Golang Client.SetCluster方法代碼示例

func NewEtcdClient(addr string, dialTimeout time.Duration) (*EtcdClient, error) {
	var c *api.Client
	/*
		var err error
		if cert != "" && key != "" {
			c, err = etcd.NewTLSClient(machines, cert, key, caCert)
			if err != nil {
				return &Client{c}, err
			}
		} else {
			c = etcd.NewClient(machines)
		}
	*/

	// machine addresses
	machines := []string{addr}

	// create custom client
	c = api.NewClient(machines)
	if !c.SetCluster(machines) {
		return nil, errors.New("cannot connect to etcd cluster: " + addr)
	}

	// configure dial timeout
	c.SetDialTimeout(dialTimeout)

	return &EtcdClient{addr: addr, client: c}, nil
}

// NewEtcdClient returns an *etcd.Client with a connection to named machines.
// It returns an error if a connection to the cluster cannot be made.
func NewEtcdClient(machines []string, cert, key string, caCert string) (*Client, error) {
	var c *goetcd.Client
	var err error
	if cert != "" && key != "" {
		c, err = goetcd.NewTLSClient(machines, cert, key, caCert)
		if err != nil {
			return &Client{c}, err
		}
	} else {
		c = goetcd.NewClient(machines)
	}
	// Configure the DialTimeout, since 1 second is often too short
	c.SetDialTimeout(time.Duration(3) * time.Second)

	maxConnectAttempts := 10
	for attempt := 1; attempt <= maxConnectAttempts; attempt++ {
		success := c.SetCluster(machines)
		if success {
			break
			return &Client{c}, nil
		}

		if attempt == maxConnectAttempts {
			break
			return &Client{c}, errors.New("cannot connect to etcd cluster: " + strings.Join(machines, ","))
		}
		log.Info(fmt.Sprintf("[Attempt: %d] Attempting access to etcd after 5 second sleep", attempt))
		time.Sleep(5 * time.Second)
	}

	return &Client{c}, nil
}

// NewEtcdClient returns an *etcd.Client with a connection to named machines.
// It returns an error if a connection to the cluster cannot be made.
func NewEtcdClient(machines []string, cert, key string, caCert string) (*Client, error) {
	var c *etcd.Client
	if cert != "" && key != "" {
		c, err := etcd.NewTLSClient(machines, cert, key, caCert)
		if err != nil {
			return &Client{c}, err
		}
	} else {
		c = etcd.NewClient(machines)
	}
	success := c.SetCluster(machines)
	if !success {
		return &Client{c}, errors.New("cannot connect to etcd cluster: " + strings.Join(machines, ","))
	}
	return &Client{c}, nil
}

func (etcd *ETCDClusterRunner) detectRunningEtcd(index int) bool {
	var client *etcdclient.Client

	if etcd.serverSSL == nil {
		client = etcdclient.NewClient([]string{})
	} else {
		var err error
		client, err = etcdstoreadapter.NewETCDTLSClient(
			[]string{etcd.clientURL(index)},
			etcd.serverSSL.CertFile,
			etcd.serverSSL.KeyFile,
			etcd.serverSSL.CAFile,
		)
		Expect(err).NotTo(HaveOccurred())
	}
	return client.SetCluster([]string{etcd.clientURL(index)})
}

// NewClient returns an *etcd.Client with a connection to the named machines.
// It will return an error if a connection to the cluster cannot be made.
// The parameter machines needs to be a full URL with schemas.
// e.g. "http://localhost:4001" will work, but "localhost:4001" will not.
func NewClient(machines []string, cert, key, caCert string) (Client, error) {
	var c *etcd.Client
	var err error

	if cert != "" && key != "" {
		c, err = etcd.NewTLSClient(machines, cert, key, caCert)
		if err != nil {
			return nil, err
		}
	} else {
		c = etcd.NewClient(machines)
	}
	success := c.SetCluster(machines)
	if !success {
		return nil, fmt.Errorf("cannot connect to the etcd cluster: %s", strings.Join(machines, ","))
	}
	return &client{c}, nil
}

// NewEtcdClient returns an *etcd.Client with a connection to named machines.
// It returns an error if a connection to the cluster cannot be made.
func NewEtcdClient(machines []string, cert, key string, caCert string) (*Client, error) {
	var c *etcd.Client
	if cert != "" && key != "" {
		c, err := etcd.NewTLSClient(machines, cert, key, caCert)
		if err != nil {
			return &Client{c}, err
		}
	} else {
		c = etcd.NewClient(machines)
	}
	// Configure the DialTimeout, since 1 second is often too short
	c.SetDialTimeout(time.Duration(3) * time.Second)
	success := c.SetCluster(machines)
	if !success {
		return &Client{c}, errors.New("cannot connect to etcd cluster: " + strings.Join(machines, ","))
	}
	return &Client{c}, nil
}

// NewEtcdClient returns an *etcd.Client with a connection to named machines.
// It returns an error if a connection to the cluster cannot be made.
//func NewEtcdClient(machines []string, cert, key string, caCert string) (*Client, error) {
func NewEtcdClient(machines []string, cert, key string, caCert string, basicAuth bool, username string, password string) (*Client, error) {
	var c *goetcd.Client
	var err error
	if cert != "" && key != "" {
		c, err = goetcd.NewTLSClient(machines, cert, key, caCert)
		if err != nil {
			return &Client{c}, err
		}
	} else {
		c = goetcd.NewClient(machines)
	}
	if basicAuth {
		c.SetCredentials(username, password)
	}
	// Configure the DialTimeout, since 1 second is often too short
	c.SetDialTimeout(time.Duration(3) * time.Second)
	success := c.SetCluster(machines)
	if !success {
		return &Client{c}, errors.New("cannot connect to etcd cluster: " + strings.Join(machines, ","))
	}
	return &Client{c}, nil
}

// NewEtcdClient returns an *etcd.Client with a connection to named machines.
// It returns an error if a connection to the cluster cannot be made.
func NewEtcdClient(machines []string, cert, key string, caCert string, noDiscover bool) (*Client, error) {
	var c *goetcd.Client
	var err error
	machines = prependSchemeToMachines(machines)
	if cert != "" && key != "" {
		c, err = goetcd.NewTLSClient(machines, cert, key, caCert)
		if err != nil {
			return &Client{c}, err
		}
	} else {
		c = goetcd.NewClient(machines)
	}
	// Configure the DialTimeout, since 1 second is often too short
	c.SetDialTimeout(time.Duration(3) * time.Second)

	// If noDiscover is not set, we should locate the whole etcd cluster.
	if !noDiscover {
		success := c.SetCluster(machines)
		if !success {
			return &Client{c}, errors.New("cannot connect to etcd cluster: " + strings.Join(machines, ","))
		}
	}
	return &Client{c}, nil
}