csi

package
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 Go to latest Published: May 14, 2020 License: MPL-2.0 Imports: 15 Imported by: 0

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Index

Constants

View Source 
const PluginTypeCSI = "csi"

PluginTypeCSI implements the CSI plugin interface

Variables

View Source 
var (
	VolumeAccessModeUnknown               = VolumeAccessMode(csipbv1.VolumeCapability_AccessMode_UNKNOWN)
	VolumeAccessModeSingleNodeWriter      = VolumeAccessMode(csipbv1.VolumeCapability_AccessMode_SINGLE_NODE_WRITER)
	VolumeAccessModeSingleNodeReaderOnly  = VolumeAccessMode(csipbv1.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY)
	VolumeAccessModeMultiNodeReaderOnly   = VolumeAccessMode(csipbv1.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY)
	VolumeAccessModeMultiNodeSingleWriter = VolumeAccessMode(csipbv1.VolumeCapability_AccessMode_MULTI_NODE_SINGLE_WRITER)
	VolumeAccessModeMultiNodeMultiWriter  = VolumeAccessMode(csipbv1.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER)
)

Functions

This section is empty.

Types

type CSIControllerClient 

type CSIControllerClient interface {
	ControllerGetCapabilities(ctx context.Context, in *csipbv1.ControllerGetCapabilitiesRequest, opts ...grpc.CallOption) (*csipbv1.ControllerGetCapabilitiesResponse, error)
	ControllerPublishVolume(ctx context.Context, in *csipbv1.ControllerPublishVolumeRequest, opts ...grpc.CallOption) (*csipbv1.ControllerPublishVolumeResponse, error)
	ControllerUnpublishVolume(ctx context.Context, in *csipbv1.ControllerUnpublishVolumeRequest, opts ...grpc.CallOption) (*csipbv1.ControllerUnpublishVolumeResponse, error)
	ValidateVolumeCapabilities(ctx context.Context, in *csipbv1.ValidateVolumeCapabilitiesRequest, opts ...grpc.CallOption) (*csipbv1.ValidateVolumeCapabilitiesResponse, error)
}

CSIControllerClient defines the minimal CSI Controller Plugin interface used by nomad to simplify the interface required for testing.

type CSINodeClient 

type CSINodeClient interface {
	NodeGetCapabilities(ctx context.Context, in *csipbv1.NodeGetCapabilitiesRequest, opts ...grpc.CallOption) (*csipbv1.NodeGetCapabilitiesResponse, error)
	NodeGetInfo(ctx context.Context, in *csipbv1.NodeGetInfoRequest, opts ...grpc.CallOption) (*csipbv1.NodeGetInfoResponse, error)
	NodeStageVolume(ctx context.Context, in *csipbv1.NodeStageVolumeRequest, opts ...grpc.CallOption) (*csipbv1.NodeStageVolumeResponse, error)
	NodeUnstageVolume(ctx context.Context, in *csipbv1.NodeUnstageVolumeRequest, opts ...grpc.CallOption) (*csipbv1.NodeUnstageVolumeResponse, error)
	NodePublishVolume(ctx context.Context, in *csipbv1.NodePublishVolumeRequest, opts ...grpc.CallOption) (*csipbv1.NodePublishVolumeResponse, error)
	NodeUnpublishVolume(ctx context.Context, in *csipbv1.NodeUnpublishVolumeRequest, opts ...grpc.CallOption) (*csipbv1.NodeUnpublishVolumeResponse, error)
}

CSINodeClient defines the minimal CSI Node Plugin interface used by nomad to simplify the interface required for testing.

type CSIPlugin 

type CSIPlugin interface {
	base.BasePlugin

	// PluginProbe is used to verify that the plugin is in a healthy state
	PluginProbe(ctx context.Context) (bool, error)

	// PluginGetInfo is used to return semantic data about the plugin.
	// Response:
	//  - string: name, the name of the plugin in domain notation format.
	//  - string: version, the vendor version of the plugin
	PluginGetInfo(ctx context.Context) (string, string, error)

	// PluginGetCapabilities is used to return the available capabilities from the
	// identity service. This currently only looks for the CONTROLLER_SERVICE and
	// Accessible Topology Support
	PluginGetCapabilities(ctx context.Context) (*PluginCapabilitySet, error)

	// GetControllerCapabilities is used to get controller-specific capabilities
	// for a plugin.
	ControllerGetCapabilities(ctx context.Context) (*ControllerCapabilitySet, error)

	// ControllerPublishVolume is used to attach a remote volume to a cluster node.
	ControllerPublishVolume(ctx context.Context, req *ControllerPublishVolumeRequest, opts ...grpc.CallOption) (*ControllerPublishVolumeResponse, error)

	// ControllerUnpublishVolume is used to deattach a remote volume from a cluster node.
	ControllerUnpublishVolume(ctx context.Context, req *ControllerUnpublishVolumeRequest, opts ...grpc.CallOption) (*ControllerUnpublishVolumeResponse, error)

	// ControllerValidateCapabilities is used to validate that a volume exists and
	// supports the requested capability.
	ControllerValidateCapabilities(ctx context.Context, volumeID string, capabilities *VolumeCapability, secrets structs.CSISecrets, opts ...grpc.CallOption) error

	// NodeGetCapabilities is used to return the available capabilities from the
	// Node Service.
	NodeGetCapabilities(ctx context.Context) (*NodeCapabilitySet, error)

	// NodeGetInfo is used to return semantic data about the current node in
	// respect to the SP.
	NodeGetInfo(ctx context.Context) (*NodeGetInfoResponse, error)

	// NodeStageVolume is used when a plugin has the STAGE_UNSTAGE volume capability
	// to prepare a volume for usage on a host. If err == nil, the response should
	// be assumed to be successful.
	NodeStageVolume(ctx context.Context, volumeID string, publishContext map[string]string, stagingTargetPath string, capabilities *VolumeCapability, secrets structs.CSISecrets, opts ...grpc.CallOption) error

	// NodeUnstageVolume is used when a plugin has the STAGE_UNSTAGE volume capability
	// to undo the work performed by NodeStageVolume. If a volume has been staged,
	// this RPC must be called before freeing the volume.
	//
	// If err == nil, the response should be assumed to be successful.
	NodeUnstageVolume(ctx context.Context, volumeID string, stagingTargetPath string, opts ...grpc.CallOption) error

	// NodePublishVolume is used to prepare a volume for use by an allocation.
	// if err == nil the response should be assumed to be successful.
	NodePublishVolume(ctx context.Context, req *NodePublishVolumeRequest, opts ...grpc.CallOption) error

	// NodeUnpublishVolume is used to cleanup usage of a volume for an alloc. This
	// MUST be called before calling NodeUnstageVolume or ControllerUnpublishVolume
	// for the given volume.
	NodeUnpublishVolume(ctx context.Context, volumeID, targetPath string, opts ...grpc.CallOption) error

	// Shutdown the client and ensure any connections are cleaned up.
	Close() error
}

CSIPlugin implements a lightweight abstraction layer around a CSI Plugin. It validates that responses from storage providers (SP's), correctly conform to the specification before returning response data or erroring.

func NewClient 

func NewClient(addr string, logger hclog.Logger) (CSIPlugin, error)

type ControllerCapabilitySet 

type ControllerCapabilitySet struct {
	HasPublishUnpublishVolume    bool
	HasPublishReadonly           bool
	HasListVolumes               bool
	HasListVolumesPublishedNodes bool
}

func NewControllerCapabilitySet 

func NewControllerCapabilitySet(resp *csipbv1.ControllerGetCapabilitiesResponse) *ControllerCapabilitySet

type ControllerPublishVolumeRequest 

type ControllerPublishVolumeRequest struct {
	ExternalID       string
	NodeID           string
	ReadOnly         bool
	VolumeCapability *VolumeCapability
	Secrets          structs.CSISecrets
}

func (*ControllerPublishVolumeRequest) ToCSIRepresentation 

func (r *ControllerPublishVolumeRequest) ToCSIRepresentation() *csipbv1.ControllerPublishVolumeRequest

func (*ControllerPublishVolumeRequest) Validate 

func (r *ControllerPublishVolumeRequest) Validate() error

type ControllerPublishVolumeResponse 

type ControllerPublishVolumeResponse struct {
	PublishContext map[string]string
}

type ControllerUnpublishVolumeRequest 

type ControllerUnpublishVolumeRequest struct {
	ExternalID string
	NodeID     string
	Secrets    structs.CSISecrets
}

func (*ControllerUnpublishVolumeRequest) ToCSIRepresentation 

func (r *ControllerUnpublishVolumeRequest) ToCSIRepresentation() *csipbv1.ControllerUnpublishVolumeRequest

func (*ControllerUnpublishVolumeRequest) Validate 

func (r *ControllerUnpublishVolumeRequest) Validate() error

type ControllerUnpublishVolumeResponse 

type ControllerUnpublishVolumeResponse struct{}

type NodeCapabilitySet 

type NodeCapabilitySet struct {
	HasStageUnstageVolume bool
}

func NewNodeCapabilitySet 

func NewNodeCapabilitySet(resp *csipbv1.NodeGetCapabilitiesResponse) *NodeCapabilitySet

type NodeGetInfoResponse 

type NodeGetInfoResponse struct {
	NodeID             string
	MaxVolumes         int64
	AccessibleTopology *Topology
}

type NodePublishVolumeRequest 

type NodePublishVolumeRequest struct {
	// The external ID of the volume to publish.
	ExternalID string

	// If the volume was attached via a call to `ControllerPublishVolume` then
	// we need to provide the returned PublishContext here.
	PublishContext map[string]string

	// The path to which the volume was staged by `NodeStageVolume`.
	// It MUST be an absolute path in the root filesystem of the process
	// serving this request.
	// E.g {the plugins internal mount path}/staging/volumeid/...
	//
	// It MUST be set if the Node Plugin implements the
	// `STAGE_UNSTAGE_VOLUME` node capability.
	StagingTargetPath string

	// The path to which the volume will be published.
	// It MUST be an absolute path in the root filesystem of the process serving this
	// request.
	// E.g {the plugins internal mount path}/per-alloc/allocid/volumeid/...
	//
	// The CO SHALL ensure uniqueness of target_path per volume.
	// The CO SHALL ensure that the parent directory of this path exists
	// and that the process serving the request has `read` and `write`
	// permissions to that parent directory.
	TargetPath string

	// Volume capability describing how the CO intends to use this volume.
	VolumeCapability *VolumeCapability

	Readonly bool

	// Secrets required by plugins to complete the node publish volume
	// request. This field is OPTIONAL.
	Secrets structs.CSISecrets
}

func (*NodePublishVolumeRequest) ToCSIRepresentation 

func (r *NodePublishVolumeRequest) ToCSIRepresentation() *csipbv1.NodePublishVolumeRequest

func (*NodePublishVolumeRequest) Validate 

func (r *NodePublishVolumeRequest) Validate() error

type PluginCapabilitySet 

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

func NewPluginCapabilitySet 

func NewPluginCapabilitySet(capabilities *csipbv1.GetPluginCapabilitiesResponse) *PluginCapabilitySet

func NewTestPluginCapabilitySet 

func NewTestPluginCapabilitySet(topologies, controller bool) *PluginCapabilitySet

func (*PluginCapabilitySet) HasControllerService 

func (p *PluginCapabilitySet) HasControllerService() bool

func (*PluginCapabilitySet) HasToplogies 

func (p *PluginCapabilitySet) HasToplogies() bool

HasTopologies indicates whether the volumes for this plugin are equally accessible by all nodes in the cluster. If true, we MUST use the topology information when scheduling workloads.

func (*PluginCapabilitySet) IsEqual 

func (p *PluginCapabilitySet) IsEqual(o *PluginCapabilitySet) bool

type Topology 

type Topology struct {
	Segments map[string]string
}

Topology is a map of topological domains to topological segments. A topological domain is a sub-division of a cluster, like "region", "zone", "rack", etc.

According to CSI, there are a few requirements for the keys within this map:

  • Valid keys have two segments: an OPTIONAL prefix and name, separated by a slash (/), for example: "com.company.example/zone".
  • The key name segment is REQUIRED. The prefix is OPTIONAL.
  • The key name MUST be 63 characters or less, begin and end with an alphanumeric character ([a-z0-9A-Z]), and contain only dashes (-), underscores (_), dots (.), or alphanumerics in between, for example "zone".
  • The key prefix MUST be 63 characters or less, begin and end with a lower-case alphanumeric character ([a-z0-9]), contain only dashes (-), dots (.), or lower-case alphanumerics in between, and follow domain name notation format (https://tools.ietf.org/html/rfc1035#section-2.3.1).
  • The key prefix SHOULD include the plugin's host company name and/or the plugin name, to minimize the possibility of collisions with keys from other plugins.
  • If a key prefix is specified, it MUST be identical across all topology keys returned by the SP (across all RPCs).
  • Keys MUST be case-insensitive. Meaning the keys "Zone" and "zone" MUST not both exist.
  • Each value (topological segment) MUST contain 1 or more strings.
  • Each string MUST be 63 characters or less and begin and end with an alphanumeric character with '-', '_', '.', or alphanumerics in between.

type VolumeAccessMode 

type VolumeAccessMode csipbv1.VolumeCapability_AccessMode_Mode

VolumeAccessMode represents the desired access mode of the CSI Volume

func (VolumeAccessMode) String 

func (a VolumeAccessMode) String() string

func (VolumeAccessMode) ToCSIRepresentation 

func (a VolumeAccessMode) ToCSIRepresentation() csipbv1.VolumeCapability_AccessMode_Mode

type VolumeAccessType 

type VolumeAccessType int32

VolumeAccessType represents the filesystem apis that the user intends to use with the volume. E.g whether it will be used as a block device or if they wish to have a mounted filesystem. 

var (
	VolumeAccessTypeBlock VolumeAccessType = 1
	VolumeAccessTypeMount VolumeAccessType = 2
)

func (VolumeAccessType) String 

func (v VolumeAccessType) String() string

type VolumeCapability 

type VolumeCapability struct {
	AccessType VolumeAccessType
	AccessMode VolumeAccessMode

	// Indicate that the volume will be accessed via the filesystem API.
	MountVolume *structs.CSIMountOptions
}

VolumeCapability describes the overall usage requirements for a given CSI Volume

func VolumeCapabilityFromStructs 

func VolumeCapabilityFromStructs(sAccessType structs.CSIVolumeAttachmentMode, sAccessMode structs.CSIVolumeAccessMode) (*VolumeCapability, error)

func (*VolumeCapability) ToCSIRepresentation 

func (c *VolumeCapability) ToCSIRepresentation() *csipbv1.VolumeCapability

Source Files

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Directories

Path Synopsis
fake is a package that includes fake implementations of public interfaces from the CSI package for testing.
 fake is a package that includes fake implementations of public interfaces from the CSI package for testing.

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