func getDomainDiscoveryFlagValue(c *cli.Context) ([]string, error) {
domainstr, insecure := getDiscoveryDomain(c)
// If we still don't have domain discovery, return nothing
if domainstr == "" {
return []string{}, nil
}
discoverer := client.NewSRVDiscover()
eps, err := discoverer.Discover(domainstr)
if err != nil {
return nil, err
}
if insecure {
return eps, err
}
// strip insecure connections
ret := []string{}
for _, ep := range eps {
if strings.HasPrefix("http://", ep) {
fmt.Fprintf(os.Stderr, "ignoring discovered insecure endpoint %q\n", ep)
continue
}
ret = append(ret, ep)
}
return ret, err
}
func startGateway(cmd *cobra.Command, args []string) {
endpoints := gatewayEndpoints
if gatewayDNSCluster != "" {
eps, err := client.NewSRVDiscover().Discover(gatewayDNSCluster)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
plog.Infof("discovered the cluster %s from %s", eps, gatewayDNSCluster)
}
l, err := net.Listen("tcp", gatewayListenAddr)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
tp := tcpproxy.TCPProxy{
Listener: l,
Endpoints: endpoints,
MonitorInterval: getewayRetryDelay,
}
tp.Run()
}
func startGateway(cmd *cobra.Command, args []string) {
endpoints := gatewayEndpoints
if gatewayDNSCluster != "" {
eps, err := client.NewSRVDiscover().Discover(gatewayDNSCluster)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
plog.Infof("discovered the cluster %s from %s", eps, gatewayDNSCluster)
// confirm TLS connections are good
if !gatewayInsecureDiscovery {
tlsInfo := transport.TLSInfo{
TrustedCAFile: gatewayCA,
ServerName: gatewayDNSCluster,
}
plog.Infof("validating discovered endpoints %v", eps)
endpoints, err = transport.ValidateSecureEndpoints(tlsInfo, eps)
if err != nil {
plog.Warningf("%v", err)
}
plog.Infof("using discovered endpoints %v", endpoints)
}
}
if len(endpoints) == 0 {
plog.Fatalf("no endpoints found")
}
l, err := net.Listen("tcp", gatewayListenAddr)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
tp := tcpproxy.TCPProxy{
Listener: l,
Endpoints: endpoints,
MonitorInterval: getewayRetryDelay,
}
tp.Run()
}
func getDomainDiscoveryFlagValue(c *cli.Context) ([]string, error) {
domainstr := c.GlobalString("discovery-srv")
// Use an environment variable if nothing was supplied on the
// command line
if domainstr == "" {
domainstr = os.Getenv("ETCDCTL_DISCOVERY_SRV")
}
// If we still don't have domain discovery, return nothing
if domainstr == "" {
return []string{}, nil
}
discoverer := client.NewSRVDiscover()
eps, err := discoverer.Discover(domainstr)
if err != nil {
return nil, err
}
return eps, err
}