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main.go
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main.go
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/*
© Copyright IBM Corporation 2017, 2021
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:https://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.
*/
// runmqserver initializes, creates and starts a queue manager, as PID 1 in a container
package main
import (
"context"
"errors"
"flag"
"os"
"sync"
"github.com/ibm-messaging/mq-container/internal/ha"
"github.com/ibm-messaging/mq-container/internal/metrics"
"github.com/ibm-messaging/mq-container/internal/ready"
"github.com/ibm-messaging/mq-container/internal/tls"
"github.com/ibm-messaging/mq-container/pkg/containerruntimelogger"
"github.com/ibm-messaging/mq-container/pkg/name"
)
func doMain() error {
var initFlag = flag.Bool("i", false, "initialize volume only, then exit")
var infoFlag = flag.Bool("info", false, "Display debug info, then exit")
var noLogRuntimeFlag = flag.Bool("nologruntime", false, "used when running this program from another program, to control log output")
var devFlag = flag.Bool("dev", false, "used when running this program from runmqdevserver to control how TLS is configured")
flag.Parse()
name, nameErr := name.GetQueueManagerName()
mf, err := configureLogger(name)
if err != nil {
logTermination(err)
return err
}
// Check whether they only want debug info
if *infoFlag {
logVersionInfo()
err = containerruntimelogger.LogContainerDetails(log)
if err != nil {
log.Printf("Error displaying container details: %v", err)
}
return nil
}
err = verifySingleProcess()
if err != nil {
// We don't do the normal termination here as it would create a termination file.
log.Error(err)
return err
}
if nameErr != nil {
logTermination(err)
return err
}
err = ready.Clear()
if err != nil {
logTermination(err)
return err
}
accepted, err := checkLicense()
if err != nil {
logTerminationf("Error checking license acceptance: %v", err)
return err
}
if !accepted {
err = errors.New("License not accepted")
logTermination(err)
return err
}
log.Printf("Using queue manager name: %v", name)
// Start signal handler
signalControl := signalHandler(name)
// Enable diagnostic collecting on failure
collectDiagOnFail = true
if *noLogRuntimeFlag == false {
err = containerruntimelogger.LogContainerDetails(log)
if err != nil {
logTermination(err)
return err
}
}
err = createVolume("/mnt/mqm/data")
if err != nil {
logTermination(err)
return err
}
err = createVolume("/mnt/mqm-log/log")
if err != nil {
logTermination(err)
return err
}
err = createVolume("/mnt/mqm-data/qmgrs")
if err != nil {
logTermination(err)
return err
}
enableTraceCrtmqdir := os.Getenv("MQ_ENABLE_TRACE_CRTMQDIR")
if enableTraceCrtmqdir == "true" || enableTraceCrtmqdir == "1" {
err = startMQTrace()
if err != nil {
logTermination(err)
return err
}
}
err = createDirStructure()
if err != nil {
logTermination(err)
return err
}
if enableTraceCrtmqdir == "true" || enableTraceCrtmqdir == "1" {
err = endMQTrace()
if err != nil {
logTermination(err)
return err
}
}
// If init flag is set, exit now
if *initFlag {
return nil
}
// Print out versioning information
logVersionInfo()
keyLabel, defaultCmsKeystore, defaultP12Truststore, err := tls.ConfigureDefaultTLSKeystores()
if err != nil {
logTermination(err)
return err
}
err = tls.ConfigureTLS(keyLabel, defaultCmsKeystore, *devFlag, log)
if err != nil {
logTermination(err)
return err
}
err = postInit(name, keyLabel, defaultP12Truststore)
if err != nil {
logTermination(err)
return err
}
if os.Getenv("MQ_NATIVE_HA") == "true" {
err = ha.ConfigureNativeHA(log)
if err != nil {
logTermination(err)
return err
}
}
enableTraceCrtmqm := os.Getenv("MQ_ENABLE_TRACE_CRTMQM")
if enableTraceCrtmqm == "true" || enableTraceCrtmqm == "1" {
err = startMQTrace()
if err != nil {
logTermination(err)
return err
}
}
newQM, err := createQueueManager(name, *devFlag)
if err != nil {
logTermination(err)
return err
}
if enableTraceCrtmqm == "true" || enableTraceCrtmqm == "1" {
err = endMQTrace()
if err != nil {
logTermination(err)
return err
}
}
var wg sync.WaitGroup
defer func() {
log.Debug("Waiting for log mirroring to complete")
wg.Wait()
}()
ctx, cancelMirror := context.WithCancel(context.Background())
defer func() {
log.Debug("Cancel log mirroring")
cancelMirror()
}()
// TODO: Use the error channel
_, err = mirrorSystemErrorLogs(ctx, &wg, mf)
if err != nil {
logTermination(err)
return err
}
_, err = mirrorQueueManagerErrorLogs(ctx, &wg, name, newQM, mf)
if err != nil {
logTermination(err)
return err
}
if *devFlag {
_, err = mirrorHTPasswdLogs(ctx, &wg, name, newQM, mf)
if err != nil {
logTermination(err)
return err
}
}
// Recommended to use this option in conjunction with setting WLP_LOGGING_MESSAGE_FORMAT=JSON
mirrorWebLog := os.Getenv("MQ_ENABLE_EMBEDDED_WEB_SERVER_LOG")
if mirrorWebLog == "true" || mirrorWebLog == "1" {
_, err = mirrorWebServerLogs(ctx, &wg, name, newQM, mf)
if err != nil {
logTermination(err)
return err
}
}
err = updateCommandLevel()
if err != nil {
logTermination(err)
return err
}
enableTraceStrmqm := os.Getenv("MQ_ENABLE_TRACE_STRMQM")
if enableTraceStrmqm == "true" || enableTraceStrmqm == "1" {
err = startMQTrace()
if err != nil {
logTermination(err)
return err
}
}
// This is a developer image only change
// This workaround should be removed and handled via <crtmqm -ii>, when inimerge is ready to handle stanza ordering
if *devFlag {
err = updateQMini(name)
if err != nil {
logTermination(err)
return err
}
}
err = startQueueManager(name)
if err != nil {
logTermination(err)
return err
}
if enableTraceStrmqm == "true" || enableTraceStrmqm == "1" {
err = endMQTrace()
if err != nil {
logTermination(err)
return err
}
}
enableMetrics := os.Getenv("MQ_ENABLE_METRICS")
if enableMetrics == "true" || enableMetrics == "1" {
go metrics.GatherMetrics(name, log)
} else {
log.Println("Metrics are disabled")
}
// Start reaping zombies from now on.
// Start this here, so that we don't reap any sub-processes created
// by this process (e.g. for crtmqm or strmqm)
signalControl <- startReaping
// Reap zombies now, just in case we've already got some
signalControl <- reapNow
// Write a file to indicate that chkmqready should now work as normal
err = ready.Set()
if err != nil {
logTermination(err)
return err
}
// Wait for terminate signal
<-signalControl
return nil
}
var osExit = os.Exit
func main() {
err := doMain()
if err != nil {
osExit(1)
}
}