Golang NewCluster Examples

Example #1

File: cluster_test.go Project: QuentinPerez/etcd

func TestMemberRemove(t *testing.T) {
	defer testutil.AfterTest(t)

	clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 3})
	defer clus.Terminate(t)

	capi := clientv3.NewCluster(clus.Client(1))
	resp, err := capi.MemberList(context.Background())
	if err != nil {
		t.Fatalf("failed to list member %v", err)
	}

	_, err = capi.MemberRemove(context.Background(), resp.Members[0].ID)
	if err != nil {
		t.Fatalf("failed to remove member %v", err)
	}

	resp, err = capi.MemberList(context.Background())
	if err != nil {
		t.Fatalf("failed to list member %v", err)
	}

	if len(resp.Members) != 2 {
		t.Errorf("number of members = %d, want %d", len(resp.Members), 2)
	}
}

Example #2

File: cluster_test.go Project: XiangrongFan/etcd

func TestMemberUpdate(t *testing.T) {
	defer testutil.AfterTest(t)

	clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 3})
	defer clus.Terminate(t)

	capi := clientv3.NewCluster(clus.RandClient())
	resp, err := capi.MemberList(context.Background())
	if err != nil {
		t.Fatalf("failed to list member %v", err)
	}

	urls := []string{"http://127.0.0.1:1234"}
	_, err = capi.MemberUpdate(context.Background(), resp.Members[0].ID, urls)
	if err != nil {
		t.Fatalf("failed to update member %v", err)
	}

	resp, err = capi.MemberList(context.Background())
	if err != nil {
		t.Fatalf("failed to list member %v", err)
	}

	if !reflect.DeepEqual(resp.Members[0].PeerURLs, urls) {
		t.Errorf("urls = %v, want %v", urls, resp.Members[0].PeerURLs)
	}
}

Example #3

File: example_cluster_test.go Project: vsayer/etcd

func ExampleCluster_memberLeader() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   endpoints,
		DialTimeout: dialTimeout,
	})
	if err != nil {
		log.Fatal(err)
	}
	defer cli.Close()

	capi := clientv3.NewCluster(cli)

	resp, err := capi.MemberLeader(context.Background())
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("leader:", resp.Name)
	// leader: infra1
}

Example #4

File: example_cluster_test.go Project: vsayer/etcd

func ExampleCluster_memberList() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   endpoints,
		DialTimeout: dialTimeout,
	})
	if err != nil {
		log.Fatal(err)
	}
	defer cli.Close()

	capi := clientv3.NewCluster(cli)

	resp, err := capi.MemberList(context.Background())
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("members:", len(resp.Members))
	// members: 3
}

Example #5

File: example_cluster_test.go Project: vsayer/etcd

func ExampleCluster_memberAdd() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   endpoints[:2],
		DialTimeout: dialTimeout,
	})
	if err != nil {
		log.Fatal(err)
	}
	defer cli.Close()

	capi := clientv3.NewCluster(cli)

	peerURLs := endpoints[2:]
	mresp, err := capi.MemberAdd(context.Background(), peerURLs)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("added member.PeerURLs:", mresp.Member.PeerURLs)
	// added member.PeerURLs: [http://localhost:32380]
}

Example #6

File: example_cluster_test.go Project: vsayer/etcd

func ExampleCluster_memberRemove() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   endpoints[1:],
		DialTimeout: dialTimeout,
	})
	if err != nil {
		log.Fatal(err)
	}
	defer cli.Close()

	capi := clientv3.NewCluster(cli)

	resp, err := capi.MemberList(context.Background())
	if err != nil {
		log.Fatal(err)
	}

	_, err = capi.MemberRemove(context.Background(), resp.Members[0].ID)
	if err != nil {
		log.Fatal(err)
	}
}

Example #7

File: example_cluster_test.go Project: vsayer/etcd

func ExampleCluster_memberUpdate() {
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   endpoints,
		DialTimeout: dialTimeout,
	})
	if err != nil {
		log.Fatal(err)
	}
	defer cli.Close()

	capi := clientv3.NewCluster(cli)

	resp, err := capi.MemberList(context.Background())
	if err != nil {
		log.Fatal(err)
	}

	peerURLs := []string{"http://localhost:12378"}
	_, err = capi.MemberUpdate(context.Background(), resp.Members[0].ID, peerURLs)
	if err != nil {
		log.Fatal(err)
	}
}

Example #8

File: cluster_test.go Project: XiangrongFan/etcd

func TestMemberRemove(t *testing.T) {
	defer testutil.AfterTest(t)

	clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 3})
	defer clus.Terminate(t)

	capi := clientv3.NewCluster(clus.Client(1))
	resp, err := capi.MemberList(context.Background())
	if err != nil {
		t.Fatalf("failed to list member %v", err)
	}

	rmvID := resp.Members[0].ID
	// indexes in capi member list don't necessarily match cluster member list;
	// find member that is not the client to remove
	for _, m := range resp.Members {
		mURLs, _ := types.NewURLs(m.PeerURLs)
		if !reflect.DeepEqual(mURLs, clus.Members[1].ServerConfig.PeerURLs) {
			rmvID = m.ID
			break
		}
	}

	_, err = capi.MemberRemove(context.Background(), rmvID)
	if err != nil {
		t.Fatalf("failed to remove member %v", err)
	}

	resp, err = capi.MemberList(context.Background())
	if err != nil {
		t.Fatalf("failed to list member %v", err)
	}

	if len(resp.Members) != 2 {
		t.Errorf("number of members = %d, want %d", len(resp.Members), 2)
	}
}

Example #9

File: cluster.go Project: lrita/etcd

// GetLeader returns the index of leader and error if any.
func (c *cluster) GetLeader() (int, error) {
	if c.v2Only {
		return 0, nil
	}
	cli, err := clientv3.New(clientv3.Config{
		Endpoints:   c.GRPCURLs,
		DialTimeout: 5 * time.Second,
	})
	if err != nil {
		return 0, err
	}
	defer cli.Close()
	clus := clientv3.NewCluster(cli)
	mem, err := clus.MemberLeader(context.Background())
	if err != nil {
		return 0, err
	}
	for i, name := range c.Names {
		if name == mem.Name {
			return i, nil
		}
	}
	return 0, fmt.Errorf("no leader found")
}