122 lines
3.3 KiB
Go
122 lines
3.3 KiB
Go
// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package etcdmain
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import (
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"fmt"
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"net"
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"os"
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"time"
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"github.com/coreos/etcd/client"
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"github.com/coreos/etcd/pkg/transport"
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"github.com/coreos/etcd/proxy/tcpproxy"
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"github.com/spf13/cobra"
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)
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var (
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gatewayListenAddr string
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gatewayEndpoints []string
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gatewayDNSCluster string
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gatewayInsecureDiscovery bool
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getewayRetryDelay time.Duration
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gatewayCA string
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)
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var (
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rootCmd = &cobra.Command{
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Use: "etcd",
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Short: "etcd server",
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SuggestFor: []string{"etcd"},
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}
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)
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func init() {
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rootCmd.AddCommand(newGatewayCommand())
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}
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// newGatewayCommand returns the cobra command for "gateway".
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func newGatewayCommand() *cobra.Command {
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lpc := &cobra.Command{
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Use: "gateway <subcommand>",
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Short: "gateway related command",
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}
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lpc.AddCommand(newGatewayStartCommand())
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return lpc
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}
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func newGatewayStartCommand() *cobra.Command {
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cmd := cobra.Command{
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Use: "start",
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Short: "start the gateway",
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Run: startGateway,
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}
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cmd.Flags().StringVar(&gatewayListenAddr, "listen-addr", "127.0.0.1:23790", "listen address")
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cmd.Flags().StringVar(&gatewayDNSCluster, "discovery-srv", "", "DNS domain used to bootstrap initial cluster")
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cmd.Flags().BoolVar(&gatewayInsecureDiscovery, "insecure-discovery", false, "accept insecure SRV records")
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cmd.Flags().StringVar(&gatewayCA, "trusted-ca-file", "", "path to the client server TLS CA file.")
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cmd.Flags().StringSliceVar(&gatewayEndpoints, "endpoints", []string{"127.0.0.1:2379"}, "comma separated etcd cluster endpoints")
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cmd.Flags().DurationVar(&getewayRetryDelay, "retry-delay", time.Minute, "duration of delay before retrying failed endpoints")
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return &cmd
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}
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func startGateway(cmd *cobra.Command, args []string) {
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endpoints := gatewayEndpoints
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if gatewayDNSCluster != "" {
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eps, err := client.NewSRVDiscover().Discover(gatewayDNSCluster)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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plog.Infof("discovered the cluster %s from %s", eps, gatewayDNSCluster)
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// confirm TLS connections are good
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if !gatewayInsecureDiscovery {
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tlsInfo := transport.TLSInfo{
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TrustedCAFile: gatewayCA,
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ServerName: gatewayDNSCluster,
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}
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plog.Infof("validating discovered endpoints %v", eps)
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endpoints, err = transport.ValidateSecureEndpoints(tlsInfo, eps)
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if err != nil {
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plog.Warningf("%v", err)
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}
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plog.Infof("using discovered endpoints %v", endpoints)
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}
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}
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if len(endpoints) == 0 {
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plog.Fatalf("no endpoints found")
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}
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l, err := net.Listen("tcp", gatewayListenAddr)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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tp := tcpproxy.TCPProxy{
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Listener: l,
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Endpoints: endpoints,
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MonitorInterval: getewayRetryDelay,
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}
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tp.Run()
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}
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