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process.go
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process.go
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/*
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.
*/
package base
import (
"fmt"
"gitee.com/opengauss/ham4db/go/core/log"
"gitee.com/opengauss/ham4db/go/core/system/osp"
"gitee.com/opengauss/ham4db/go/dtstruct"
goos "os"
"strings"
"time"
)
// executeProcesses executes a list of processes
func ExecuteProcesses(processes []string, description string, topologyRecovery *dtstruct.TopologyRecovery, failOnError bool) (err error) {
if len(processes) == 0 {
AuditTopologyRecovery(topologyRecovery, fmt.Sprintf("No %s hooks to run", description))
return nil
}
AuditTopologyRecovery(topologyRecovery, fmt.Sprintf("Running %d %s hooks", len(processes), description))
for i, command := range processes {
command, async := prepareCommand(command, topologyRecovery)
env := applyEnvironmentVariables(topologyRecovery)
//todo:异步执行
async = true
fullDescription := fmt.Sprintf("%s hook %d of %d", description, i+1, len(processes))
if async {
fullDescription = fmt.Sprintf("%s (async)", fullDescription)
}
if async {
// Ignore errors
go ExecuteProcess(command, env, topologyRecovery, fullDescription)
} else {
//todo:此处有报错,先异步处理了
if cmdErr := ExecuteProcess(command, env, topologyRecovery, fullDescription); cmdErr != nil {
if failOnError {
AuditTopologyRecovery(topologyRecovery, fmt.Sprintf("Not running further %s hooks", description))
return cmdErr
}
if err == nil {
// Keep first error encountered
err = cmdErr
}
}
}
}
AuditTopologyRecovery(topologyRecovery, fmt.Sprintf("done running %s hooks", description))
return err
}
// applyEnvironmentVariables sets the relevant environment variables for a recovery
func applyEnvironmentVariables(topologyRecovery *dtstruct.TopologyRecovery) []string {
analysisEntry := &topologyRecovery.AnalysisEntry
env := goos.Environ()
env = append(env, fmt.Sprintf("ORC_FAILURE_TYPE=%s", string(analysisEntry.Analysis)))
env = append(env, fmt.Sprintf("ORC_INSTANCE_TYPE=%s", string(analysisEntry.GetAnalysisInstanceType())))
env = append(env, fmt.Sprintf("ORC_IS_MASTER=%t", analysisEntry.IsMaster))
env = append(env, fmt.Sprintf("ORC_IS_CO_MASTER=%t", analysisEntry.IsCoMaster))
env = append(env, fmt.Sprintf("ORC_FAILURE_DESCRIPTION=%s", analysisEntry.Description))
env = append(env, fmt.Sprintf("ORC_COMMAND=%s", analysisEntry.CommandHint))
env = append(env, fmt.Sprintf("ORC_FAILED_HOST=%s", analysisEntry.AnalyzedInstanceKey.Hostname))
env = append(env, fmt.Sprintf("ORC_FAILED_PORT=%d", analysisEntry.AnalyzedInstanceKey.Port))
env = append(env, fmt.Sprintf("ORC_FAILURE_CLUSTER=%s", analysisEntry.ClusterDetails.ClusterName))
env = append(env, fmt.Sprintf("ORC_FAILURE_CLUSTER_ALIAS=%s", analysisEntry.ClusterDetails.ClusterAlias))
env = append(env, fmt.Sprintf("ORC_FAILURE_CLUSTER_DOMAIN=%s", analysisEntry.ClusterDetails.ClusterDomain))
env = append(env, fmt.Sprintf("ORC_COUNT_REPLICAS=%d", analysisEntry.CountReplicas))
env = append(env, fmt.Sprintf("ORC_IS_DOWNTIMED=%v", analysisEntry.IsDowntimed))
env = append(env, fmt.Sprintf("ORC_AUTO_MASTER_RECOVERY=%v", analysisEntry.ClusterDetails.HasAutomatedMasterRecovery))
env = append(env, fmt.Sprintf("ORC_AUTO_INTERMEDIATE_MASTER_RECOVERY=%v", analysisEntry.ClusterDetails.HasAutomatedIntermediateMasterRecovery))
env = append(env, fmt.Sprintf("ORC_HAM4DB_HOST=%s", osp.GetHostname()))
env = append(env, fmt.Sprintf("ORC_IS_SUCCESSFUL=%v", (topologyRecovery.SuccessorKey != nil)))
env = append(env, fmt.Sprintf("ORC_LOST_REPLICAS=%s", topologyRecovery.LostReplicas.ToCommaDelimitedList()))
env = append(env, fmt.Sprintf("ORC_REPLICA_HOSTS=%s", analysisEntry.Downstreams.ToCommaDelimitedList()))
env = append(env, fmt.Sprintf("ORC_RECOVERY_UID=%s", topologyRecovery.UID))
if topologyRecovery.SuccessorKey != nil {
env = append(env, fmt.Sprintf("ORC_SUCCESSOR_HOST=%s", topologyRecovery.SuccessorKey.Hostname))
env = append(env, fmt.Sprintf("ORC_SUCCESSOR_PORT=%d", topologyRecovery.SuccessorKey.Port))
// As long as SucesssorKey != nil, we replace {successorAlias}.
// If SucessorAlias is "", it's fine. We'll replace {successorAlias} with "".
env = append(env, fmt.Sprintf("ORC_SUCCESSOR_ALIAS=%s", topologyRecovery.SuccessorAlias))
}
return env
}
// prepareCommand replaces agreed-upon placeholders with analysis data
func prepareCommand(command string, topologyRecovery *dtstruct.TopologyRecovery) (result string, async bool) {
analysisEntry := &topologyRecovery.AnalysisEntry
command = strings.TrimSpace(command)
if strings.HasSuffix(command, "&") {
command = strings.TrimRight(command, "&")
async = true
}
command = strings.Replace(command, "{failureType}", string(analysisEntry.Analysis), -1)
command = strings.Replace(command, "{instanceType}", string(analysisEntry.GetAnalysisInstanceType()), -1)
command = strings.Replace(command, "{isMaster}", fmt.Sprintf("%t", analysisEntry.IsMaster), -1)
command = strings.Replace(command, "{isCoMaster}", fmt.Sprintf("%t", analysisEntry.IsCoMaster), -1)
command = strings.Replace(command, "{failureDescription}", analysisEntry.Description, -1)
command = strings.Replace(command, "{command}", analysisEntry.CommandHint, -1)
command = strings.Replace(command, "{failedHost}", analysisEntry.AnalyzedInstanceKey.Hostname, -1)
command = strings.Replace(command, "{failedPort}", fmt.Sprintf("%d", analysisEntry.AnalyzedInstanceKey.Port), -1)
command = strings.Replace(command, "{failureCluster}", analysisEntry.ClusterDetails.ClusterName, -1)
command = strings.Replace(command, "{failureClusterAlias}", analysisEntry.ClusterDetails.ClusterAlias, -1)
command = strings.Replace(command, "{failureClusterDomain}", analysisEntry.ClusterDetails.ClusterDomain, -1)
command = strings.Replace(command, "{countSlaves}", fmt.Sprintf("%d", analysisEntry.CountReplicas), -1)
command = strings.Replace(command, "{countReplicas}", fmt.Sprintf("%d", analysisEntry.CountReplicas), -1)
command = strings.Replace(command, "{isDowntimed}", fmt.Sprint(analysisEntry.IsDowntimed), -1)
command = strings.Replace(command, "{autoMasterRecovery}", fmt.Sprint(analysisEntry.ClusterDetails.HasAutomatedMasterRecovery), -1)
command = strings.Replace(command, "{autoIntermediateMasterRecovery}", fmt.Sprint(analysisEntry.ClusterDetails.HasAutomatedIntermediateMasterRecovery), -1)
command = strings.Replace(command, "{ham4dbHost}", osp.GetHostname(), -1)
command = strings.Replace(command, "{recoveryUID}", topologyRecovery.UID, -1)
command = strings.Replace(command, "{isSuccessful}", fmt.Sprint(topologyRecovery.SuccessorKey != nil), -1)
if topologyRecovery.SuccessorKey != nil {
command = strings.Replace(command, "{successorHost}", topologyRecovery.SuccessorKey.Hostname, -1)
command = strings.Replace(command, "{successorPort}", fmt.Sprintf("%d", topologyRecovery.SuccessorKey.Port), -1)
// As long as SucesssorKey != nil, we replace {successorAlias}.
// If SucessorAlias is "", it's fine. We'll replace {successorAlias} with "".
command = strings.Replace(command, "{successorAlias}", topologyRecovery.SuccessorAlias, -1)
}
command = strings.Replace(command, "{lostSlaves}", topologyRecovery.LostReplicas.ToCommaDelimitedList(), -1)
command = strings.Replace(command, "{lostReplicas}", topologyRecovery.LostReplicas.ToCommaDelimitedList(), -1)
command = strings.Replace(command, "{countLostReplicas}", fmt.Sprintf("%d", len(topologyRecovery.LostReplicas)), -1)
command = strings.Replace(command, "{slaveHosts}", analysisEntry.Downstreams.ToCommaDelimitedList(), -1)
command = strings.Replace(command, "{replicaHosts}", analysisEntry.Downstreams.ToCommaDelimitedList(), -1)
return command, async
}
func ExecuteProcess(command string, env []string, topologyRecovery *dtstruct.TopologyRecovery, fullDescription string) (err error) {
// Log the command to be run and record how long it takes as this may be useful
AuditTopologyRecovery(topologyRecovery, fmt.Sprintf("Running %s: %s", fullDescription, command))
start := time.Now()
var info string
if err = osp.CommandRun(command, env); err == nil {
info = fmt.Sprintf("Completed %s in %v", fullDescription, time.Since(start))
} else {
info = fmt.Sprintf("Execution of %s failed in %v with error: %v", fullDescription, time.Since(start), err)
log.Errorf(info)
}
AuditTopologyRecovery(topologyRecovery, info)
return err
}