mirror of
https://github.com/ceph/ceph-csi.git
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07b05616a0
Bumps [k8s.io/kubernetes](https://github.com/kubernetes/kubernetes) from 1.26.2 to 1.27.2. - [Release notes](https://github.com/kubernetes/kubernetes/releases) - [Commits](https://github.com/kubernetes/kubernetes/compare/v1.26.2...v1.27.2) --- updated-dependencies: - dependency-name: k8s.io/kubernetes dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>
70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
/*
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Copyright 2017 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 server
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import (
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"context"
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"os"
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"os/signal"
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)
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var onlyOneSignalHandler = make(chan struct{})
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var shutdownHandler chan os.Signal
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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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// Only one of SetupSignalContext and SetupSignalHandler should be called, and only can
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// be called once.
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func SetupSignalHandler() <-chan struct{} {
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return SetupSignalContext().Done()
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}
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// SetupSignalContext is same as SetupSignalHandler, but a context.Context is returned.
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// Only one of SetupSignalContext and SetupSignalHandler should be called, and only can
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// be called once.
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func SetupSignalContext() context.Context {
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close(onlyOneSignalHandler) // panics when called twice
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shutdownHandler = make(chan os.Signal, 2)
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ctx, cancel := context.WithCancel(context.Background())
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signal.Notify(shutdownHandler, shutdownSignals...)
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go func() {
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<-shutdownHandler
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cancel()
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<-shutdownHandler
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os.Exit(1) // second signal. Exit directly.
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}()
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return ctx
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}
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// RequestShutdown emulates a received event that is considered as shutdown signal (SIGTERM/SIGINT)
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// This returns whether a handler was notified
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func RequestShutdown() bool {
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if shutdownHandler != nil {
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select {
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case shutdownHandler <- shutdownSignals[0]:
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return true
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default:
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}
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}
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return false
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}
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