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 Go to latest Published: Nov 15, 2021 License: Apache-2.0 Imports: 28 Imported by: 0

Documentation

Overview

Copyright 2021 SANGFOR TECHNOLOGIES

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CheckAndRecoverGenericProblem 

func CheckAndRecoverGenericProblem(analysisEntry dtstruct.ReplicationAnalysis, candidateInstanceKey *dtstruct.InstanceKey, forceInstanceRecovery bool, skipProcesses bool) (bool, *dtstruct.TopologyRecovery, error)

func ForgetInstance 

func ForgetInstance(instanceKey *dtstruct.InstanceKey) error

ForgetInstance delete instance from table

func GetCandidateSiblingOfMaster 

func GetCandidateSiblingOfMaster(topologyRecovery *dtstruct.TopologyRecovery, intermediateMasterInstance *odtstruct.OpenGaussInstance) (*odtstruct.OpenGaussInstance, error)

GetCandidateSiblingOfMaster chooses the best sibling of a dead intermediate master to whom the IM's replicas can be moved.

func GetCheckAndRecoverFunction 

func GetCheckAndRecoverFunction(analysisCode dtstruct.AnalysisCode, analyzedInstanceKey *dtstruct.InstanceKey) (
	checkAndRecoverFunction func(analysisEntry dtstruct.ReplicationAnalysis, candidateInstanceKey *dtstruct.InstanceKey, forceInstanceRecovery bool, skipProcesses bool) (recoveryAttempted bool, topologyRecovery *dtstruct.TopologyRecovery, err error),
	isActionableRecovery bool,
)

GetCheckAndRecoverFunction get function for recover

func GetDownStreamInstance 

func GetDownStreamInstance(downstreamKeyList []dtstruct.InstanceKey) ([]*odtstruct.OpenGaussInstance, error)

GetDownStreamInstance get all downstream instances for upstream

func GetDuplicateInstance 

func GetDuplicateInstance(instanceKey *dtstruct.InstanceKey, clusterName string) ([]*odtstruct.OpenGaussInstance, error)

GetDuplicateInstance

func GetInfoFromInstance 

func GetInfoFromInstance(ctx context.Context, instanceKey *dtstruct.InstanceKey, checkOnly, bufferWrites bool, latency *stopwatch.NamedStopwatch, agentAddr string) (inst *odtstruct.OpenGaussInstance, err error)

GetInfoFromInstance create new instance according to instanceKey, get instance info by agent and write to backend database

func GetReplicationAnalysis 

func GetReplicationAnalysis(clusterName, clusterId string, hints *dtstruct.ReplicationAnalysisHints) ([]dtstruct.ReplicationAnalysis, error)

GetReplicationAnalysis will check for replication problems (dead upstream; unreachable upstream; etc) clusterId='x' means analysis all clusters

func GetSyncInfo 

func GetSyncInfo(instanceKey *dtstruct.InstanceKey) (interface{}, error)

GetSyncInfo get sync percent for instance

func GracefulMasterTakeover 

func GracefulMasterTakeover(clusterName string, designatedKey *dtstruct.InstanceKey, auto bool) (*dtstruct.TopologyRecovery, *dtstruct.LogCoordinates, error)

GracefulMasterTakeover will demote master of existing topology and promote its direct replica instead.

func NodeOperation 

func NodeOperation(ctx context.Context, instanceKey *dtstruct.InstanceKey, operationType aodtstruct.ActionType) (detail interface{}, err error)

NodeOperation connect to agent, and send action request to agent

func OpenTopology 

func OpenTopology(host string, port int, args ...interface{}) (db *sql.DB, err error)

OpenTopology get db client to remote opengauss instance

func ReadFromBackendDB 

func ReadFromBackendDB(instanceKey *dtstruct.InstanceKey) (*odtstruct.OpenGaussInstance, bool, error)

ReadFromBackendDB reads an instance from the backend database We know there will be at most one (hostname & port are PK) and we expect to find one

func ReadInstancesByCondition 

func ReadInstancesByCondition(query string, condition string, args []interface{}, sort string) ([]*odtstruct.OpenGaussInstance, error)

ReadInstancesByCondition is a generic function to read instances from the backend database

func RecoverDeadMaster 

func RecoverDeadMaster(topologyRecovery *dtstruct.TopologyRecovery, skipProcesses bool) (successorInstance *odtstruct.OpenGaussInstance, err error)

RecoverDeadIntermediateMaster performs intermediate master recovery; complete logic inside

func RecoverDeadMasterWithoutReplicas 

func RecoverDeadMasterWithoutReplicas(topologyRecovery *dtstruct.TopologyRecovery, skipProcesses bool) (successorInstance *odtstruct.OpenGaussInstance, err error)

func RecoverDeadReplica 

func RecoverDeadReplica(topologyRecovery *dtstruct.TopologyRecovery, skipProcesses bool) (successorInstance *odtstruct.OpenGaussInstance, err error)

func RecoverDownInstance 

func RecoverDownInstance(topologyRecovery *dtstruct.TopologyRecovery, skipProcesses bool) (successorInstance *odtstruct.OpenGaussInstance, err error)

func RecoverDuplicatePrimary 

func RecoverDuplicatePrimary(topologyRecovery *dtstruct.TopologyRecovery, skipProcesses bool) (successorInstance *odtstruct.OpenGaussInstance, err error)

func RelocateBelow 

func RelocateBelow(downstreamInstKey, upstreamInstKey *dtstruct.InstanceKey) (interface{}, error)

RelocateBelow change upstream and downstream role by switch over

func ReplicationConfirm 

func ReplicationConfirm(failedKey *dtstruct.InstanceKey, streamKey *dtstruct.InstanceKey, upstream bool) bool

ReplicationConfirm check if replication between instance and stream is normal

func RestartReplication 

func RestartReplication(ctx context.Context, instanceKey *dtstruct.InstanceKey) (interface{}, error)

RestartReplication restart replication

func RowToInstance 

func RowToInstance(m sqlutil.RowMap) *odtstruct.OpenGaussInstance

RowToInstance reads a single instance row from the backend database.

func StartReplica 

func StartReplica(ctx context.Context, instanceKey *dtstruct.InstanceKey) (interface{}, error)

StartReplica

func StopReplication 

func StopReplication(ctx context.Context, instanceKey *dtstruct.InstanceKey) (interface{}, error)

StopReplication stop replication

func Topology 

func Topology(request *dtstruct.Request, historyTimestampPattern string, tabulated bool, printTags bool) (result interface{}, err error)

Topology show opengauss topology

func UpdateInstanceCheck 

func UpdateInstanceCheck(upstream *dtstruct.InstanceKey, downstream *dtstruct.InstanceKey)

UpdateInstanceCheck insert or update downstream instance to backend database

func WriteToBackendDB 

func WriteToBackendDB(ctx context.Context, instances []dtstruct.InstanceAdaptor, instanceWasActuallyFound bool, updateLastSeen bool) error

WriteToBackendDB write all instance to backend database

Types

This section is empty.

Source Files

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