mirror of
https://github.com/fluxcd/flagger.git
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65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
/*
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Copyright 2020 The Flux 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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"net/http"
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"time"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"go.uber.org/zap"
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)
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// ListenAndServe starts a web server and waits for SIGTERM
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func ListenAndServe(port string, timeout time.Duration, logger *zap.SugaredLogger, stopCh <-chan struct{}) {
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mux := http.DefaultServeMux
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mux.Handle("/metrics", promhttp.Handler())
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mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("OK"))
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})
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srv := &http.Server{
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Addr: ":" + port,
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Handler: mux,
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ReadTimeout: 5 * time.Second,
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WriteTimeout: 1 * time.Minute,
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IdleTimeout: 15 * time.Second,
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}
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logger.Infof("Starting HTTP server on port %s", port)
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// run server in background
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go func() {
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if err := srv.ListenAndServe(); err != http.ErrServerClosed {
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logger.Fatalf("HTTP server crashed %v", err)
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}
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}()
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// wait for SIGTERM or SIGINT
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<-stopCh
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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if err := srv.Shutdown(ctx); err != nil {
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logger.Errorf("HTTP server graceful shutdown failed %v", err)
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} else {
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logger.Info("HTTP server stopped")
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}
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}
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