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_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.Int("token_limit", 100, "Maximum number of entries per page returned from API requests")
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.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)
}
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)
}
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()
os.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("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.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, "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 {
log.Fatalf(err.Error())
}
log.V(1).Infof("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.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)
}
