// Copyright © 2018 Enrico Stahn // 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" "net/http" "os" "os/signal" "syscall" "time" "github.com/hipages/php-fpm_exporter/phpfpm" "github.com/prometheus/client_golang/prometheus" "github.com/prometheus/client_golang/prometheus/promhttp" "github.com/spf13/cobra" ) // Configuration variables var ( listeningAddress string metricsEndpoint string scrapeURIs []string fixProcessCount bool ) // serverCmd represents the server command var serverCmd = &cobra.Command{ Use: "server", Short: "A brief description of your command", Long: `A longer description that spans multiple lines and likely contains examples and usage of using your command. For example: Cobra is a CLI library for Go that empowers applications. This application is a tool to generate the needed files to quickly create a Cobra application.`, Run: func(cmd *cobra.Command, args []string) { log.Infof("Starting server on %v with path %v", listeningAddress, metricsEndpoint) pm := phpfpm.PoolManager{} for _, uri := range scrapeURIs { pm.Add(uri) } exporter := phpfpm.NewExporter(pm) if fixProcessCount { log.Info("Idle/Active/Total Processes will be calculated by php-fpm_exporter.") exporter.CountProcessState = true } prometheus.MustRegister(exporter) srv := &http.Server{ Addr: listeningAddress, // Good practice to set timeouts to avoid Slowloris attacks. WriteTimeout: time.Second * 15, ReadTimeout: time.Second * 15, IdleTimeout: time.Second * 60, } http.Handle(metricsEndpoint, promhttp.Handler()) http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { _, err := w.Write([]byte(` php-fpm_exporter

php-fpm_exporter

Metrics

`)) if err != nil { log.Error() } }) // Run our server in a goroutine so that it doesn't block. go func() { if err := srv.ListenAndServe(); err != nil { log.Error(err) } }() c := make(chan os.Signal, 1) // We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C) or SIGTERM // SIGKILL, SIGQUIT will not be caught. signal.Notify(c, os.Interrupt, syscall.SIGTERM) // Block until we receive our signal. <-c // Create a deadline to wait for. wait := time.Second * 10 ctx, cancel := context.WithTimeout(context.Background(), wait) defer cancel() // Doesn't block if no connections, but will otherwise wait // until the timeout deadline. if err := srv.Shutdown(ctx); err != nil { log.Fatal("Error during shutdown", err) } // Optionally, you could run srv.Shutdown in a goroutine and block on // <-ctx.Done() if your application should wait for other services // to finalize based on context cancellation. log.Info("Shutting down") os.Exit(0) }, } func init() { RootCmd.AddCommand(serverCmd) serverCmd.Flags().StringVar(&listeningAddress, "web.listen-address", ":9253", "Address on which to expose metrics and web interface.") serverCmd.Flags().StringVar(&metricsEndpoint, "web.telemetry-path", "/metrics", "Path under which to expose metrics.") serverCmd.Flags().StringSliceVar(&scrapeURIs, "phpfpm.scrape-uri", []string{"tcp://127.0.0.1:9000/status"}, "FastCGI address, e.g. unix:///tmp/php.sock;/status or tcp://127.0.0.1:9000/status") serverCmd.Flags().BoolVar(&fixProcessCount, "phpfpm.fix-process-count", false, "Enable to calculate process numbers via php-fpm_exporter since PHP-FPM sporadically reports wrong active/idle/total process numbers.") // Workaround since vipers BindEnv is currently not working as expected (see https://github.com/spf13/viper/issues/461) envs := map[string]string{ "PHP_FPM_WEB_LISTEN_ADDRESS": "web.listen-address", "PHP_FPM_WEB_TELEMETRY_PATH": "web.telemetry-path", "PHP_FPM_SCRAPE_URI": "phpfpm.scrape-uri", "PHP_FPM_FIX_PROCESS_COUNT": "phpfpm.fix-process-count", } mapEnvVars(envs, serverCmd) }