50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
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/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package process
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import (
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"os"
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"os/signal"
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"syscall"
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"time"
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klog "k8s.io/klog/v2"
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)
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type exiter func(code int)
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// HandleSigterm receives a ProcessController interface and deals with
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// the graceful shutdown
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func HandleSigterm(ngx ProcessController, delay int, exit exiter) {
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signalChan := make(chan os.Signal, 1)
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signal.Notify(signalChan, syscall.SIGTERM)
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<-signalChan
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klog.InfoS("Received SIGTERM, shutting down")
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exitCode := 0
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if err := ngx.Stop(); err != nil {
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klog.Warningf("Error during shutdown: %v", err)
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exitCode = 1
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}
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klog.Infof("Handled quit, delaying controller exit for %d seconds", delay)
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time.Sleep(time.Duration(delay) * time.Second)
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klog.InfoS("Exiting", "code", exitCode)
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exit(exitCode)
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}
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