base

package
v1.0.48 Latest Latest
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 Go to latest Published: Feb 14, 2019 License: MIT Imports: 16 Imported by: 0

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Constants

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const (
	HTTPStatusOK       = 200
	MaxEventsBatchSize = 1000
)

Variables

This section is empty.

Functions

func FileExists added in v0.7.2 

func FileExists(fileName string) bool

func PrettifyDurationOutput 

func PrettifyDurationOutput(d time.Duration) string

func StringContainsAll added in v0.9.6 

func StringContainsAll(s string, substrings ...string) bool

StringContainsAll returns true if `s` contains all non empty given `substrings` The function returns `false` if no non-empty arguments are given.

func TouchFile added in v1.0.44 

func TouchFile(fileName string) error

func ValidateConnection added in v1.0.44 

func ValidateConnection(db *gosql.DB, connectionConfig *mysql.ConnectionConfig, migrationContext *MigrationContext) (string, error)

Types

type ContextConfig added in v0.7.16 

type ContextConfig struct {
	Client struct {
		User     string
		Password string
	}
	Osc struct {
		Chunk_Size            int64
		Max_Lag_Millis        int64
		Replication_Lag_Query string
		Max_Load              string
	}
}

type CutOver added in v0.8.3 

type CutOver int
const (
	CutOverAtomic CutOver = iota
	CutOverTwoStep
)

type LoadMap added in v0.9.6 

type LoadMap map[string]int64

LoadMap is a mapping of status variable & threshold e.g. [Threads_connected: 100, Threads_running: 50]

func NewLoadMap added in v0.9.6 

func NewLoadMap() LoadMap

func ParseLoadMap added in v0.9.6 

func ParseLoadMap(loadList string) (LoadMap, error)

NewLoadMap parses a `--*-load` flag (e.g. `--max-load`), which is in multiple key-value format, such as: 

'Threads_running=100,Threads_connected=500'

func (*LoadMap) Duplicate added in v0.9.6 

func (this *LoadMap) Duplicate() LoadMap

Duplicate creates a clone of this map

func (*LoadMap) String added in v0.9.6 

func (this *LoadMap) String() string

String() returns a string representation of this map

type MigrationContext 

type MigrationContext struct {
	Uuid string

	DatabaseName      string
	OriginalTableName string
	AlterStatement    string

	CountTableRows           bool
	ConcurrentCountTableRows bool
	AllowedRunningOnMaster   bool
	AllowedMasterMaster      bool
	SwitchToRowBinlogFormat  bool
	AssumeRBR                bool
	SkipForeignKeyChecks     bool
	NullableUniqueKeyAllowed bool
	ApproveRenamedColumns    bool
	SkipRenamedColumns       bool
	IsTungsten               bool
	DiscardForeignKeys       bool
	AliyunRDS                bool
	GoogleCloudPlatform      bool

	ConfigFile        string
	CliUser           string
	CliPassword       string
	UseTLS            bool
	TLSAllowInsecure  bool
	TLSCACertificate  string
	CliMasterUser     string
	CliMasterPassword string

	HeartbeatIntervalMilliseconds int64

	ChunkSize int64

	MaxLagMillisecondsThrottleThreshold int64

	ThrottleFlagFile           string
	ThrottleAdditionalFlagFile string

	ThrottleCommandedByUser int64
	HibernateUntil          int64

	CriticalLoadIntervalMilliseconds int64
	CriticalLoadHibernateSeconds     int64
	PostponeCutOverFlagFile          string
	CutOverLockTimeoutSeconds        int64
	CutOverExponentialBackoff        bool
	ExponentialBackoffMaxInterval    int64
	ForceNamedCutOverCommand         bool
	PanicFlagFile                    string
	HooksPath                        string
	HooksHintMessage                 string
	HooksHintOwner                   string
	HooksHintToken                   string

	DropServeSocket bool
	ServeSocketFile string
	ServeTCPPort    int64

	Noop                         bool
	TestOnReplica                bool
	MigrateOnReplica             bool
	TestOnReplicaSkipReplicaStop bool
	OkToDropTable                bool
	InitiallyDropOldTable        bool
	InitiallyDropGhostTable      bool
	TimestampOldTable            bool // Should old table name include a timestamp
	CutOverType                  CutOver
	ReplicaServerId              uint

	Hostname                  string
	AssumeMasterHostname      string
	ApplierTimeZone           string
	TableEngine               string
	RowsEstimate              int64
	RowsDeltaEstimate         int64
	UsedRowsEstimateMethod    RowsEstimateMethod
	HasSuperPrivilege         bool
	OriginalBinlogFormat      string
	OriginalBinlogRowImage    string
	InspectorConnectionConfig *mysql.ConnectionConfig
	InspectorMySQLVersion     string
	ApplierConnectionConfig   *mysql.ConnectionConfig
	ApplierMySQLVersion       string
	StartTime                 time.Time
	RowCopyStartTime          time.Time
	RowCopyEndTime            time.Time
	LockTablesStartTime       time.Time
	RenameTablesStartTime     time.Time
	RenameTablesEndTime       time.Time

	CurrentLag             int64
	ThrottleHTTPStatusCode int64

	TotalRowsCopied       int64
	TotalDMLEventsApplied int64
	DMLBatchSize          int64

	IsPostponingCutOver                    int64
	CountingRowsFlag                       int64
	AllEventsUpToLockProcessedInjectedFlag int64
	CleanupImminentFlag                    int64
	UserCommandedUnpostponeFlag            int64
	CutOverCompleteFlag                    int64
	InCutOverCriticalSectionFlag           int64
	PanicAbort                             chan error

	OriginalTableColumnsOnApplier    *sql.ColumnList
	OriginalTableColumns             *sql.ColumnList
	OriginalTableVirtualColumns      *sql.ColumnList
	OriginalTableUniqueKeys          [](*sql.UniqueKey)
	GhostTableColumns                *sql.ColumnList
	GhostTableVirtualColumns         *sql.ColumnList
	GhostTableUniqueKeys             [](*sql.UniqueKey)
	UniqueKey                        *sql.UniqueKey
	SharedColumns                    *sql.ColumnList
	ColumnRenameMap                  map[string]string
	DroppedColumnsMap                map[string]bool
	MappedSharedColumns              *sql.ColumnList
	MigrationRangeMinValues          *sql.ColumnValues
	MigrationRangeMaxValues          *sql.ColumnValues
	Iteration                        int64
	MigrationIterationRangeMinValues *sql.ColumnValues
	MigrationIterationRangeMaxValues *sql.ColumnValues
	ForceTmpTableName                string
	// contains filtered or unexported fields
}

MigrationContext has the general, global state of migration. It is used by all components throughout the migration process.

func NewMigrationContext added in v1.0.44 

func NewMigrationContext() *MigrationContext

func (*MigrationContext) AddThrottleControlReplicaKey added in v1.0.6 

func (this *MigrationContext) AddThrottleControlReplicaKey(key mysql.InstanceKey) error

func (*MigrationContext) ApplyCredentials added in v0.7.16 

func (this *MigrationContext) ApplyCredentials()

ApplyCredentials sorts out the credentials between the config file and the CLI flags

func (*MigrationContext) ElapsedRowCopyTime 

func (this *MigrationContext) ElapsedRowCopyTime() time.Duration

ElapsedRowCopyTime returns time since starting to copy chunks of rows

func (*MigrationContext) ElapsedTime 

func (this *MigrationContext) ElapsedTime() time.Duration

ElapsedTime returns time since very beginning of the process

func (*MigrationContext) GetApplierHostname added in v1.0.21 

func (this *MigrationContext) GetApplierHostname() string

GetApplierHostname is a safe access method to the applier hostname

func (*MigrationContext) GetChangelogTableName 

func (this *MigrationContext) GetChangelogTableName() string

GetChangelogTableName generates the name of changelog table, based on original table name or a given table name.

func (*MigrationContext) GetControlReplicasLagResult added in v1.0.17 

func (this *MigrationContext) GetControlReplicasLagResult() mysql.ReplicationLagResult

func (*MigrationContext) GetCriticalLoad added in v0.9.6 

func (this *MigrationContext) GetCriticalLoad() LoadMap

func (*MigrationContext) GetGhostTableName 

func (this *MigrationContext) GetGhostTableName() string

GetGhostTableName generates the name of ghost table, based on original table name or a given table name

func (*MigrationContext) GetInspectorHostname added in v1.0.21 

func (this *MigrationContext) GetInspectorHostname() string

GetInspectorHostname is a safe access method to the inspector hostname

func (*MigrationContext) GetIteration 

func (this *MigrationContext) GetIteration() int64

func (*MigrationContext) GetMaxLoad added in v0.8.8 

func (this *MigrationContext) GetMaxLoad() LoadMap

func (*MigrationContext) GetNiceRatio added in v1.0.7 

func (this *MigrationContext) GetNiceRatio() float64

func (*MigrationContext) GetOldTableName 

func (this *MigrationContext) GetOldTableName() string

GetOldTableName generates the name of the "old" table, into which the original table is renamed.

func (*MigrationContext) GetRecentBinlogCoordinates added in v1.0.40 

func (this *MigrationContext) GetRecentBinlogCoordinates() mysql.BinlogCoordinates

func (*MigrationContext) GetThrottleControlReplicaKeys added in v0.9.6 

func (this *MigrationContext) GetThrottleControlReplicaKeys() *mysql.InstanceKeyMap

func (*MigrationContext) GetThrottleGeneralCheckResult added in v1.0.17 

func (this *MigrationContext) GetThrottleGeneralCheckResult() *ThrottleCheckResult

func (*MigrationContext) GetThrottleHTTP added in v1.0.36 

func (this *MigrationContext) GetThrottleHTTP() string

func (*MigrationContext) GetThrottleQuery added in v0.9.6 

func (this *MigrationContext) GetThrottleQuery() string

func (*MigrationContext) GetTotalRowsCopied 

func (this *MigrationContext) GetTotalRowsCopied() int64

GetTotalRowsCopied returns the accurate number of rows being copied (affected) This is not exactly the same as the rows being iterated via chunks, but potentially close enough

func (*MigrationContext) GetVoluntaryLockName 

func (this *MigrationContext) GetVoluntaryLockName() string

GetVoluntaryLockName returns a name of a voluntary lock to be used throughout the swap-tables process.

func (*MigrationContext) HasMigrationRange 

func (this *MigrationContext) HasMigrationRange() bool

HasMigrationRange tells us whether there's a range to iterate for copying rows. It will be `false` if the table is initially empty

func (*MigrationContext) InspectorIsAlsoApplier 

func (this *MigrationContext) InspectorIsAlsoApplier() bool

InspectorIsAlsoApplier is `true` when the both inspector and applier are the same database instance. This would be true when running directly on master or when testing on replica.

func (*MigrationContext) IsThrottled 

func (this *MigrationContext) IsThrottled() (bool, string, ThrottleReasonHint)

func (*MigrationContext) IsTransactionalTable 

func (this *MigrationContext) IsTransactionalTable() bool

func (*MigrationContext) MarkPointOfInterest added in v0.8.2 

func (this *MigrationContext) MarkPointOfInterest() int64

func (*MigrationContext) MarkRowCopyEndTime added in v0.9.6 

func (this *MigrationContext) MarkRowCopyEndTime()

ElapsedRowCopyTime returns time since starting to copy chunks of rows

func (*MigrationContext) MarkRowCopyStartTime added in v1.0.7 

func (this *MigrationContext) MarkRowCopyStartTime()

MarkRowCopyStartTime

func (*MigrationContext) MaxRetries 

func (this *MigrationContext) MaxRetries() int64

func (*MigrationContext) ReadConfigFile 

func (this *MigrationContext) ReadConfigFile() error

ReadConfigFile attempts to read the config file, if it exists

func (*MigrationContext) ReadCriticalLoad added in v0.9.6 

func (this *MigrationContext) ReadCriticalLoad(criticalLoadList string) error

ReadMaxLoad parses the `--max-load` flag, which is in multiple key-value format, such as: 'Threads_running=100,Threads_connected=500' It only applies changes in case there's no parsing error.

func (*MigrationContext) ReadMaxLoad 

func (this *MigrationContext) ReadMaxLoad(maxLoadList string) error

ReadMaxLoad parses the `--max-load` flag, which is in multiple key-value format, such as: 'Threads_running=100,Threads_connected=500' It only applies changes in case there's no parsing error.

func (*MigrationContext) ReadThrottleControlReplicaKeys added in v0.9.6 

func (this *MigrationContext) ReadThrottleControlReplicaKeys(throttleControlReplicas string) error

func (*MigrationContext) RequiresBinlogFormatChange 

func (this *MigrationContext) RequiresBinlogFormatChange() bool

RequiresBinlogFormatChange is `true` when the original binlog format isn't `ROW`

func (*MigrationContext) SetChunkSize added in v0.8.4 

func (this *MigrationContext) SetChunkSize(chunkSize int64)

func (*MigrationContext) SetControlReplicasLagResult added in v1.0.17 

func (this *MigrationContext) SetControlReplicasLagResult(lagResult *mysql.ReplicationLagResult)

func (*MigrationContext) SetCutOverLockTimeoutSeconds added in v1.0.1 

func (this *MigrationContext) SetCutOverLockTimeoutSeconds(timeoutSeconds int64) error

func (*MigrationContext) SetDMLBatchSize added in v1.0.34 

func (this *MigrationContext) SetDMLBatchSize(batchSize int64)

func (*MigrationContext) SetDefaultNumRetries added in v0.9.6 

func (this *MigrationContext) SetDefaultNumRetries(retries int64)

func (*MigrationContext) SetExponentialBackoffMaxInterval added in v1.0.45 

func (this *MigrationContext) SetExponentialBackoffMaxInterval(intervalSeconds int64) error

func (*MigrationContext) SetHeartbeatIntervalMilliseconds added in v1.0.17 

func (this *MigrationContext) SetHeartbeatIntervalMilliseconds(heartbeatIntervalMilliseconds int64)

func (*MigrationContext) SetMaxLagMillisecondsThrottleThreshold added in v1.0.2 

func (this *MigrationContext) SetMaxLagMillisecondsThrottleThreshold(maxLagMillisecondsThrottleThreshold int64)

func (*MigrationContext) SetNiceRatio added in v1.0.7 

func (this *MigrationContext) SetNiceRatio(newRatio float64)

func (*MigrationContext) SetRecentBinlogCoordinates added in v1.0.40 

func (this *MigrationContext) SetRecentBinlogCoordinates(coordinates mysql.BinlogCoordinates)

func (*MigrationContext) SetThrottleGeneralCheckResult added in v1.0.17 

func (this *MigrationContext) SetThrottleGeneralCheckResult(checkResult *ThrottleCheckResult) *ThrottleCheckResult

func (*MigrationContext) SetThrottleHTTP added in v1.0.36 

func (this *MigrationContext) SetThrottleHTTP(throttleHTTP string)

func (*MigrationContext) SetThrottleQuery added in v0.9.6 

func (this *MigrationContext) SetThrottleQuery(newQuery string)

func (*MigrationContext) SetThrottled 

func (this *MigrationContext) SetThrottled(throttle bool, reason string, reasonHint ThrottleReasonHint)

func (*MigrationContext) SetupTLS added in v1.0.48 

func (this *MigrationContext) SetupTLS() error

func (*MigrationContext) TimeSincePointOfInterest added in v0.8.2 

func (this *MigrationContext) TimeSincePointOfInterest() time.Duration

type RowsEstimateMethod 

type RowsEstimateMethod string

RowsEstimateMethod is the type of row number estimation 

const (
	TableStatusRowsEstimate RowsEstimateMethod = "TableStatusRowsEstimate"
	ExplainRowsEstimate     RowsEstimateMethod = "ExplainRowsEstimate"
	CountRowsEstimate       RowsEstimateMethod = "CountRowsEstimate"
)

type ThrottleCheckResult added in v1.0.17 

type ThrottleCheckResult struct {
	ShouldThrottle bool
	Reason         string
	ReasonHint     ThrottleReasonHint
}

func NewThrottleCheckResult added in v1.0.17 

func NewThrottleCheckResult(throttle bool, reason string, reasonHint ThrottleReasonHint) *ThrottleCheckResult

type ThrottleReasonHint added in v1.0.28 

type ThrottleReasonHint string
const (
	NoThrottleReasonHint                 ThrottleReasonHint = "NoThrottleReasonHint"
	UserCommandThrottleReasonHint        ThrottleReasonHint = "UserCommandThrottleReasonHint"
	LeavingHibernationThrottleReasonHint ThrottleReasonHint = "LeavingHibernationThrottleReasonHint"
)

Source Files

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