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types.go
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types.go
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/*
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.
// Populated by the system. Read-only.
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"`
// List of objects depended by this object. If ALL objects in the list have
// been deleted, this object will be garbage collected. If this object is managed by a controller,
// then an entry in this list will point to this controller, with the controller field set to true.
// There cannot be more than one managing controller.
OwnerReferences []OwnerReference `json:"ownerReferences,omitempty"`
// Must be empty before the object is deleted from the registry. Each entry
// is an identifier for the responsible component that will remove the entry
// from the list. If the deletionTimestamp of the object is non-nil, entries
// in this list can only be removed.
Finalizers []string `json:"finalizers,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"`
// VsphereVolume represents a vSphere volume attached and mounted on kubelets host machine
VsphereVolume *VsphereVirtualDiskVolumeSource `json:"vsphereVolume,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"`
// VsphereVolume represents a vSphere volume attached and mounted on kubelets host machine
VsphereVolume *VsphereVirtualDiskVolumeSource `json:"vsphereVolume,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 be 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"`
// A label query over volumes to consider for binding
Selector *unversioned.LabelSelector `json:"selector,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"
// used for PersistentVolumeClaims that lost their underlying
// PersistentVolume. The claim was bound to a PersistentVolume and this
// volume does not exist any longer and all data on it was lost.
ClaimLost PersistentVolumeClaimPhase = "Lost"
)
// 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 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 or read-only many times. 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 int32 `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 int32 `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 *int32 `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 secret object containing
// sensitive information to pass to the plugin scripts. This may be
// empty if no secret object is specified. If the secret object
// contains more than one secret, all secrets are passed to the plugin
// scripts.
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 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 int32 `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"`
// If unspecified, each key-value pair in the Data field of the referenced
// Secret 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 Secret,
// the volume setup will error. Paths must be relative and may not contain
// the '..' path or start with '..'.
Items []KeyToPath `json:"items,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 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,omitempty"`
// Selects a resource of the container: only resources limits and requests
// (limits.cpu, limits.memory, requests.cpu and requests.memory) are currently supported.
ResourceFieldRef *ResourceFieldSelector `json:"resourceFieldRef,omitempty"`
}
// 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"`
}
// Represents a vSphere volume resource.
type VsphereVirtualDiskVolumeSource struct {
// Path that identifies vSphere volume vmdk
VolumePath string `json:"volumePath"`
// 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"`
}
// 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 int32 `json:"hostPort,omitempty"`
// Required: This must be a valid port number, 0 < x < 65536.
ContainerPort int32 `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. Must not contain ':'.
MountPath string `json:"mountPath"`
// Path within the volume from which the container's volume should be mounted.
// Defaults to "" (volume's root).
SubPath string `json:"subPath,omitempty"`
}
// 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 resource of the container: only resources limits and requests
// (limits.cpu, limits.memory, requests.cpu and requests.memory) are currently supported.
ResourceFieldRef *ResourceFieldSelector `json:"resourceFieldRef,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"`
}
// ResourceFieldSelector represents container resources (cpu, memory) and their output format
type ResourceFieldSelector struct {
// Container name: required for volumes, optional for env vars
ContainerName string `json:"containerName,omitempty"`
// Required: resource to select
Resource string `json:"resource"`
// Specifies the output format of the exposed resources, defaults to "1"
Divisor resource.Quantity `json:"divisor,omitempty"`
}
// 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 int32 `json:"initialDelaySeconds,omitempty"`
// Length of time before health checking times out. In seconds.
TimeoutSeconds int32 `json:"timeoutSeconds,omitempty"`
// How often (in seconds) to perform the probe.
PeriodSeconds int32 `json:"periodSeconds,omitempty"`
// Minimum consecutive successes for the probe to be considered successful after having failed.
// Must be 1 for liveness.
SuccessThreshold int32 `json:"successThreshold,omitempty"`
// Minimum consecutive failures for the probe to be considered failed after having succeeded.
FailureThreshold int32 `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"`