116 lines
2.9 KiB
Go
116 lines
2.9 KiB
Go
package main
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import (
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"os"
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"os/signal"
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"strings"
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"sync"
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cachet "github.com/castawaylabs/cachet-monitor"
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"github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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)
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var cfgFile string
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// rootCmd represents the base command when called without any subcommands
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var rootCmd = &cobra.Command{
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Use: "cmd",
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Short: "cachet-monitor",
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// Uncomment the following line if your bare application
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// has an action associated with it:
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Run: func(cmd *cobra.Command, args []string) {
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Action(cmd, args)
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},
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}
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func main() {
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if err := rootCmd.Execute(); err != nil {
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panic(err)
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}
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}
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func init() {
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// Here you will define your flags and configuration settings.
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// Cobra supports persistent flags, which, if defined here,
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// will be global for your application.
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pf := rootCmd.PersistentFlags()
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pf.StringVarP(&cfgFile, "config", "c", "", "config file (default is $(pwd)/config.yml)")
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pf.String("log", "", "log output")
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pf.String("format", "text", "log format [text/json]")
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pf.String("name", "", "machine name")
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pf.Bool("immediate", false, "Tick immediately (by default waits for first defined")
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}
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func Action(cmd *cobra.Command, args []string) {
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cfg, err := cachet.New(cfgFile)
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if err != nil {
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logrus.Panicf("Unable to start (reading config): %v", err)
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}
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if immediate, err := cmd.Flags().GetBool("immediate"); err == nil && immediate {
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cfg.Immediate = immediate
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}
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if name, err := cmd.Flags().GetString("name"); err == nil && len(name) > 0 {
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cfg.SystemName = name
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}
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logrus.SetOutput(getLogger(cmd))
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if format, err := cmd.Flags().GetString("format"); err == nil && format == "json" {
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logrus.SetFormatter(&logrus.JSONFormatter{})
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}
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if valid := cfg.Validate(); !valid {
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logrus.Errorf("Invalid configuration")
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os.Exit(1)
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}
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logrus.Debug("Configuration valid")
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logrus.Infof("System: %s", cfg.SystemName)
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// logrus.Infof("API: %s", cfg.API.URL)
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logrus.Infof("Monitors: %d", len(cfg.Monitors))
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logrus.Infof("Backend: %v", strings.Join(cfg.Backend.Describe(), "\n - "))
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logrus.Infof("Pinging backend")
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if err := cfg.Backend.Ping(); err != nil {
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logrus.Errorf("Cannot ping backend!\n%v", err)
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// os.Exit(1)
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}
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logrus.Infof("Ping OK")
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logrus.Warnf("Starting!")
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wg := &sync.WaitGroup{}
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for index, monitor := range cfg.Monitors {
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logrus.Infof("Starting Monitor #%d: ", index)
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logrus.Infof("Features: \n - %v", strings.Join(monitor.Describe(), "\n - "))
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go monitor.Start(monitor.GetTestFunc(), wg, cfg.Backend.Tick, cfg.Immediate)
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}
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, os.Interrupt, os.Kill)
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<-signals
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logrus.Warnf("Abort: Waiting for monitors to finish")
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for _, mon := range cfg.Monitors {
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mon.GetMonitor().Stop()
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}
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wg.Wait()
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}
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func getLogger(cmd *cobra.Command) *os.File {
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logPath, _ := cmd.Flags().GetString("log")
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if len(logPath) == 0 {
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return os.Stdout
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}
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file, err := os.Create(logPath)
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if err != nil {
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logrus.Errorf("Unable to open file '%v' for logging: \n%v", logPath, err)
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os.Exit(1)
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}
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return file
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}
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