// Unlock will attempt to remove the lock held on the mutex
// in the Registry.
func (t *TimedResourceMutex) Unlock() error {
_, err := t.etcd.CompareAndDelete(t.node.Key, "", t.node.CreatedIndex)
if err != nil {
err = fmt.Errorf("received error while unlocking mutex: %v", err)
log.Error(err)
return err
}
return nil
}
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)
}
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)
}