Golang clientv3.WithLease函数代码示例

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本文整理汇总了Golang中github.com/coreos/etcd/clientv3.WithLease函数的典型用法代码示例。如果您正苦于以下问题：Golang WithLease函数的具体用法？Golang WithLease怎么用？Golang WithLease使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了WithLease函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: ExampleLease_keepAliveOnce

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

	resp, err := cli.Grant(context.TODO(), 5)
	if err != nil {
		log.Fatal(err)
	}

	_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(resp.ID))
	if err != nil {
		log.Fatal(err)
	}

	// to renew the lease only once
	ka, kaerr := cli.KeepAliveOnce(context.TODO(), resp.ID)
	if kaerr != nil {
		log.Fatal(kaerr)
	}

	fmt.Println("ttl:", ka.TTL)
	// Output: ttl: 5
}

开发者ID:XiangrongFan，项目名称:etcd，代码行数:29，代码来源:example_lease_test.go

示例2: ExampleLease_keepAliveOnce

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

	resp, err := cli.Grant(context.TODO(), 5)
	if err != nil {
		log.Fatal(err)
	}

	_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
	if err != nil {
		log.Fatal(err)
	}

	// to renew the lease only once
	_, err = cli.KeepAliveOnce(context.TODO(), clientv3.LeaseID(resp.ID))
	if err != nil {
		log.Fatal(err)
	}
}

开发者ID:ZenoRewn，项目名称:origin，代码行数:26，代码来源:example_lease_test.go

示例3: getPutOp

func getPutOp(cmd *cobra.Command, args []string) (string, string, []clientv3.OpOption) {
	if len(args) == 0 {
		ExitWithError(ExitBadArgs, fmt.Errorf("put command needs 1 argument and input from stdin or 2 arguments."))
	}

	key := args[0]
	value, err := argOrStdin(args, os.Stdin, 1)
	if err != nil {
		ExitWithError(ExitBadArgs, fmt.Errorf("put command needs 1 argument and input from stdin or 2 arguments."))
	}

	id, err := strconv.ParseInt(leaseStr, 16, 64)
	if err != nil {
		ExitWithError(ExitBadArgs, fmt.Errorf("bad lease ID (%v), expecting ID in Hex", err))
	}

	opts := []clientv3.OpOption{}
	if id != 0 {
		opts = append(opts, clientv3.WithLease(clientv3.LeaseID(id)))
	}
	if putPrevKV {
		opts = append(opts, clientv3.WithPrevKV())
	}

	return key, value, opts
}

开发者ID:CliffYuan，项目名称:etcd，代码行数:26，代码来源:put_command.go

示例4: ExampleLease_create

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

	kvc := clientv3.NewKV(cli)
	lapi := clientv3.NewLease(cli)
	defer lapi.Close()

	// minimum lease TTL is 5-second
	resp, err := lapi.Create(context.TODO(), 5)
	if err != nil {
		log.Fatal(err)
	}

	// after 5 seconds, the key 'foo' will be removed
	_, err = kvc.Put(context.TODO(), "foo", "bar", clientv3.WithLease(lease.LeaseID(resp.ID)))
	if err != nil {
		log.Fatal(err)
	}
}

开发者ID:vsayer，项目名称:etcd，代码行数:26，代码来源:example_lease_test.go

示例5: ExampleLease_revoke

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

	resp, err := cli.Create(context.TODO(), 5)
	if err != nil {
		log.Fatal(err)
	}

	_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
	if err != nil {
		log.Fatal(err)
	}

	// revoking lease expires the key attached to its lease ID
	_, err = cli.Revoke(context.TODO(), clientv3.LeaseID(resp.ID))
	if err != nil {
		log.Fatal(err)
	}

	gresp, err := cli.Get(context.TODO(), "foo")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("number of keys:", len(gresp.Kvs))
	// number of keys: 0
}

开发者ID:siddontang，项目名称:etcd，代码行数:33，代码来源:example_lease_test.go

示例6: ExampleLease_keepAlive

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

	resp, err := cli.Create(context.TODO(), 5)
	if err != nil {
		log.Fatal(err)
	}

	_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(resp.ID)))
	if err != nil {
		log.Fatal(err)
	}

	// the key 'foo' will be kept forever
	_, err = cli.KeepAlive(context.TODO(), clientv3.LeaseID(resp.ID))
	if err != nil {
		log.Fatal(err)
	}
}

开发者ID:siddontang，项目名称:etcd，代码行数:26，代码来源:example_lease_test.go

示例7: TestLeaseRevoke

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

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

	lapi := clientv3.NewLease(clus.RandClient())
	defer lapi.Close()

	kv := clientv3.NewKV(clus.RandClient())

	resp, err := lapi.Create(context.Background(), 10)
	if err != nil {
		t.Errorf("failed to create lease %v", err)
	}

	_, err = lapi.Revoke(context.Background(), lease.LeaseID(resp.ID))
	if err != nil {
		t.Errorf("failed to revoke lease %v", err)
	}

	_, err = kv.Put(context.TODO(), "foo", "bar", clientv3.WithLease(lease.LeaseID(resp.ID)))
	if err != v3rpc.ErrLeaseNotFound {
		t.Fatalf("err = %v, want %v", err, v3rpc.ErrLeaseNotFound)
	}
}

开发者ID:lrita，项目名称:etcd，代码行数:26，代码来源:lease_test.go

示例8: ExampleLease_keepAlive

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

	resp, err := cli.Grant(context.TODO(), 5)
	if err != nil {
		log.Fatal(err)
	}

	_, err = cli.Put(context.TODO(), "foo", "bar", clientv3.WithLease(resp.ID))
	if err != nil {
		log.Fatal(err)
	}

	// the key 'foo' will be kept forever
	ch, kaerr := cli.KeepAlive(context.TODO(), resp.ID)
	if kaerr != nil {
		log.Fatal(kaerr)
	}

	ka := <-ch
	fmt.Println("ttl:", ka.TTL)
	// Output: ttl: 5
}

开发者ID:XiangrongFan，项目名称:etcd，代码行数:30，代码来源:example_lease_test.go

示例9: Lock

// Lock locks the mutex with a cancellable context. If the context is cancelled
// while trying to acquire the lock, the mutex tries to clean its stale lock entry.
func (m *Mutex) Lock(ctx context.Context) error {
	s, serr := NewSession(m.client)
	if serr != nil {
		return serr
	}

	m.myKey = fmt.Sprintf("%s/%x", m.pfx, s.Lease())
	cmp := v3.Compare(v3.CreateRevision(m.myKey), "=", 0)
	// put self in lock waiters via myKey; oldest waiter holds lock
	put := v3.OpPut(m.myKey, "", v3.WithLease(s.Lease()))
	// reuse key in case this session already holds the lock
	get := v3.OpGet(m.myKey)
	resp, err := m.client.Txn(ctx).If(cmp).Then(put).Else(get).Commit()
	if err != nil {
		return err
	}
	m.myRev = resp.Header.Revision
	if !resp.Succeeded {
		m.myRev = resp.Responses[0].GetResponseRange().Kvs[0].CreateRevision
	}

	// wait for deletion revisions prior to myKey
	err = waitDeletes(ctx, m.client, m.pfx, v3.WithPrefix(), v3.WithRev(m.myRev-1))
	// release lock key if cancelled
	select {
	case <-ctx.Done():
		m.Unlock()
	default:
	}
	return err
}

开发者ID:achanda，项目名称:etcd，代码行数:33，代码来源:mutex.go

示例10: ttlOpts

// ttlOpts returns client options based on given ttl.
// ttl: if ttl is non-zero, it will attach the key to a lease with ttl of roughly the same length
func (s *store) ttlOpts(ctx context.Context, ttl int64) ([]clientv3.OpOption, error) {
	if ttl == 0 {
		return nil, nil
	}
	// TODO: one lease per ttl key is expensive. Based on current use case, we can have a long window to
	// put keys within into same lease. We shall benchmark this and optimize the performance.
	lcr, err := s.client.Lease.Grant(ctx, ttl)
	if err != nil {
		return nil, err
	}
	return []clientv3.OpOption{clientv3.WithLease(clientv3.LeaseID(lcr.ID))}, nil
}

开发者ID:maisem，项目名称:kubernetes，代码行数:14，代码来源:store.go

示例11: putNewKV

// putNewKV attempts to create the given key, only succeeding if the key did
// not yet exist.
func putNewKV(kv v3.KV, key, val string, leaseID v3.LeaseID) (int64, error) {
	cmp := v3.Compare(v3.Version(key), "=", 0)
	req := v3.OpPut(key, val, v3.WithLease(leaseID))
	txnresp, err := kv.Txn(context.TODO()).If(cmp).Then(req).Commit()
	if err != nil {
		return 0, err
	}
	if !txnresp.Succeeded {
		return 0, ErrKeyExists
	}
	return txnresp.Header.Revision, nil
}

开发者ID:luxas，项目名称:flannel，代码行数:14，代码来源:key.go

示例12: newSequentialKV

// newSequentialKV allocates a new sequential key <prefix>/nnnnn with a given
// value and lease.  Note: a bookkeeping node __<prefix> is also allocated.
func newSequentialKV(kv v3.KV, prefix, val string, leaseID v3.LeaseID) (*RemoteKV, error) {
	resp, err := kv.Get(context.TODO(), prefix, v3.WithLastKey()...)
	if err != nil {
		return nil, err
	}

	// add 1 to last key, if any
	newSeqNum := 0
	if len(resp.Kvs) != 0 {
		fields := strings.Split(string(resp.Kvs[0].Key), "/")
		_, serr := fmt.Sscanf(fields[len(fields)-1], "%d", &newSeqNum)
		if serr != nil {
			return nil, serr
		}
		newSeqNum++
	}
	newKey := fmt.Sprintf("%s/%016d", prefix, newSeqNum)

	// base prefix key must be current (i.e., <=) with the server update;
	// the base key is important to avoid the following:
	// N1: LastKey() == 1, start txn.
	// N2: New Key 2, New Key 3, Delete Key 2
	// N1: txn succeeds allocating key 2 when it shouldn't
	baseKey := "__" + prefix

	// current revision might contain modification so +1
	cmp := v3.Compare(v3.ModRevision(baseKey), "<", resp.Header.Revision+1)
	reqPrefix := v3.OpPut(baseKey, "", v3.WithLease(leaseID))
	reqNewKey := v3.OpPut(newKey, val, v3.WithLease(leaseID))

	txn := kv.Txn(context.TODO())
	txnresp, err := txn.If(cmp).Then(reqPrefix, reqNewKey).Commit()
	if err != nil {
		return nil, err
	}
	if !txnresp.Succeeded {
		return newSequentialKV(kv, prefix, val, leaseID)
	}
	return &RemoteKV{kv, newKey, txnresp.Header.Revision, val}, nil
}

开发者ID:luxas，项目名称:flannel，代码行数:42，代码来源:key.go

示例13: TestLeaseTimeToLive

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

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

	lapi := clientv3.NewLease(clus.RandClient())
	defer lapi.Close()

	resp, err := lapi.Grant(context.Background(), 10)
	if err != nil {
		t.Errorf("failed to create lease %v", err)
	}

	kv := clientv3.NewKV(clus.RandClient())
	keys := []string{"foo1", "foo2"}
	for i := range keys {
		if _, err = kv.Put(context.TODO(), keys[i], "bar", clientv3.WithLease(resp.ID)); err != nil {
			t.Fatal(err)
		}
	}

	lresp, lerr := lapi.TimeToLive(context.Background(), resp.ID, clientv3.WithAttachedKeys())
	if lerr != nil {
		t.Fatal(lerr)
	}
	if lresp.ID != resp.ID {
		t.Fatalf("leaseID expected %d, got %d", resp.ID, lresp.ID)
	}
	if lresp.GrantedTTL != int64(10) {
		t.Fatalf("GrantedTTL expected %d, got %d", 10, lresp.GrantedTTL)
	}
	if lresp.TTL == 0 || lresp.TTL > lresp.GrantedTTL {
		t.Fatalf("unexpected TTL %d (granted %d)", lresp.TTL, lresp.GrantedTTL)
	}
	ks := make([]string, len(lresp.Keys))
	for i := range lresp.Keys {
		ks[i] = string(lresp.Keys[i])
	}
	sort.Strings(ks)
	if !reflect.DeepEqual(ks, keys) {
		t.Fatalf("keys expected %v, got %v", keys, ks)
	}

	lresp, lerr = lapi.TimeToLive(context.Background(), resp.ID)
	if lerr != nil {
		t.Fatal(lerr)
	}
	if len(lresp.Keys) != 0 {
		t.Fatalf("unexpected keys %+v", lresp.Keys)
	}
}

开发者ID:hongchaodeng，项目名称:etcd，代码行数:52，代码来源:lease_test.go

示例14: setVal

func (n *ng) setVal(key string, val []byte, ttl time.Duration) error {
	ops := []etcd.OpOption{}
	if ttl > 0 {
		lgr, err := n.client.Grant(n.context, int64(ttl.Seconds()))
		if err != nil {
			return err
		}
		ops = append(ops, etcd.WithLease(lgr.ID))
	}

	_, err := n.client.Put(n.context, key, string(val), ops...)
	return convertErr(err)
}

开发者ID:vulcand，项目名称:vulcand，代码行数:13，代码来源:etcd.go

示例15: Lock

// Lock locks resources on sync
// This call blocks until you can get lock
func (s *Sync) Lock(path string, block bool) error {
	for {
		if s.HasLock(path) {
			return nil
		}
		var err error
		lease, err := s.etcdClient.Grant(s.withTimeout(), masterTTL)
		var resp *etcd.TxnResponse
		if err == nil {
			cmp := etcd.Compare(etcd.CreateRevision(path), "=", 0)
			put := etcd.OpPut(path, s.processID, etcd.WithLease(lease.ID))
			resp, err = s.etcdClient.Txn(s.withTimeout()).If(cmp).Then(put).Commit()
		}
		if err != nil || !resp.Succeeded {
			msg := fmt.Sprintf("failed to lock path %s", path)
			if err != nil {
				msg = fmt.Sprintf("failed to lock path %s: %s", path, err)
			}
			log.Notice(msg)

			s.locks.Remove(path)
			if !block {
				return errors.New(msg)
			}
			time.Sleep(masterTTL * time.Second)
			continue
		}
		log.Info("Locked %s", path)
		s.locks.Set(path, lease.ID)
		//Refresh master token
		go func() {
			defer func() {
				log.Notice("releasing keepalive lock for %s", path)
				s.locks.Remove(path)
			}()
			for s.HasLock(path) {
				ch, err := s.etcdClient.KeepAlive(s.withTimeout(), lease.ID)
				if err != nil {
					log.Notice("failed to keepalive lock for %s %s", path, err)
					return
				}
				for range ch {
				}
			}
		}()

		return nil
	}
}

开发者ID:cloudwan，项目名称:gohan，代码行数:51，代码来源:etcd.go

示例16: RegisterPeer

func (c *etcdCtx) RegisterPeer(lease int64, p *models.PeerInfo) error {
	if lease == 0 {
		return errors.New("no lease")
	}
	promOps.WithLabelValues("register-peer").Inc()
	p.LastSeen = time.Now().UnixNano()
	data, err := p.Marshal()
	if err != nil {
		return err
	}

	lid := etcdv3.LeaseID(lease)
	_, err = c.etcd.Client.Put(
		c.getContext(), MkKey("nodes", p.UUID), string(data), etcdv3.WithLease(lid))
	return err
}

开发者ID:ConfusedReality，项目名称:server_distributed-storage_torus，代码行数:16，代码来源:etcd.go

示例17: TestLeaseNotFoundError

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

	clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
	defer clus.Terminate(t)

	lapi := clientv3.NewLease(clus.RandClient())
	defer lapi.Close()

	kv := clientv3.NewKV(clus.RandClient())

	_, err := kv.Put(context.TODO(), "foo", "bar", clientv3.WithLease(clientv3.LeaseID(500)))
	if err != rpctypes.ErrLeaseNotFound {
		t.Fatalf("expected %v, got %v", rpctypes.ErrLeaseNotFound, err)
	}
}

开发者ID:mgurevin，项目名称:etcd，代码行数:16，代码来源:lease_test.go

示例18: Lock

// Lock locks the mutex with a cancellable context. If the context is cancelled
// while trying to acquire the lock, the mutex tries to clean its stale lock entry.
func (m *Mutex) Lock(ctx context.Context) error {
	s, err := NewSession(m.client)
	if err != nil {
		return err
	}
	// put self in lock waiters via myKey; oldest waiter holds lock
	m.myKey, m.myRev, err = NewUniqueKey(ctx, m.client, m.pfx, v3.WithLease(s.Lease()))
	// wait for deletion revisions prior to myKey
	err = waitDeletes(ctx, m.client, m.pfx, v3.WithPrefix(), v3.WithRev(m.myRev-1))
	// release lock key if cancelled
	select {
	case <-ctx.Done():
		m.Unlock()
	default:
	}
	return err
}

开发者ID:youtube，项目名称:doorman，代码行数:19，代码来源:mutex.go

示例19: Proclaim

// Proclaim lets the leader announce a new value without another election.
func (e *Election) Proclaim(ctx context.Context, val string) error {
	if e.leaderSession == nil {
		return ErrElectionNotLeader
	}
	cmp := v3.Compare(v3.CreateRevision(e.leaderKey), "=", e.leaderRev)
	txn := e.client.Txn(ctx).If(cmp)
	txn = txn.Then(v3.OpPut(e.leaderKey, val, v3.WithLease(e.leaderSession.Lease())))
	tresp, terr := txn.Commit()
	if terr != nil {
		return terr
	}
	if !tresp.Succeeded {
		e.leaderKey = ""
		return ErrElectionNotLeader
	}
	return nil
}

开发者ID:XiangrongFan，项目名称:etcd，代码行数:18，代码来源:election.go

示例20: TestKVPut

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

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

	lapi := clientv3.NewLease(clus.RandClient())
	defer lapi.Close()

	kv := clientv3.NewKV(clus.RandClient())
	ctx := context.TODO()

	resp, err := lapi.Create(context.Background(), 10)
	if err != nil {
		t.Fatalf("failed to create lease %v", err)
	}

	tests := []struct {
		key, val string
		leaseID  lease.LeaseID
	}{
		{"foo", "bar", lease.NoLease},
		{"hello", "world", lease.LeaseID(resp.ID)},
	}

	for i, tt := range tests {
		if _, err := kv.Put(ctx, tt.key, tt.val, clientv3.WithLease(tt.leaseID)); err != nil {
			t.Fatalf("#%d: couldn't put %q (%v)", i, tt.key, err)
		}
		resp, err := kv.Get(ctx, tt.key)
		if err != nil {
			t.Fatalf("#%d: couldn't get key (%v)", i, err)
		}
		if len(resp.Kvs) != 1 {
			t.Fatalf("#%d: expected 1 key, got %d", i, len(resp.Kvs))
		}
		if !bytes.Equal([]byte(tt.val), resp.Kvs[0].Value) {
			t.Errorf("#%d: val = %s, want %s", i, tt.val, resp.Kvs[0].Value)
		}
		if tt.leaseID != lease.LeaseID(resp.Kvs[0].Lease) {
			t.Errorf("#%d: val = %d, want %d", i, tt.leaseID, resp.Kvs[0].Lease)
		}
	}
}

开发者ID:veteranlu，项目名称:etcd，代码行数:44，代码来源:kv_test.go

注：本文中的github.com/coreos/etcd/clientv3.WithLease函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。