64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
/*
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Copyright 2018 The Jetstack cert-manager contributors.
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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 main
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import (
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"flag"
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"os"
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"os/signal"
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"syscall"
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"github.com/golang/glog"
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"github.com/jetstack/cert-manager/pkg/logs"
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)
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func main() {
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logs.InitLogs()
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defer logs.FlushLogs()
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stopCh := SetupSignalHandler()
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cmd := NewCommandStartCertManagerController(os.Stdout, os.Stderr, stopCh)
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cmd.Flags().AddGoFlagSet(flag.CommandLine)
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flag.CommandLine.Parse([]string{})
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if err := cmd.Execute(); err != nil {
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glog.Fatal(err)
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}
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}
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var shutdownSignals = []os.Signal{os.Interrupt, syscall.SIGTERM}
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var onlyOneSignalHandler = make(chan struct{})
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// SetupSignalHandler registered for SIGTERM and SIGINT. A stop channel is returned
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// which is closed on one of these signals. If a second signal is caught, the program
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// is terminated with exit code 1.
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func SetupSignalHandler() (stopCh <-chan struct{}) {
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close(onlyOneSignalHandler) // panics when called twice
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stop := make(chan struct{})
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c := make(chan os.Signal, 2)
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signal.Notify(c, shutdownSignals...)
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go func() {
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<-c
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close(stop)
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<-c
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os.Exit(1) // second signal. Exit directly.
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}()
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return stop
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}
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