// parseConfig parses out the input config from cmdline arguments and
// environment variables.
func parseConfig(args []string) (*flag.FlagSet, error) {
fs := flag.NewFlagSet("full flagset", flag.ContinueOnError)
fs.Usage = func() {}
etcdmain.NewConfig().VisitAll(func(f *flag.Flag) {
_, isBoolFlag := f.Value.(boolFlag)
fs.Var(&value{isBoolFlag: isBoolFlag}, f.Name, "")
})
if err := fs.Parse(args); err != nil && err != flag.ErrHelp {
return nil, err
}
if err := flags.SetFlagsFromEnv(fs); err != nil {
return nil, err
}
return fs, nil
}
func (cfg *config) Parse(arguments []string) error {
perr := cfg.FlagSet.Parse(arguments)
switch perr {
case nil:
case flag.ErrHelp:
os.Exit(0)
default:
os.Exit(2)
}
if cfg.printVersion {
fmt.Println("etcd version", version.Version)
os.Exit(0)
}
err := flags.SetFlagsFromEnv(cfg.FlagSet)
if err != nil {
log.Fatalf("etcd: %v", err)
}
set := make(map[string]bool)
cfg.FlagSet.Visit(func(f *flag.Flag) {
set[f.Name] = true
})
nSet := 0
for _, v := range []bool{set["discovery"], set["initial-cluster"], set["discovery-srv"]} {
if v {
nSet += 1
}
}
if nSet > 1 {
return ErrConflictBootstrapFlags
}
flags.SetBindAddrFromAddr(cfg.FlagSet, "peer-bind-addr", "peer-addr")
flags.SetBindAddrFromAddr(cfg.FlagSet, "bind-addr", "addr")
cfg.lpurls, err = flags.URLsFromFlags(cfg.FlagSet, "listen-peer-urls", "peer-bind-addr", cfg.peerTLSInfo)
if err != nil {
return err
}
cfg.apurls, err = flags.URLsFromFlags(cfg.FlagSet, "initial-advertise-peer-urls", "peer-addr", cfg.peerTLSInfo)
if err != nil {
return err
}
cfg.lcurls, err = flags.URLsFromFlags(cfg.FlagSet, "listen-client-urls", "bind-addr", cfg.clientTLSInfo)
if err != nil {
return err
}
cfg.acurls, err = flags.URLsFromFlags(cfg.FlagSet, "advertise-client-urls", "addr", cfg.clientTLSInfo)
if err != nil {
return err
}
if err := cfg.resolveUrls(); err != nil {
return errors.New("cannot resolve DNS hostnames.")
}
if 5*cfg.TickMs > cfg.ElectionMs {
return fmt.Errorf("-election-timeout[%vms] should be at least as 5 times as -heartbeat-interval[%vms]", cfg.ElectionMs, cfg.TickMs)
}
return nil
}