logic

package
v0.15.1 Latest Latest
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 Go to latest Published: Nov 29, 2022 License: Apache-2.0 Imports: 40 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	PrimaryRecovery             RecoveryType = "PrimaryRecovery"
	CoPrimaryRecovery           RecoveryType = "CoPrimaryRecovery"
	IntermediatePrimaryRecovery RecoveryType = "IntermediatePrimaryRecovery"

	CheckAndRecoverGenericProblemRecoveryName        string = "CheckAndRecoverGenericProblem"
	RecoverDeadPrimaryRecoveryName                   string = "RecoverDeadPrimary"
	RecoverPrimaryHasPrimaryRecoveryName             string = "RecoverPrimaryHasPrimary"
	CheckAndRecoverLockedSemiSyncPrimaryRecoveryName string = "CheckAndRecoverLockedSemiSyncPrimary"
	ElectNewPrimaryRecoveryName                      string = "ElectNewPrimary"
	FixPrimaryRecoveryName                           string = "FixPrimary"
	FixReplicaRecoveryName                           string = "FixReplica"
)
View Source 
const TopologyRecoveriesTemplate = `` /* 497-byte string literal not displayed */

TopologyRecoveriesTemplate is the HTML to use to display the topology recovery steps list object

Variables

View Source 
var (

	// ErrNoPrimaryTablet is a fixed error message.
	ErrNoPrimaryTablet = errors.New("no primary tablet found")
)

Functions

func AcknowledgeCrashedRecoveries 

func AcknowledgeCrashedRecoveries() (countAcknowledgedEntries int64, err error)

AcknowledgeCrashedRecoveries marks recoveries whose processing nodes has crashed as acknowledged.

func AcknowledgeInstanceCompletedRecoveries 

func AcknowledgeInstanceCompletedRecoveries(instanceKey *inst.InstanceKey, owner string, comment string) (countAcknowledgedEntries int64, err error)

AcknowledgeInstanceCompletedRecoveries marks active and COMPLETED recoveries for given instane as acknowledged. This also implied clearing their active period, which in turn enables further recoveries on those topologies

func AttemptFailureDetectionRegistration 

func AttemptFailureDetectionRegistration(analysisEntry *inst.ReplicationAnalysis) (registrationSuccessful bool, err error)

AttemptFailureDetectionRegistration tries to add a failure-detection entry; if this fails that means the problem has already been detected

func AuditTopologyRecovery 

func AuditTopologyRecovery(topologyRecovery *TopologyRecovery, message string) error

AuditTopologyRecovery audits a single step in a topology recovery process.

func CheckAndRecover 

func CheckAndRecover(specificInstance *inst.InstanceKey, candidateInstanceKey *inst.InstanceKey, skipProcesses bool) (recoveryAttempted bool, promotedReplicaKey *inst.InstanceKey, err error)

CheckAndRecover is the main entry point for the recovery mechanism

func ClearActiveFailureDetections 

func ClearActiveFailureDetections() error

ClearActiveFailureDetections clears the "in_active_period" flag for old-enough detections, thereby allowing for further detections on cleared instances.

func ClearActiveRecoveries 

func ClearActiveRecoveries() error

ClearActiveRecoveries clears the "in_active_period" flag for old-enough recoveries, thereby allowing for further recoveries on cleared instances.

func ContinuousDiscovery 

func ContinuousDiscovery()

ContinuousDiscovery starts an asynchronuous infinite discovery process where instances are periodically investigated and their status captured, and long since unseen instances are purged and forgotten. nolint SA1015: using time.Tick leaks the underlying ticker

func DisableRecovery 

func DisableRecovery() error

DisableRecovery ensures recoveries are disabled globally

func DiscoverInstance 

func DiscoverInstance(instanceKey inst.InstanceKey, forceDiscovery bool)

DiscoverInstance will attempt to discover (poll) an instance (unless it is already up to date) and will also ensure that its primary and replicas (if any) are also checked.

func EnableRecovery 

func EnableRecovery() error

EnableRecovery ensures recoveries are enabled globally

func ExpireBlockedRecoveries 

func ExpireBlockedRecoveries() error

ExpireBlockedRecoveries clears listing of blocked recoveries that are no longer actually blocked.

func ExpireFailureDetectionHistory 

func ExpireFailureDetectionHistory() error

ExpireFailureDetectionHistory removes old rows from the topology_failure_detection table

func ExpireTopologyRecoveryHistory 

func ExpireTopologyRecoveryHistory() error

ExpireTopologyRecoveryHistory removes old rows from the topology_failure_detection table

func ExpireTopologyRecoveryStepsHistory 

func ExpireTopologyRecoveryStepsHistory() error

ExpireTopologyRecoveryStepsHistory removes old rows from the topology_failure_detection table

func IsLeader 

func IsLeader() bool

func IsLeaderOrActive 

func IsLeaderOrActive() bool

func IsRecoveryDisabled 

func IsRecoveryDisabled() (disabled bool, err error)

IsRecoveryDisabled returns true if Recoveries are disabled globally

func LockShard 

func LockShard(ctx context.Context, instanceKey inst.InstanceKey) (context.Context, func(*error), error)

LockShard locks the keyspace-shard preventing others from performing conflicting actions.

func OpenTabletDiscovery 

func OpenTabletDiscovery() <-chan time.Time

OpenTabletDiscovery opens the vitess topo if enables and returns a ticker channel for polling.

func RefreshAllKeyspaces 

func RefreshAllKeyspaces()

RefreshAllKeyspaces reloads the keyspace information for the keyspaces that vtorc is concerned with.

func RefreshKeyspace 

func RefreshKeyspace(keyspaceName string) error

RefreshKeyspace refreshes the keyspace's information for the given keyspace from the topo

func RegisterBlockedRecoveries 

func RegisterBlockedRecoveries(analysisEntry *inst.ReplicationAnalysis, blockingRecoveries []*TopologyRecovery) error

RegisterBlockedRecoveries writes down currently blocked recoveries, and indicates what recovery they are blocked on. Recoveries are blocked thru the in_active_period flag, which comes to avoid flapping.

func RegisterFlags 

func RegisterFlags(fs *pflag.FlagSet)

RegisterFlags registers the flags required by VTOrc

Types

type BlockedTopologyRecovery 

type BlockedTopologyRecovery struct {
	FailedInstanceKey    inst.InstanceKey
	ClusterName          string
	Analysis             inst.AnalysisCode
	LastBlockedTimestamp string
	BlockingRecoveryID   int64
}

BlockedTopologyRecovery represents an entry in the blocked_topology_recovery table

type PrimaryRecoveryType 

type PrimaryRecoveryType string
const (
	NotPrimaryRecovery          PrimaryRecoveryType = "NotPrimaryRecovery"
	PrimaryRecoveryGTID         PrimaryRecoveryType = "PrimaryRecoveryGTID"
	PrimaryRecoveryBinlogServer PrimaryRecoveryType = "PrimaryRecoveryBinlogServer"
	PrimaryRecoveryUnknown      PrimaryRecoveryType = "PrimaryRecoveryUnknown"
)

type RecoveryAcknowledgement 

type RecoveryAcknowledgement struct {
	CreatedAt time.Time
	Owner     string
	Comment   string

	Key           inst.InstanceKey
	ClusterName   string
	ID            int64
	UID           string
	AllRecoveries bool
}

type RecoveryType 

type RecoveryType string

type TopologyRecovery 

type TopologyRecovery struct {
	inst.PostponedFunctionsContainer

	ID                        int64
	UID                       string
	AnalysisEntry             inst.ReplicationAnalysis
	SuccessorKey              *inst.InstanceKey
	SuccessorAlias            string
	IsActive                  bool
	IsSuccessful              bool
	LostReplicas              inst.InstanceKeyMap
	ParticipatingInstanceKeys inst.InstanceKeyMap
	AllErrors                 []string
	RecoveryStartTimestamp    string
	RecoveryEndTimestamp      string
	ProcessingNodeHostname    string
	ProcessingNodeToken       string
	Acknowledged              bool
	AcknowledgedAt            string
	AcknowledgedBy            string
	AcknowledgedComment       string
	LastDetectionID           int64
	RelatedRecoveryID         int64
	Type                      RecoveryType
	RecoveryType              PrimaryRecoveryType
}

TopologyRecovery represents an entry in the topology_recovery table

func AttemptRecoveryRegistration 

func AttemptRecoveryRegistration(analysisEntry *inst.ReplicationAnalysis, failIfFailedInstanceInActiveRecovery bool, failIfClusterInActiveRecovery bool) (*TopologyRecovery, error)

AttemptRecoveryRegistration tries to add a recovery entry; if this fails that means recovery is already in place.

func NewTopologyRecovery 

func NewTopologyRecovery(replicationAnalysis inst.ReplicationAnalysis) *TopologyRecovery

func ReadInActivePeriodClusterRecovery 

func ReadInActivePeriodClusterRecovery(clusterName string) ([]*TopologyRecovery, error)

ReadInActivePeriodClusterRecovery reads recoveries (possibly complete!) that are in active period. (may be used to block further recoveries on this cluster)

func ReadInActivePeriodSuccessorInstanceRecovery 

func ReadInActivePeriodSuccessorInstanceRecovery(instanceKey *inst.InstanceKey) ([]*TopologyRecovery, error)

ReadInActivePeriodSuccessorInstanceRecovery reads completed recoveries for a given instance, where said instance was promoted as result, still in active period (may be used to block further recoveries should this instance die)

func ReadRecentRecoveries 

func ReadRecentRecoveries(clusterName string, unacknowledgedOnly bool, page int) ([]*TopologyRecovery, error)

ReadRecentRecoveries reads latest recovery entries from topology_recovery

func (*TopologyRecovery) AddError 

func (topologyRecovery *TopologyRecovery) AddError(err error) error

func (*TopologyRecovery) AddErrors 

func (topologyRecovery *TopologyRecovery) AddErrors(errs []error)

type TopologyRecoveryStep 

type TopologyRecoveryStep struct {
	ID          int64
	RecoveryUID string
	AuditAt     string
	Message     string
}

func NewTopologyRecoveryStep 

func NewTopologyRecoveryStep(uid string, message string) *TopologyRecoveryStep

Source Files

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