minio/cmd/signals.go
Harshavardhana d65a2c6725
Implement cluster-wide in-place updates (#8070)
This PR is a breaking change and also deprecates
`minio update` command, from this release onwards
all users are advised to just use `mc admin update`
2019-08-27 11:37:47 -07:00

94 lines
2.3 KiB
Go

/*
* MinIO Cloud Storage, (C) 2015-2019 MinIO, Inc.
*
* 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 cmd
import (
"context"
"os"
"strings"
"github.com/minio/minio/cmd/logger"
)
func handleSignals() {
// Custom exit function
exit := func(success bool) {
// If global profiler is set stop before we exit.
if globalProfiler != nil {
globalProfiler.Stop()
}
if success {
os.Exit(0)
}
os.Exit(1)
}
stopProcess := func() bool {
var err, oerr error
if globalNotificationSys != nil {
globalNotificationSys.RemoveAllRemoteTargets()
}
// Stop watching for any certificate changes.
globalTLSCerts.Stop()
err = globalHTTPServer.Shutdown()
logger.LogIf(context.Background(), err)
// send signal to various go-routines that they need to quit.
close(GlobalServiceDoneCh)
if objAPI := newObjectLayerFn(); objAPI != nil {
oerr = objAPI.Shutdown(context.Background())
logger.LogIf(context.Background(), oerr)
}
return (err == nil && oerr == nil)
}
for {
select {
case err := <-globalHTTPServerErrorCh:
if objAPI := newObjectLayerFn(); objAPI != nil {
objAPI.Shutdown(context.Background())
}
if err != nil {
logger.Fatal(err, "Unable to start MinIO server")
}
exit(true)
case osSignal := <-globalOSSignalCh:
logger.Info("Exiting on signal: %s", strings.ToUpper(osSignal.String()))
exit(stopProcess())
case signal := <-globalServiceSignalCh:
switch {
case signal&serviceRestart == serviceRestart:
logger.Info("Restarting on service signal")
stop := stopProcess()
rerr := restartProcess()
logger.LogIf(context.Background(), rerr)
exit(stop && rerr == nil)
case signal&serviceStop == serviceStop:
logger.Info("Stopping on service signal")
exit(stopProcess())
}
}
}
}