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watchers_listener_test.go
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watchers_listener_test.go
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/*
*
* Copyright 2020 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:https://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 xdsclient
import (
"context"
"fmt"
"testing"
v3listenerpb "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
v3httppb "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/http_connection_manager/v3"
"google.golang.org/grpc/internal/testutils"
"google.golang.org/protobuf/types/known/anypb"
)
// TestLDSWatch covers the cases:
// - an update is received after a watch()
// - an update for another resource name
// - an update is received after cancel()
func (s) TestLDSWatch(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
ldsUpdateCh := testutils.NewChannel()
cancelWatch := client.WatchListener(testLDSName, func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
wantUpdate := ListenerUpdate{RouteConfigName: testRDSName}
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: wantUpdate}}, UpdateMetadata{})
if err := verifyListenerUpdate(ctx, ldsUpdateCh, wantUpdate, nil); err != nil {
t.Fatal(err)
}
// Push an update, with an extra resource for a different resource name.
// Specify a non-nil raw proto in the original resource to ensure that the
// new update is not considered equal to the old one.
newUpdate := ListenerUpdate{RouteConfigName: testRDSName, Raw: &anypb.Any{}}
client.NewListeners(map[string]ListenerUpdateErrTuple{
testLDSName: {Update: newUpdate},
"randomName": {},
}, UpdateMetadata{})
if err := verifyListenerUpdate(ctx, ldsUpdateCh, newUpdate, nil); err != nil {
t.Fatal(err)
}
// Cancel watch, and send update again.
cancelWatch()
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: wantUpdate}}, UpdateMetadata{})
sCtx, sCancel := context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if u, err := ldsUpdateCh.Receive(sCtx); err != context.DeadlineExceeded {
t.Fatalf("unexpected ListenerUpdate: %v, %v, want channel recv timeout", u, err)
}
}
// TestLDSTwoWatchSameResourceName covers the case where an update is received
// after two watch() for the same resource name.
func (s) TestLDSTwoWatchSameResourceName(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
const count = 2
var (
ldsUpdateChs []*testutils.Channel
cancelLastWatch func()
)
for i := 0; i < count; i++ {
ldsUpdateCh := testutils.NewChannel()
ldsUpdateChs = append(ldsUpdateChs, ldsUpdateCh)
cancelLastWatch = client.WatchListener(testLDSName, func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if i == 0 {
// A new watch is registered on the underlying API client only for
// the first iteration because we are using the same resource name.
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
}
}
wantUpdate := ListenerUpdate{RouteConfigName: testRDSName}
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: wantUpdate}}, UpdateMetadata{})
for i := 0; i < count; i++ {
if err := verifyListenerUpdate(ctx, ldsUpdateChs[i], wantUpdate, nil); err != nil {
t.Fatal(err)
}
}
// Cancel the last watch, and send update again. None of the watchers should
// be notified because one has been cancelled, and the other is receiving
// the same update.
cancelLastWatch()
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: wantUpdate}}, UpdateMetadata{})
for i := 0; i < count; i++ {
func() {
sCtx, sCancel := context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if u, err := ldsUpdateChs[i].Receive(sCtx); err != context.DeadlineExceeded {
t.Errorf("unexpected ListenerUpdate: %v, %v, want channel recv timeout", u, err)
}
}()
}
// Push a new update and make sure the uncancelled watcher is invoked.
// Specify a non-nil raw proto to ensure that the new update is not
// considered equal to the old one.
newUpdate := ListenerUpdate{RouteConfigName: testRDSName, Raw: &anypb.Any{}}
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: newUpdate}}, UpdateMetadata{})
if err := verifyListenerUpdate(ctx, ldsUpdateChs[0], newUpdate, nil); err != nil {
t.Fatal(err)
}
}
// TestLDSThreeWatchDifferentResourceName covers the case where an update is
// received after three watch() for different resource names.
func (s) TestLDSThreeWatchDifferentResourceName(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
var ldsUpdateChs []*testutils.Channel
const count = 2
// Two watches for the same name.
for i := 0; i < count; i++ {
ldsUpdateCh := testutils.NewChannel()
ldsUpdateChs = append(ldsUpdateChs, ldsUpdateCh)
client.WatchListener(testLDSName+"1", func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if i == 0 {
// A new watch is registered on the underlying API client only for
// the first iteration because we are using the same resource name.
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
}
}
// Third watch for a different name.
ldsUpdateCh2 := testutils.NewChannel()
client.WatchListener(testLDSName+"2", func(update ListenerUpdate, err error) {
ldsUpdateCh2.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
wantUpdate1 := ListenerUpdate{RouteConfigName: testRDSName + "1"}
wantUpdate2 := ListenerUpdate{RouteConfigName: testRDSName + "2"}
client.NewListeners(map[string]ListenerUpdateErrTuple{
testLDSName + "1": {Update: wantUpdate1},
testLDSName + "2": {Update: wantUpdate2},
}, UpdateMetadata{})
for i := 0; i < count; i++ {
if err := verifyListenerUpdate(ctx, ldsUpdateChs[i], wantUpdate1, nil); err != nil {
t.Fatal(err)
}
}
if err := verifyListenerUpdate(ctx, ldsUpdateCh2, wantUpdate2, nil); err != nil {
t.Fatal(err)
}
}
// TestLDSWatchAfterCache covers the case where watch is called after the update
// is in cache.
func (s) TestLDSWatchAfterCache(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
ldsUpdateCh := testutils.NewChannel()
client.WatchListener(testLDSName, func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
wantUpdate := ListenerUpdate{RouteConfigName: testRDSName}
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: wantUpdate}}, UpdateMetadata{})
if err := verifyListenerUpdate(ctx, ldsUpdateCh, wantUpdate, nil); err != nil {
t.Fatal(err)
}
// Another watch for the resource in cache.
ldsUpdateCh2 := testutils.NewChannel()
client.WatchListener(testLDSName, func(update ListenerUpdate, err error) {
ldsUpdateCh2.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
sCtx, sCancel := context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if n, err := apiClient.addWatches[ListenerResource].Receive(sCtx); err != context.DeadlineExceeded {
t.Fatalf("want no new watch to start (recv timeout), got resource name: %v error %v", n, err)
}
// New watch should receive the update.
if err := verifyListenerUpdate(ctx, ldsUpdateCh2, wantUpdate, nil); err != nil {
t.Fatal(err)
}
// Old watch should see nothing.
sCtx, sCancel = context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if u, err := ldsUpdateCh.Receive(sCtx); err != context.DeadlineExceeded {
t.Errorf("unexpected ListenerUpdate: %v, %v, want channel recv timeout", u, err)
}
}
// TestLDSResourceRemoved covers the cases:
// - an update is received after a watch()
// - another update is received, with one resource removed
// - this should trigger callback with resource removed error
// - one more update without the removed resource
// - the callback (above) shouldn't receive any update
func (s) TestLDSResourceRemoved(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
ldsUpdateCh1 := testutils.NewChannel()
client.WatchListener(testLDSName+"1", func(update ListenerUpdate, err error) {
ldsUpdateCh1.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
// Another watch for a different name.
ldsUpdateCh2 := testutils.NewChannel()
client.WatchListener(testLDSName+"2", func(update ListenerUpdate, err error) {
ldsUpdateCh2.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
wantUpdate1 := ListenerUpdate{RouteConfigName: testEDSName + "1"}
wantUpdate2 := ListenerUpdate{RouteConfigName: testEDSName + "2"}
client.NewListeners(map[string]ListenerUpdateErrTuple{
testLDSName + "1": {Update: wantUpdate1},
testLDSName + "2": {Update: wantUpdate2},
}, UpdateMetadata{})
if err := verifyListenerUpdate(ctx, ldsUpdateCh1, wantUpdate1, nil); err != nil {
t.Fatal(err)
}
if err := verifyListenerUpdate(ctx, ldsUpdateCh2, wantUpdate2, nil); err != nil {
t.Fatal(err)
}
// Send another update to remove resource 1.
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName + "2": {Update: wantUpdate2}}, UpdateMetadata{})
// Watcher 1 should get an error.
if u, err := ldsUpdateCh1.Receive(ctx); err != nil || ErrType(u.(ListenerUpdateErrTuple).Err) != ErrorTypeResourceNotFound {
t.Errorf("unexpected ListenerUpdate: %v, error receiving from channel: %v, want update with error resource not found", u, err)
}
// Watcher 2 should not see an update since the resource has not changed.
sCtx, sCancel := context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if u, err := ldsUpdateCh2.Receive(sCtx); err != context.DeadlineExceeded {
t.Errorf("unexpected ListenerUpdate: %v, want receiving from channel timeout", u)
}
// Send another update with resource 2 modified. Specify a non-nil raw proto
// to ensure that the new update is not considered equal to the old one.
wantUpdate2 = ListenerUpdate{RouteConfigName: testEDSName + "2", Raw: &anypb.Any{}}
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName + "2": {Update: wantUpdate2}}, UpdateMetadata{})
// Watcher 1 should not see an update.
sCtx, sCancel = context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if u, err := ldsUpdateCh1.Receive(sCtx); err != context.DeadlineExceeded {
t.Errorf("unexpected ListenerUpdate: %v, want receiving from channel timeout", u)
}
// Watcher 2 should get the update.
if err := verifyListenerUpdate(ctx, ldsUpdateCh2, wantUpdate2, nil); err != nil {
t.Fatal(err)
}
}
// TestListenerWatchNACKError covers the case that an update is NACK'ed, and the
// watcher should also receive the error.
func (s) TestListenerWatchNACKError(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
ldsUpdateCh := testutils.NewChannel()
cancelWatch := client.WatchListener(testLDSName, func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
defer cancelWatch()
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
wantError := fmt.Errorf("testing error")
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Err: wantError}}, UpdateMetadata{ErrState: &UpdateErrorMetadata{Err: wantError}})
if err := verifyListenerUpdate(ctx, ldsUpdateCh, ListenerUpdate{}, wantError); err != nil {
t.Fatal(err)
}
}
// TestListenerWatchPartialValid covers the case that a response contains both
// valid and invalid resources. This response will be NACK'ed by the xdsclient.
// But the watchers with valid resources should receive the update, those with
// invalida resources should receive an error.
func (s) TestListenerWatchPartialValid(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
const badResourceName = "bad-resource"
updateChs := make(map[string]*testutils.Channel)
for _, name := range []string{testLDSName, badResourceName} {
ldsUpdateCh := testutils.NewChannel()
cancelWatch := client.WatchListener(name, func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
defer func() {
cancelWatch()
if _, err := apiClient.removeWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want watch to be canceled, got err: %v", err)
}
}()
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
updateChs[name] = ldsUpdateCh
}
wantError := fmt.Errorf("testing error")
wantError2 := fmt.Errorf("individual error")
client.NewListeners(map[string]ListenerUpdateErrTuple{
testLDSName: {Update: ListenerUpdate{RouteConfigName: testEDSName}},
badResourceName: {Err: wantError2},
}, UpdateMetadata{ErrState: &UpdateErrorMetadata{Err: wantError}})
// The valid resource should be sent to the watcher.
if err := verifyListenerUpdate(ctx, updateChs[testLDSName], ListenerUpdate{RouteConfigName: testEDSName}, nil); err != nil {
t.Fatal(err)
}
// The failed watcher should receive an error.
if err := verifyListenerUpdate(ctx, updateChs[badResourceName], ListenerUpdate{}, wantError2); err != nil {
t.Fatal(err)
}
}
// TestListenerWatch_RedundantUpdateSupression tests scenarios where an update
// with an unmodified resource is suppressed, and modified resource is not.
func (s) TestListenerWatch_RedundantUpdateSupression(t *testing.T) {
apiClientCh, cleanup := overrideNewAPIClient()
defer cleanup()
client, err := newWithConfig(clientOpts(testXDSServer, false))
if err != nil {
t.Fatalf("failed to create client: %v", err)
}
defer client.Close()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
c, err := apiClientCh.Receive(ctx)
if err != nil {
t.Fatalf("timeout when waiting for API client to be created: %v", err)
}
apiClient := c.(*testAPIClient)
ldsUpdateCh := testutils.NewChannel()
client.WatchListener(testLDSName, func(update ListenerUpdate, err error) {
ldsUpdateCh.Send(ListenerUpdateErrTuple{Update: update, Err: err})
})
if _, err := apiClient.addWatches[ListenerResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
basicListener := testutils.MarshalAny(&v3listenerpb.Listener{
Name: testLDSName,
ApiListener: &v3listenerpb.ApiListener{
ApiListener: testutils.MarshalAny(&v3httppb.HttpConnectionManager{
RouteSpecifier: &v3httppb.HttpConnectionManager_Rds{
Rds: &v3httppb.Rds{RouteConfigName: "route-config-name"},
},
}),
},
})
listenerWithFilter1 := testutils.MarshalAny(&v3listenerpb.Listener{
Name: testLDSName,
ApiListener: &v3listenerpb.ApiListener{
ApiListener: testutils.MarshalAny(&v3httppb.HttpConnectionManager{
RouteSpecifier: &v3httppb.HttpConnectionManager_Rds{
Rds: &v3httppb.Rds{RouteConfigName: "route-config-name"},
},
HttpFilters: []*v3httppb.HttpFilter{
{
Name: "customFilter1",
ConfigType: &v3httppb.HttpFilter_TypedConfig{TypedConfig: customFilterConfig},
},
},
}),
},
})
listenerWithFilter2 := testutils.MarshalAny(&v3listenerpb.Listener{
Name: testLDSName,
ApiListener: &v3listenerpb.ApiListener{
ApiListener: testutils.MarshalAny(&v3httppb.HttpConnectionManager{
RouteSpecifier: &v3httppb.HttpConnectionManager_Rds{
Rds: &v3httppb.Rds{RouteConfigName: "route-config-name"},
},
HttpFilters: []*v3httppb.HttpFilter{
{
Name: "customFilter2",
ConfigType: &v3httppb.HttpFilter_TypedConfig{TypedConfig: customFilterConfig},
},
},
}),
},
})
tests := []struct {
update ListenerUpdate
wantCallback bool
}{
{
// First update. Callback should be invoked.
update: ListenerUpdate{Raw: basicListener},
wantCallback: true,
},
{
// Same update as previous. Callback should be skipped.
update: ListenerUpdate{Raw: basicListener},
wantCallback: false,
},
{
// New update. Callback should be invoked.
update: ListenerUpdate{Raw: listenerWithFilter1},
wantCallback: true,
},
{
// Same update as previous. Callback should be skipped.
update: ListenerUpdate{Raw: listenerWithFilter1},
wantCallback: false,
},
{
// New update. Callback should be invoked.
update: ListenerUpdate{Raw: listenerWithFilter2},
wantCallback: true,
},
{
// Same update as previous. Callback should be skipped.
update: ListenerUpdate{Raw: listenerWithFilter2},
wantCallback: false,
},
}
for _, test := range tests {
client.NewListeners(map[string]ListenerUpdateErrTuple{testLDSName: {Update: test.update}}, UpdateMetadata{})
if test.wantCallback {
if err := verifyListenerUpdate(ctx, ldsUpdateCh, test.update, nil); err != nil {
t.Fatal(err)
}
} else {
sCtx, sCancel := context.WithTimeout(ctx, defaultTestShortTimeout)
defer sCancel()
if u, err := ldsUpdateCh.Receive(sCtx); err != context.DeadlineExceeded {
t.Errorf("unexpected ListenerUpdate: %v, want receiving from channel timeout", u)
}
}
}
}