Exemplo n.º 1
0
Arquivo: node.go Projeto: Mic92/docker
func (n *Node) initManagerConnection(ctx context.Context, ready chan<- struct{}) error {
	opts := []grpc.DialOption{}
	insecureCreds := credentials.NewTLS(&tls.Config{InsecureSkipVerify: true})
	opts = append(opts, grpc.WithTransportCredentials(insecureCreds))
	// Using listen address instead of advertised address because this is a
	// local connection.
	addr := n.config.ListenControlAPI
	opts = append(opts, grpc.WithDialer(
		func(addr string, timeout time.Duration) (net.Conn, error) {
			return net.DialTimeout("unix", addr, timeout)
		}))
	conn, err := grpc.Dial(addr, opts...)
	if err != nil {
		return err
	}
	client := api.NewHealthClient(conn)
	for {
		resp, err := client.Check(ctx, &api.HealthCheckRequest{Service: "ControlAPI"})
		if err != nil {
			return err
		}
		if resp.Status == api.HealthCheckResponse_SERVING {
			break
		}
		time.Sleep(500 * time.Millisecond)
	}
	n.setControlSocket(conn)
	if ready != nil {
		close(ready)
	}
	return nil
}
Exemplo n.º 2
0
Arquivo: raft.go Projeto: yank1/docker
// checkHealth tries to contact an aspiring member through its advertised address
// and checks if its raft server is running.
func (n *Node) checkHealth(ctx context.Context, addr string, timeout time.Duration) error {
	conn, err := dial(addr, "tcp", n.tlsCredentials, timeout)
	if err != nil {
		return err
	}

	if timeout != 0 {
		tctx, cancel := context.WithTimeout(ctx, timeout)
		defer cancel()
		ctx = tctx
	}

	client := api.NewHealthClient(conn)
	defer conn.Close()

	resp, err := client.Check(ctx, &api.HealthCheckRequest{Service: "Raft"})
	if err != nil {
		return ErrHealthCheckFailure
	}
	if resp != nil && resp.Status != api.HealthCheckResponse_SERVING {
		return ErrHealthCheckFailure
	}

	return nil
}
Exemplo n.º 3
0
func healthCheckConn(ctx context.Context, cc *grpc.ClientConn) error {
	resp, err := api.NewHealthClient(cc).Check(ctx, &api.HealthCheckRequest{Service: "Raft"})
	if err != nil {
		return errors.Wrap(err, "failed to check health")
	}
	if resp.Status != api.HealthCheckResponse_SERVING {
		return errors.Errorf("health check returned status %s", resp.Status)
	}
	return nil
}
Exemplo n.º 4
0
// HealthCheck sends a health check RPC to the member and returns the response.
func (member *Member) HealthCheck(ctx context.Context) error {
	healthClient := api.NewHealthClient(member.Conn)
	resp, err := healthClient.Check(ctx, &api.HealthCheckRequest{Service: "Raft"})
	if err != nil {
		return err
	}
	if resp.Status != api.HealthCheckResponse_SERVING {
		return fmt.Errorf("health check returned status %s", resp.Status.String())
	}
	return nil
}