126 lines
3.7 KiB
Go
126 lines
3.7 KiB
Go
// Copyright 2018 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build !cluster_proxy
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package integration
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import (
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"context"
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"fmt"
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"strings"
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"testing"
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"time"
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"go.etcd.io/etcd/clientv3"
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"go.etcd.io/etcd/integration"
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"go.etcd.io/etcd/pkg/testutil"
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)
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// TestWatchFragmentDisable ensures that large watch
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// response exceeding server-side request limit can
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// arrive even without watch response fragmentation.
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func TestWatchFragmentDisable(t *testing.T) {
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testWatchFragment(t, false, false)
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}
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// TestWatchFragmentDisableWithGRPCLimit verifies
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// large watch response exceeding server-side request
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// limit and client-side gRPC response receive limit
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// cannot arrive without watch events fragmentation,
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// because multiple events exceed client-side gRPC
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// response receive limit.
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func TestWatchFragmentDisableWithGRPCLimit(t *testing.T) {
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testWatchFragment(t, false, true)
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}
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// TestWatchFragmentEnable ensures that large watch
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// response exceeding server-side request limit arrive
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// with watch response fragmentation.
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func TestWatchFragmentEnable(t *testing.T) {
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testWatchFragment(t, true, false)
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}
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// TestWatchFragmentEnableWithGRPCLimit verifies
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// large watch response exceeding server-side request
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// limit and client-side gRPC response receive limit
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// can arrive only when watch events are fragmented.
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func TestWatchFragmentEnableWithGRPCLimit(t *testing.T) {
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testWatchFragment(t, true, true)
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}
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// testWatchFragment triggers watch response that spans over multiple
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// revisions exceeding server request limits when combined.
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func testWatchFragment(t *testing.T, fragment, exceedRecvLimit bool) {
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cfg := &integration.ClusterConfig{
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Size: 1,
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MaxRequestBytes: 1.5 * 1024 * 1024,
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}
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if exceedRecvLimit {
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cfg.ClientMaxCallRecvMsgSize = 1.5 * 1024 * 1024
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}
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clus := integration.NewClusterV3(t, cfg)
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defer clus.Terminate(t)
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cli := clus.Client(0)
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errc := make(chan error)
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for i := 0; i < 10; i++ {
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go func(i int) {
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_, err := cli.Put(context.TODO(),
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fmt.Sprint("foo", i),
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strings.Repeat("a", 1024*1024),
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)
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errc <- err
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}(i)
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}
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for i := 0; i < 10; i++ {
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if err := <-errc; err != nil {
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t.Fatalf("failed to put: %v", err)
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}
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}
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opts := []clientv3.OpOption{clientv3.WithPrefix(), clientv3.WithRev(1)}
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if fragment {
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opts = append(opts, clientv3.WithFragment())
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}
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wch := cli.Watch(context.TODO(), "foo", opts...)
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// expect 10 MiB watch response
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select {
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case ws := <-wch:
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// without fragment, should exceed gRPC client receive limit
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if !fragment && exceedRecvLimit {
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if len(ws.Events) != 0 {
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t.Fatalf("expected 0 events with watch fragmentation, got %d", len(ws.Events))
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}
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exp := "code = ResourceExhausted desc = grpc: received message larger than max ("
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if !strings.Contains(ws.Err().Error(), exp) {
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t.Fatalf("expected 'ResourceExhausted' error, got %v", ws.Err())
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}
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return
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}
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// still expect merged watch events
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if len(ws.Events) != 10 {
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t.Fatalf("expected 10 events with watch fragmentation, got %d", len(ws.Events))
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}
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if ws.Err() != nil {
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t.Fatalf("unexpected error %v", ws.Err())
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}
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case <-time.After(testutil.RequestTimeout):
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t.Fatalf("took too long to receive events")
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}
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}
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