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minio/cmd/signals.go

93 lines
2.3 KiB

/*
* Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 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"
)
func handleSignals() {
// Custom exit function
exit := func(state bool) {
// If global profiler is set stop before we exit.
if globalProfiler != nil {
globalProfiler.Stop()
}
if state {
os.Exit(0)
}
os.Exit(1)
}
stopProcess := func() bool {
var err, oerr error
if globalNotificationSys != nil {
globalNotificationSys.RemoveAllRemoteTargets()
}
err = globalHTTPServer.Shutdown()
errorIf(err, "Unable to shutdown http server")
if objAPI := newObjectLayerFn(); objAPI != nil {
oerr = objAPI.Shutdown(context.Background())
errorIf(oerr, "Unable to shutdown object layer")
}
return (err == nil && oerr == nil)
}
for {
select {
case err := <-globalHTTPServerErrorCh:
errorIf(err, "http server exited abnormally")
var oerr error
if objAPI := newObjectLayerFn(); objAPI != nil {
oerr = objAPI.Shutdown(context.Background())
errorIf(oerr, "Unable to shutdown object layer")
}
exit(err == nil && oerr == nil)
case osSignal := <-globalOSSignalCh:
stopHTTPTrace()
log.Printf("Exiting on signal %v\n", osSignal)
exit(stopProcess())
case signal := <-globalServiceSignalCh:
switch signal {
case serviceStatus:
// Ignore this at the moment.
case serviceRestart:
log.Println("Restarting on service signal")
err := globalHTTPServer.Shutdown()
errorIf(err, "Unable to shutdown http server")
stopHTTPTrace()
rerr := restartProcess()
errorIf(rerr, "Unable to restart the server")
exit(err == nil && rerr == nil)
case serviceStop:
log.Println("Stopping on service signal")
stopHTTPTrace()
exit(stopProcess())
}
}
}
}