106 lines
3.8 KiB
Go
106 lines
3.8 KiB
Go
// Copyright © 2018 Enrico Stahn <enrico.stahn@gmail.com>
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package cmd
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import (
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"fmt"
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"github.com/hipages/php-fpm_exporter/phpfpm"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/spf13/cobra"
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"net/http"
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"os"
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)
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// Configuration variables
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var (
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listeningAddress string
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metricsEndpoint string
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scrapeURIs []string
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customLabelNames []string
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customLabelValues []string
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)
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// serverCmd represents the server command
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var serverCmd = &cobra.Command{
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Use: "server",
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Short: "A brief description of your command",
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Long: `A longer description that spans multiple lines and likely contains examples
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and usage of using your command. For example:
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Cobra is a CLI library for Go that empowers applications.
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This application is a tool to generate the needed files
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to quickly create a Cobra application.`,
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Run: func(cmd *cobra.Command, args []string) {
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log.Infof("Starting server on %v with path %v", listeningAddress, metricsEndpoint)
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pm := phpfpm.PoolManager{}
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for _, uri := range scrapeURIs {
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pm.Add(uri)
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}
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exporter := phpfpm.NewExporter(pm)
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prometheus.MustRegister(exporter)
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http.Handle(metricsEndpoint, promhttp.Handler())
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte(`<html>
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<head><title>Apache Exporter</title></head>
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<body>
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<h1>Apache Exporter</h1>
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<p><a href='` + metricsEndpoint + `'>Metrics</a></p>
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</body>
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</html>`))
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})
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log.Fatal(http.ListenAndServe(listeningAddress, nil))
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},
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}
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func init() {
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RootCmd.AddCommand(serverCmd)
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// Here you will define your flags and configuration settings.
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// Cobra supports Persistent Flags which will work for this command
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// and all subcommands, e.g.:
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// serverCmd.PersistentFlags().String("foo", "", "A help for foo")
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// Cobra supports local flags which will only run when this command
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// is called directly, e.g.:
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serverCmd.Flags().StringVar(&listeningAddress, "web.listen-address", ":9253", "Address on which to expose metrics and web interface.")
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serverCmd.Flags().StringVar(&metricsEndpoint, "web.telemetry-path", "/metrics", "Path under which to expose metrics.")
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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")
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serverCmd.Flags().StringSliceVar(&customLabelNames, "phpfpm.label-name", []string{}, "Name of the custom label that will be inserted.")
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serverCmd.Flags().StringSliceVar(&customLabelValues, "phpfpm.label-value", []string{}, "Value of the custom label that will be inserted.")
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//viper.BindEnv("web.listen-address", "PHP_FPM_WEB_LISTEN_ADDRESS")
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//viper.BindPFlag("web.listen-address", serverCmd.Flags().Lookup("web.listen-address"))
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// Workaround since vipers BindEnv is currently not working as expected (see https://github.com/spf13/viper/issues/461)
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envs := map[string]string{
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"PHP_FPM_WEB_LISTEN_ADDRESS": "web.listen-address",
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"PHP_FPM_WEB_TELEMETRY_PATH": "web.telemetry-path",
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"PHP_FPM_SCRAPE_URI": "phpfpm.scrape-uri",
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}
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for env, flag := range envs {
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flag := serverCmd.Flags().Lookup(flag)
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flag.Usage = fmt.Sprintf("%v [env %v]", flag.Usage, env)
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if value := os.Getenv(env); value != "" {
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flag.Value.Set(value)
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}
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}
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}
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