Golang TestNode.GetMemberlist方法代碼示例

func TestRaftLeaderDown(t *testing.T) {
	t.Parallel()

	nodes, clockSource := raftutils.NewRaftCluster(t, tc)
	defer raftutils.TeardownCluster(t, nodes)

	// Stop node 1
	nodes[1].Stop()

	newCluster := map[uint64]*raftutils.TestNode{
		2: nodes[2],
		3: nodes[3],
	}
	// Wait for the re-election to occur
	raftutils.WaitForCluster(t, clockSource, newCluster)

	// Leader should not be 1
	assert.NotEqual(t, nodes[2].Leader(), nodes[1].Config.ID)

	// Ensure that node 2 and node 3 have the same leader
	assert.Equal(t, nodes[3].Leader(), nodes[2].Leader())

	// Find the leader node and a follower node
	var (
		leaderNode   *raftutils.TestNode
		followerNode *raftutils.TestNode
	)
	for i, n := range newCluster {
		if n.Config.ID == n.Leader() {
			leaderNode = n
			if i == 2 {
				followerNode = newCluster[3]
			} else {
				followerNode = newCluster[2]
			}
		}
	}

	require.NotNil(t, leaderNode)
	require.NotNil(t, followerNode)

	// Propose a value
	value, err := raftutils.ProposeValue(t, leaderNode)
	assert.NoError(t, err, "failed to propose value")

	// The value should be replicated on all remaining nodes
	raftutils.CheckValue(t, clockSource, leaderNode, value)
	assert.Equal(t, len(leaderNode.GetMemberlist()), 3)

	raftutils.CheckValue(t, clockSource, followerNode, value)
	assert.Equal(t, len(followerNode.GetMemberlist()), 3)
}

func TestRaftLeaderLeave(t *testing.T) {
	t.Parallel()

	nodes, clockSource := raftutils.NewRaftCluster(t, tc)

	// node 1 is the leader
	assert.Equal(t, nodes[1].Leader(), nodes[1].Config.ID)

	// Try to leave the raft
	// Use gRPC instead of calling handler directly because of
	// authorization check.
	client, err := nodes[1].ConnectToMember(nodes[1].Address, 10*time.Second)
	assert.NoError(t, err)
	defer client.Conn.Close()
	raftClient := api.NewRaftMembershipClient(client.Conn)
	ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
	resp, err := raftClient.Leave(ctx, &api.LeaveRequest{Node: &api.RaftMember{RaftID: nodes[1].Config.ID}})
	assert.NoError(t, err, "error sending message to leave the raft")
	assert.NotNil(t, resp, "leave response message is nil")

	newCluster := map[uint64]*raftutils.TestNode{
		2: nodes[2],
		3: nodes[3],
	}
	// Wait for election tick
	raftutils.WaitForCluster(t, clockSource, newCluster)

	// Leader should not be 1
	assert.NotEqual(t, nodes[2].Leader(), nodes[1].Config.ID)
	assert.Equal(t, nodes[2].Leader(), nodes[3].Leader())

	leader := nodes[2].Leader()

	// Find the leader node and a follower node
	var (
		leaderNode   *raftutils.TestNode
		followerNode *raftutils.TestNode
	)
	for i, n := range nodes {
		if n.Config.ID == leader {
			leaderNode = n
			if i == 2 {
				followerNode = nodes[3]
			} else {
				followerNode = nodes[2]
			}
		}
	}

	require.NotNil(t, leaderNode)
	require.NotNil(t, followerNode)

	// Propose a value
	value, err := raftutils.ProposeValue(t, leaderNode)
	assert.NoError(t, err, "failed to propose value")

	// The value should be replicated on all remaining nodes
	raftutils.CheckValue(t, clockSource, leaderNode, value)
	assert.Equal(t, len(leaderNode.GetMemberlist()), 2)

	raftutils.CheckValue(t, clockSource, followerNode, value)
	assert.Equal(t, len(followerNode.GetMemberlist()), 2)

	raftutils.TeardownCluster(t, newCluster)
}

func testUpdateNodeDemote(leader bool, t *testing.T) {
	tc := cautils.NewTestCA(nil)
	defer tc.Stop()
	ts := newTestServer(t)
	defer ts.Stop()

	nodes, clockSource := raftutils.NewRaftCluster(t, tc)
	defer raftutils.TeardownCluster(t, nodes)

	// Assign one of the raft node to the test server
	ts.Server.raft = nodes[1].Node
	ts.Server.store = nodes[1].MemoryStore()

	// Create a node object for each of the managers
	assert.NoError(t, nodes[1].MemoryStore().Update(func(tx store.Tx) error {
		assert.NoError(t, store.CreateNode(tx, &api.Node{
			ID: nodes[1].SecurityConfig.ClientTLSCreds.NodeID(),
			Spec: api.NodeSpec{
				Role:       api.NodeRoleManager,
				Membership: api.NodeMembershipAccepted,
			},
		}))
		assert.NoError(t, store.CreateNode(tx, &api.Node{
			ID: nodes[2].SecurityConfig.ClientTLSCreds.NodeID(),
			Spec: api.NodeSpec{
				Role:       api.NodeRoleManager,
				Membership: api.NodeMembershipAccepted,
			},
		}))
		assert.NoError(t, store.CreateNode(tx, &api.Node{
			ID: nodes[3].SecurityConfig.ClientTLSCreds.NodeID(),
			Spec: api.NodeSpec{
				Role:       api.NodeRoleManager,
				Membership: api.NodeMembershipAccepted,
			},
		}))
		return nil
	}))

	// Stop Node 3 (1 node out of 3)
	nodes[3].Server.Stop()
	nodes[3].ShutdownRaft()

	// Node 3 should be listed as Unreachable
	assert.NoError(t, raftutils.PollFunc(clockSource, func() error {
		members := nodes[1].GetMemberlist()
		if len(members) != 3 {
			return fmt.Errorf("expected 3 nodes, got %d", len(members))
		}
		if members[nodes[3].Config.ID].Status.Reachability == api.RaftMemberStatus_REACHABLE {
			return fmt.Errorf("expected node 3 to be unreachable")
		}
		return nil
	}))

	// Try to demote Node 2, this should fail because of the quorum safeguard
	r, err := ts.Client.GetNode(context.Background(), &api.GetNodeRequest{NodeID: nodes[2].SecurityConfig.ClientTLSCreds.NodeID()})
	assert.NoError(t, err)
	spec := r.Node.Spec.Copy()
	spec.Role = api.NodeRoleWorker
	version := &r.Node.Meta.Version
	_, err = ts.Client.UpdateNode(context.Background(), &api.UpdateNodeRequest{
		NodeID:      nodes[2].SecurityConfig.ClientTLSCreds.NodeID(),
		Spec:        spec,
		NodeVersion: version,
	})
	assert.Error(t, err)
	assert.Equal(t, codes.FailedPrecondition, grpc.Code(err))

	// Restart Node 3
	nodes[3] = raftutils.RestartNode(t, clockSource, nodes[3], false)
	raftutils.WaitForCluster(t, clockSource, nodes)

	// Node 3 should be listed as Reachable
	assert.NoError(t, raftutils.PollFunc(clockSource, func() error {
		members := nodes[1].GetMemberlist()
		if len(members) != 3 {
			return fmt.Errorf("expected 3 nodes, got %d", len(members))
		}
		if members[nodes[3].Config.ID].Status.Reachability == api.RaftMemberStatus_UNREACHABLE {
			return fmt.Errorf("expected node 3 to be reachable")
		}
		return nil
	}))

	// Try to demote Node 3, this should succeed
	r, err = ts.Client.GetNode(context.Background(), &api.GetNodeRequest{NodeID: nodes[3].SecurityConfig.ClientTLSCreds.NodeID()})
	assert.NoError(t, err)
	spec = r.Node.Spec.Copy()
	spec.Role = api.NodeRoleWorker
	version = &r.Node.Meta.Version
	_, err = ts.Client.UpdateNode(context.Background(), &api.UpdateNodeRequest{
		NodeID:      nodes[3].SecurityConfig.ClientTLSCreds.NodeID(),
		Spec:        spec,
		NodeVersion: version,
	})
	assert.NoError(t, err)

	newCluster := map[uint64]*raftutils.TestNode{
		1: nodes[1],
//.........這裏部分代碼省略.........