types

Documentation

Index

• Constants
• func CombineErrors(errorList ...error) (retErr error)
• func GenerateFunctionErrorWithRollback(functionErr, rollbackErr error) error
• func IsAlreadyPurgingError(err error) bool
• func UnmarshalGRPCError(err error) error
• func WrapError(in error, format string, args ...interface{}) error
• type Backend
• type BackendFactory
• type Controller
• type ControllerReplicaInfo
• type DataProcessor
• type DiffDisk
• type DiskInfo
• type Error
  • func NewError(code ErrorCode, msg, rollbackMsg string) *Error
  • func (e *Error) Error() string
  • func (e *Error) ToJSONString() string
• type ErrorCode
• type Frontend
• type Metrics
• type Mode
• type MonitorChannel
• type PrepareRemoveAction
• type ProcessState
• type RWMetrics
• type ReaderWriterAt
• type Replica
• type ReplicaInfo
• type Server
• type State
• type SyncFileInfo
• type VolumeInfo

Constants

const (
	ErrorCodeResultUnknown                   = ErrorCode("ResultUnknown")
	ErrorCodeFunctionFailedWithoutRollback   = ErrorCode("FunctionFailedWithoutRollback")
	ErrorCodeFunctionFailedRollbackSucceeded = ErrorCode("FunctionFailedRollbackSucceeded")
	ErrorCodeFunctionFailedRollbackFailed    = ErrorCode("FunctionFailedRollbackFailed")
)

const (
	WO  = Mode("WO")
	RW  = Mode("RW")
	ERR = Mode("ERR")

	ProcessStateComplete   = ProcessState("complete")
	ProcessStateError      = ProcessState("error")
	ProcessStateInProgress = ProcessState("in_progress")

	StateUp   = State("up")
	StateDown = State("down")

	AWSAccessKey = "AWS_ACCESS_KEY_ID"
	AWSSecretKey = "AWS_SECRET_ACCESS_KEY"
	AWSEndPoint  = "AWS_ENDPOINTS"
	AWSCert      = "AWS_CERT"

	HTTPSProxy = "HTTPS_PROXY"
	HTTPProxy  = "HTTP_PROXY"
	NOProxy    = "NO_PROXY"

	RetryCounts   = 30
	RetryInterval = 1 * time.Second

	EngineFrontendBlockDev = "tgt-blockdev"
	EngineFrontendISCSI    = "tgt-iscsi"
)

const (
	EventTypeVolume  = "volume"
	EventTypeReplica = "replica"
	EventTypeMetrics = "metrics"
)

Functions

func CombineErrors

func CombineErrors(errorList ...error) (retErr error)

func GenerateFunctionErrorWithRollback

func GenerateFunctionErrorWithRollback(functionErr, rollbackErr error) error

func IsAlreadyPurgingError

func IsAlreadyPurgingError(err error) bool

func UnmarshalGRPCError

func UnmarshalGRPCError(err error) error

func WrapError

func WrapError(in error, format string, args ...interface{}) error

Types

type Backend

type Backend interface {
	ReaderWriterAt
	io.Closer
	Snapshot(name string, userCreated bool, created string, labels map[string]string) error
	Expand(size int64) error
	Size() (int64, error)
	SectorSize() (int64, error)
	RemainSnapshots() (int, error)
	GetRevisionCounter() (int64, error)
	SetRevisionCounter(counter int64) error
	GetMonitorChannel() MonitorChannel
	StopMonitoring()
}

type BackendFactory

type BackendFactory interface {
	Create(address string) (Backend, error)
}

type Controller

type Controller interface {
	AddReplica(address string) error
	RemoveReplica(address string) error
	SetReplicaMode(address string, mode Mode) error
	ListReplicas() []Replica
	Start(address ...string) error
	Shutdown() error
}

type ControllerReplicaInfo

type ControllerReplicaInfo struct {
	Address string `json:"address"`
	Mode    Mode   `json:"mode"`
}

type DataProcessor

type DataProcessor interface {
	ReaderWriterAt
	PingResponse() error
}

type DiffDisk

type DiffDisk interface {
	ReaderWriterAt
	io.Closer
	Fd() uintptr
	Size() (int64, error)
}

type DiskInfo

type DiskInfo struct {
	Name        string            `json:"name"`
	Parent      string            `json:"parent"`
	Children    map[string]bool   `json:"children"`
	Removed     bool              `json:"removed"`
	UserCreated bool              `json:"usercreated"`
	Created     string            `json:"created"`
	Size        string            `json:"size"`
	Labels      map[string]string `json:"labels"`
}

type Error

type Error struct {
	Code            ErrorCode `json:"code"`
	Message         string    `json:"message"`
	RollbackMessage string    `json:"rollbackMessage"`
}

func NewError

func NewError(code ErrorCode, msg, rollbackMsg string) *Error

func (*Error) Error

func (e *Error) Error() string

func (*Error) ToJSONString

func (e *Error) ToJSONString() string

type ErrorCode

type ErrorCode string

type Frontend

type Frontend interface {
	FrontendName() string
	Init(name string, size, sectorSize int64) error
	Startup(rw ReaderWriterAt) error
	Shutdown() error
	State() State
	Endpoint() string
	Upgrade(name string, size, sectorSize int64, rw ReaderWriterAt) error
	Expand(size int64) error
}

type Metrics

type Metrics struct {
	Bandwidth    RWMetrics // in byte
	TotalLatency RWMetrics // in microsecond(us)
	IOPS         RWMetrics
}

type Mode

type Mode string

type MonitorChannel

type MonitorChannel chan error

type PrepareRemoveAction

type PrepareRemoveAction struct {
	Action string `json:"action"`
	Source string `json:"source"`
	Target string `json:"target"`
}

type ProcessState

type ProcessState string

type RWMetrics

type RWMetrics struct {
	Read  uint64
	Write uint64
}

type ReaderWriterAt

type ReaderWriterAt interface {
	io.ReaderAt
	io.WriterAt
}

type Replica

type Replica struct {
	Address string
	Mode    Mode
}

type ReplicaInfo

type ReplicaInfo struct {
	Dirty           bool                `json:"dirty"`
	Rebuilding      bool                `json:"rebuilding"`
	Head            string              `json:"head"`
	Parent          string              `json:"parent"`
	Size            string              `json:"size"`
	SectorSize      int64               `json:"sectorSize,string"`
	BackingFile     string              `json:"backingFile"`
	State           string              `json:"state"`
	Chain           []string            `json:"chain"`
	Disks           map[string]DiskInfo `json:"disks"`
	RemainSnapshots int                 `json:"remainsnapshots"`
	RevisionCounter int64               `json:"revisioncounter,string"`
}

type Server

type Server interface {
	ReaderWriterAt
	Controller
}

type State

type State string

type SyncFileInfo

type SyncFileInfo struct {
	FromFileName string `json:"fromFileName"`
	ToFileName   string `json:"toFileName"`
	ActualSize   int64  `json:"actualSize"`
}

type VolumeInfo

type VolumeInfo struct {
	Name                  string `json:"name"`
	Size                  int64  `json:"size"`
	ReplicaCount          int    `json:"replicaCount"`
	Endpoint              string `json:"endpoint"`
	Frontend              string `json:"frontend"`
	FrontendState         string `json:"frontendState"`
	IsExpanding           bool   `json:"isExpanding"`
	LastExpansionError    string `json:"lastExpansionError"`
	LastExpansionFailedAt string `json:"lastExpansionFailedAt"`
}