Пример #1
0
func ExampleMaintenance_status() {
	for _, ep := range endpoints {
		cli, err := clientv3.New(clientv3.Config{
			Endpoints:   []string{ep},
			DialTimeout: dialTimeout,
		})
		if err != nil {
			log.Fatal(err)
		}
		defer cli.Close()

		// resp, err := cli.Status(context.Background(), ep)
		//
		// or
		//
		mapi := clientv3.NewMaintenance(cli)
		resp, err := mapi.Status(context.Background(), ep)
		if err != nil {
			log.Fatal(err)
		}
		fmt.Printf("endpoint: %s / IsLeader: %v\n", ep, resp.Header.MemberId == resp.Leader)
	}
	// endpoint: localhost:2379 / IsLeader: false
	// endpoint: localhost:22379 / IsLeader: false
	// endpoint: localhost:32379 / IsLeader: true
}
Пример #2
0
// GetLeader returns the index of leader and error if any.
func (c *cluster) GetLeader() (int, error) {
	if c.v2Only {
		return 0, nil
	}

	for i, ep := range c.GRPCURLs {
		cli, err := clientv3.New(clientv3.Config{
			Endpoints:   []string{ep},
			DialTimeout: 5 * time.Second,
		})
		if err != nil {
			return 0, err
		}
		defer cli.Close()

		mapi := clientv3.NewMaintenance(cli)
		resp, err := mapi.Status(context.Background(), ep)
		if err != nil {
			return 0, err
		}
		if resp.Header.MemberId == resp.Leader {
			return i, nil
		}
	}

	return 0, fmt.Errorf("no leader found")
}