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misc_watchers_test.go
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/
misc_watchers_test.go
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/*
*
* Copyright 2022 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package e2e_test
import (
"context"
"testing"
"google.golang.org/grpc/internal/testutils"
"google.golang.org/grpc/internal/testutils/xds/e2e"
"google.golang.org/grpc/xds/internal/xdsclient"
"google.golang.org/grpc/xds/internal/xdsclient/xdsresource"
v3routepb "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
)
// TestWatchCallAnotherWatch tests the scenario where a watch is registered for
// a resource, and more watches are registered from the first watch's callback.
// The test verifies that this scenario does not lead to a deadlock.
func (s) TestWatchCallAnotherWatch(t *testing.T) {
overrideFedEnvVar(t)
// Start an xDS management server and set the option to allow it to respond
// to requests which only specify a subset of the configured resources.
mgmtServer, nodeID, bootstrapContents, _, cleanup := e2e.SetupManagementServer(t, &e2e.ManagementServerOptions{AllowResourceSubset: true})
defer cleanup()
// Create an xDS client with the above bootstrap contents.
client, err := xdsclient.NewWithBootstrapContentsForTesting(bootstrapContents)
if err != nil {
t.Fatalf("Failed to create xDS client: %v", err)
}
defer client.Close()
// Configure the management server to respond with route config resources.
resources := e2e.UpdateOptions{
NodeID: nodeID,
Routes: []*v3routepb.RouteConfiguration{
e2e.DefaultRouteConfig(rdsName, ldsName, cdsName),
e2e.DefaultRouteConfig(rdsNameNewStyle, ldsNameNewStyle, cdsName),
},
SkipValidation: true,
}
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
if err := mgmtServer.Update(ctx, resources); err != nil {
t.Fatalf("Failed to update management server with resources: %v, err: %v", resources, err)
}
// Start a watch for one route configuration resource. From the watch
// callback of the first resource, register two more watches (one for the
// same resource name, which would be satisfied from the cache, and another
// for a different resource name, which would be satisfied from the server).
updateCh1 := testutils.NewChannel()
updateCh2 := testutils.NewChannel()
updateCh3 := testutils.NewChannel()
var rdsCancel2, rdsCancel3 func()
rdsCancel1 := client.WatchRouteConfig(rdsName, func(u xdsresource.RouteConfigUpdate, err error) {
updateCh1.Send(xdsresource.RouteConfigUpdateErrTuple{Update: u, Err: err})
// Watch for the same resource name.
rdsCancel2 = client.WatchRouteConfig(rdsName, func(u xdsresource.RouteConfigUpdate, err error) {
updateCh2.Send(xdsresource.RouteConfigUpdateErrTuple{Update: u, Err: err})
})
t.Cleanup(rdsCancel2)
// Watch for a different resource name.
rdsCancel3 = client.WatchRouteConfig(rdsNameNewStyle, func(u xdsresource.RouteConfigUpdate, err error) {
updateCh3.Send(xdsresource.RouteConfigUpdateErrTuple{Update: u, Err: err})
rdsCancel3()
})
t.Cleanup(rdsCancel3)
})
t.Cleanup(rdsCancel1)
// Verify the contents of the received update for the all watchers.
wantUpdate12 := xdsresource.RouteConfigUpdateErrTuple{
Update: xdsresource.RouteConfigUpdate{
VirtualHosts: []*xdsresource.VirtualHost{
{
Domains: []string{ldsName},
Routes: []*xdsresource.Route{
{
Prefix: newStringP("/"),
ActionType: xdsresource.RouteActionRoute,
WeightedClusters: map[string]xdsresource.WeightedCluster{cdsName: {Weight: 1}},
},
},
},
},
},
}
wantUpdate3 := xdsresource.RouteConfigUpdateErrTuple{
Update: xdsresource.RouteConfigUpdate{
VirtualHosts: []*xdsresource.VirtualHost{
{
Domains: []string{ldsNameNewStyle},
Routes: []*xdsresource.Route{
{
Prefix: newStringP("/"),
ActionType: xdsresource.RouteActionRoute,
WeightedClusters: map[string]xdsresource.WeightedCluster{cdsName: {Weight: 1}},
},
},
},
},
},
}
if err := verifyRouteConfigUpdate(ctx, updateCh1, wantUpdate12); err != nil {
t.Fatal(err)
}
if err := verifyRouteConfigUpdate(ctx, updateCh2, wantUpdate12); err != nil {
t.Fatal(err)
}
if err := verifyRouteConfigUpdate(ctx, updateCh3, wantUpdate3); err != nil {
t.Fatal(err)
}
}