Golang Client.SetConsistency方法代碼示例

func NewEtcd(prefixKey string, config *EtcdConfig) (*Etcd, error) {
	var (
		client *etcd.Client
		err    error
	)

	if config.CertFile != "" && config.KeyFile != "" {
		if client, err = etcd.NewTLSClient(config.Machines, config.CertFile, config.KeyFile, config.CaFile); err != nil {
			Logger.Error("Failed to connect to Etcd. Error: %+v.", err)
			return nil, err
		}
	} else {
		client = etcd.NewClient(config.Machines)
	}

	// Set the default value if not provided.
	if config.EtcdConsistency == "" {
		config.EtcdConsistency = etcd.STRONG_CONSISTENCY
	}

	if err = client.SetConsistency(config.EtcdConsistency); err != nil {
		Logger.Error("Failed to set Etcd consitency. Error: %+v.", err)
		return nil, err
	}

	return &Etcd{client: client, prefixKey: prefixKey}, nil
}

func newAdapter(client *etcd.Client, workPool *workpool.WorkPool) *ETCDStoreAdapter {
	client.SetConsistency(etcd.STRONG_CONSISTENCY)

	return &ETCDStoreAdapter{
		client:            client,
		workPool:          workPool,
		inflightWatches:   map[chan bool]bool{},
		inflightWatchLock: &sync.Mutex{},
	}
}

func (n *ng) reconnect() error {
	n.Close()
	var client *etcd.Client
	if n.options.EtcdCertFile == "" && n.options.EtcdKeyFile == "" {
		client = etcd.NewClient(n.nodes)
	} else {
		var err error
		if client, err = etcd.NewTLSClient(n.nodes, n.options.EtcdCertFile, n.options.EtcdKeyFile, n.options.EtcdCaFile); err != nil {
			return err
		}
	}
	if err := client.SetConsistency(n.options.EtcdConsistency); err != nil {
		return err
	}
	n.client = client
	return nil
}

// getCommandFunc executes the "get" command.
func getCommandFunc(cmd *cobra.Command, args []string, client *etcd.Client) (*etcd.Response, error) {
	if len(args) == 0 {
		return nil, errors.New("Key required")
	}
	key := args[0]
	consistent := getConsistentFlag
	sorted := getSortFlag

	// Setup consistency on the client.
	if consistent {
		client.SetConsistency(etcd.STRONG_CONSISTENCY)
	} else {
		client.SetConsistency(etcd.WEAK_CONSISTENCY)
	}

	// Retrieve the value from the server.
	return client.Get(key, sorted, false)
}

func initializeEtcdStoreClient(logger lager.Logger, etcdOptions *etcddb.ETCDOptions) etcddb.StoreClient {
	var etcdClient *etcdclient.Client
	var tr *http.Transport

	if etcdOptions.IsSSL {
		if etcdOptions.CertFile == "" || etcdOptions.KeyFile == "" {
			logger.Fatal("failed-to-construct-etcd-tls-client", errors.New("Require both cert and key path"))
		}

		var err error
		etcdClient, err = etcdclient.NewTLSClient(etcdOptions.ClusterUrls, etcdOptions.CertFile, etcdOptions.KeyFile, etcdOptions.CAFile)
		if err != nil {
			logger.Fatal("failed-to-construct-etcd-tls-client", err)
		}

		tlsCert, err := tls.LoadX509KeyPair(etcdOptions.CertFile, etcdOptions.KeyFile)
		if err != nil {
			logger.Fatal("failed-to-construct-etcd-tls-client", err)
		}

		tlsConfig := &tls.Config{
			Certificates:       []tls.Certificate{tlsCert},
			InsecureSkipVerify: true,
			ClientSessionCache: tls.NewLRUClientSessionCache(etcdOptions.ClientSessionCacheSize),
		}
		tr = &http.Transport{
			TLSClientConfig:     tlsConfig,
			Dial:                etcdClient.DefaultDial,
			MaxIdleConnsPerHost: etcdOptions.MaxIdleConnsPerHost,
		}
		etcdClient.SetTransport(tr)
		etcdClient.AddRootCA(etcdOptions.CAFile)
	} else {
		etcdClient = etcdclient.NewClient(etcdOptions.ClusterUrls)
	}
	etcdClient.SetConsistency(etcdclient.STRONG_CONSISTENCY)

	return etcddb.NewStoreClient(etcdClient)
}

func initializeEtcdClient(etcdOptions *ETCDOptions) *etcd.Client {
	var etcdClient *etcd.Client
	var tr *http.Transport

	if etcdOptions.IsSSL {
		if etcdOptions.CertFile == "" || etcdOptions.KeyFile == "" {
			panic(errors.New("Require both cert and key path"))
		}

		var err error
		etcdClient, err = etcd.NewTLSClient(etcdOptions.ClusterUrls, etcdOptions.CertFile, etcdOptions.KeyFile, etcdOptions.CAFile)
		if err != nil {
			panic(err)
		}

		tlsCert, err := tls.LoadX509KeyPair(etcdOptions.CertFile, etcdOptions.KeyFile)
		if err != nil {
			panic(err)
		}

		tlsConfig := &tls.Config{
			Certificates:       []tls.Certificate{tlsCert},
			InsecureSkipVerify: true,
			ClientSessionCache: tls.NewLRUClientSessionCache(etcdOptions.ClientSessionCacheSize),
		}
		tr = &http.Transport{
			TLSClientConfig:     tlsConfig,
			Dial:                etcdClient.DefaultDial,
			MaxIdleConnsPerHost: etcdOptions.MaxIdleConnsPerHost,
		}
		etcdClient.SetTransport(tr)
	} else {
		etcdClient = etcd.NewClient(etcdOptions.ClusterUrls)
	}
	etcdClient.SetConsistency(etcd.STRONG_CONSISTENCY)

	return etcdClient
}

	Expect(rawSQLDB.Ping()).NotTo(HaveOccurred())

	flavor = sqlRunner.DriverName()

	encryptionKey, err := encryption.NewKey("label", "passphrase")
	Expect(err).NotTo(HaveOccurred())
	keyManager, err := encryption.NewKeyManager(encryptionKey, nil)
	Expect(err).NotTo(HaveOccurred())
	cryptor = encryption.NewCryptor(keyManager, rand.Reader)

	fakeClock = fakeclock.NewFakeClock(time.Now())
})

var _ = AfterSuite(func() {
	etcdRunner.Stop()

	Expect(rawSQLDB.Close()).NotTo(HaveOccurred())
	ginkgomon.Kill(sqlProcess, 5*time.Second)
})

var _ = BeforeEach(func() {
	etcdRunner.Reset()

	etcdClient = etcdRunner.Client()
	etcdClient.SetConsistency(etcdclient.STRONG_CONSISTENCY)

	storeClient = etcd.NewStoreClient(etcdClient)

	sqlRunner.Reset()
})

func main() {

	var (
		nodes string

		taskList string
		tasks    []string

		confPath string
		confData *lib.RunConfig

		cliVars string
		cliData map[string]interface{}

		verbose bool
		taskDir string
		tmplDir string

		etcdClient *etcd.Client

		base *cobra.Command

		err error
	)

	base = &cobra.Command{
		Use:   "atom",
		Short: "atom",
		Long:  "atom",
		Run: func(cmd *cobra.Command, args []string) {

			confData, err = lib.ParseAtomConfig(confPath)
			if err != nil {
				log.Printf("Config read error: %s", err)
				if (taskDir == "") || (tmplDir == "") {
					return
				} else {
					confData = &lib.RunConfig{
						TaskDir: taskDir,
						TmplDir: tmplDir,
						Verbose: verbose,
					}
				}
			}

			if err := yaml.Unmarshal([]byte(cliVars), &cliData); err != nil {
				log.Printf("Error: %s", err)
			}

			if nodes == "" {
				etcdClient = nil
			} else {
				etcdClient = etcd.NewClient([]string{nodes})
				etcdClient.SetDialTimeout(time.Duration(3) * time.Second)
				if !etcdClient.SyncCluster() {
					log.Fatal("Couldn't sync with etcd cluster.")
				}
				etcdClient.SetConsistency(etcd.STRONG_CONSISTENCY)
			}

			for _, name := range strings.Split(taskList, ",") {
				if name == "" {
					continue
				}
				tasks = append(tasks, name)
			}

			if len(tasks) <= 0 {
				tasks = nil
			}

			atom := lib.NewAtom(confData, &cliData, etcdClient)
			atom.Run(tasks...)

		},
	}

	base.Flags().StringVarP(&taskList, "run", "r", "", "tasks to run")

	base.PersistentFlags().StringVarP(&cliVars, "data", "d", "", "cli data (string, yaml)")
	base.PersistentFlags().StringVarP(&confPath, "conf", "c", "/etc/atom/atom.yml", "atom.yml")
	base.PersistentFlags().StringVarP(&nodes, "nodes", "n", "", "etcd nodes")
	base.PersistentFlags().StringVarP(&taskDir, "task", "t", "", "task directory")
	base.PersistentFlags().StringVarP(&tmplDir, "template", "m", "", "template directory")
	base.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose")

	base.Execute()
}

// execWatchCommandFunc executes the "exec-watch" command.
func execWatchCommandFunc(cmd *cobra.Command, args []string, client *etcd.Client) (*etcd.Response, error) {
	// _ = io.Copy
	// _ = exec.Command
	// args := c.Args()
	argsLen := len(args)

	if argsLen < 2 {
		return nil, errors.New("Key and command to exec required")
	}

	// key := args[argsLen-1]
	key := args[0]
	cmdArgs := args[1:]

	index := 0
	if execAfterIndexFlag != 0 {
		index = execAfterIndexFlag + 1

	}

	recursive := execRecursiveFlag

	sigch := make(chan os.Signal, 1)
	signal.Notify(sigch, os.Interrupt)
	stop := make(chan bool)

	go func() {
		<-sigch
		stop <- true
		os.Exit(0)
	}()

	receiver := make(chan *etcd.Response)
	client.SetConsistency(etcd.WEAK_CONSISTENCY)
	go client.Watch(key, uint64(index), recursive, receiver, stop)

	for {
		resp := <-receiver
		cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
		cmd.Env = environResponse(resp, os.Environ())

		stdout, err := cmd.StdoutPipe()
		if err != nil {
			fmt.Fprintf(os.Stderr, err.Error())
			os.Exit(1)
		}
		stderr, err := cmd.StderrPipe()
		if err != nil {
			fmt.Fprintf(os.Stderr, err.Error())
			os.Exit(1)
		}
		err = cmd.Start()
		if err != nil {
			fmt.Fprintf(os.Stderr, err.Error())
			os.Exit(1)
		}
		go io.Copy(os.Stdout, stdout)
		go io.Copy(os.Stderr, stderr)
		cmd.Wait()
	}

	return nil, nil
}

func main() {
	cf_debug_server.AddFlags(flag.CommandLine)
	cf_lager.AddFlags(flag.CommandLine)
	etcdFlags := AddETCDFlags(flag.CommandLine)
	flag.Parse()

	cf_http.Initialize(*communicationTimeout)

	logger, reconfigurableSink := cf_lager.New("bbs")
	logger.Info("starting")

	initializeDropsonde(logger)

	etcdOptions, err := etcdFlags.Validate()
	if err != nil {
		logger.Fatal("etcd-validation-failed", err)
	}

	var etcdClient *etcdclient.Client
	if etcdOptions.IsSSL {
		etcdClient, err = etcdclient.NewTLSClient(etcdOptions.ClusterUrls, etcdOptions.CertFile, etcdOptions.KeyFile, etcdOptions.CAFile)
		if err != nil {
			logger.Fatal("failed-to-construct-etcd-tls-client", err)
		}
	} else {
		etcdClient = etcdclient.NewClient(etcdOptions.ClusterUrls)
	}
	etcdClient.SetConsistency(etcdclient.STRONG_CONSISTENCY)

	err = validateAuctioneerFlag()
	if err != nil {
		logger.Fatal("auctioneer-address-validation-failed", err)
	}
	auctioneerClient := auctionhandlers.NewClient(*auctioneerAddress)
	consulSession := initializeConsul(logger)
	consulDB := consuldb.NewConsul(consulSession)
	cellClient := cellhandlers.NewClient()
	db := etcddb.NewETCD(etcdClient, auctioneerClient, cellClient, consulDB, clock.NewClock())
	hub := events.NewHub()
	watcher := watcher.NewWatcher(
		logger,
		db,
		hub,
		clock.NewClock(),
		bbsWatchRetryWaitDuration,
	)

	handler := handlers.New(logger, db, hub)

	members := grouper.Members{
		{"watcher", watcher},
		{"server", http_server.New(*serverAddress, handler)},
		{"hub-closer", closeHub(logger.Session("hub-closer"), hub)},
	}

	if dbgAddr := cf_debug_server.DebugAddress(flag.CommandLine); dbgAddr != "" {
		members = append(grouper.Members{
			{"debug-server", cf_debug_server.Runner(dbgAddr, reconfigurableSink)},
		}, members...)
	}

	group := grouper.NewOrdered(os.Interrupt, members)

	monitor := ifrit.Invoke(sigmon.New(group))

	logger.Info("started")

	err = <-monitor.Wait()
	if err != nil {
		logger.Error("exited-with-failure", err)
		os.Exit(1)
	}

	logger.Info("exited")
}