instance

package
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 Go to latest Published: Jul 5, 2023 License: Apache-2.0 Imports: 45 Imported by: 0

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Index

Constants

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const (
	ConsoleTypeConsole = "console"
	ConsoleTypeVGA     = "vga"
)

Possible values for the protocol argument of the Instance.Console() method.

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const HookStart = "onstart"

HookStart hook used when instance has started.

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const HookStop = "onstop"

HookStop hook used when instance has stopped.

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const HookStopNS = "onstopns"

HookStopNS hook used when instance has stopped but before namespaces have been destroyed.

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const PowerStateRunning = "RUNNING"

PowerStateRunning represents the power state stored when an instance is running.

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const PowerStateStopped = "STOPPED"

PowerStateStopped represents the power state stored when an instance is stopped.

Variables

View Source 
var Create func(s *state.State, args db.InstanceArgs, p api.Project) (Instance, revert.Hook, error)

Create is linked from instance/drivers.create to allow difference instance types to be created. Returns a revert fail function that can be used to undo this function if a subsequent step fails.

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var ErrNotImplemented = fmt.Errorf("Not implemented")

ErrNotImplemented is the "Not implemented" error.

View Source 
var Load func(s *state.State, args db.InstanceArgs, p api.Project) (Instance, error)

Load is linked from instance/drivers.load to allow different instance types to be loaded.

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var ValidDevices func(state *state.State, p api.Project, instanceType instancetype.Type, localDevices deviceConfig.Devices, expandedDevices deviceConfig.Devices) error

ValidDevices is linked from instance/drivers.validDevices to validate device config.

Functions

func AllowedUnprivilegedOnlyMap 

func AllowedUnprivilegedOnlyMap(rawIdmap string) error

AllowedUnprivilegedOnlyMap checks that root user is not mapped into instance.

func BackupLoadByName 

func BackupLoadByName(s *state.State, project, name string) (*backup.InstanceBackup, error)

BackupLoadByName load an instance backup from the database.

func DeviceNextInterfaceHWAddr 

func DeviceNextInterfaceHWAddr() (string, error)

DeviceNextInterfaceHWAddr generates a random MAC address.

func FilterFull 

func FilterFull(instances []*api.InstanceFull, clauses filter.ClauseSet) ([]*api.InstanceFull, error)

FilterFull returns a filtered list of full instances that match the given clauses.

func IsSameLogicalInstance 

func IsSameLogicalInstance(inst Instance, dbInst *db.InstanceArgs) bool

IsSameLogicalInstance returns true if the supplied Instance and db.Instance have the same project and name or if they have the same volatile.uuid values.

func LoadInstanceDatabaseObject 

func LoadInstanceDatabaseObject(ctx context.Context, tx *db.ClusterTx, project, name string) (*cluster.Instance, error)

LoadInstanceDatabaseObject loads a db.Instance object, accounting for snapshots.

func MoveTemporaryName 

func MoveTemporaryName(inst Instance) (string, error)

MoveTemporaryName returns a name derived from the instance's volatile.uuid, to use when moving an instance across pools or cluster members which can be used for the naming the temporary copy before deleting the original instance and renaming the copy to the original name. If volatile.uuid is not set, a new UUID is generated and stored in the instance's config.

func NextSnapshotName 

func NextSnapshotName(s *state.State, inst Instance, defaultPattern string) (string, error)

NextSnapshotName finds the next snapshot for an instance.

func ResolveImage 

func ResolveImage(ctx context.Context, tx *db.ClusterTx, projectName string, source api.InstanceSource) (string, error)

ResolveImage takes an instance source and returns a hash suitable for instance creation or download.

func SnapshotProtobufToInstanceArgs 

func SnapshotProtobufToInstanceArgs(s *state.State, inst Instance, snap *migration.Snapshot) (*db.InstanceArgs, error)

SnapshotProtobufToInstanceArgs converts a migration snapshot record to DB instance record format.

func SnapshotToProtobuf 

func SnapshotToProtobuf(snap *api.InstanceSnapshot) *migration.Snapshot

SnapshotToProtobuf converts a snapshot record to a migration snapshot record.

func SuitableArchitectures 

func SuitableArchitectures(ctx context.Context, s *state.State, tx *db.ClusterTx, projectName string, sourceInst *cluster.Instance, sourceImageRef string, req api.InstancesPost) ([]int, error)

SuitableArchitectures returns a slice of architecture ids based on an instance create request.

An empty list indicates that the request may be handled by any architecture. A nil list indicates that we can't tell at this stage, typically for private images.

func ValidConfig 

func ValidConfig(sysOS *sys.OS, config map[string]string, expanded bool, instanceType instancetype.Type) error

ValidConfig validates an instance's config.

func ValidName 

func ValidName(instanceName string, isSnapshot bool) error

ValidName validates an instance name. There are different validation rules for instance snapshot names so it takes an argument indicating whether the name is to be used for a snapshot or not.

Types

type Cmd 

type Cmd interface {
	Wait() (int, error)
	PID() int
	Signal(s unix.Signal) error
	WindowResize(fd, winchWidth, winchHeight int) error
}

Cmd represents a local or remote command being run.

type ConfigReader 

type ConfigReader interface {
	Project() api.Project
	Type() instancetype.Type
	Architecture() int
	ExpandedConfig() map[string]string
	ExpandedDevices() deviceConfig.Devices
	LocalConfig() map[string]string
	LocalDevices() deviceConfig.Devices
}

ConfigReader is used to read instance config.

type Container 

type Container interface {
	Instance

	CurrentIdmap() (*idmap.IdmapSet, error)
	DiskIdmap() (*idmap.IdmapSet, error)
	NextIdmap() (*idmap.IdmapSet, error)
	ConsoleLog(opts liblxc.ConsoleLogOptions) (string, error)
	InsertSeccompUnixDevice(prefix string, m deviceConfig.Device, pid int) error
	DevptsFd() (*os.File, error)
	IdmappedStorage(path string, fstype string) idmap.IdmapStorageType
}

Container interface is for container specific functions.

type CriuMigrationArgs 

type CriuMigrationArgs struct {
	Cmd          uint
	StateDir     string
	Function     string
	Stop         bool
	ActionScript bool
	DumpDir      string
	PreDumpDir   string
	Features     liblxc.CriuFeatures
	Op           *operationlock.InstanceOperation
}

CriuMigrationArgs arguments for CRIU migration.

type Info 

type Info struct {
	Name     string            // Name of an instance driver, e.g. "lxc"
	Version  string            // Version number of a loaded instance driver
	Error    error             // Whether there is an operational impediment.
	Type     instancetype.Type // Instance type that the driver provides support for.
	Features map[string]any    // Map of supported features.
}

Info represents information about an instance driver.

type Instance 

type Instance interface {
	ConfigReader

	// Instance actions.
	Freeze() error
	Shutdown(timeout time.Duration) error
	Start(stateful bool) error
	Stop(stateful bool) error
	Restart(timeout time.Duration) error
	Rebuild(img *api.Image, op *operations.Operation) error
	Unfreeze() error
	RegisterDevices()

	Info() Info
	IsPrivileged() bool

	// Snapshots & migration & backups.
	Restore(source Instance, stateful bool) error
	Snapshot(name string, expiry time.Time, stateful bool) error
	Snapshots() ([]Instance, error)
	Backups() ([]backup.InstanceBackup, error)
	UpdateBackupFile() error

	// Config handling.
	Rename(newName string, applyTemplateTrigger bool) error
	Update(newConfig db.InstanceArgs, userRequested bool) error

	Delete(force bool) error
	Export(w io.Writer, properties map[string]string, expiration time.Time) (api.ImageMetadata, error)

	// Live configuration.
	CGroup() (*cgroup.CGroup, error)
	VolatileSet(changes map[string]string) error

	// File handling.
	FileSFTPConn() (net.Conn, error)
	FileSFTP() (*sftp.Client, error)

	// Console - Allocate and run a console tty or a spice Unix socket.
	Console(protocol string) (*os.File, chan error, error)
	Exec(req api.InstanceExecPost, stdin *os.File, stdout *os.File, stderr *os.File) (Cmd, error)

	// Status
	Render(options ...func(response any) error) (any, any, error)
	RenderFull(hostInterfaces []net.Interface) (*api.InstanceFull, any, error)
	RenderState(hostInterfaces []net.Interface) (*api.InstanceState, error)
	IsRunning() bool
	IsFrozen() bool
	IsEphemeral() bool
	IsSnapshot() bool
	IsStateful() bool
	LockExclusive() (*operationlock.InstanceOperation, error)

	// Hooks.
	DeviceEventHandler(*deviceConfig.RunConfig) error
	OnHook(hookName string, args map[string]string) error

	// Properties.
	ID() int
	Location() string
	Name() string
	CloudInitID() string
	Description() string
	CreationDate() time.Time
	LastUsedDate() time.Time

	Profiles() []api.Profile
	InitPID() int
	State() string
	ExpiryDate() time.Time
	FillNetworkDevice(name string, m deviceConfig.Device) (deviceConfig.Device, error)

	// Paths.
	Path() string
	ExecOutputPath() string
	RootfsPath() string
	TemplatesPath() string
	StatePath() string
	LogFilePath() string
	ConsoleBufferLogPath() string
	LogPath() string
	DevicesPath() string

	// Storage.
	StoragePool() (string, error)

	// Migration.
	CanMigrate() (bool, bool)
	MigrateSend(args MigrateSendArgs) error
	MigrateReceive(args MigrateReceiveArgs) error

	// Progress reporting.
	SetOperation(op *operations.Operation)
	Operation() *operations.Operation

	DeferTemplateApply(trigger TemplateTrigger) error

	Metrics(hostInterfaces []net.Interface) (*metrics.MetricSet, error)
}

Instance interface.

func CreateInternal 

func CreateInternal(s *state.State, args db.InstanceArgs, clearLogDir bool) (Instance, *operationlock.InstanceOperation, revert.Hook, error)

CreateInternal creates an instance record and storage volume record in the database and sets up devices. Accepts a reverter that revert steps this function does will be added to. It is up to the caller to call the revert's Fail() or Success() function as needed. Returns the created instance, along with a "create" operation lock that needs to be marked as Done once the instance is fully completed, and a revert fail function that can be used to undo this function if a subsequent step fails.

func LoadByID 

func LoadByID(s *state.State, id int) (Instance, error)

LoadByID loads an instance by ID.

func LoadByProjectAndName 

func LoadByProjectAndName(s *state.State, projectName string, instanceName string) (Instance, error)

LoadByProjectAndName loads an instance by project and name.

func LoadFromBackup 

func LoadFromBackup(s *state.State, projectName string, instancePath string, applyProfiles bool) (Instance, error)

LoadFromBackup loads from a mounted instance's backup file. If applyProfiles is false, then the profiles property will be cleared to prevent profile enrichment from DB. Then the expanded config and expanded devices from the backup file will be applied to the local config and local devices respectively. This is done to allow an expanded instance to be returned without needing the DB.

func LoadNodeAll 

func LoadNodeAll(s *state.State, instanceType instancetype.Type) ([]Instance, error)

LoadNodeAll loads all instances on this server.

type MigrateArgs 

type MigrateArgs struct {
	ControlSend           func(m proto.Message) error
	ControlReceive        func(m proto.Message) error
	StateConn             func(ctx context.Context) (io.ReadWriteCloser, error)
	FilesystemConn        func(ctx context.Context) (io.ReadWriteCloser, error)
	Snapshots             bool
	Live                  bool
	Disconnect            func()
	ClusterMoveSourceName string // Will be empty if not a cluster move, othwise indicates the source instance.
}

MigrateArgs represent arguments for instance migration send and receive.

type MigrateReceiveArgs 

type MigrateReceiveArgs struct {
	MigrateArgs

	InstanceOperation *operationlock.InstanceOperation
	Refresh           bool
}

MigrateReceiveArgs represent arguments for instance migration receive.

type MigrateSendArgs 

type MigrateSendArgs struct {
	MigrateArgs

	AllowInconsistent bool
}

MigrateSendArgs represent arguments for instance migration send.

type TemplateTrigger 

type TemplateTrigger string

TemplateTrigger trigger name. 

const TemplateTriggerCopy TemplateTrigger = "copy"

TemplateTriggerCopy for when an instance is copied. 

const TemplateTriggerCreate TemplateTrigger = "create"

TemplateTriggerCreate for when an instance is created. 

const TemplateTriggerRename TemplateTrigger = "rename"

TemplateTriggerRename for when an instance is renamed.

type VM 

type VM interface {
	Instance

	AgentCertificate() *x509.Certificate
}

VM interface is for VM specific functions.

Source Files

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Directories

Path Synopsis
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