forked from etcd-io/etcd
/
main.go
233 lines (194 loc) · 6.72 KB
/
main.go
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package main
import (
"flag"
"fmt"
"log"
"net/http"
"os"
"strings"
"github.com/coreos/etcd/etcdserver"
"github.com/coreos/etcd/etcdserver/etcdhttp"
"github.com/coreos/etcd/pkg"
flagtypes "github.com/coreos/etcd/pkg/flags"
"github.com/coreos/etcd/pkg/transport"
"github.com/coreos/etcd/proxy"
"github.com/coreos/etcd/raft"
)
const (
// the owner can make/remove files inside the directory
privateDirMode = 0700
version = "0.5.0-alpha"
)
var (
name = flag.String("name", "default", "Unique human-readable name for this node")
dir = flag.String("data-dir", "", "Path to the data directory")
snapCount = flag.Uint64("snapshot-count", etcdserver.DefaultSnapCount, "Number of committed transactions to trigger a snapshot")
printVersion = flag.Bool("version", false, "Print the version and exit")
cluster = &etcdserver.Cluster{}
cors = &pkg.CORSInfo{}
proxyFlag = new(flagtypes.Proxy)
clientTLSInfo = transport.TLSInfo{}
peerTLSInfo = transport.TLSInfo{}
deprecated = []string{
"cluster-active-size",
"cluster-remove-delay",
"cluster-sync-interval",
"config",
"force",
"max-result-buffer",
"max-retry-attempts",
"peer-heartbeat-interval",
"peer-election-timeout",
"retry-interval",
"snapshot",
"v",
"vv",
}
)
func init() {
flag.Var(cluster, "bootstrap-config", "Initial cluster configuration for bootstrapping")
cluster.Set("default=http://localhost:2380,default=http://localhost:7001")
flag.Var(flagtypes.NewURLsValue("http://localhost:2380,http://localhost:7001"), "advertise-peer-urls", "List of this member's peer URLs to advertise to the rest of the cluster")
flag.Var(flagtypes.NewURLsValue("http://localhost:2379,http://localhost:4001"), "advertise-client-urls", "List of this member's client URLs to advertise to the rest of the cluster")
flag.Var(flagtypes.NewURLsValue("http://localhost:2380,http://localhost:7001"), "listen-peer-urls", "List of this URLs to listen on for peer traffic")
flag.Var(flagtypes.NewURLsValue("http://localhost:2379,http://localhost:4001"), "listen-client-urls", "List of this URLs to listen on for client traffic")
flag.Var(cors, "cors", "Comma-separated white list of origins for CORS (cross-origin resource sharing).")
flag.Var(proxyFlag, "proxy", fmt.Sprintf("Valid values include %s", strings.Join(flagtypes.ProxyValues, ", ")))
proxyFlag.Set(flagtypes.ProxyValueOff)
flag.StringVar(&clientTLSInfo.CAFile, "ca-file", "", "Path to the client server TLS CA file.")
flag.StringVar(&clientTLSInfo.CertFile, "cert-file", "", "Path to the client server TLS cert file.")
flag.StringVar(&clientTLSInfo.KeyFile, "key-file", "", "Path to the client server TLS key file.")
flag.StringVar(&peerTLSInfo.CAFile, "peer-ca-file", "", "Path to the peer server TLS CA file.")
flag.StringVar(&peerTLSInfo.CertFile, "peer-cert-file", "", "Path to the peer server TLS cert file.")
flag.StringVar(&peerTLSInfo.KeyFile, "peer-key-file", "", "Path to the peer server TLS key file.")
// backwards-compatibility with v0.4.6
flag.Var(&flagtypes.IPAddressPort{}, "addr", "DEPRECATED: Use -advertise-client-urls instead.")
flag.Var(&flagtypes.IPAddressPort{}, "bind-addr", "DEPRECATED: Use -listen-client-urls instead.")
flag.Var(&flagtypes.IPAddressPort{}, "peer-addr", "DEPRECATED: Use -advertise-peer-urls instead.")
flag.Var(&flagtypes.IPAddressPort{}, "peer-bind-addr", "DEPRECATED: Use -listen-peer-urls instead.")
for _, f := range deprecated {
flag.Var(&pkg.DeprecatedFlag{f}, f, "")
}
}
func main() {
flag.Usage = pkg.UsageWithIgnoredFlagsFunc(flag.CommandLine, deprecated)
flag.Parse()
if *printVersion {
fmt.Println("etcd version", version)
os.Exit(0)
}
pkg.SetFlagsFromEnv(flag.CommandLine)
if string(*proxyFlag) == flagtypes.ProxyValueOff {
startEtcd()
} else {
startProxy()
}
// Block indefinitely
<-make(chan struct{})
}
// startEtcd launches the etcd server and HTTP handlers for client/server communication.
func startEtcd() {
self := cluster.FindName(*name)
if self == nil {
log.Fatalf("etcd: no member with name=%q exists", *name)
}
if self.ID == raft.None {
log.Fatalf("etcd: cannot use None(%d) as member id", raft.None)
}
if *dir == "" {
*dir = fmt.Sprintf("%v_etcd_data", self.ID)
log.Printf("main: no data-dir provided, using default data-dir ./%s", *dir)
}
if err := os.MkdirAll(*dir, privateDirMode); err != nil {
log.Fatalf("main: cannot create data directory: %v", err)
}
pt, err := transport.NewTransport(peerTLSInfo)
if err != nil {
log.Fatal(err)
}
acurls, err := pkg.URLsFromFlags(flag.CommandLine, "advertise-client-urls", "addr", clientTLSInfo)
if err != nil {
log.Fatal(err.Error())
}
cfg := &etcdserver.ServerConfig{
Name: *name,
ClientURLs: acurls,
DataDir: *dir,
SnapCount: int64(*snapCount),
Cluster: cluster,
Transport: pt,
}
s := etcdserver.NewServer(cfg)
s.Start()
ch := &pkg.CORSHandler{
Handler: etcdhttp.NewClientHandler(s),
Info: cors,
}
ph := etcdhttp.NewPeerHandler(s)
lpurls, err := pkg.URLsFromFlags(flag.CommandLine, "listen-peer-urls", "peer-bind-addr", peerTLSInfo)
if err != nil {
log.Fatal(err.Error())
}
for _, u := range lpurls {
l, err := transport.NewListener(u.Host, peerTLSInfo)
if err != nil {
log.Fatal(err)
}
// Start the peer server in a goroutine
urlStr := u.String()
go func() {
log.Print("Listening for peers on ", urlStr)
log.Fatal(http.Serve(l, ph))
}()
}
lcurls, err := pkg.URLsFromFlags(flag.CommandLine, "listen-client-urls", "bind-addr", clientTLSInfo)
if err != nil {
log.Fatal(err.Error())
}
// Start a client server goroutine for each listen address
for _, u := range lcurls {
l, err := transport.NewListener(u.Host, clientTLSInfo)
if err != nil {
log.Fatal(err)
}
urlStr := u.String()
go func() {
log.Print("Listening for client requests on ", urlStr)
log.Fatal(http.Serve(l, ch))
}()
}
}
// startProxy launches an HTTP proxy for client communication which proxies to other etcd nodes.
func startProxy() {
pt, err := transport.NewTransport(clientTLSInfo)
if err != nil {
log.Fatal(err)
}
ph, err := proxy.NewHandler(pt, (*cluster).PeerURLs())
if err != nil {
log.Fatal(err)
}
ph = &pkg.CORSHandler{
Handler: ph,
Info: cors,
}
if string(*proxyFlag) == flagtypes.ProxyValueReadonly {
ph = proxy.NewReadonlyHandler(ph)
}
lcurls, err := pkg.URLsFromFlags(flag.CommandLine, "listen-client-urls", "bind-addr", clientTLSInfo)
if err != nil {
log.Fatal(err.Error())
}
// Start a proxy server goroutine for each listen address
for _, u := range lcurls {
l, err := transport.NewListener(u.Host, clientTLSInfo)
if err != nil {
log.Fatal(err)
}
host := u.Host
go func() {
log.Print("Listening for client requests on ", host)
log.Fatal(http.Serve(l, ph))
}()
}
}