mirror of
https://github.com/etcd-io/etcd.git
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96 lines
3.5 KiB
Go
96 lines
3.5 KiB
Go
// Copyright 2024 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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package integration
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import (
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"context"
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"errors"
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"testing"
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"time"
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pb "go.etcd.io/etcd/api/v3/etcdserverpb"
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"go.etcd.io/etcd/tests/v3/framework/integration"
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)
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// TestRaftLogCompaction tests whether raft log snapshot and compaction work correctly.
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func TestRaftLogCompaction(t *testing.T) {
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integration.BeforeTest(t)
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clus := integration.NewCluster(t, &integration.ClusterConfig{
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Size: 1,
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SnapshotCount: 10,
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SnapshotCatchUpEntries: 5,
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})
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defer clus.Terminate(t)
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mem := clus.Members[0]
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kvc := integration.ToGRPC(mem.Client).KV
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// When starting a new cluster with 1 member, the member will have an index of 4.
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// TODO: Can someone explain this?
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// Currently, if `ep.appliedi-ep.snapi > s.Cfg.SnapshotCount`,
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// a raft log snapshot is created, and raft log entries are compacted.
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// In this case, it triggers when the index is a multiple of 11.
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appliedi := 4
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for ; appliedi <= 10; appliedi++ {
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_, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")})
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if err != nil {
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t.Errorf("#%d: couldn't put key (%v)", appliedi, err)
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}
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}
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// The first snapshot and compaction shouldn't happen because the index is less than 11
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expectMemberLogTimeout(t, mem, 5*time.Second, "saved snapshot", 1)
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expectMemberLogTimeout(t, mem, time.Second, "compacted Raft logs", 1)
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for ; appliedi <= 11; appliedi++ {
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_, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")})
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if err != nil {
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t.Errorf("#%d: couldn't put key (%v)", appliedi, err)
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}
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}
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// The first snapshot and compaction should happen because the index is 11
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expectMemberLog(t, mem, 5*time.Second, "saved snapshot", 1)
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expectMemberLog(t, mem, time.Second, "compacted Raft logs", 1)
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expectMemberLog(t, mem, time.Second, "\"compact-index\": 6", 1)
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for ; appliedi <= 1100; appliedi++ {
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_, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")})
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if err != nil {
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t.Errorf("#%d: couldn't put key (%v)", appliedi, err)
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}
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}
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// With the index at 1100, snapshot and compaction should happen 100 times.
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expectMemberLog(t, mem, 5*time.Second, "saved snapshot", 100)
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expectMemberLog(t, mem, time.Second, "compacted Raft logs", 100)
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expectMemberLog(t, mem, time.Second, "\"compact-index\": 1095", 1)
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// No more snapshot and compaction should happen.
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expectMemberLogTimeout(t, mem, 5*time.Second, "saved snapshot", 101)
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expectMemberLogTimeout(t, mem, time.Second, "compacted Raft logs", 101)
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}
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// expectMemberLogTimeout ensures that the log has fewer than `count` occurrences of `s` before timing out
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func expectMemberLogTimeout(t *testing.T, m *integration.Member, timeout time.Duration, s string, count int) {
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ctx, cancel := context.WithTimeout(context.TODO(), timeout)
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defer cancel()
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_, err := m.LogObserver.Expect(ctx, s, count)
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if !errors.Is(err, context.DeadlineExceeded) {
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if err != nil {
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t.Fatalf("failed to expect (log:%s, count:%v): %v", s, count, err)
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}
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}
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}
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