if true indicates that stderr is to be redirected for the exec call
	Stderr bool

	// TTY if true indicates that a tty will be allocated for the exec call
	TTY bool

	// Container in which to execute the command.
	Container string

	// Command is the remote command to execute; argv array; not executed within a shell.
	Command []string
}

// PodProxyOptions is the query options to a Pod's proxy call
type PodProxyOptions struct {
	unversioned.TypeMeta

	// Path is the URL path to use for the current proxy request
	Path string
}

// NodeProxyOptions is the query options to a Node's proxy call
type NodeProxyOptions struct {
	unversioned.TypeMeta

	// Path is the URL path to use for the current proxy request
	Path string
}

// ServiceProxyOptions is the query options to a Service's proxy call.
type ServiceProxyOptions struct {
	unversioned.TypeMeta

	// Path is the part of URLs that include service endpoints, suffixes,
	// and parameters to use for the current proxy request to service.
	// For example, the whole request URL is
	// http://localhost/api/v1/namespaces/kube-system/services/elasticsearch-logging/_search?q=user:kimchy.
	// Path is _search?q=user:kimchy.
	Path string
}

// ObjectReference contains enough information to let you inspect or modify the referred object.
type ObjectReference struct {
	Kind            string    `json:"kind,omitempty"`
	Namespace       string    `json:"namespace,omitempty"`
	Name            string    `json:"name,omitempty"`
	UID             types.UID `json:"uid,omitempty"`
	APIVersion      string    `json:"apiVersion,omitempty"`
	ResourceVersion string    `json:"resourceVersion,omitempty"`

	// Optional. If referring to a piece of an object instead of an entire object, this string
	// should contain information to identify the sub-object. For example, if the object
	// reference is to a container within a pod, this would take on a value like:
	// "spec.containers{name}" (where "name" refers to the name of the container that triggered
	// the event) or if no container name is specified "spec.containers[2]" (container with
	// index 2 in this pod). This syntax is chosen only to have some well-defined way of
	// referencing a part of an object.
	// TODO: this design is not final and this field is subject to change in the future.
	FieldPath string `json:"fieldPath,omitempty"`
}

// LocalObjectReference contains enough information to let you locate the referenced object inside the same namespace.
type LocalObjectReference struct {
	//TODO: Add other useful fields.  apiVersion, kind, uid?
	Name string
}

type SerializedReference struct {
	unversioned.TypeMeta `json:",inline"`
	Reference            ObjectReference `json:"reference,omitempty"`
}

type EventSource struct {
	// Component from which the event is generated.
	Component string `json:"component,omitempty"`
	// Host name on which the event is generated.
	Host string `json:"host,omitempty"`
}

// Valid values for event types (new types could be added in future)
const (
	// Information only and will not cause any problems
	EventTypeNormal string = "Normal"
	// These events are to warn that something might go wrong
	EventTypeWarning string = "Warning"
)

// +genclient=true

// Event is a report of an event somewhere in the cluster.
// TODO: Decide whether to store these separately or with the object they apply to.
type Event struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Required. The object that this event is about.
	InvolvedObject ObjectReference `json:"involvedObject,omitempty"`

	// Optional; this should be a short, machine understandable string that gives the reason
	// for this event being generated. For example, if the event is reporting that a container
	// can't start, the Reason might be "ImageNotFound".
	// TODO: provide exact specification for format.
	Reason string `json:"reason,omitempty"`

	// Optional. A human-readable description of the status of this operation.
	// TODO: decide on maximum length.
	Message string `json:"message,omitempty"`

	// Optional. The component reporting this event. Should be a short machine understandable string.
	Source EventSource `json:"source,omitempty"`

	// The time at which the event was first recorded. (Time of server receipt is in TypeMeta.)
	FirstTimestamp unversioned.Time `json:"firstTimestamp,omitempty"`

	// The time at which the most recent occurrence of this event was recorded.
	LastTimestamp unversioned.Time `json:"lastTimestamp,omitempty"`

	// The number of times this event has occurred.
	Count int `json:"count,omitempty"`

	// Type of this event (Normal, Warning), new types could be added in the future.
	Type string `json:"type,omitempty"`
}

// EventList is a list of events.
type EventList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Event `json:"items"`
}

// List holds a list of objects, which may not be known by the server.
type List struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []runtime.Object `json:"items"`
}

// A type of object that is limited
type LimitType string

const (
	// Limit that applies to all pods in a namespace
	LimitTypePod LimitType = "Pod"
	// Limit that applies to all containers in a namespace
	LimitTypeContainer LimitType = "Container"
)

// LimitRangeItem defines a min/max usage limit for any resource that matches on kind
type LimitRangeItem struct {
	// Type of resource that this limit applies to
	Type LimitType `json:"type,omitempty"`
	// Max usage constraints on this kind by resource name
	Max ResourceList `json:"max,omitempty"`
	// Min usage constraints on this kind by resource name
	Min ResourceList `json:"min,omitempty"`
	// Default resource requirement limit value by resource name.
	Default ResourceList `json:"default,omitempty"`
	// DefaultRequest resource requirement request value by resource name.
	DefaultRequest ResourceList `json:"defaultRequest,omitempty"`
	// MaxLimitRequestRatio represents the max burst value for the named resource
	MaxLimitRequestRatio ResourceList `json:"maxLimitRequestRatio,omitempty"`
}

// LimitRangeSpec defines a min/max usage limit for resources that match on kind
type LimitRangeSpec struct {
	// Limits is the list of LimitRangeItem objects that are enforced
	Limits []LimitRangeItem `json:"limits"`
}

// +genclient=true

// LimitRange sets resource usage limits for each kind of resource in a Namespace
type LimitRange struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the limits enforced
	Spec LimitRangeSpec `json:"spec,omitempty"`
}

// LimitRangeList is a list of LimitRange items.
type LimitRangeList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	// Items is a list of LimitRange objects
	Items []LimitRange `json:"items"`
}

// The following identify resource constants for Kubernetes object types
const (
	// Pods, number
	ResourcePods ResourceName = "pods"
	// Services, number
	ResourceServices ResourceName = "services"
	// ReplicationControllers, number
	ResourceReplicationControllers ResourceName = "replicationcontrollers"
	// ResourceQuotas, number
	ResourceQuotas ResourceName = "resourcequotas"
	// ResourceSecrets, number
	ResourceSecrets ResourceName = "secrets"
	// ResourcePersistentVolumeClaims, number
	ResourcePersistentVolumeClaims ResourceName = "persistentvolumeclaims"
)

// ResourceQuotaSpec defines the desired hard limits to enforce for Quota
type ResourceQuotaSpec struct {
	// Hard is the set of desired hard limits for each named resource
	Hard ResourceList `json:"hard,omitempty"`
}

// ResourceQuotaStatus defines the enforced hard limits and observed use
type ResourceQuotaStatus struct {
	// Hard is the set of enforced hard limits for each named resource
	Hard ResourceList `json:"hard,omitempty"`
	// Used is the current observed total usage of the resource in the namespace
	Used ResourceList `json:"used,omitempty"`
}

// +genclient=true

// ResourceQuota sets aggregate quota restrictions enforced per namespace
type ResourceQuota struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Spec defines the desired quota
	Spec ResourceQuotaSpec `json:"spec,omitempty"`

	// Status defines the actual enforced quota and its current usage
	Status ResourceQuotaStatus `json:"status,omitempty"`
}

// ResourceQuotaList is a list of ResourceQuota items
type ResourceQuotaList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	// Items is a list of ResourceQuota objects
	Items []ResourceQuota `json:"items"`
}

// +genclient=true

// Secret holds secret data of a certain type.  The total bytes of the values in
// the Data field must be less than MaxSecretSize bytes.
type Secret struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Data contains the secret data.  Each key must be a valid DNS_SUBDOMAIN
	// or leading dot followed by valid DNS_SUBDOMAIN.
	// The serialized form of the secret data is a base64 encoded string,
	// representing the arbitrary (possibly non-string) data value here.
	Data map[string][]byte `json:"data,omitempty"`

	// Used to facilitate programmatic handling of secret data.
	Type SecretType `json:"type,omitempty"`
}

const MaxSecretSize = 1 * 1024 * 1024

type SecretType string

const (
	// SecretTypeOpaque is the default; arbitrary user-defined data
	SecretTypeOpaque SecretType = "Opaque"

	// SecretTypeServiceAccountToken contains a token that identifies a service account to the API
	//
	// Required fields:
	// - Secret.Annotations["kubernetes.io/service-account.name"] - the name of the ServiceAccount the token identifies
	// - Secret.Annotations["kubernetes.io/service-account.uid"] - the UID of the ServiceAccount the token identifies
	// - Secret.Data["token"] - a token that identifies the service account to the API
	SecretTypeServiceAccountToken SecretType = "kubernetes.io/service-account-token"

	// ServiceAccountNameKey is the key of the required annotation for SecretTypeServiceAccountToken secrets
	ServiceAccountNameKey = "kubernetes.io/service-account.name"
	// ServiceAccountUIDKey is the key of the required annotation for SecretTypeServiceAccountToken secrets
	ServiceAccountUIDKey = "kubernetes.io/service-account.uid"
	// ServiceAccountTokenKey is the key of the required data for SecretTypeServiceAccountToken secrets
	ServiceAccountTokenKey = "token"
	// ServiceAccountKubeconfigKey is the key of the optional kubeconfig data for SecretTypeServiceAccountToken secrets
	ServiceAccountKubeconfigKey = "kubernetes.kubeconfig"
	// ServiceAccountRootCAKey is the key of the optional root certificate authority for SecretTypeServiceAccountToken secrets
	ServiceAccountRootCAKey = "ca.crt"
	// ServiceAccountNamespaceKey is the key of the optional namespace to use as the default for namespaced API calls
	ServiceAccountNamespaceKey = "namespace"

	// SecretTypeDockercfg contains a dockercfg file that follows the same format rules as ~/.dockercfg
	//
	// Required fields:
	// - Secret.Data[".dockercfg"] - a serialized ~/.dockercfg file
	SecretTypeDockercfg SecretType = "kubernetes.io/dockercfg"

	// DockerConfigKey is the key of the required data for SecretTypeDockercfg secrets
	DockerConfigKey = ".dockercfg"

	// SecretTypeDockerConfigJson contains a dockercfg file that follows the same format rules as ~/.docker/config.json
	//
	// Required fields:
	// - Secret.Data[".dockerconfigjson"] - a serialized ~/.docker/config.json file
	SecretTypeDockerConfigJson SecretType = "kubernetes.io/dockerconfigjson"

	// DockerConfigJsonKey is the key of the required data for SecretTypeDockerConfigJson secrets
	DockerConfigJsonKey = ".dockerconfigjson"

	// SecretTypeBasicAuth contains data needed for basic authentication.
	//
	// Required at least one of fields:
	// - Secret.Data["username"] - username used for authentication
	// - Secret.Data["password"] - password or token needed for authentication
	SecretTypeBasicAuth SecretType = "kubernetes.io/basic-auth"

	// BasicAuthUsernameKey is the key of the username for SecretTypeBasicAuth secrets
	BasicAuthUsernameKey = "username"
	// BasicAuthPasswordKey is the key of the password or token for SecretTypeBasicAuth secrets
	BasicAuthPasswordKey = "password"

	// SecretTypeSSHAuth contains data needed for SSH authetication.
	//
	// Required field:
	// - Secret.Data["ssh-privatekey"] - private SSH key needed for authentication
	SecretTypeSSHAuth SecretType = "kubernetes.io/ssh-auth"

	// SSHAuthPrivateKey is the key of the required SSH private key for SecretTypeSSHAuth secrets
	SSHAuthPrivateKey = "ssh-privatekey"

	// SecretTypeTLS contains information about a TLS client or server secret. It
	// is primarily used with TLS termination of the Ingress resource, but may be
	// used in other types.
	//
	// Required fields:
	// - Secret.Data["tls.key"] - TLS private key.
	//   Secret.Data["tls.crt"] - TLS certificate.
	// TODO: Consider supporting different formats, specifying CA/destinationCA.
	SecretTypeTLS SecretType = "kubernetes.io/tls"

	// TLSCertKey is the key for tls certificates in a TLS secert.
	TLSCertKey = "tls.crt"
	// TLSPrivateKeyKey is the key for the private key field in a TLS secret.
	TLSPrivateKeyKey = "tls.key"
)

type SecretList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []Secret `json:"items"`
}

// +genclient=true

// ConfigMap holds configuration data for components or applications to consume.
type ConfigMap struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	// Data contains the configuration data.
	// Each key must be a valid DNS_SUBDOMAIN with an optional leading dot.
	Data map[string]string `json:"data,omitempty"`
}

// ConfigMapList is a resource containing a list of ConfigMap objects.
type ConfigMapList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	// Items is the list of ConfigMaps.
	Items []ConfigMap `json:"items,omitempty"`
}

// These constants are for remote command execution and port forwarding and are
// used by both the client side and server side components.
//
// This is probably not the ideal place for them, but it didn't seem worth it
// to create pkg/exec and pkg/portforward just to contain a single file with
// constants in it.  Suggestions for more appropriate alternatives are
// definitely welcome!
const (
	// Enable stdin for remote command execution
	ExecStdinParam = "input"
	// Enable stdout for remote command execution
	ExecStdoutParam = "output"
	// Enable stderr for remote command execution
	ExecStderrParam = "error"
	// Enable TTY for remote command execution
	ExecTTYParam = "tty"
	// Command to run for remote command execution
	ExecCommandParamm = "command"

	// Name of header that specifies stream type
	StreamType = "streamType"
	// Value for streamType header for stdin stream
	StreamTypeStdin = "stdin"
	// Value for streamType header for stdout stream
	StreamTypeStdout = "stdout"
	// Value for streamType header for stderr stream
	StreamTypeStderr = "stderr"
	// Value for streamType header for data stream
	StreamTypeData = "data"
	// Value for streamType header for error stream
	StreamTypeError = "error"

	// Name of header that specifies the port being forwarded
	PortHeader = "port"
	// Name of header that specifies a request ID used to associate the error
	// and data streams for a single forwarded connection
	PortForwardRequestIDHeader = "requestID"
)

// Similarly to above, these are constants to support HTTP PATCH utilized by
// both the client and server that didn't make sense for a whole package to be
// dedicated to.
type PatchType string

const (
	JSONPatchType           PatchType = "application/json-patch+json"
	MergePatchType          PatchType = "application/merge-patch+json"
	StrategicMergePatchType PatchType = "application/strategic-merge-patch+json"
)

// Type and constants for component health validation.
type ComponentConditionType string

// These are the valid conditions for the component.
const (
	ComponentHealthy ComponentConditionType = "Healthy"
)

type ComponentCondition struct {
	Type    ComponentConditionType `json:"type"`
	Status  ConditionStatus        `json:"status"`
	Message string                 `json:"message,omitempty"`
	Error   string                 `json:"error,omitempty"`
}

// +genclient=true,nonNamespaced=true

// ComponentStatus (and ComponentStatusList) holds the cluster validation info.
type ComponentStatus struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`

	Conditions []ComponentCondition `json:"conditions,omitempty"`
}

type ComponentStatusList struct {
	unversioned.TypeMeta `json:",inline"`
	unversioned.ListMeta `json:"metadata,omitempty"`

	Items []ComponentStatus `json:"items"`
}

// SecurityContext holds security configuration that will be applied to a container.
// Some fields are present in both SecurityContext and PodSecurityContext.  When both
// are set, the values in SecurityContext take precedence.
type SecurityContext struct {
	// The capabilities to add/drop when running containers.
	// Defaults to the default set of capabilities granted by the container runtime.
	Capabilities *Capabilities `json:"capabilities,omitempty"`
	// Run container in privileged mode.
	// Processes in privileged containers are essentially equivalent to root on the host.
	// Defaults to false.
	Privileged *bool `json:"privileged,omitempty"`
	// The SELinux context to be applied to the container.
	// If unspecified, the container runtime will allocate a random SELinux context for each
	// container.  May also be set in PodSecurityContext.  If set in both SecurityContext and
	// PodSecurityContext, the value specified in SecurityContext takes precedence.
	SELinuxOptions *SELinuxOptions `json:"seLinuxOptions,omitempty"`
	// The UID to run the entrypoint of the container process.
	// Defaults to user specified in image metadata if unspecified.
	// May also be set in PodSecurityContext.  If set in both SecurityContext and
	// PodSecurityContext, the value specified in SecurityContext takes precedence.
	RunAsUser *int64 `json:"runAsUser,omitempty"`
	// Indicates that the container must run as a non-root user.
	// If true, the Kubelet will validate the image at runtime to ensure that it
	// does not run as UID 0 (root) and fail to start the container if it does.
	// If unset or false, no such validation will be performed.
	// May also be set in PodSecurityContext.  If set in both SecurityContext and
	// PodSecurityContext, the value specified in SecurityContext takes precedence.
	RunAsNonRoot *bool `json:"runAsNonRoot,omitempty"`
	// The read-only root filesystem allows you to restrict the locations that an application can write
	// files to, ensuring the persistent data can only be written to mounts.
	ReadOnlyRootFilesystem *bool `json:"readOnlyRootFilesystem,omitempty"`
}

// SELinuxOptions are the labels to be applied to the container.
type SELinuxOptions struct {
	// SELinux user label
	User string `json:"user,omitempty"`
	// SELinux role label
	Role string `json:"role,omitempty"`
	// SELinux type label
	Type string `json:"type,omitempty"`
	// SELinux level label.
	Level string `json:"level,omitempty"`
}

// RangeAllocation is an opaque API object (not exposed to end users) that can be persisted to record
// the global allocation state of the cluster. The schema of Range and Data generic, in that Range
// should be a string representation of the inputs to a range (for instance, for IP allocation it
// might be a CIDR) and Data is an opaque blob understood by an allocator which is typically a
// binary range.  Consumers should use annotations to record additional information (schema version,
// data encoding hints). A range allocation should *ALWAYS* be recreatable at any time by observation
// of the cluster, thus the object is less strongly typed than most.
type RangeAllocation struct {
	unversioned.TypeMeta `json:",inline"`
	ObjectMeta           `json:"metadata,omitempty"`
	// A string representing a unique label for a range of resources, such as a CIDR "10.0.0.0/8" or
	// port range "10000-30000". Range is not strongly schema'd here. The Range is expected to define
	// a start and end unless there is an implicit end.
	Range string `json:"range"`
	// A byte array representing the serialized state of a range allocation. Additional clarifiers on
	// the type or format of data should be represented with annotations. For IP allocations, this is
	// represented as a bit array starting at the base IP of the CIDR in Range, with each bit representing
	// a single allocated address (the fifth bit on CIDR 10.0.0.0/8 is 10.0.0.4).
	Data []byte `json:"data"`
}

const (
	// "default-scheduler" is the name of default scheduler.
	DefaultSchedulerName = "default-scheduler"
)