Esempio n. 1
0
func TestCatalogListServices_Stale(t *testing.T) {
	dir1, s1 := testServer(t)
	defer os.RemoveAll(dir1)
	defer s1.Shutdown()
	client := rpcClient(t, s1)
	defer client.Close()

	args := structs.DCSpecificRequest{
		Datacenter: "dc1",
	}
	args.AllowStale = true
	var out structs.IndexedServices

	// Inject a fake service
	s1.fsm.State().EnsureNode(1, structs.Node{"foo", "127.0.0.1"})
	s1.fsm.State().EnsureService(2, "foo", &structs.NodeService{"db", "db", []string{"primary"}, "127.0.0.1", 5000})

	// Run the query, do not wait for leader!
	if err := client.Call("Catalog.ListServices", &args, &out); err != nil {
		t.Fatalf("err: %v", err)
	}

	// Should find the service
	if len(out.Services) != 1 {
		t.Fatalf("bad: %v", out)
	}

	// Should not have a leader! Stale read
	if out.KnownLeader {
		t.Fatalf("bad: %v", out)
	}
}
Esempio n. 2
0
// UINodes is used to list the nodes in a given datacenter. We return a
// NodeDump which provides overview information for all the nodes
func (s *HTTPServer) UINodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
	// Parse arguments
	args := structs.DCSpecificRequest{}
	if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
		return nil, nil
	}

	// Make the RPC request
	var out structs.IndexedNodeDump
	defer setMeta(resp, &out.QueryMeta)
RPC:
	if err := s.agent.RPC("Internal.NodeDump", &args, &out); err != nil {
		// Retry the request allowing stale data if no leader
		if strings.Contains(err.Error(), structs.ErrNoLeader.Error()) && !args.AllowStale {
			args.AllowStale = true
			goto RPC
		}
		return nil, err
	}
	return out.Dump, nil
}