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types.go
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/*
Copyright 2014 The Kubernetes Authors.
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 core
import (
"k8s.io/apimachinery/pkg/api/resource"
metainternalversion "k8s.io/apimachinery/pkg/apis/meta/internalversion"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/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.
// DEPRECATED: Use k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta instead - this type will be removed soon.
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.
// +optional
Name string
// 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).
// +optional
GenerateName string
// 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.
// +optional
Namespace string
// SelfLink is a URL representing this object.
// +optional
SelfLink string
// 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.
// +optional
UID types.UID
// 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.
// +optional
ResourceVersion string
// A sequence number representing a specific generation of the desired state.
// Populated by the system. Read-only.
// +optional
Generation int64
// 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.
// +optional
CreationTimestamp metav1.Time
// DeletionTimestamp is RFC 3339 date and time at 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 is expected to 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. After that 30 seconds, the Kubelet will send a hard
// termination signal (SIGKILL) to the container and after cleanup, remove the pod from the
// API. In the presence of network partitions, this object may still exist after this
// timestamp, until an administrator or automated process can determine the resource is
// fully terminated.
// If not set, graceful deletion of the object has not been requested.
//
// Populated by the system when a graceful deletion is requested.
// Read-only.
// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
// +optional
DeletionTimestamp *metav1.Time
// 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.
// +optional
DeletionGracePeriodSeconds *int64
// 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.
// +optional
Labels map[string]string
// 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.
// +optional
Annotations map[string]string
// 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.
// +optional
OwnerReferences []metav1.OwnerReference
// An initializer is a controller which enforces some system invariant at object creation time.
// This field is a list of initializers that have not yet acted on this object. If nil or empty,
// this object has been completely initialized. Otherwise, the object is considered uninitialized
// and is hidden (in list/watch and get calls) from clients that haven't explicitly asked to
// observe uninitialized objects.
//
// When an object is created, the system will populate this list with the current set of initializers.
// Only privileged users may set or modify this list. Once it is empty, it may not be modified further
// by any user.
Initializers *metav1.Initializers
// 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.
// +optional
Finalizers []string
// The name of the cluster which the object belongs to.
// This is used to distinguish resources with same name and namespace in different clusters.
// This field is not set anywhere right now and apiserver is going to ignore it if set in create or update request.
// +optional
ClusterName string
}
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"
// NamespacePublic is the namespace where we place public info (ConfigMaps)
NamespacePublic string = "kube-public"
// 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
// 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.
// +optional
VolumeSource
}
// 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.
// +optional
HostPath *HostPathVolumeSource
// EmptyDir represents a temporary directory that shares a pod's lifetime.
// +optional
EmptyDir *EmptyDirVolumeSource
// GCEPersistentDisk represents a GCE Disk resource that is attached to a
// kubelet's host machine and then exposed to the pod.
// +optional
GCEPersistentDisk *GCEPersistentDiskVolumeSource
// AWSElasticBlockStore represents an AWS EBS disk that is attached to a
// kubelet's host machine and then exposed to the pod.
// +optional
AWSElasticBlockStore *AWSElasticBlockStoreVolumeSource
// GitRepo represents a git repository at a particular revision.
// +optional
GitRepo *GitRepoVolumeSource
// Secret represents a secret that should populate this volume.
// +optional
Secret *SecretVolumeSource
// NFS represents an NFS mount on the host that shares a pod's lifetime
// +optional
NFS *NFSVolumeSource
// ISCSIVolumeSource represents an ISCSI Disk resource that is attached to a
// kubelet's host machine and then exposed to the pod.
// +optional
ISCSI *ISCSIVolumeSource
// Glusterfs represents a Glusterfs mount on the host that shares a pod's lifetime
// +optional
Glusterfs *GlusterfsVolumeSource
// PersistentVolumeClaimVolumeSource represents a reference to a PersistentVolumeClaim in the same namespace
// +optional
PersistentVolumeClaim *PersistentVolumeClaimVolumeSource
// RBD represents a Rados Block Device mount on the host that shares a pod's lifetime
// +optional
RBD *RBDVolumeSource
// Quobyte represents a Quobyte mount on the host that shares a pod's lifetime
// +optional
Quobyte *QuobyteVolumeSource
// FlexVolume represents a generic volume resource that is
// provisioned/attached using an exec based plugin. This is an alpha feature and may change in future.
// +optional
FlexVolume *FlexVolumeSource
// Cinder represents a cinder volume attached and mounted on kubelets host machine
// +optional
Cinder *CinderVolumeSource
// CephFS represents a Cephfs mount on the host that shares a pod's lifetime
// +optional
CephFS *CephFSVolumeSource
// Flocker represents a Flocker volume attached to a kubelet's host machine. This depends on the Flocker control service being running
// +optional
Flocker *FlockerVolumeSource
// DownwardAPI represents metadata about the pod that should populate this volume
// +optional
DownwardAPI *DownwardAPIVolumeSource
// FC represents a Fibre Channel resource that is attached to a kubelet's host machine and then exposed to the pod.
// +optional
FC *FCVolumeSource
// AzureFile represents an Azure File Service mount on the host and bind mount to the pod.
// +optional
AzureFile *AzureFileVolumeSource
// ConfigMap represents a configMap that should populate this volume
// +optional
ConfigMap *ConfigMapVolumeSource
// VsphereVolume represents a vSphere volume attached and mounted on kubelets host machine
// +optional
VsphereVolume *VsphereVirtualDiskVolumeSource
// AzureDisk represents an Azure Data Disk mount on the host and bind mount to the pod.
// +optional
AzureDisk *AzureDiskVolumeSource
// PhotonPersistentDisk represents a Photon Controller persistent disk attached and mounted on kubelets host machine
PhotonPersistentDisk *PhotonPersistentDiskVolumeSource
// Items for all in one resources secrets, configmaps, and downward API
Projected *ProjectedVolumeSource
// PortworxVolume represents a portworx volume attached and mounted on kubelets host machine
// +optional
PortworxVolume *PortworxVolumeSource
// ScaleIO represents a ScaleIO persistent volume attached and mounted on Kubernetes nodes.
// +optional
ScaleIO *ScaleIOVolumeSource
// StorageOS represents a StorageOS volume that is attached to the kubelet's host machine and mounted into the pod
// +optional
StorageOS *StorageOSVolumeSource
}
// 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.
// +optional
GCEPersistentDisk *GCEPersistentDiskVolumeSource
// AWSElasticBlockStore represents an AWS EBS disk that is attached to a
// kubelet's host machine and then exposed to the pod.
// +optional
AWSElasticBlockStore *AWSElasticBlockStoreVolumeSource
// 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.
// +optional
HostPath *HostPathVolumeSource
// Glusterfs represents a Glusterfs volume that is attached to a host and exposed to the pod
// +optional
Glusterfs *GlusterfsVolumeSource
// NFS represents an NFS mount on the host that shares a pod's lifetime
// +optional
NFS *NFSVolumeSource
// RBD represents a Rados Block Device mount on the host that shares a pod's lifetime
// +optional
RBD *RBDPersistentVolumeSource
// Quobyte represents a Quobyte mount on the host that shares a pod's lifetime
// +optional
Quobyte *QuobyteVolumeSource
// ISCSIVolumeSource represents an ISCSI resource that is attached to a
// kubelet's host machine and then exposed to the pod.
// +optional
ISCSI *ISCSIVolumeSource
// FlexVolume represents a generic volume resource that is
// provisioned/attached using an exec based plugin. This is an alpha feature and may change in future.
// +optional
FlexVolume *FlexVolumeSource
// Cinder represents a cinder volume attached and mounted on kubelets host machine
// +optional
Cinder *CinderVolumeSource
// CephFS represents a Ceph FS mount on the host that shares a pod's lifetime
// +optional
CephFS *CephFSPersistentVolumeSource
// FC represents a Fibre Channel resource that is attached to a kubelet's host machine and then exposed to the pod.
// +optional
FC *FCVolumeSource
// Flocker represents a Flocker volume attached to a kubelet's host machine. This depends on the Flocker control service being running
// +optional
Flocker *FlockerVolumeSource
// AzureFile represents an Azure File Service mount on the host and bind mount to the pod.
// +optional
AzureFile *AzureFilePersistentVolumeSource
// VsphereVolume represents a vSphere volume attached and mounted on kubelets host machine
// +optional
VsphereVolume *VsphereVirtualDiskVolumeSource
// AzureDisk represents an Azure Data Disk mount on the host and bind mount to the pod.
// +optional
AzureDisk *AzureDiskVolumeSource
// PhotonPersistentDisk represents a Photon Controller persistent disk attached and mounted on kubelets host machine
PhotonPersistentDisk *PhotonPersistentDiskVolumeSource
// PortworxVolume represents a portworx volume attached and mounted on kubelets host machine
// +optional
PortworxVolume *PortworxVolumeSource
// ScaleIO represents a ScaleIO persistent volume attached and mounted on Kubernetes nodes.
// +optional
ScaleIO *ScaleIOPersistentVolumeSource
// Local represents directly-attached storage with node affinity
// +optional
Local *LocalVolumeSource
// StorageOS represents a StorageOS volume that is attached to the kubelet's host machine and mounted into the pod
// More info: https://releases.k8s.io/HEAD/examples/volumes/storageos/README.md
// +optional
StorageOS *StorageOSPersistentVolumeSource
}
type PersistentVolumeClaimVolumeSource struct {
// ClaimName is the name of a PersistentVolumeClaim in the same namespace as the pod using this volume
ClaimName string
// Optional: Defaults to false (read/write). ReadOnly here
// will force the ReadOnly setting in VolumeMounts
// +optional
ReadOnly bool
}
const (
// BetaStorageClassAnnotation represents the beta/previous StorageClass annotation.
// It's deprecated and will be removed in a future release. (#51440)
BetaStorageClassAnnotation = "volume.beta.kubernetes.io/storage-class"
// MountOptionAnnotation defines mount option annotation used in PVs
MountOptionAnnotation = "volume.beta.kubernetes.io/mount-options"
// AlphaStorageNodeAffinityAnnotation defines node affinity policies for a PersistentVolume.
// Value is a string of the json representation of type NodeAffinity
AlphaStorageNodeAffinityAnnotation = "volume.alpha.kubernetes.io/node-affinity"
)
// +genclient
// +genclient:nonNamespaced
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
type PersistentVolume struct {
metav1.TypeMeta
// +optional
metav1.ObjectMeta
//Spec defines a persistent volume owned by the cluster
// +optional
Spec PersistentVolumeSpec
// Status represents the current information about persistent volume.
// +optional
Status PersistentVolumeStatus
}
type PersistentVolumeSpec struct {
// Resources represents the actual resources of the volume
Capacity ResourceList
// Source represents the location and type of a volume to mount.
PersistentVolumeSource
// AccessModes contains all ways the volume can be mounted
// +optional
AccessModes []PersistentVolumeAccessMode
// 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.
// When set to non-nil value, PVC.Spec.Selector of the referenced PVC is
// ignored, i.e. labels of this PV do not need to match PVC selector.
// +optional
ClaimRef *ObjectReference
// Optional: what happens to a persistent volume when released from its claim.
// +optional
PersistentVolumeReclaimPolicy PersistentVolumeReclaimPolicy
// Name of StorageClass to which this persistent volume belongs. Empty value
// means that this volume does not belong to any StorageClass.
// +optional
StorageClassName string
// A list of mount options, e.g. ["ro", "soft"]. Not validated - mount will
// simply fail if one is invalid.
// +optional
MountOptions []string
}
// 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
// +optional
Phase PersistentVolumePhase
// A human-readable message indicating details about why the volume is in this state.
// +optional
Message string
// Reason is a brief CamelCase string that describes any failure and is meant for machine parsing and tidy display in the CLI
// +optional
Reason string
}
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
type PersistentVolumeList struct {
metav1.TypeMeta
// +optional
metav1.ListMeta
Items []PersistentVolume
}
// +genclient
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
// PersistentVolumeClaim is a user's request for and claim to a persistent volume
type PersistentVolumeClaim struct {
metav1.TypeMeta
// +optional
metav1.ObjectMeta
// Spec defines the volume requested by a pod author
// +optional
Spec PersistentVolumeClaimSpec
// Status represents the current information about a claim
// +optional
Status PersistentVolumeClaimStatus
}
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
type PersistentVolumeClaimList struct {
metav1.TypeMeta
// +optional
metav1.ListMeta
Items []PersistentVolumeClaim
}
// 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
// +optional
AccessModes []PersistentVolumeAccessMode
// A label query over volumes to consider for binding. This selector is
// ignored when VolumeName is set
// +optional
Selector *metav1.LabelSelector
// Resources represents the minimum resources required
// +optional
Resources ResourceRequirements
// VolumeName is the binding reference to the PersistentVolume backing this
// claim. When set to non-empty value Selector is not evaluated
// +optional
VolumeName string
// Name of the StorageClass required by the claim.
// More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#class-1
// +optional
StorageClassName *string
}
type PersistentVolumeClaimConditionType string
// These are valid conditions of Pvc
const (
// An user trigger resize of pvc has been started
PersistentVolumeClaimResizing PersistentVolumeClaimConditionType = "Resizing"
)
type PersistentVolumeClaimCondition struct {
Type PersistentVolumeClaimConditionType
Status ConditionStatus
// +optional
LastProbeTime metav1.Time
// +optional
LastTransitionTime metav1.Time
// +optional
Reason string
// +optional
Message string
}
type PersistentVolumeClaimStatus struct {
// Phase represents the current phase of PersistentVolumeClaim
// +optional
Phase PersistentVolumeClaimPhase
// AccessModes contains all ways the volume backing the PVC can be mounted
// +optional
AccessModes []PersistentVolumeAccessMode
// Represents the actual resources of the underlying volume
// +optional
Capacity ResourceList
// +optional
Conditions []PersistentVolumeClaimCondition
}
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"
)
type HostPathType string
const (
// For backwards compatible, leave it empty if unset
HostPathUnset HostPathType = ""
// If nothing exists at the given path, an empty directory will be created there
// as needed with file mode 0755, having the same group and ownership with Kubelet.
HostPathDirectoryOrCreate HostPathType = "DirectoryOrCreate"
// A directory must exist at the given path
HostPathDirectory HostPathType = "Directory"
// If nothing exists at the given path, an empty file will be created there
// as needed with file mode 0644, having the same group and ownership with Kubelet.
HostPathFileOrCreate HostPathType = "FileOrCreate"
// A file must exist at the given path
HostPathFile HostPathType = "File"
// A UNIX socket must exist at the given path
HostPathSocket HostPathType = "Socket"
// A character device must exist at the given path
HostPathCharDev HostPathType = "CharDevice"
// A block device must exist at the given path
HostPathBlockDev HostPathType = "BlockDevice"
)
// Represents a host path mapped into a pod.
// Host path volumes do not support ownership management or SELinux relabeling.
type HostPathVolumeSource struct {
// If the path is a symlink, it will follow the link to the real path.
Path string
// Defaults to ""
Type *HostPathType
}
// 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 satisfies 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.
// +optional
Medium StorageMedium
// Total amount of local storage required for this EmptyDir volume.
// The size limit is also applicable for memory medium.
// The maximum usage on memory medium EmptyDir would be the minimum value between
// the SizeLimit specified here and the sum of memory limits of all containers in a pod.
// The default is nil which means that the limit is undefined.
// More info: http://kubernetes.io/docs/user-guide/volumes#emptydir
// +optional
SizeLimit *resource.Quantity
}
// 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)
StorageMediumHugePages StorageMedium = "HugePages" // use hugepages
)
// 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
// 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
// +optional
FSType string
// 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.
// +optional
Partition int32
// Optional: Defaults to false (read/write). ReadOnly here will force
// the ReadOnly setting in VolumeMounts.
// +optional
ReadOnly bool
}
// 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)
// +optional
TargetPortal string
// Required: target iSCSI Qualified Name
// +optional
IQN string
// Required: iSCSI target lun number
// +optional
Lun int32
// Optional: Defaults to 'default' (tcp). iSCSI interface name that uses an iSCSI transport.
// +optional
ISCSIInterface string
// 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
// +optional
FSType string
// Optional: Defaults to false (read/write). ReadOnly here will force
// the ReadOnly setting in VolumeMounts.
// +optional
ReadOnly bool
// Optional: list of iSCSI target portal ips for high availability.
// the portal is either an IP or ip_addr:port if port is other than default (typically TCP ports 860 and 3260)
// +optional
Portals []string
// Optional: whether support iSCSI Discovery CHAP authentication
// +optional
DiscoveryCHAPAuth bool
// Optional: whether support iSCSI Session CHAP authentication
// +optional
SessionCHAPAuth bool
// Optional: CHAP secret for iSCSI target and initiator authentication.
// The secret is used if either DiscoveryCHAPAuth or SessionCHAPAuth is true
// +optional
SecretRef *LocalObjectReference
// Optional: Custom initiator name per volume.
// If initiatorName is specified with iscsiInterface simultaneously, new iSCSI interface
// <target portal>:<volume name> will be created for the connection.
// +optional
InitiatorName *string
}
// 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 {
// Optional: FC target worldwide names (WWNs)
// +optional
TargetWWNs []string
// Optional: FC target lun number
// +optional
Lun *int32
// 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
// +optional
FSType string
// Optional: Defaults to false (read/write). ReadOnly here will force
// the ReadOnly setting in VolumeMounts.
// +optional
ReadOnly bool
// Optional: FC volume World Wide Identifiers (WWIDs)
// Either WWIDs or TargetWWNs and Lun must be set, but not both simultaneously.
// +optional
WWIDs []string
}
// FlexVolume represents a generic volume resource that is
// provisioned/attached using an 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
// 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.
// +optional
FSType string
// 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.
// +optional
SecretRef *LocalObjectReference
// Optional: Defaults to false (read/write). ReadOnly here will force
// the ReadOnly setting in VolumeMounts.
// +optional
ReadOnly bool
// Optional: Extra driver options if any.
// +optional
Options map[string]string
}
// 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. An 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
// 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
// +optional
FSType string
// 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.
// +optional
Partition int32
// Optional: Defaults to false (read/write). ReadOnly here will force
// the ReadOnly setting in VolumeMounts.
// +optional
ReadOnly bool
}
// 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
// Commit hash, this is optional
// +optional
Revision string
// 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.
// +optional
Directory string
// 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.
// +optional
SecretName string
// 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 unless it is marked optional. Paths must be
// relative and may not contain the '..' path or start with '..'.
// +optional
Items []KeyToPath
// Mode bits to use on created files by default. Must be a value between
// 0 and 0777.
// Directories within the path are not affected by this setting.
// This might be in conflict with other options that affect the file
// mode, like fsGroup, and the result can be other mode bits set.
// +optional
DefaultMode *int32
// Specify whether the Secret or its key must be defined
// +optional
Optional *bool
}
// Adapts a secret into a projected volume.
//
// The contents of the target Secret's Data field will be presented in a
// projected volume as files using the keys in the Data field as the file names.
// Note that this is identical to a secret volume source without the default
// mode.
type SecretProjection struct {
LocalObjectReference
// 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 unless it is marked optional. Paths must be
// relative and may not contain the '..' path or start with '..'.
// +optional
Items []KeyToPath
// Specify whether the Secret or its key must be defined
// +optional
Optional *bool
}
// 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
// Path is the exported NFS share
Path string
// Optional: Defaults to false (read/write). ReadOnly here will force
// the NFS export to be mounted with read-only permissions
// +optional
ReadOnly bool
}
// Represents a Quobyte mount that lasts the lifetime of a pod.
// Quobyte volumes do not support ownership management or SELinux relabeling.
type QuobyteVolumeSource struct {
// Registry represents a single or multiple Quobyte Registry services
// specified as a string as host:port pair (multiple entries are separated with commas)
// which acts as the central registry for volumes
Registry string
// Volume is a string that references an already created Quobyte volume by name.
Volume string
// Defaults to false (read/write). ReadOnly here will force
// the Quobyte to be mounted with read-only permissions
// +optional
ReadOnly bool
// User to map volume access to
// Defaults to the root user
// +optional
User string
// Group to map volume access to
// Default is no group
// +optional
Group string
}
// 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
// Required: Path is the Glusterfs volume path
Path string
// Optional: Defaults to false (read/write). ReadOnly here will force
// the Glusterfs to be mounted with read-only permissions
// +optional
ReadOnly bool
}
// 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
// Required: RBDImage is the rados image name
RBDImage string
// 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
// +optional
FSType string
// Optional: RadosPool is the rados pool name,default is rbd
// +optional
RBDPool string
// Optional: RBDUser is the rados user name, default is admin
// +optional
RadosUser string
// Optional: Keyring is the path to key ring for RBDUser, default is /etc/ceph/keyring
// +optional
Keyring string
// Optional: SecretRef is name of the authentication secret for RBDUser, default is nil.