flexvolume

package
v1.2.7 Latest Latest
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 Go to latest Published: Mar 26, 2020 License: Apache-2.0 Imports: 30 Imported by: 0

Documentation

Overview

Package flexvolume to manage Kubernetes storage attach events.

Package flexvolume to manage Kubernetes storage attach events.

Index

Constants

View Source 
const (
	// ClusterNamespaceKey key for cluster namespace option.
	ClusterNamespaceKey = "clusterNamespace"
	// ClusterNameKey key for cluster name option (deprecated).
	ClusterNameKey = "clusterName"
	// StorageClassKey key for storage class name option.
	StorageClassKey = "storageClass"
	// PoolKey key for pool name option.
	PoolKey = "pool"
	// BlockPoolKey key for blockPool name option.
	BlockPoolKey = "blockPool"
	// PoolKey key for image name option.
	ImageKey = "image"
	// PoolKey key for data pool name option.
	DataBlockPoolKey = "dataBlockPool"
)
View Source 
const (
	UnixSocketName         = ".rook.sock"
	FlexvolumeVendor       = "ceph.rook.io"
	FlexvolumeVendorLegacy = "rook.io"
	FlexDriverName         = "rook"
)
View Source 
const (
	// ReadOnly mount mode
	ReadOnly = "ro"
	// ReadWrite mount mode
	ReadWrite = "rw"
)

Variables

This section is empty.

Functions

func LoadFlexSettings added in v1.0.0 

func LoadFlexSettings(directory string) []byte

The flex settings must be loaded from a file next to the flex driver since there is context that can be used other than the directory where the flex driver is running. This method cannot write to stdout since it is running in the context of the kubelet which only expects the json settings to be output.

func RookDriverName 

func RookDriverName(context *clusterd.Context) (string, error)

RookDriverName return the Kubernetes version appropriate Rook driver name

func TouchFlexDrivers added in v0.9.0 

func TouchFlexDrivers(vendor, driverName string)

TouchFlexDrivers causes k8s to reload the flex volumes. Needed periodically due to a k8s race condition with flex driver loading.

Types

type AttachOptions 

type AttachOptions struct {
	Image            string `json:"image"`
	BlockPool        string `json:"blockPool"`
	Pool             string `json:"pool"`
	ClusterNamespace string `json:"clusterNamespace"`
	ClusterName      string `json:"clusterName"`
	StorageClass     string `json:"storageClass"`
	MountDir         string `json:"mountDir"`
	FsName           string `json:"fsName"`
	Path             string `json:"path"` // Path within the CephFS to mount
	MountUser        string `json:"mountUser"`
	MountSecret      string `json:"mountSecret"`
	RW               string `json:"kubernetes.io/readwrite"`
	FsType           string `json:"kubernetes.io/fsType"`
	FsGroup          string `json:"kubernetes.io/fsGroup"`
	VolumeName       string `json:"kubernetes.io/pvOrVolumeName"` // only available on 1.7
	Pod              string `json:"kubernetes.io/pod.name"`
	PodID            string `json:"kubernetes.io/pod.uid"`
	PodNamespace     string `json:"kubernetes.io/pod.namespace"`
}

type ClientAccessInfo 

type ClientAccessInfo struct {
	MonAddresses []string `json:"monAddresses"`
	UserName     string   `json:"userName"`
	SecretKey    string   `json:"secretKey"`
}

ClientAccessInfo hols info for Ceph access

type Controller 

type Controller struct {
	// contains filtered or unexported fields
}

Controller handles all events from the Flexvolume driver

func NewController 

func NewController(context *clusterd.Context, volumeAttachment attachment.Attachment, manager VolumeManager, mountSecurityMode string) *Controller

NewController create a new controller to handle events from the flexvolume driver

func (*Controller) Attach 

func (c *Controller) Attach(attachOpts AttachOptions, devicePath *string) error

Attach attaches rook volume to the node

func (*Controller) Detach 

func (c *Controller) Detach(detachOpts AttachOptions, _ *struct{}) error

Detach detaches a rook volume to the node

func (*Controller) DetachForce 

func (c *Controller) DetachForce(detachOpts AttachOptions, _ *struct{}) error

DetachForce forces a detach on a rook volume to the node

func (*Controller) Expand added in v1.1.0 

func (c *Controller) Expand(expandArgs ExpandArgs, _ *struct{}) error

Expand RBD image

func (*Controller) GetAttachInfoFromMountDir 

func (c *Controller) GetAttachInfoFromMountDir(mountDir string, attachOptions *AttachOptions) error

GetAttachInfoFromMountDir obtain pod and volume information from the mountDir. K8s does not provide all necessary information to detach a volume (https://github.com/kubernetes/kubernetes/issues/52590). So we are hacking a bit and by parsing it from mountDir

func (*Controller) GetClientAccessInfo 

func (c *Controller) GetClientAccessInfo(args []string, clientAccessInfo *ClientAccessInfo) error

GetClientAccessInfo obtains the cluster monitor endpoints, username and secret

func (*Controller) GetGlobalMountPath 

func (c *Controller) GetGlobalMountPath(input GlobalMountPathInput, globalMountPath *string) error

GetGlobalMountPath generate the global mount path where the device path is mounted. It is based on the kubelet root dir, which defaults to /var/lib/kubelet

func (*Controller) GetKernelVersion 

func (c *Controller) GetKernelVersion(_ *struct{}, kernelVersion *string) error

GetKernelVersion returns the kernel version of the current node.

func (*Controller) Log 

func (c *Controller) Log(message LogMessage, _ *struct{}) error

Log logs messages from the driver

func (*Controller) RemoveAttachmentObject 

func (c *Controller) RemoveAttachmentObject(detachOpts AttachOptions, safeToDetach *bool) error

RemoveAttachmentObject removes the attachment from the Volume CRD and returns whether the volume is safe to detach

type ExpandArgs added in v1.1.0 

type ExpandArgs struct {
	ExpandOptions *ExpandOptions
	Size          uint64
}

type ExpandOptions added in v1.1.0 

type ExpandOptions struct {
	Pool             string `json:"pool"`
	RW               string `json:"kubernetes.io/readwrite"`
	ClusterNamespace string `json:"clusterNamespace"`
	DataBlockPool    string `json:"dataBlockPool"`
	Image            string `json:"image"`
	FsType           string `json:"kubernetes.io/fsType"`
	StorageClass     string `json:"storageClass"`
	VolumeName       string `json:"kubernetes.io/pvOrVolumeName"`
}

type FlexvolumeServer 

type FlexvolumeServer struct {
	// contains filtered or unexported fields
}

FlexvolumeServer start a unix domain socket server to interact with the flexvolume driver

func NewFlexvolumeServer 

func NewFlexvolumeServer(context *clusterd.Context, controller *Controller) *FlexvolumeServer

NewFlexvolumeServer creates an Flexvolume server

func (*FlexvolumeServer) Start 

func (s *FlexvolumeServer) Start(driverVendor, driverName string) error

Start configures the flexvolume driver on the host and starts the unix domain socket server to communicate with the driver

func (*FlexvolumeServer) StopAll 

func (s *FlexvolumeServer) StopAll()

StopAll Stop the unix domain socket server and deletes the socket file

type GlobalMountPathInput 

type GlobalMountPathInput struct {
	VolumeName string `json:"volumeName"`
	DriverDir  string `json:"driverDir"`
}

type LogMessage 

type LogMessage struct {
	Message string `json:"message"`
	IsError bool   `json:"isError"`
}

type MockFlexvolumeController 

type MockFlexvolumeController struct {
	MockAttach                    func(attachOpts AttachOptions, devicePath *string) error
	MockDetach                    func(detachOpts AttachOptions, _ *struct{}) error
	MockDetachForce               func(detachOpts AttachOptions, _ *struct{}) error
	MockRemoveAttachmentObject    func(detachOpts AttachOptions, safeToDetach *bool) error
	MockLog                       func(message LogMessage, _ *struct{}) error
	MockGetAttachInfoFromMountDir func(mountDir string, attachOptions *AttachOptions) error
}

func (*MockFlexvolumeController) Attach 

func (m *MockFlexvolumeController) Attach(attachOpts AttachOptions, devicePath *string) error

func (*MockFlexvolumeController) Detach 

func (m *MockFlexvolumeController) Detach(detachOpts AttachOptions, _ *struct{}) error

func (*MockFlexvolumeController) DetachForce 

func (m *MockFlexvolumeController) DetachForce(detachOpts AttachOptions, _ *struct{}) error

func (*MockFlexvolumeController) GetAttachInfoFromMountDir 

func (m *MockFlexvolumeController) GetAttachInfoFromMountDir(mountDir string, attachOptions *AttachOptions) error

func (*MockFlexvolumeController) Log 

func (m *MockFlexvolumeController) Log(message LogMessage, _ *struct{}) error

func (*MockFlexvolumeController) RemoveAttachmentObject 

func (m *MockFlexvolumeController) RemoveAttachmentObject(detachOpts AttachOptions, safeToDetach *bool) error

type VolumeController 

type VolumeController interface {
	Attach(attachOpts AttachOptions, devicePath *string) error
	Detach(detachOpts AttachOptions, _ *struct{}) error
	DetachForce(detachOpts AttachOptions, _ *struct{}) error
	RemoveAttachmentObject(detachOpts AttachOptions, safeToDetach *bool) error
	Log(message LogMessage, _ *struct{}) error
	GetAttachInfoFromMountDir(mountDir string, attachOptions *AttachOptions) error
}

type VolumeManager 

type VolumeManager interface {
	Init() error
	Attach(image, pool, id, key, clusterName string) (string, error)
	Detach(image, pool, id, key, clusterName string, force bool) error
	Expand(image, pool, clusterName string, size uint64) error
}

VolumeManager handles flexvolume plugin storage operations

Source Files

View all Source files

Directories

Path Synopsis
Package attachment to manage Kubernetes storage attach events.
 Package attachment to manage Kubernetes storage attach events.
ceph

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