actionnode

package
v2.0.0-beta.1+incompat... Latest Latest
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 Go to latest Published: Mar 3, 2016 License: BSD-3-Clause Imports: 11 Imported by: 0

Documentation

Index

Constants

View Source 
const (

	// TabletActionPing checks a tablet is alive
	TabletActionPing = "Ping"

	// TabletActionSleep will sleep for a duration (used for tests)
	TabletActionSleep = "Sleep"

	// TabletActionExecuteHook will execute the provided hook remotely
	TabletActionExecuteHook = "ExecuteHook"

	// TabletActionSetReadOnly makes the mysql instance read-only
	TabletActionSetReadOnly = "SetReadOnly"

	// TabletActionSetReadWrite makes the mysql instance read-write
	TabletActionSetReadWrite = "SetReadWrite"

	// TabletActionChangeType changes the type of the tablet
	TabletActionChangeType = "ChangeType"

	// TabletActionResetReplication tells the tablet it should
	// reset its replication state
	TabletActionResetReplication = "ResetReplication"

	// TabletActionInitMaster tells the tablet it should make itself the new
	// master for the shard it's currently in.
	TabletActionInitMaster = "InitMaster"

	// TabletActionPopulateReparentJournal inserts an entry in the
	// _vt.reparent_journal table
	TabletActionPopulateReparentJournal = "PopulateReparentJournal"

	// TabletActionInitSlave tells the tablet it should make
	// itself a slave to the provided master at the given position.
	TabletActionInitSlave = "InitSlave"

	// TabletActionDemoteMaster tells the current master it's
	// about to not be a master any more, and should go read-only.
	TabletActionDemoteMaster = "DemoteMaster"

	// TabletActionPromoteSlaveWhenCaughtUp tells the tablet to wait
	// for a given replication point, and when it reaches it
	// switch to be a master.
	TabletActionPromoteSlaveWhenCaughtUp = "PromoteSlaveWhenCaughtUp"

	// TabletActionSlaveWasPromoted tells a tablet this previously slave
	// tablet is now the master. The tablet will update its
	// own topology record.
	TabletActionSlaveWasPromoted = "SlaveWasPromoted"

	// TabletActionSetMaster tells a tablet it has a new master.
	// The tablet will reparent to the new master, and wait for
	// the reparent_journal entry.
	TabletActionSetMaster = "SetMaster"

	// TabletActionSlaveWasRestarted tells a tablet the mysql
	// master was changed.  The tablet will check it is indeed the
	// case, and update its own topology record.
	TabletActionSlaveWasRestarted = "SlaveWasRestarted"

	// TabletActionStopReplicationAndGetStatus will stop replication,
	// and return the current replication status.
	TabletActionStopReplicationAndGetStatus = "StopReplicationAndGetStatus"

	// TabletActionPromoteSlave will make this tablet the master
	TabletActionPromoteSlave = "PromoteSlave"

	// TabletActionStopSlave will stop MySQL replication.
	TabletActionStopSlave = "StopSlave"

	// TabletActionStopSlaveMinimum will stop MySQL replication
	// after it reaches a minimum point.
	TabletActionStopSlaveMinimum = "StopSlaveMinimum"

	// TabletActionStartSlave will start MySQL replication.
	TabletActionStartSlave = "StartSlave"

	// TabletActionExternallyReparented is sent directly to the new master
	// tablet when it becomes the master. It is functionnaly equivalent
	// to calling "ShardExternallyReparented" on the topology.
	TabletActionExternallyReparented = "TabletExternallyReparented"

	// TabletActionMasterPosition returns the current master position
	TabletActionMasterPosition = "MasterPosition"

	// TabletActionSlaveStatus returns the current slave status
	TabletActionSlaveStatus = "SlaveStatus"

	// TabletActionWaitBLPPosition waits until the slave reaches a
	// replication position in filtered replication
	TabletActionWaitBLPPosition = "WaitBlpPosition"

	// TabletActionStopBLP stops filtered replication
	TabletActionStopBLP = "StopBlp"

	// TabletActionStartBLP starts filtered replication
	TabletActionStartBLP = "StartBlp"

	// TabletActionRunBLPUntil will run filtered replication until
	// it reaches the provided stop position.
	TabletActionRunBLPUntil = "RunBlpUntil"

	// TabletActionGetSchema returns the tablet current schema.
	TabletActionGetSchema = "GetSchema"

	// TabletActionRefreshState tells the tablet to refresh its
	// tablet record from the topo server.
	TabletActionRefreshState = "RefreshState"

	// TabletActionRunHealthCheck tells the tablet to refresh its
	// tablet record from the topo server.
	TabletActionRunHealthCheck = "RunHealthCheck"

	// TabletActionReloadSchema tells the tablet to reload its schema.
	TabletActionReloadSchema = "ReloadSchema"

	// TabletActionPreflightSchema will check a schema change works
	TabletActionPreflightSchema = "PreflightSchema"

	// TabletActionApplySchema will actually apply the schema change
	TabletActionApplySchema = "ApplySchema"

	// TabletActionExecuteFetchAsDba uses the DBA connection to run queries.
	TabletActionExecuteFetchAsDba = "ExecuteFetchAsDba"

	// TabletActionExecuteFetchAsApp uses the App connection to run queries.
	TabletActionExecuteFetchAsApp = "ExecuteFetchAsApp"

	// TabletActionGetPermissions returns the mysql permissions set
	TabletActionGetPermissions = "GetPermissions"

	// TabletActionGetSlaves returns the current set of mysql
	// replication slaves.
	TabletActionGetSlaves = "GetSlaves"

	// TabletActionBackup takes a db backup and stores it into BackupStorage
	TabletActionBackup = "Backup"

	// ShardActionReparent handles reparenting of the shard
	ShardActionReparent = "ReparentShard"

	// ShardActionExternallyReparented locks the shard when it's
	// been reparented
	ShardActionExternallyReparented = "ShardExternallyReparented"

	// ShardActionRebuild recomputes derived shard-wise data
	ShardActionRebuild = "RebuildShard"

	// ShardActionCheck takes a generic read lock for inexpensive
	// shard-wide actions.
	ShardActionCheck = "CheckShard"

	// ShardActionSetServedTypes changes the ServedTypes inside a shard
	ShardActionSetServedTypes = "SetShardServedTypes"

	// ShardActionMigrateServedTypes migratew served types from
	// one shard to another
	ShardActionMigrateServedTypes = "MigrateServedTypes"

	// ShardActionUpdateShard updates the Shard object (Cells, ...)
	ShardActionUpdateShard = "UpdateShard"

	// KeyspaceActionRebuild rebuilds the keyspace serving graph
	KeyspaceActionRebuild = "RebuildKeyspace"

	// KeyspaceActionApplySchema applies a schema change on the keyspace
	KeyspaceActionApplySchema = "ApplySchemaKeyspace"

	// KeyspaceActionSetShardingInfo updates the sharding info
	KeyspaceActionSetShardingInfo = "SetKeyspaceShardingInfo"

	// KeyspaceActionMigrateServedFrom migrates ServedFrom to
	// another keyspace
	KeyspaceActionMigrateServedFrom = "MigrateServedFrom"

	// KeyspaceActionSetServedFrom updates ServedFrom
	KeyspaceActionSetServedFrom = "SetKeyspaceServedFrom"

	// KeyspaceActionCreateShard protects shard creation within the keyspace
	KeyspaceActionCreateShard = "KeyspaceCreateShard"

	// SrvShardActionRebuild locks the SvrShard for rebuild
	SrvShardActionRebuild = "RebuildSrvShard"

	// ActionStateQueued is for an action that is going to be executed
	ActionStateQueued = ActionState("") // All actions are queued initially

	// ActionStateRunning is for an action that is running
	ActionStateRunning = ActionState("Running") // Running inside vtaction process

	// ActionStateFailed is for an action that has failed
	ActionStateFailed = ActionState("Failed") // Ended with a failure

	// ActionStateDone is for an action that is done and successful
	ActionStateDone = ActionState("Done") // Ended with no failure
)

Variables

View Source 
var (
	// DefaultLockTimeout is a good value to use as a default for
	// locking a shard / keyspace.
	DefaultLockTimeout = 30 * time.Second

	// LockTimeout is the command line flag that introduces a shorter
	// timeout for locking topology structures.
	LockTimeout = flag.Duration("lock_timeout", DefaultLockTimeout, "timeout for acquiring topology locks")
)

Functions

This section is empty.

Types

type ActionNode 

type ActionNode struct {
	Action     string
	ActionGuid string
	Error      string
	State      ActionState
	Pid        int // only != 0 if State == ActionStateRunning

	// do not serialize the next fields
	// path in topology server representing this action
	Path  string      `json:"-"`
	Args  interface{} `json:"-"`
	Reply interface{} `json:"-"`
}

ActionNode describes a long-running action on a tablet, or an action on a shard or keyspace that locks it.

func ApplySchemaKeyspace 

func ApplySchemaKeyspace(change string) *ActionNode

ApplySchemaKeyspace returns an ActionNode

func CheckShard 

func CheckShard() *ActionNode

CheckShard returns an ActionNode

func KeyspaceCreateShard 

func KeyspaceCreateShard() *ActionNode

KeyspaceCreateShard returns an ActionNode to use to lock a keyspace for shard creation

func MigrateServedFrom 

func MigrateServedFrom(servedType topodatapb.TabletType) *ActionNode

MigrateServedFrom returns an ActionNode

func MigrateServedTypes 

func MigrateServedTypes(servedType topodatapb.TabletType) *ActionNode

MigrateServedTypes returns an ActionNode

func RebuildKeyspace 

func RebuildKeyspace() *ActionNode

RebuildKeyspace returns an ActionNode

func RebuildShard 

func RebuildShard() *ActionNode

RebuildShard returns an ActionNode

func RebuildSrvShard 

func RebuildSrvShard() *ActionNode

RebuildSrvShard returns an ActionNode

func ReparentShard 

func ReparentShard(operation string, masterElectAlias *topodatapb.TabletAlias) *ActionNode

ReparentShard returns an ActionNode

func SetKeyspaceServedFrom 

func SetKeyspaceServedFrom() *ActionNode

SetKeyspaceServedFrom returns an ActionNode

func SetKeyspaceShardingInfo 

func SetKeyspaceShardingInfo() *ActionNode

SetKeyspaceShardingInfo returns an ActionNode

func SetShardServedTypes 

func SetShardServedTypes(cells []string, servedType topodatapb.TabletType) *ActionNode

SetShardServedTypes returns an ActionNode

func ShardExternallyReparented 

func ShardExternallyReparented(tabletAlias *topodatapb.TabletAlias) *ActionNode

ShardExternallyReparented returns an ActionNode

func UpdateShard 

func UpdateShard() *ActionNode

UpdateShard returns an ActionNode

func (*ActionNode) LockKeyspace 

func (n *ActionNode) LockKeyspace(ctx context.Context, ts topo.Server, keyspace string) (lockPath string, err error)

LockKeyspace will lock the keyspace in the topology server. UnlockKeyspace should be called if this returns no error.

func (*ActionNode) LockShard 

func (n *ActionNode) LockShard(ctx context.Context, ts topo.Server, keyspace, shard string) (lockPath string, err error)

LockShard will lock the shard in the topology server. UnlockShard should be called if this returns no error.

func (*ActionNode) LockSrvShard 

func (n *ActionNode) LockSrvShard(ctx context.Context, ts topo.Server, cell, keyspace, shard string) (lockPath string, err error)

LockSrvShard will lock the serving shard in the topology server. UnlockSrvShard should be called if this returns no error.

func (*ActionNode) SetGuid 

func (n *ActionNode) SetGuid() *ActionNode

SetGuid will set the ActionGuid field for the action node and return the action node.

func (*ActionNode) ToJSON 

func (n *ActionNode) ToJSON() (string, error)

ToJSON returns a JSON representation of the object.

func (*ActionNode) UnlockKeyspace 

func (n *ActionNode) UnlockKeyspace(ctx context.Context, ts topo.Server, keyspace string, lockPath string, actionError error) error

UnlockKeyspace unlocks a previously locked keyspace.

func (*ActionNode) UnlockShard 

func (n *ActionNode) UnlockShard(ctx context.Context, ts topo.Server, keyspace, shard string, lockPath string, actionError error) error

UnlockShard unlocks a previously locked shard.

func (*ActionNode) UnlockSrvShard 

func (n *ActionNode) UnlockSrvShard(ctx context.Context, ts topo.Server, cell, keyspace, shard string, lockPath string, actionError error) error

UnlockSrvShard unlocks a previously locked serving shard.

type ActionState 

type ActionState string

ActionState is the state an ActionNode

type ApplySchemaKeyspaceArgs 

type ApplySchemaKeyspaceArgs struct {
	Change string
}

ApplySchemaKeyspaceArgs is the payload for ApplySchemaKeyspace

type MigrateServedFromArgs 

type MigrateServedFromArgs struct {
	ServedType topodatapb.TabletType
}

MigrateServedFromArgs is the payload for MigrateServedFrom

type MigrateServedTypesArgs 

type MigrateServedTypesArgs struct {
	ServedType topodatapb.TabletType
}

MigrateServedTypesArgs is the payload for MigrateServedTypes

type ReparentShardArgs 

type ReparentShardArgs struct {
	Operation        string
	MasterElectAlias *topodatapb.TabletAlias
}

ReparentShardArgs is the payload for ReparentShard

type SetShardServedTypesArgs 

type SetShardServedTypesArgs struct {
	Cells      []string
	ServedType topodatapb.TabletType
}

SetShardServedTypesArgs is the payload for SetShardServedTypes

type SlaveWasRestartedArgs 

type SlaveWasRestartedArgs struct {
	Parent *topodatapb.TabletAlias
}

SlaveWasRestartedArgs is the paylod for SlaveWasRestarted

Source Files

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