Esempio n. 1
0
func main() {
	userset := flag.NewFlagSet("fleet", flag.ExitOnError)
	printVersion := userset.Bool("version", false, "Print the version and exit")
	cfgPath := userset.String("config", "", fmt.Sprintf("Path to config file. Fleet will look for a config at %s by default.", DefaultConfigFile))

	err := userset.Parse(os.Args[1:])
	if err == flag.ErrHelp {
		userset.Usage()
		os.Exit(1)
	}

	args := userset.Args()
	if len(args) == 1 && args[0] == "version" {
		*printVersion = true
	} else if len(args) != 0 {
		userset.Usage()
		os.Exit(1)
	}

	if *printVersion {
		fmt.Println("fleetd version", version.Version)
		os.Exit(0)
	}

	log.Infof("Starting fleetd version %v", version.Version)

	cfgset := flag.NewFlagSet("fleet", flag.ExitOnError)
	cfgset.Int("verbosity", 0, "Logging level")
	cfgset.Var(&stringSlice{}, "etcd_servers", "List of etcd endpoints")
	cfgset.String("etcd_keyfile", "", "SSL key file used to secure etcd communication")
	cfgset.String("etcd_certfile", "", "SSL certification file used to secure etcd communication")
	cfgset.String("etcd_cafile", "", "SSL Certificate Authority file used to secure etcd communication")
	cfgset.String("etcd_key_prefix", registry.DefaultKeyPrefix, "Keyspace for fleet data in etcd")
	cfgset.Float64("etcd_request_timeout", 1.0, "Amount of time in seconds to allow a single etcd request before considering it failed.")
	cfgset.Float64("engine_reconcile_interval", 2.0, "Interval at which the engine should reconcile the cluster schedule in etcd.")
	cfgset.String("public_ip", "", "IP address that fleet machine should publish")
	cfgset.String("metadata", "", "List of key-value metadata to assign to the fleet machine")
	cfgset.String("agent_ttl", agent.DefaultTTL, "TTL in seconds of fleet machine state in etcd")
	cfgset.Bool("verify_units", false, "DEPRECATED - This option is ignored")
	cfgset.String("authorized_keys_file", "", "DEPRECATED - This option is ignored")

	globalconf.Register("", cfgset)
	cfg, err := getConfig(cfgset, *cfgPath)
	if err != nil {
		log.Fatalf(err.Error())
	}

	log.Debugf("Creating Server")
	srv, err := server.New(*cfg)
	if err != nil {
		log.Fatalf("Failed creating Server: %v", err.Error())
	}
	srv.Run()

	reconfigure := func() {
		log.Infof("Reloading configuration from %s", *cfgPath)

		cfg, err := getConfig(cfgset, *cfgPath)
		if err != nil {
			log.Fatalf(err.Error())
		}

		log.Infof("Restarting server components")
		srv.Stop()

		srv, err = server.New(*cfg)
		if err != nil {
			log.Fatalf(err.Error())
		}
		srv.Run()
	}

	shutdown := func() {
		log.Infof("Gracefully shutting down")
		srv.Stop()
		srv.Purge()
		os.Exit(0)
	}

	writeState := func() {
		log.Infof("Dumping server state")

		encoded, err := json.Marshal(srv)
		if err != nil {
			log.Errorf("Failed to dump server state: %v", err)
			return
		}

		if _, err := os.Stdout.Write(encoded); err != nil {
			log.Errorf("Failed to dump server state: %v", err)
			return
		}

		os.Stdout.Write([]byte("\n"))

		log.Debugf("Finished dumping server state")
	}

	signals := map[os.Signal]func(){
		syscall.SIGHUP:  reconfigure,
		syscall.SIGTERM: shutdown,
		syscall.SIGINT:  shutdown,
		syscall.SIGUSR1: writeState,
	}

	listenForSignals(signals)
}
Esempio n. 2
0
func Main() {
	userset := flag.NewFlagSet("fleet", flag.ExitOnError)
	printVersion := userset.Bool("version", false, "Print the version and exit")
	cfgPath := userset.String("config", "", fmt.Sprintf("Path to config file. Fleet will look for a config at %s by default.", DefaultConfigFile))

	userset.Usage = func() {
		fmt.Fprintf(os.Stderr, "%s\nUsage of %s:\n", FleetdDescription, os.Args[0])
		userset.PrintDefaults()
	}

	err := userset.Parse(os.Args[1:])
	if err != nil {
		userset.Usage()
		os.Exit(1)
	}

	args := userset.Args()
	if len(args) > 0 {
		// support `fleetd version` the same as `fleetd --version`
		if args[0] == "version" {
			*printVersion = true
		} else {
			fmt.Fprintf(os.Stderr, "%s takes no arguments. Did you mean to invoke fleetctl instead?\n", os.Args[0])
			userset.Usage()
			os.Exit(1)
		}
	}

	if *printVersion {
		fmt.Println("fleetd version", version.Version)
		os.Exit(0)
	}

	log.Infof("Starting fleetd version %v", version.Version)

	cfgset := flag.NewFlagSet("fleet", flag.ExitOnError)
	cfgset.Int("verbosity", 0, "Logging level")
	cfgset.Var(&pkg.StringSlice{"http://127.0.0.1:2379", "http://127.0.0.1:4001"}, "etcd_servers", "List of etcd endpoints")
	cfgset.String("etcd_username", "", "username for secure etcd communication")
	cfgset.String("etcd_password", "", "password for secure etcd communication")
	cfgset.String("etcd_keyfile", "", "SSL key file used to secure etcd communication")
	cfgset.String("etcd_certfile", "", "SSL certification file used to secure etcd communication")
	cfgset.String("etcd_cafile", "", "SSL Certificate Authority file used to secure etcd communication")
	cfgset.String("etcd_key_prefix", registry.DefaultKeyPrefix, "Keyspace for fleet data in etcd")
	cfgset.Float64("etcd_request_timeout", 1.0, "Amount of time in seconds to allow a single etcd request before considering it failed.")
	cfgset.Float64("engine_reconcile_interval", 2.0, "Interval at which the engine should reconcile the cluster schedule in etcd.")
	cfgset.String("public_ip", "", "IP address that fleet machine should publish")
	cfgset.String("metadata", "", "List of key-value metadata to assign to the fleet machine")
	cfgset.String("agent_ttl", agent.DefaultTTL, "TTL in seconds of fleet machine state in etcd")
	cfgset.String("units_directory", "/run/fleet/units/", "Path to the fleet units directory")
	cfgset.Bool("systemd_user", false, "When true use systemd --user)")
	cfgset.Int("token_limit", 100, "Maximum number of entries per page returned from API requests")
	cfgset.Bool("enable_grpc", false, "When possible, uses grpc to communicate between engine and agent")
	cfgset.Bool("disable_engine", false, "Disable the engine entirely, use with care")
	cfgset.Bool("disable_watches", false, "Disable the use of etcd watches. Increases scheduling latency")
	cfgset.Bool("verify_units", false, "DEPRECATED - This option is ignored")
	cfgset.String("authorized_keys_file", "", "DEPRECATED - This option is ignored")

	globalconf.Register("", cfgset)
	cfg, err := getConfig(cfgset, *cfgPath)
	if err != nil {
		log.Fatal(err)
	}

	log.Debugf("Creating Server")
	srv, err := server.New(*cfg, nil)
	if err != nil {
		log.Fatalf("Failed creating Server: %v", err)
	}
	srv.Run()

	srvMutex := sync.Mutex{}

	reconfigure := func() {
		log.Infof("Reloading configuration from %s", *cfgPath)

		srvMutex.Lock()
		defer srvMutex.Unlock()

		cfg, err := getConfig(cfgset, *cfgPath)
		if err != nil {
			log.Fatal(err)
		}

		log.Infof("Restarting server components")
		srv.SetReconfigServer(true)

		// Get Server.listeners[] to keep it for a new server,
		// before killing the old server.
		oldListeners := srv.GetApiServerListeners()

		srv.Kill()

		// The new server takes the original listeners.
		srv, err = server.New(*cfg, oldListeners)
		if err != nil {
			log.Fatal(err)
		}

		srv.Run()
		srv.SetReconfigServer(false)
	}

	shutdown := func() {
		log.Infof("Gracefully shutting down")

		srvMutex.Lock()
		defer srvMutex.Unlock()

		srv.Kill()
		srv.Purge()
		os.Exit(0)
	}

	writeState := func() {
		log.Infof("Dumping server state")

		srvMutex.Lock()
		defer srvMutex.Unlock()

		encoded, err := json.Marshal(srv)
		if err != nil {
			log.Errorf("Failed to dump server state: %v", err)
			return
		}

		if _, err := os.Stdout.Write(encoded); err != nil {
			log.Errorf("Failed to dump server state: %v", err)
			return
		}

		os.Stdout.Write([]byte("\n"))

		log.Debugf("Finished dumping server state")
	}

	signals := map[os.Signal]func(){
		syscall.SIGHUP:  reconfigure,
		syscall.SIGTERM: shutdown,
		syscall.SIGINT:  shutdown,
		syscall.SIGUSR1: writeState,
	}

	listenForSignals(signals)
}
Esempio n. 3
0
File: fleet.go Progetto: jsdir/fleet
func main() {
	// We use a FlagSets since glog adds a bunch of flags we do not want to publish
	userset := flag.NewFlagSet("fleet", flag.ExitOnError)
	printVersion := userset.Bool("version", false, "Print the version and exit")
	cfgPath := userset.String("config", "", fmt.Sprintf("Path to config file. Fleet will look for a config at %s by default.", DefaultConfigFile))

	// Initialize logging so we have it set up while parsing config information
	config.UpdateLoggingFlagsFromConfig(flag.CommandLine, &config.Config{})

	err := userset.Parse(os.Args[1:])
	if err == flag.ErrHelp {
		userset.Usage()
		syscall.Exit(1)
	}

	if *printVersion {
		fmt.Println("fleet version", version.Version)
		os.Exit(0)
	}

	cfgset := flag.NewFlagSet("fleet", flag.ExitOnError)
	cfgset.Int("verbosity", 0, "Logging level")
	cfgset.Var(&stringSlice{}, "etcd_servers", "List of etcd endpoints")
	cfgset.String("boot_id", "", "Override default BootID of fleet machine")
	cfgset.String("public_ip", "", "IP address that fleet machine should publish")
	cfgset.String("metadata", "", "List of key-value metadata to assign to the fleet machine")
	cfgset.String("unit_prefix", "", "Prefix that should be used for all systemd units")
	cfgset.String("agent_ttl", agent.DefaultTTL, "TTL in seconds of fleet machine state in etcd")
	cfgset.Bool("verify_units", false, "Verify unit file signatures using local SSH identities")
	cfgset.String("authorized_keys_file", sign.DefaultAuthorizedKeysFile, "File containing public SSH keys to be used for signature verification")

	globalconf.Register("", cfgset)
	cfg, err := getConfig(cfgset, *cfgPath)
	if err != nil {
		glog.Error(err.Error())
		syscall.Exit(1)
	}

	srv := server.New(*cfg)
	srv.Run()

	reconfigure := func() {
		glog.Infof("Reloading configuration from %s", *cfgPath)

		cfg, err := getConfig(cfgset, *cfgPath)
		if err != nil {
			glog.Errorf(err.Error())
			syscall.Exit(1)
		}

		srv.Stop()

		srv = server.New(*cfg)
		srv.Run()
	}

	shutdown := func() {
		glog.Infof("Gracefully shutting down")
		srv.Stop()
		srv.Purge()
		syscall.Exit(0)
	}

	writeState := func() {
		glog.Infof("Dumping server state")

		encoded, err := json.Marshal(srv)
		if err != nil {
			glog.Errorf("Failed to dump server state: %v", err)
			return
		}

		if _, err := os.Stdout.Write(encoded); err != nil {
			glog.Errorf("Failed to dump server state: %v", err)
			return
		}

		os.Stdout.Write([]byte("\n"))

		glog.V(1).Infof("Finished dumping server state")
	}

	signals := map[os.Signal]func(){
		syscall.SIGHUP:  reconfigure,
		syscall.SIGTERM: shutdown,
		syscall.SIGINT:  shutdown,
		syscall.SIGUSR1: writeState,
	}

	listenForSignals(signals)
}
Esempio n. 4
0
func main() {
	// We use a FlagSets since glog adds a bunch of flags we do not want to publish
	userset := flag.NewFlagSet("fleet", flag.ExitOnError)
	printVersion := userset.Bool("version", false, "Print the version and exit")
	cfgPath := userset.String("config", "/etc/fleet/fleet.conf", "Path to config file")

	err := userset.Parse(os.Args[1:])
	if err == flag.ErrHelp {
		userset.Usage()
		syscall.Exit(1)
	}

	if *printVersion {
		fmt.Println("fleet version", version.Version)
		os.Exit(0)
	}

	cfgset := flag.NewFlagSet("fleet", flag.ExitOnError)
	cfgset.Int("verbosity", 0, "Logging level")
	cfgset.Var(&stringSlice{}, "etcd_servers", "List of etcd endpoints")
	cfgset.String("boot_id", "", "Override default BootID of fleet machine")
	cfgset.String("public_ip", "", "IP address that fleet machine should publish")
	cfgset.String("metadata", "", "List of key-value metadata to assign to the fleet machine")
	cfgset.String("unit_prefix", "", "Prefix that should be used for all systemd units")
	cfgset.String("agent_ttl", agent.DefaultTTL, "TTL in seconds of fleet machine state in etcd")

	globalconf.Register("", cfgset)
	cfg, err := getConfig(cfgset, *cfgPath)
	if err != nil {
		glog.Error(err.Error())
		syscall.Exit(1)
	}

	config.UpdateLoggingFlagsFromConfig(cfg)
	etcd.SetLogger(etcdLogger{})

	srv := server.New(*cfg)
	srv.Run()

	reconfigure := func() {
		glog.Infof("Reloading configuration from %s", *cfgPath)

		cfg, err := getConfig(cfgset, *cfgPath)
		if err != nil {
			glog.Errorf(err.Error())
			syscall.Exit(1)
		}

		srv.Stop()

		config.UpdateLoggingFlagsFromConfig(cfg)
		srv = server.New(*cfg)

		srv.Run()
	}

	shutdown := func() {
		glog.Infof("Gracefully shutting down")
		srv.Stop()
		srv.Purge()
		syscall.Exit(0)
	}

	signals := map[os.Signal]func(){
		syscall.SIGHUP:  reconfigure,
		syscall.SIGTERM: shutdown,
		syscall.SIGINT:  shutdown,
	}

	listenForSignals(signals)
}
Esempio n. 5
0
func main() {
	// We use a custom FlagSet since golang/glog adds a bunch of flags we
	// do not want to publish
	flagset := flag.NewFlagSet("fleet", flag.ExitOnError)
	printVersion := flagset.Bool("version", false, "Prints the version.")
	cfgPath := flagset.String("config", "", "Path to config file.")
	err := flagset.Parse(os.Args[1:])

	// We do this manually since we're using a custom FlagSet
	if err == flag.ErrHelp {
		flag.Usage()
		syscall.Exit(1)
	}

	if *printVersion {
		fmt.Println("fleet version", version.Version)
		os.Exit(0)
	}

	// Print out to stderr by default (stderr instead of stdout due to glog's choices)
	flag.Lookup("logtostderr").Value.Set("true")

	cfg, err := loadConfigFromPath(*cfgPath)
	if err != nil {
		glog.Errorf(err.Error())
		syscall.Exit(1)
	}

	etcd.SetLogger(etcdLogger{})

	srv := server.New(*cfg)
	srv.Run()

	reconfigure := func() {
		glog.Infof("Reloading config file from %s", *cfgPath)
		cfg, err := loadConfigFromPath(*cfgPath)
		if err != nil {
			glog.Errorf(err.Error())
			syscall.Exit(1)
		} else {
			srv.Stop()
			srv = server.New(*cfg)
			srv.Run()
		}
	}

	shutdown := func() {
		glog.Infof("Gracefully shutting down")
		srv.Stop()
		srv.Purge()
		syscall.Exit(0)
	}

	signals := map[os.Signal]func(){
		syscall.SIGHUP:  reconfigure,
		syscall.SIGTERM: shutdown,
		syscall.SIGINT:  shutdown,
	}

	listenForSignals(signals)
}