1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
// Copyright 2019 The etcd 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 rafttest
import (
"fmt"
"testing"
"github.com/cockroachdb/datadriven"
"go.etcd.io/etcd/raft/v3"
"go.etcd.io/etcd/raft/v3/raftpb"
)
func (env *InteractionEnv) handleProcessReady(t *testing.T, d datadriven.TestData) error {
idxs := nodeIdxs(t, d)
for _, idx := range idxs {
var err error
if len(idxs) > 1 {
fmt.Fprintf(env.Output, "> %d handling Ready\n", idx+1)
env.withIndent(func() { err = env.ProcessReady(idx) })
} else {
err = env.ProcessReady(idx)
}
if err != nil {
return err
}
}
return nil
}
// ProcessReady runs Ready handling on the node with the given index.
func (env *InteractionEnv) ProcessReady(idx int) error {
// TODO(tbg): Allow simulating crashes here.
rn, s := env.Nodes[idx].RawNode, env.Nodes[idx].Storage
rd := rn.Ready()
env.Output.WriteString(raft.DescribeReady(rd, defaultEntryFormatter))
// TODO(tbg): the order of operations here is not necessarily safe. See:
// https://github.com/etcd-io/etcd/pull/10861
if !raft.IsEmptyHardState(rd.HardState) {
if err := s.SetHardState(rd.HardState); err != nil {
return err
}
}
if err := s.Append(rd.Entries); err != nil {
return err
}
if !raft.IsEmptySnap(rd.Snapshot) {
if err := s.ApplySnapshot(rd.Snapshot); err != nil {
return err
}
}
for _, ent := range rd.CommittedEntries {
var update []byte
var cs *raftpb.ConfState
switch ent.Type {
case raftpb.EntryConfChange:
var cc raftpb.ConfChange
if err := cc.Unmarshal(ent.Data); err != nil {
return err
}
update = cc.Context
cs = rn.ApplyConfChange(cc)
case raftpb.EntryConfChangeV2:
var cc raftpb.ConfChangeV2
if err := cc.Unmarshal(ent.Data); err != nil {
return err
}
cs = rn.ApplyConfChange(cc)
update = cc.Context
default:
update = ent.Data
}
// Record the new state by starting with the current state and applying
// the command.
lastSnap := env.Nodes[idx].History[len(env.Nodes[idx].History)-1]
var snap raftpb.Snapshot
snap.Data = append(snap.Data, lastSnap.Data...)
// NB: this hard-codes an "appender" state machine.
snap.Data = append(snap.Data, update...)
snap.Metadata.Index = ent.Index
snap.Metadata.Term = ent.Term
if cs == nil {
sl := env.Nodes[idx].History
cs = &sl[len(sl)-1].Metadata.ConfState
}
snap.Metadata.ConfState = *cs
env.Nodes[idx].History = append(env.Nodes[idx].History, snap)
}
env.Messages = append(env.Messages, rd.Messages...)
rn.Advance(rd)
return nil
}
|
