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
}
// 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")
}