github.com/jpetazzo/etcd@v0.2.1-0.20140113055439-97f1363afac5/etcd.go (about)

     1  /*
     2  Copyright 2013 CoreOS Inc.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8       http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"fmt"
    21  	"os"
    22  	"time"
    23  
    24  	"github.com/coreos/etcd/log"
    25  	"github.com/coreos/etcd/server"
    26  	"github.com/coreos/etcd/store"
    27  	"github.com/coreos/raft"
    28  )
    29  
    30  func main() {
    31  	// Load configuration.
    32  	var config = server.NewConfig()
    33  	if err := config.Load(os.Args[1:]); err != nil {
    34  		fmt.Println(server.Usage() + "\n")
    35  		fmt.Println(err.Error() + "\n")
    36  		os.Exit(1)
    37  	} else if config.ShowVersion {
    38  		fmt.Println(server.ReleaseVersion)
    39  		os.Exit(0)
    40  	} else if config.ShowHelp {
    41  		fmt.Println(server.Usage() + "\n")
    42  		os.Exit(0)
    43  	}
    44  
    45  	// Enable options.
    46  	if config.VeryVeryVerbose {
    47  		log.Verbose = true
    48  		raft.SetLogLevel(raft.Trace)
    49  	} else if config.VeryVerbose {
    50  		log.Verbose = true
    51  		raft.SetLogLevel(raft.Debug)
    52  	} else if config.Verbose {
    53  		log.Verbose = true
    54  	}
    55  	if config.CPUProfileFile != "" {
    56  		profile(config.CPUProfileFile)
    57  	}
    58  
    59  	if config.DataDir == "" {
    60  		log.Fatal("The data dir was not set and could not be guessed from machine name")
    61  	}
    62  
    63  	// Create data directory if it doesn't already exist.
    64  	if err := os.MkdirAll(config.DataDir, 0744); err != nil {
    65  		log.Fatalf("Unable to create path: %s", err)
    66  	}
    67  
    68  	// Load info object.
    69  	info, err := config.Info()
    70  	if err != nil {
    71  		log.Fatal("info:", err)
    72  	}
    73  
    74  	// Retrieve TLS configuration.
    75  	tlsConfig, err := info.EtcdTLS.Config()
    76  	if err != nil {
    77  		log.Fatal("Client TLS:", err)
    78  	}
    79  	peerTLSConfig, err := info.RaftTLS.Config()
    80  	if err != nil {
    81  		log.Fatal("Peer TLS:", err)
    82  	}
    83  
    84  	// Create etcd key-value store and registry.
    85  	store := store.New()
    86  	registry := server.NewRegistry(store)
    87  
    88  	// Create peer server.
    89  	ps := server.NewPeerServer(info.Name, config.DataDir, info.RaftURL, info.RaftListenHost, &peerTLSConfig, &info.RaftTLS, registry, store, config.SnapshotCount)
    90  	ps.MaxClusterSize = config.MaxClusterSize
    91  	ps.RetryTimes = config.MaxRetryAttempts
    92  	if config.Peer.HeartbeatTimeout > 0 {
    93  		ps.HeartbeatTimeout = time.Duration(config.Peer.HeartbeatTimeout) * time.Millisecond
    94  	}
    95  	if config.Peer.ElectionTimeout > 0 {
    96  		ps.ElectionTimeout = time.Duration(config.Peer.ElectionTimeout) * time.Millisecond
    97  	}
    98  
    99  	// Create client server.
   100  	s := server.New(info.Name, info.EtcdURL, info.EtcdListenHost, &tlsConfig, &info.EtcdTLS, ps, registry, store)
   101  	if err := s.AllowOrigins(config.CorsOrigins); err != nil {
   102  		panic(err)
   103  	}
   104  
   105  	ps.SetServer(s)
   106  
   107  	// Run peer server in separate thread while the client server blocks.
   108  	go func() {
   109  		log.Fatal(ps.ListenAndServe(config.Snapshot, config.Peers))
   110  	}()
   111  	log.Fatal(s.ListenAndServe())
   112  }