func configureClusterOpts(opts *server.Options) error {
// If we don't have cluster defined in the configuration
// file and no cluster listen string override, but we do
// have a routes override, we need to report misconfiguration.
if opts.Cluster.ListenStr == "" && opts.Cluster.Host == "" &&
opts.Cluster.Port == 0 {
if opts.RoutesStr != "" {
server.PrintAndDie("Solicited routes require cluster capabilities, e.g. --cluster.")
}
return nil
}
// If cluster flag override, process it
if opts.Cluster.ListenStr != "" {
clusterURL, err := url.Parse(opts.Cluster.ListenStr)
h, p, err := net.SplitHostPort(clusterURL.Host)
if err != nil {
return err
}
opts.Cluster.Host = h
_, err = fmt.Sscan(p, &opts.Cluster.Port)
if err != nil {
return err
}
if clusterURL.User != nil {
pass, hasPassword := clusterURL.User.Password()
if !hasPassword {
return fmt.Errorf("Expected cluster password to be set.")
}
opts.Cluster.Password = pass
user := clusterURL.User.Username()
opts.Cluster.Username = user
} else {
// Since we override from flag and there is no user/pwd, make
// sure we clear what we may have gotten from config file.
opts.Cluster.Username = ""
opts.Cluster.Password = ""
}
}
// If we have routes but no config file, fill in here.
if opts.RoutesStr != "" && opts.Routes == nil {
opts.Routes = server.RoutesFromStr(opts.RoutesStr)
}
return nil
}
func configureClusterOpts(opts *server.Options) error {
if opts.ClusterListenStr == "" {
if opts.RoutesStr != "" {
server.PrintAndDie("Solicited routes require cluster capabilities, e.g. --cluster.")
}
return nil
}
clusterURL, err := url.Parse(opts.ClusterListenStr)
h, p, err := net.SplitHostPort(clusterURL.Host)
if err != nil {
return err
}
opts.ClusterHost = h
_, err = fmt.Sscan(p, &opts.ClusterPort)
if err != nil {
return err
}
if clusterURL.User != nil {
pass, hasPassword := clusterURL.User.Password()
if !hasPassword {
return fmt.Errorf("Expected cluster password to be set.")
}
opts.ClusterPassword = pass
user := clusterURL.User.Username()
opts.ClusterUsername = user
}
// If we have routes but no config file, fill in here.
if opts.RoutesStr != "" && opts.Routes == nil {
opts.Routes = server.RoutesFromStr(opts.RoutesStr)
}
return nil
}
func main() {
// Server Options
opts := server.Options{}
var showVersion bool
var debugAndTrace bool
var configFile string
var showTLSHelp bool
// Parse flags
flag.IntVar(&opts.Port, "port", 0, "Port to listen on.")
flag.IntVar(&opts.Port, "p", 0, "Port to listen on.")
flag.StringVar(&opts.Host, "addr", "", "Network host to listen on.")
flag.StringVar(&opts.Host, "a", "", "Network host to listen on.")
flag.StringVar(&opts.Host, "net", "", "Network host to listen on.")
flag.BoolVar(&opts.Debug, "D", false, "Enable Debug logging.")
flag.BoolVar(&opts.Debug, "debug", false, "Enable Debug logging.")
flag.BoolVar(&opts.Trace, "V", false, "Enable Trace logging.")
flag.BoolVar(&opts.Trace, "trace", false, "Enable Trace logging.")
flag.BoolVar(&debugAndTrace, "DV", false, "Enable Debug and Trace logging.")
flag.BoolVar(&opts.Logtime, "T", true, "Timestamp log entries.")
flag.BoolVar(&opts.Logtime, "logtime", true, "Timestamp log entries.")
flag.StringVar(&opts.Username, "user", "", "Username required for connection.")
flag.StringVar(&opts.Password, "pass", "", "Password required for connection.")
flag.StringVar(&opts.Authorization, "auth", "", "Authorization token required for connection.")
flag.IntVar(&opts.HTTPPort, "m", 0, "HTTP Port for /varz, /connz endpoints.")
flag.IntVar(&opts.HTTPPort, "http_port", 0, "HTTP Port for /varz, /connz endpoints.")
flag.IntVar(&opts.HTTPSPort, "ms", 0, "HTTPS Port for /varz, /connz endpoints.")
flag.IntVar(&opts.HTTPSPort, "https_port", 0, "HTTPS Port for /varz, /connz endpoints.")
flag.StringVar(&configFile, "c", "", "Configuration file.")
flag.StringVar(&configFile, "config", "", "Configuration file.")
flag.StringVar(&opts.PidFile, "P", "", "File to store process pid.")
flag.StringVar(&opts.PidFile, "pid", "", "File to store process pid.")
flag.StringVar(&opts.LogFile, "l", "", "File to store logging output.")
flag.StringVar(&opts.LogFile, "log", "", "File to store logging output.")
flag.BoolVar(&opts.Syslog, "s", false, "Enable syslog as log method.")
flag.BoolVar(&opts.Syslog, "syslog", false, "Enable syslog as log method..")
flag.StringVar(&opts.RemoteSyslog, "r", "", "Syslog server addr (udp://localhost:514).")
flag.StringVar(&opts.RemoteSyslog, "remote_syslog", "", "Syslog server addr (udp://localhost:514).")
flag.BoolVar(&showVersion, "version", false, "Print version information.")
flag.BoolVar(&showVersion, "v", false, "Print version information.")
flag.IntVar(&opts.ProfPort, "profile", 0, "Profiling HTTP port")
flag.StringVar(&opts.RoutesStr, "routes", "", "Routes to actively solicit a connection.")
flag.StringVar(&opts.ClusterListenStr, "cluster", "", "Cluster url from which members can solicit routes.")
flag.StringVar(&opts.ClusterListenStr, "cluster_listen", "", "Cluster url from which members can solicit routes.")
flag.BoolVar(&showTLSHelp, "help_tls", false, "TLS help.")
flag.BoolVar(&opts.TLS, "tls", false, "Enable TLS.")
flag.BoolVar(&opts.TLSVerify, "tlsverify", false, "Enable TLS with client verification.")
flag.StringVar(&opts.TLSCert, "tlscert", "", "Server certificate file.")
flag.StringVar(&opts.TLSKey, "tlskey", "", "Private key for server certificate.")
flag.StringVar(&opts.TLSCaCert, "tlscacert", "", "Client certificate CA for verification.")
flag.Usage = usage
flag.Parse()
// Show version and exit
if showVersion {
server.PrintServerAndExit()
}
if showTLSHelp {
server.PrintTLSHelpAndDie()
}
// One flag can set multiple options.
if debugAndTrace {
opts.Trace, opts.Debug = true, true
}
// Process args looking for non-flag options,
// 'version' and 'help' only for now
for _, arg := range flag.Args() {
switch strings.ToLower(arg) {
case "version":
server.PrintServerAndExit()
case "help":
usage()
}
}
// Parse config if given
if configFile != "" {
fileOpts, err := server.ProcessConfigFile(configFile)
if err != nil {
server.PrintAndDie(err.Error())
}
opts = *server.MergeOptions(fileOpts, &opts)
}
// Remove any host/ip that points to itself in Route
newroutes, err := server.RemoveSelfReference(opts.ClusterPort, opts.Routes)
if err != nil {
server.PrintAndDie(err.Error())
}
opts.Routes = newroutes
// Configure TLS based on any present flags
configureTLS(&opts)
// Configure cluster opts if explicitly set via flags.
err = configureClusterOpts(&opts)
if err != nil {
server.PrintAndDie(err.Error())
}
// Create the server with appropriate options.
s := server.New(&opts)
// Configure the authentication mechanism
configureAuth(s, &opts)
// Configure the logger based on the flags
configureLogger(s, &opts)
// Start things up. Block here until done.
s.Start()
}
func main() {
// Server Options
opts := server.Options{}
var showVersion bool
var debugAndTrace bool
var configFile string
// Parse flags
flag.IntVar(&opts.Port, "port", 0, "Port to listen on.")
flag.IntVar(&opts.Port, "p", 0, "Port to listen on.")
flag.StringVar(&opts.Host, "addr", "", "Network host to listen on.")
flag.StringVar(&opts.Host, "a", "", "Network host to listen on.")
flag.StringVar(&opts.Host, "net", "", "Network host to listen on.")
flag.BoolVar(&opts.Debug, "D", false, "Enable Debug logging.")
flag.BoolVar(&opts.Debug, "debug", false, "Enable Debug logging.")
flag.BoolVar(&opts.Trace, "V", false, "Enable Trace logging.")
flag.BoolVar(&opts.Trace, "trace", false, "Enable Trace logging.")
flag.BoolVar(&debugAndTrace, "DV", false, "Enable Debug and Trace logging.")
flag.BoolVar(&opts.Logtime, "T", true, "Timestamp log entries.")
flag.BoolVar(&opts.Logtime, "logtime", true, "Timestamp log entries.")
flag.StringVar(&opts.Username, "user", "", "Username required for connection.")
flag.StringVar(&opts.Password, "pass", "", "Password required for connection.")
flag.StringVar(&opts.Authorization, "auth", "", "Authorization token required for connection.")
flag.IntVar(&opts.HTTPPort, "m", 0, "HTTP Port for /varz, /connz endpoints.")
flag.IntVar(&opts.HTTPPort, "http_port", 0, "HTTP Port for /varz, /connz endpoints.")
flag.StringVar(&configFile, "c", "", "Configuration file.")
flag.StringVar(&configFile, "config", "", "Configuration file.")
flag.StringVar(&opts.PidFile, "P", "", "File to store process pid.")
flag.StringVar(&opts.PidFile, "pid", "", "File to store process pid.")
flag.StringVar(&opts.LogFile, "l", "", "File to store logging output.")
flag.StringVar(&opts.LogFile, "log", "", "File to store logging output.")
flag.BoolVar(&opts.Syslog, "s", false, "Enable syslog as log method.")
flag.BoolVar(&opts.Syslog, "syslog", false, "Enable syslog as log method..")
flag.StringVar(&opts.RemoteSyslog, "r", "", "Syslog server addr (udp://localhost:514).")
flag.StringVar(&opts.RemoteSyslog, "remote_syslog", "", "Syslog server addr (udp://localhost:514).")
flag.BoolVar(&showVersion, "version", false, "Print version information.")
flag.BoolVar(&showVersion, "v", false, "Print version information.")
flag.IntVar(&opts.ProfPort, "profile", 0, "Profiling HTTP port")
flag.StringVar(&opts.RoutesStr, "routes", "", "Routes to actively solicit a connection.")
// Not public per se, will be replaced with dynamic system, but can be used to lower memory footprint when
// lots of connections present.
flag.IntVar(&opts.BufSize, "bs", 0, "Read/Write buffer size per client connection.")
flag.Usage = server.Usage
flag.Parse()
// Show version and exit
if showVersion {
server.PrintServerAndExit()
}
// One flag can set multiple options.
if debugAndTrace {
opts.Trace, opts.Debug = true, true
}
// Process args looking for non-flag options,
// 'version' and 'help' only for now
for _, arg := range flag.Args() {
switch strings.ToLower(arg) {
case "version":
server.PrintServerAndExit()
case "help":
server.Usage()
}
}
// Parse config if given
if configFile != "" {
fileOpts, err := server.ProcessConfigFile(configFile)
if err != nil {
server.PrintAndDie(err.Error())
}
opts = *server.MergeOptions(fileOpts, &opts)
}
// Remove any host/ip that points to itself in Route
newroutes, err := server.RemoveSelfReference(opts.ClusterPort, opts.Routes)
if err != nil {
server.PrintAndDie(err.Error())
}
opts.Routes = newroutes
// Create the server with appropriate options.
s := server.New(&opts)
// Configure the authentication mechanism
configureAuth(s, &opts)
// Configure the logger based on the flags
configureLogger(s, &opts)
// Start things up. Block here until done.
s.Start()
}