Documentation
¶
Overview ¶
Package volume includes internal representations of external volume types as well as utility methods required to mount/unmount volumes to kubelets.
Index ¶
- Constants
- func CalculateTimeoutForVolume(minimumTimeout, timeoutIncrement int, pv *v1.PersistentVolume) int64
- func ChooseZoneForVolume(zones sets.String, pvcName string) string
- func GenerateVolumeName(clusterName, pvName string, maxLength int) string
- func GetPath(mounter Mounter) (string, error)
- func IsDeletedVolumeInUse(err error) bool
- func IsNotSupported(err error) bool
- func NewDeletedVolumeInUseError(message string) error
- func NewPersistentVolumeRecyclerPodTemplate() *v1.Pod
- func RecycleVolumeByWatchingPodUntilCompletion(pvName string, pod *v1.Pod, kubeClient clientset.Interface, ...) error
- func RenameDirectory(oldPath, newName string) (string, error)
- func RoundUpSize(volumeSizeBytes int64, allocationUnitBytes int64) int64
- func SetVolumeOwnership(mounter Mounter, fsGroup *int64) error
- func UnmountViaEmptyDir(dir string, host VolumeHost, volName string, volSpec Spec, podUID types.UID) error
- func ValidateRecyclerPodTemplate(pod *v1.Pod) error
- type AttachableVolumePlugin
- type Attacher
- type Attributes
- type DeletableVolumePlugin
- type Deleter
- type Detacher
- type Metrics
- type MetricsError
- type MetricsNil
- type MetricsProvider
- type Mounter
- type PersistentVolumePlugin
- type ProvisionableVolumePlugin
- type Provisioner
- type RecyclableVolumePlugin
- type RecycleEventRecorder
- type Recycler
- type Spec
- type Unmounter
- type Volume
- type VolumeConfig
- type VolumeHost
- type VolumeOptions
- type VolumePlugin
- type VolumePluginMgr
- func (pm *VolumePluginMgr) FindAttachablePluginByName(name string) (AttachableVolumePlugin, error)
- func (pm *VolumePluginMgr) FindAttachablePluginBySpec(spec *Spec) (AttachableVolumePlugin, error)
- func (pm *VolumePluginMgr) FindCreatablePluginBySpec(spec *Spec) (ProvisionableVolumePlugin, error)
- func (pm *VolumePluginMgr) FindDeletablePluginByName(name string) (DeletableVolumePlugin, error)
- func (pm *VolumePluginMgr) FindDeletablePluginBySpec(spec *Spec) (DeletableVolumePlugin, error)
- func (pm *VolumePluginMgr) FindPersistentPluginByName(name string) (PersistentVolumePlugin, error)
- func (pm *VolumePluginMgr) FindPersistentPluginBySpec(spec *Spec) (PersistentVolumePlugin, error)
- func (pm *VolumePluginMgr) FindPluginByName(name string) (VolumePlugin, error)
- func (pm *VolumePluginMgr) FindPluginBySpec(spec *Spec) (VolumePlugin, error)
- func (pm *VolumePluginMgr) FindProvisionablePluginByName(name string) (ProvisionableVolumePlugin, error)
- func (pm *VolumePluginMgr) FindRecyclablePluginBySpec(spec *Spec) (RecyclableVolumePlugin, error)
- func (pm *VolumePluginMgr) InitPlugins(plugins []VolumePlugin, host VolumeHost) error
Constants ¶
const ( // ErrCodeNotSupported code for NotSupported Errors. ErrCodeNotSupported int = iota + 1 ErrCodeNoPathDefined ErrCodeFsInfoFailed )
const ( // Name of a volume in external cloud that is being provisioned and thus // should be ignored by rest of Kubernetes. ProvisionedVolumeName = "placeholder-for-provisioning" )
Variables ¶
This section is empty.
Functions ¶
func CalculateTimeoutForVolume ¶ added in v1.1.0
func CalculateTimeoutForVolume(minimumTimeout, timeoutIncrement int, pv *v1.PersistentVolume) int64
CalculateTimeoutForVolume calculates time for a Recycler pod to complete a recycle operation. The calculation and return value is either the minimumTimeout or the timeoutIncrement per Gi of storage size, whichever is greater.
func ChooseZoneForVolume ¶ added in v1.3.0
ChooseZone implements our heuristics for choosing a zone for volume creation based on the volume name Volumes are generally round-robin-ed across all active zones, using the hash of the PVC Name. However, if the PVCName ends with `-<integer>`, we will hash the prefix, and then add the integer to the hash. This means that a StatefulSet's volumes (`claimname-statefulsetname-id`) will spread across available zones, assuming the id values are consecutive.
func GenerateVolumeName ¶ added in v1.2.0
GenerateVolumeName returns a PV name with clusterName prefix. The function should be used to generate a name of GCE PD or Cinder volume. It basically adds "<clusterName>-dynamic-" before the PV name, making sure the resulting string fits given length and cuts "dynamic" if not.
func IsDeletedVolumeInUse ¶ added in v1.5.0
IsDeletedVolumeInUse returns true if an error returned from Delete() is deletedVolumeInUseError
func IsNotSupported ¶ added in v1.5.0
IsNotSupported returns true if and only if err is "key" not found error.
func NewDeletedVolumeInUseError ¶ added in v1.5.0
NewDeletedVolumeInUseError returns a new instance of DeletedVolumeInUseError error.
func NewPersistentVolumeRecyclerPodTemplate ¶ added in v1.1.0
NewPersistentVolumeRecyclerPodTemplate creates a template for a recycler pod. By default, a recycler pod simply runs "rm -rf" on a volume and tests for emptiness. Most attributes of the template will be correct for most plugin implementations. The following attributes can be overridden per plugin via configuration:
- pod.Spec.Volumes[0].VolumeSource must be overridden. Recycler implementations without a valid VolumeSource will fail.
- pod.GenerateName helps distinguish recycler pods by name. Recommended. Default is "pv-recycler-".
- pod.Spec.ActiveDeadlineSeconds gives the recycler pod a maximum timeout before failing. Recommended. Default is 60 seconds.
See HostPath and NFS for working recycler examples
func RecycleVolumeByWatchingPodUntilCompletion ¶ added in v1.1.0
func RecycleVolumeByWatchingPodUntilCompletion(pvName string, pod *v1.Pod, kubeClient clientset.Interface, recorder RecycleEventRecorder) error
RecycleVolumeByWatchingPodUntilCompletion is intended for use with volume Recyclers. This function will save the given Pod to the API and watch it until it completes, fails, or the pod's ActiveDeadlineSeconds is exceeded, whichever comes first. An attempt to delete a recycler pod is always attempted before returning.
In case there is a pod with the same namespace+name already running, this function assumes it's an older instance of the recycler pod and watches this old pod instead of starting a new one.
pod - the pod designed by a volume plugin to recycle the volume. pod.Name will be overwritten with unique name based on PV.Name. client - kube client for API operations.
func RenameDirectory ¶ added in v0.14.0
func RoundUpSize ¶ added in v1.2.0
RoundUpSize calculates how many allocation units are needed to accommodate a volume of given size. E.g. when user wants 1500MiB volume, while AWS EBS allocates volumes in gibibyte-sized chunks, RoundUpSize(1500 * 1024*1024, 1024*1024*1024) returns '2' (2 GiB is the smallest allocatable volume that can hold 1500MiB)
func SetVolumeOwnership ¶ added in v1.2.0
SetVolumeOwnership modifies the given volume to be owned by fsGroup, and sets SetGid so that newly created files are owned by fsGroup. If fsGroup is nil nothing is done.
func UnmountViaEmptyDir ¶ added in v1.4.12
func UnmountViaEmptyDir(dir string, host VolumeHost, volName string, volSpec Spec, podUID types.UID) error
UnmountViaEmptyDir delegates the tear down operation for secret, configmap, git_repo and downwardapi to empty_dir
func ValidateRecyclerPodTemplate ¶ added in v1.6.0
Check validity of recycle pod template List of checks: - at least one volume is defined in the recycle pod template If successful, returns nil if unsuccessful, returns an error.
Types ¶
type AttachableVolumePlugin ¶ added in v1.2.0
type AttachableVolumePlugin interface { VolumePlugin NewAttacher() (Attacher, error) NewDetacher() (Detacher, error) GetDeviceMountRefs(deviceMountPath string) ([]string, error) }
AttachableVolumePlugin is an extended interface of VolumePlugin and is used for volumes that require attachment to a node before mounting.
type Attacher ¶ added in v1.2.0
type Attacher interface { // Attaches the volume specified by the given spec to the node with the given Name. // On success, returns the device path where the device was attached on the // node. Attach(spec *Spec, nodeName types.NodeName) (string, error) // VolumesAreAttached checks whether the list of volumes still attached to the specified // the node. It returns a map which maps from the volume spec to the checking result. // If an error is occured during checking, the error will be returned VolumesAreAttached(specs []*Spec, nodeName types.NodeName) (map[*Spec]bool, error) // WaitForAttach blocks until the device is attached to this // node. If it successfully attaches, the path to the device // is returned. Otherwise, if the device does not attach after // the given timeout period, an error will be returned. WaitForAttach(spec *Spec, devicePath string, timeout time.Duration) (string, error) // GetDeviceMountPath returns a path where the device should // be mounted after it is attached. This is a global mount // point which should be bind mounted for individual volumes. GetDeviceMountPath(spec *Spec) (string, error) // MountDevice mounts the disk to a global path which // individual pods can then bind mount MountDevice(spec *Spec, devicePath string, deviceMountPath string) error }
Attacher can attach a volume to a node.
type Attributes ¶ added in v1.2.0
Attributes represents the attributes of this mounter.
type DeletableVolumePlugin ¶ added in v1.1.0
type DeletableVolumePlugin interface { VolumePlugin // NewDeleter creates a new volume.Deleter which knows how to delete this // resource in accordance with the underlying storage provider after the // volume's release from a claim NewDeleter(spec *Spec) (Deleter, error) }
DeletableVolumePlugin is an extended interface of VolumePlugin and is used by persistent volumes that want to be deleted from the cluster after their release from a PersistentVolumeClaim.
type Deleter ¶ added in v1.1.0
type Deleter interface { Volume // This method should block until completion. // deletedVolumeInUseError returned from this function will not be reported // as error and it will be sent as "Info" event to the PV being deleted. The // volume controller will retry deleting the volume in the next periodic // sync. This can be used to postpone deletion of a volume that is being // dettached from a node. Deletion of such volume would fail anyway and such // error would confuse users. Delete() error }
Deleter removes the resource from the underlying storage provider. Calls to this method should block until the deletion is complete. Any error returned indicates the volume has failed to be reclaimed. A nil return indicates success.
type Detacher ¶ added in v1.2.0
type Detacher interface { // Detach the given device from the node with the given Name. Detach(deviceName string, nodeName types.NodeName) error // UnmountDevice unmounts the global mount of the disk. This // should only be called once all bind mounts have been // unmounted. UnmountDevice(deviceMountPath string) error }
Detacher can detach a volume from a node.
type Metrics ¶ added in v1.2.0
type Metrics struct { // Used represents the total bytes used by the Volume. // Note: For block devices this maybe more than the total size of the files. Used *resource.Quantity // Capacity represents the total capacity (bytes) of the volume's // underlying storage. For Volumes that share a filesystem with the host // (e.g. emptydir, hostpath) this is the size of the underlying storage, // and will not equal Used + Available as the fs is shared. Capacity *resource.Quantity // Available represents the storage space available (bytes) for the // Volume. For Volumes that share a filesystem with the host (e.g. // emptydir, hostpath), this is the available space on the underlying // storage, and is shared with host processes and other Volumes. Available *resource.Quantity // InodesUsed represents the total inodes used by the Volume. InodesUsed *resource.Quantity // Inodes represents the total number of inodes availible in the volume. // For volumes that share a filesystem with the host (e.g. emptydir, hostpath), // this is the inodes available in the underlying storage, // and will not equal InodesUsed + InodesFree as the fs is shared. Inodes *resource.Quantity // InodesFree represent the inodes available for the volume. For Volues that share // a filesystem with the host (e.g. emptydir, hostpath), this is the free inodes // on the underlying sporage, and is shared with host processes and other volumes InodesFree *resource.Quantity }
Metrics represents the used and available bytes of the Volume.
type MetricsError ¶ added in v1.5.0
MetricsError to distinguish different Metrics Errors.
func NewFsInfoFailedError ¶ added in v1.5.0
func NewFsInfoFailedError(err error) *MetricsError
NewFsInfoFailedError creates a new MetricsError with code FsInfoFailed.
func NewNoPathDefinedError ¶ added in v1.5.0
func NewNoPathDefinedError() *MetricsError
NewNoPathDefined creates a new MetricsError with code NoPathDefined.
func NewNotSupportedError ¶ added in v1.5.0
func NewNotSupportedError() *MetricsError
NewNotSupportedError creates a new MetricsError with code NotSupported.
func (*MetricsError) Error ¶ added in v1.5.0
func (e *MetricsError) Error() string
type MetricsNil ¶ added in v1.2.0
type MetricsNil struct{}
MetricsNil represents a MetricsProvider that does not support returning Metrics. It serves as a placeholder for Volumes that do not yet support metrics.
func (*MetricsNil) GetMetrics ¶ added in v1.2.0
func (*MetricsNil) GetMetrics() (*Metrics, error)
GetMetrics returns an empty Metrics and an error. See MetricsProvider.GetMetrics
type MetricsProvider ¶ added in v1.2.0
type MetricsProvider interface { // GetMetrics returns the Metrics for the Volume. Maybe expensive for // some implementations. GetMetrics() (*Metrics, error) }
MetricsProvider exposes metrics (e.g. used,available space) related to a Volume.
func NewCachedMetrics ¶ added in v1.2.0
func NewCachedMetrics(provider MetricsProvider) MetricsProvider
NewCachedMetrics creates a new cachedMetrics wrapping another MetricsProvider and caching the results.
func NewMetricsDu ¶ added in v1.2.0
func NewMetricsDu(path string) MetricsProvider
NewMetricsDu creates a new metricsDu with the Volume path.
func NewMetricsStatFS ¶ added in v1.3.0
func NewMetricsStatFS(path string) MetricsProvider
NewMetricsStatfs creates a new metricsStatFS with the Volume path.
type Mounter ¶ added in v1.3.0
type Mounter interface { // Uses Interface to provide the path for Docker binds. Volume // CanMount is called immediately prior to Setup to check if // the required components (binaries, etc.) are available on // the underlying node to complete the subsequent SetUp (mount) // operation. If CanMount returns error, the mount operation is // aborted and an event is generated indicating that the node // does not have the required binaries to complete the mount. // If CanMount succeeds, the mount operation continues // normally. The CanMount check can be enabled or disabled // using the experimental-check-mount-binaries binary flag CanMount() error // SetUp prepares and mounts/unpacks the volume to a // self-determined directory path. The mount point and its // content should be owned by 'fsGroup' so that it can be // accessed by the pod. This may be called more than once, so // implementations must be idempotent. SetUp(fsGroup *int64) error // SetUpAt prepares and mounts/unpacks the volume to the // specified directory path, which may or may not exist yet. // The mount point and its content should be owned by // 'fsGroup' so that it can be accessed by the pod. This may // be called more than once, so implementations must be // idempotent. SetUpAt(dir string, fsGroup *int64) error // GetAttributes returns the attributes of the mounter. GetAttributes() Attributes }
Mounter interface provides methods to set up/mount the volume.
type PersistentVolumePlugin ¶ added in v0.14.0
type PersistentVolumePlugin interface { VolumePlugin // GetAccessModes describes the ways a given volume can be accessed/mounted. GetAccessModes() []v1.PersistentVolumeAccessMode }
PersistentVolumePlugin is an extended interface of VolumePlugin and is used by volumes that want to provide long term persistence of data
type ProvisionableVolumePlugin ¶ added in v1.2.0
type ProvisionableVolumePlugin interface { VolumePlugin // NewProvisioner creates a new volume.Provisioner which knows how to // create PersistentVolumes in accordance with the plugin's underlying // storage provider NewProvisioner(options VolumeOptions) (Provisioner, error) }
ProvisionableVolumePlugin is an extended interface of VolumePlugin and is used to create volumes for the cluster.
type Provisioner ¶ added in v1.2.0
type Provisioner interface { // Provision creates the resource by allocating the underlying volume in a // storage system. This method should block until completion and returns // PersistentVolume representing the created storage resource. Provision() (*v1.PersistentVolume, error) }
Provisioner is an interface that creates templates for PersistentVolumes and can create the volume as a new resource in the infrastructure provider.
type RecyclableVolumePlugin ¶ added in v0.19.0
type RecyclableVolumePlugin interface { VolumePlugin // NewRecycler creates a new volume.Recycler which knows how to reclaim this // resource after the volume's release from a PersistentVolumeClaim. The // recycler will use the provided recorder to write any events that might be // interesting to user. It's expected that caller will pass these events to // the PV being recycled. NewRecycler(pvName string, spec *Spec, eventRecorder RecycleEventRecorder) (Recycler, error) }
RecyclableVolumePlugin is an extended interface of VolumePlugin and is used by persistent volumes that want to be recycled before being made available again to new claims
type RecycleEventRecorder ¶ added in v1.4.1
type RecycleEventRecorder func(eventtype, message string)
type Recycler ¶ added in v0.19.0
type Recycler interface { Volume // Recycle reclaims the resource. Calls to this method should block until // the recycling task is complete. Any error returned indicates the volume // has failed to be reclaimed. A nil return indicates success. Recycle() error }
Recycler provides methods to reclaim the volume resource.
type Spec ¶ added in v0.16.1
type Spec struct { Volume *v1.Volume PersistentVolume *v1.PersistentVolume ReadOnly bool }
Spec is an internal representation of a volume. All API volume types translate to Spec.
func NewSpecFromPersistentVolume ¶ added in v0.16.1
func NewSpecFromPersistentVolume(pv *v1.PersistentVolume, readOnly bool) *Spec
NewSpecFromPersistentVolume creates an Spec from an v1.PersistentVolume
func NewSpecFromVolume ¶ added in v0.16.1
NewSpecFromVolume creates an Spec from an v1.Volume
type Unmounter ¶ added in v1.3.0
type Unmounter interface { Volume // TearDown unmounts the volume from a self-determined directory and // removes traces of the SetUp procedure. TearDown() error // TearDown unmounts the volume from the specified directory and // removes traces of the SetUp procedure. TearDownAt(dir string) error }
Unmounter interface provides methods to cleanup/unmount the volumes.
type Volume ¶ added in v0.14.0
type Volume interface { // GetPath returns the path to which the volume should be mounted for the // pod. GetPath() string // MetricsProvider embeds methods for exposing metrics (e.g. // used, available space). MetricsProvider }
Volume represents a directory used by pods or hosts on a node. All method implementations of methods in the volume interface must be idempotent.
type VolumeConfig ¶ added in v1.1.0
type VolumeConfig struct { // RecyclerPodTemplate is pod template that understands how to scrub clean // a persistent volume after its release. The template is used by plugins // which override specific properties of the pod in accordance with that // plugin. See NewPersistentVolumeRecyclerPodTemplate for the properties // that are expected to be overridden. RecyclerPodTemplate *v1.Pod // RecyclerMinimumTimeout is the minimum amount of time in seconds for the // recycler pod's ActiveDeadlineSeconds attribute. Added to the minimum // timeout is the increment per Gi of capacity. RecyclerMinimumTimeout int // RecyclerTimeoutIncrement is the number of seconds added to the recycler // pod's ActiveDeadlineSeconds for each Gi of capacity in the persistent // volume. Example: 5Gi volume x 30s increment = 150s + 30s minimum = 180s // ActiveDeadlineSeconds for recycler pod RecyclerTimeoutIncrement int // PVName is name of the PersistentVolume instance that is being recycled. // It is used to generate unique recycler pod name. PVName string // OtherAttributes stores config as strings. These strings are opaque to // the system and only understood by the binary hosting the plugin and the // plugin itself. OtherAttributes map[string]string // ProvisioningEnabled configures whether provisioning of this plugin is // enabled or not. Currently used only in host_path plugin. ProvisioningEnabled bool }
VolumeConfig is how volume plugins receive configuration. An instance specific to the plugin will be passed to the plugin's ProbeVolumePlugins(config) func. Reasonable defaults will be provided by the binary hosting the plugins while allowing override of those default values. Those config values are then set to an instance of VolumeConfig and passed to the plugin.
Values in VolumeConfig are intended to be relevant to several plugins, but not necessarily all plugins. The preference is to leverage strong typing in this struct. All config items must have a descriptive but non-specific name (i.e, RecyclerMinimumTimeout is OK but RecyclerMinimumTimeoutForNFS is !OK). An instance of config will be given directly to the plugin, so config names specific to plugins are unneeded and wrongly expose plugins in this VolumeConfig struct.
OtherAttributes is a map of string values intended for one-off configuration of a plugin or config that is only relevant to a single plugin. All values are passed by string and require interpretation by the plugin. Passing config as strings is the least desirable option but can be used for truly one-off configuration. The binary should still use strong typing for this value when binding CLI values before they are passed as strings in OtherAttributes.
type VolumeHost ¶ added in v0.14.0
type VolumeHost interface { // GetPluginDir returns the absolute path to a directory under which // a given plugin may store data. This directory might not actually // exist on disk yet. For plugin data that is per-pod, see // GetPodPluginDir(). GetPluginDir(pluginName string) string // GetPodVolumeDir returns the absolute path a directory which // represents the named volume under the named plugin for the given // pod. If the specified pod does not exist, the result of this call // might not exist. GetPodVolumeDir(podUID types.UID, pluginName string, volumeName string) string // GetPodPluginDir returns the absolute path to a directory under which // a given plugin may store data for a given pod. If the specified pod // does not exist, the result of this call might not exist. This // directory might not actually exist on disk yet. GetPodPluginDir(podUID types.UID, pluginName string) string // GetKubeClient returns a client interface GetKubeClient() clientset.Interface // NewWrapperMounter finds an appropriate plugin with which to handle // the provided spec. This is used to implement volume plugins which // "wrap" other plugins. For example, the "secret" volume is // implemented in terms of the "emptyDir" volume. NewWrapperMounter(volName string, spec Spec, pod *v1.Pod, opts VolumeOptions) (Mounter, error) // NewWrapperUnmounter finds an appropriate plugin with which to handle // the provided spec. See comments on NewWrapperMounter for more // context. NewWrapperUnmounter(volName string, spec Spec, podUID types.UID) (Unmounter, error) // Get cloud provider from kubelet. GetCloudProvider() cloudprovider.Interface // Get mounter interface. GetMounter() mount.Interface // Get writer interface for writing data to disk. GetWriter() io.Writer // Returns the hostname of the host kubelet is running on GetHostName() string // Returns host IP or nil in the case of error. GetHostIP() (net.IP, error) // Returns node allocatable. GetNodeAllocatable() (v1.ResourceList, error) // Returns a function that returns a secret. GetSecretFunc() func(namespace, name string) (*v1.Secret, error) }
VolumeHost is an interface that plugins can use to access the kubelet.
type VolumeOptions ¶ added in v0.15.0
type VolumeOptions struct { // Reclamation policy for a persistent volume PersistentVolumeReclaimPolicy v1.PersistentVolumeReclaimPolicy // Suggested PV.Name of the PersistentVolume to provision. // This is a generated name guaranteed to be unique in Kubernetes cluster. // If you choose not to use it as volume name, ensure uniqueness by either // combining it with your value or create unique values of your own. PVName string // PVC is reference to the claim that lead to provisioning of a new PV. // Provisioners *must* create a PV that would be matched by this PVC, // i.e. with required capacity, accessMode, labels matching PVC.Selector and // so on. PVC *v1.PersistentVolumeClaim // Unique name of Kubernetes cluster. ClusterName string // Tags to attach to the real volume in the cloud provider - e.g. AWS EBS CloudTags *map[string]string // Volume provisioning parameters from StorageClass Parameters map[string]string }
VolumeOptions contains option information about a volume.
type VolumePlugin ¶ added in v0.14.0
type VolumePlugin interface { // Init initializes the plugin. This will be called exactly once // before any New* calls are made - implementations of plugins may // depend on this. Init(host VolumeHost) error // Name returns the plugin's name. Plugins should use namespaced names // such as "example.com/volume". The "kubernetes.io" namespace is // reserved for plugins which are bundled with kubernetes. GetPluginName() string // GetVolumeName returns the name/ID to uniquely identifying the actual // backing device, directory, path, etc. referenced by the specified volume // spec. // For Attachable volumes, this value must be able to be passed back to // volume Detach methods to identify the device to act on. // If the plugin does not support the given spec, this returns an error. GetVolumeName(spec *Spec) (string, error) // CanSupport tests whether the plugin supports a given volume // specification from the API. The spec pointer should be considered // const. CanSupport(spec *Spec) bool // RequiresRemount returns true if this plugin requires mount calls to be // reexecuted. Atomically updating volumes, like Downward API, depend on // this to update the contents of the volume. RequiresRemount() bool // NewMounter creates a new volume.Mounter from an API specification. // Ownership of the spec pointer in *not* transferred. // - spec: The v1.Volume spec // - pod: The enclosing pod NewMounter(spec *Spec, podRef *v1.Pod, opts VolumeOptions) (Mounter, error) // NewUnmounter creates a new volume.Unmounter from recoverable state. // - name: The volume name, as per the v1.Volume spec. // - podUID: The UID of the enclosing pod NewUnmounter(name string, podUID types.UID) (Unmounter, error) // ConstructVolumeSpec constructs a volume spec based on the given volume name // and mountPath. The spec may have incomplete information due to limited // information from input. This function is used by volume manager to reconstruct // volume spec by reading the volume directories from disk ConstructVolumeSpec(volumeName, mountPath string) (*Spec, error) }
VolumePlugin is an interface to volume plugins that can be used on a kubernetes node (e.g. by kubelet) to instantiate and manage volumes.
type VolumePluginMgr ¶ added in v0.14.0
type VolumePluginMgr struct {
// contains filtered or unexported fields
}
VolumePluginMgr tracks registered plugins.
func (*VolumePluginMgr) FindAttachablePluginByName ¶ added in v1.2.0
func (pm *VolumePluginMgr) FindAttachablePluginByName(name string) (AttachableVolumePlugin, error)
FindAttachablePluginByName fetches an attachable volume plugin by name. Unlike the other "FindPlugin" methods, this does not return error if no plugin is found. All volumes require a mounter and unmounter, but not every volume will have an attacher/detacher.
func (*VolumePluginMgr) FindAttachablePluginBySpec ¶ added in v1.2.0
func (pm *VolumePluginMgr) FindAttachablePluginBySpec(spec *Spec) (AttachableVolumePlugin, error)
FindAttachablePluginBySpec fetches a persistent volume plugin by name. Unlike the other "FindPlugin" methods, this does not return error if no plugin is found. All volumes require a mounter and unmounter, but not every volume will have an attacher/detacher.
func (*VolumePluginMgr) FindCreatablePluginBySpec ¶ added in v1.1.0
func (pm *VolumePluginMgr) FindCreatablePluginBySpec(spec *Spec) (ProvisionableVolumePlugin, error)
FindCreatablePluginBySpec fetches a persistent volume plugin by name. If no plugin is found, returns error.
func (*VolumePluginMgr) FindDeletablePluginByName ¶ added in v1.4.1
func (pm *VolumePluginMgr) FindDeletablePluginByName(name string) (DeletableVolumePlugin, error)
FindDeletablePluginByName fetches a persistent volume plugin by name. If no plugin is found, returns error.
func (*VolumePluginMgr) FindDeletablePluginBySpec ¶ added in v1.1.0
func (pm *VolumePluginMgr) FindDeletablePluginBySpec(spec *Spec) (DeletableVolumePlugin, error)
FindDeletablePluginBySppec fetches a persistent volume plugin by spec. If no plugin is found, returns error.
func (*VolumePluginMgr) FindPersistentPluginByName ¶ added in v0.14.0
func (pm *VolumePluginMgr) FindPersistentPluginByName(name string) (PersistentVolumePlugin, error)
FindPersistentPluginByName fetches a persistent volume plugin by name. If no plugin is found, returns error.
func (*VolumePluginMgr) FindPersistentPluginBySpec ¶ added in v0.19.0
func (pm *VolumePluginMgr) FindPersistentPluginBySpec(spec *Spec) (PersistentVolumePlugin, error)
FindPersistentPluginBySpec looks for a persistent volume plugin that can support a given volume specification. If no plugin is found, return an error
func (*VolumePluginMgr) FindPluginByName ¶ added in v0.14.0
func (pm *VolumePluginMgr) FindPluginByName(name string) (VolumePlugin, error)
FindPluginByName fetches a plugin by name or by legacy name. If no plugin is found, returns error.
func (*VolumePluginMgr) FindPluginBySpec ¶ added in v0.14.0
func (pm *VolumePluginMgr) FindPluginBySpec(spec *Spec) (VolumePlugin, error)
FindPluginBySpec looks for a plugin that can support a given volume specification. If no plugins can support or more than one plugin can support it, return error.
func (*VolumePluginMgr) FindProvisionablePluginByName ¶ added in v1.4.1
func (pm *VolumePluginMgr) FindProvisionablePluginByName(name string) (ProvisionableVolumePlugin, error)
FindProvisionablePluginByName fetches a persistent volume plugin by name. If no plugin is found, returns error.
func (*VolumePluginMgr) FindRecyclablePluginBySpec ¶ added in v0.19.0
func (pm *VolumePluginMgr) FindRecyclablePluginBySpec(spec *Spec) (RecyclableVolumePlugin, error)
FindRecyclablePluginByName fetches a persistent volume plugin by name. If no plugin is found, returns error.
func (*VolumePluginMgr) InitPlugins ¶ added in v0.14.0
func (pm *VolumePluginMgr) InitPlugins(plugins []VolumePlugin, host VolumeHost) error
InitPlugins initializes each plugin. All plugins must have unique names. This must be called exactly once before any New* methods are called on any plugins.
Source Files
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Directories
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Path | Synopsis |
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Package aws_ebs contains the internal representation of AWS Elastic Block Store volumes.
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Package aws_ebs contains the internal representation of AWS Elastic Block Store volumes. |
Package azure_file contains the internal representation of Azure File Service Volume
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Package azure_file contains the internal representation of Azure File Service Volume |
Package nfs contains the internal representation of Ceph file system (CephFS) volumes.
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Package nfs contains the internal representation of Ceph file system (CephFS) volumes. |
Package cinder contains the internal representation of cinder volumes.
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Package cinder contains the internal representation of cinder volumes. |
Package configmap contains the internal representation of configMap volumes.
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Package configmap contains the internal representation of configMap volumes. |
Package empty_dir contains the internal representation of emptyDir volumes.
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Package empty_dir contains the internal representation of emptyDir volumes. |
Package fc contains the internal representation of Fibre Channel (fc) volumes.
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Package fc contains the internal representation of Fibre Channel (fc) volumes. |
Package flocker contains the internal representation of Flocker volumes
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Package flocker contains the internal representation of Flocker volumes |
Package gce_pd contains the internal representation of GCE PersistentDisk volumes.
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Package gce_pd contains the internal representation of GCE PersistentDisk volumes. |
Package git_repo contains the internal representation of git repo volumes.
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Package git_repo contains the internal representation of git repo volumes. |
Package glusterfs contains the internal representation of glusterfs volumes.
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Package glusterfs contains the internal representation of glusterfs volumes. |
Package host_path contains the internal representation of hostPath volumes.
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Package host_path contains the internal representation of hostPath volumes. |
Package iscsi contains the internal representation of Internet Small Computer System Interface (iSCSI) volumes.
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Package iscsi contains the internal representation of Internet Small Computer System Interface (iSCSI) volumes. |
Package nfs contains the internal representation of network file system (NFS) volumes.
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Package nfs contains the internal representation of network file system (NFS) volumes. |
Package quobyte contains the internal representation of Quobyte volumes.
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Package quobyte contains the internal representation of Quobyte volumes. |
Package rbd contains the internal representation of Rados Block Store (Ceph) volumes.
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Package rbd contains the internal representation of Rados Block Store (Ceph) volumes. |
Package secret contains the internal representation of secret volumes.
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Package secret contains the internal representation of secret volumes. |
Contains utility code for use by volume plugins.
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Contains utility code for use by volume plugins. |
nestedpendingoperations
Package nestedpendingoperations is a modified implementation of pkg/util/goroutinemap.
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Package nestedpendingoperations is a modified implementation of pkg/util/goroutinemap. |
operationexecutor
Package operationexecutor implements interfaces that enable execution of attach, detach, mount, and unmount operations with a nestedpendingoperations so that more than one operation is never triggered on the same volume for the same pod.
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Package operationexecutor implements interfaces that enable execution of attach, detach, mount, and unmount operations with a nestedpendingoperations so that more than one operation is never triggered on the same volume for the same pod. |
types
Package types defines types used only by volume components
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Package types defines types used only by volume components |
volumehelper
Package volumehelper contains consts and helper methods used by various volume components (attach/detach controller, kubelet, etc.).
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Package volumehelper contains consts and helper methods used by various volume components (attach/detach controller, kubelet, etc.). |