golang对etcd存取和数值监测的实现

Go  /  管理员 发布于 7年前   209

测试代码如下

package mainimport (  "fmt"  "log"  "time"  "go.etcd.io/etcd/clientv3"  "golang.org/x/net/context")var (  dialTimeout  = 5 * time.Second  requestTimeout = 2 * time.Second  endpoints   = []string{"192.168.99.106:2379", "192.168.99.107:2379", "192.168.99.108:2379"})func main() {  cli, err := clientv3.New(clientv3.Config{    Endpoints:  endpoints,    DialTimeout: dialTimeout,  })  if err != nil {    log.Fatal(err)  }  defer cli.Close()  key1, value1 := "testkey1", "value"  ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)  _, err = cli.Put(ctx, key1, value1)  cancel()  if err != nil {    log.Println("Put failed. ", err)  } else {    log.Printf("Put {%s:%s} succeed\n", key1, value1)  }  ctx, cancel = context.WithTimeout(context.Background(), requestTimeout)  resp, err := cli.Get(ctx, key1)  cancel()  if err != nil {    log.Println("Get failed. ", err)    return  }  for _, kv := range resp.Kvs {    log.Printf("Get {%s:%s} \n", kv.Key, kv.Value)  }  done := make(chan bool)  go func() {    wch := cli.Watch(context.Background(), key1)    for item := range wch {      for _, ev := range item.Events {        log.Printf("Type:%s, key:%s, value:%s\n", ev.Type, ev.Kv.Key, ev.Kv.Value)      }    }  }()  go func() {    for cnt := 0; cnt < 11; cnt++ {      value := fmt.Sprintf("%s%d", "value", cnt)      _, err = cli.Put(context.Background(), key1, value)      if err != nil {        log.Println("Put failed. ", err)      } else {        log.Printf("Put {%s:%s} succeed\n", key1, value)      }    }  }()  <-done  log.Println("Done!")}

测试结果如下

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