forked from Quentin-M/etcd-cloud-operator
-
Notifications
You must be signed in to change notification settings - Fork 0
/
test_cases.go
183 lines (159 loc) · 5.05 KB
/
test_cases.go
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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
// Copyright 2017 Quentin Machu & eco 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 tester
import (
"errors"
"sync"
"github.com/coreos/etcd/etcdserver/etcdserverpb"
"github.com/quentin-m/etcd-cloud-operator/pkg/etcd"
)
type failureInjectorConfig struct {
client *etcd.Client
testerConfig Config
leaderID uint64
}
type failureInjector func(failureInjectorConfig) error
type testCase struct {
name string
fi failureInjector
isLossy bool
}
var testCases = []testCase{
{name: "killLeader", fi: killLeader},
{name: "killOneSlave", fi: killOneSlave},
{name: "killMajority", fi: killMajority},
{name: "killAll", fi: killAll},
{name: "killWipeOneSlave", fi: killWipeOneSlave},
{name: "killWipeMajority", fi: killWipeMajority},
{name: "killWipeAll", fi: killWipeAll, isLossy: true},
{name: "stopWipeAll", fi: stopWipeAll},
}
func killLeader(cfg failureInjectorConfig) error {
var killed bool
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
if member.ID == cfg.leaderID {
killed = true
return execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator")
}
return nil
}
if err := cfg.client.ForEachMember(f); err != nil {
return err
}
if !killed {
return errors.New("could not find leader to kill")
}
return nil
}
func killOneSlave(cfg failureInjectorConfig) error {
var once sync.Once
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
if member.ID != cfg.leaderID {
var err error
once.Do(func() {
err = execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator")
})
return err
}
return nil
}
if err := cfg.client.ForEachMember(f); err != nil {
return err
}
return nil
}
func killMajority(cfg failureInjectorConfig) error {
var i int
var mi sync.Mutex
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
mi.Lock()
defer mi.Unlock()
if i < cfg.testerConfig.Cluster.Size/2+1 {
i++
return execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator")
}
return nil
}
err := cfg.client.ForEachMember(f)
return err
}
func killAll(cfg failureInjectorConfig) error {
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
return execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator")
}
err := cfg.client.ForEachMember(f)
return err
}
// killWipeOneSlave kills an ECO instance and wipes its data directory.
//
// The restarting ECO instance will see itself part of the cluster but won't be able to join until the rest of the
// cluster has excluded the unhealthy member. The impact should be limited by the load balancer health check however.
func killWipeOneSlave(cfg failureInjectorConfig) error {
var once sync.Once
var err error
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
if member.ID != cfg.leaderID {
once.Do(func() {
err = execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator; sudo rm -rf /var/lib/eco/*")
})
return err
}
return nil
}
if err := cfg.client.ForEachMember(f); err != nil {
return err
}
return nil
}
// killWipeMajority kills a majority of ECO instances and wipes their data directory.
//
// The remaining ECO instance will notice the cluster has lost quorum, perform a snapshot
// and leave. Once instances are back up, a cluster will be re-seeded from the snapshot.
func killWipeMajority(cfg failureInjectorConfig) error {
var i int
var mi sync.Mutex
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
mi.Lock()
defer mi.Unlock()
if i < cfg.testerConfig.Cluster.Size/2+1 {
i++
return execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator; sudo rm -rf /var/lib/eco/*")
}
return nil
}
err := cfg.client.ForEachMember(f)
return err
}
func killWipeAll(cfg failureInjectorConfig) error {
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
return execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -9 operator; sudo rm -rf /var/lib/eco/*")
}
if err := cfg.client.ForEachMember(f); err != nil {
return err
}
return nil
}
func stopWipeAll(cfg failureInjectorConfig) error {
f := func(client *etcd.Client, member *etcdserverpb.Member) error {
return execRemote(etcd.URL2Address(member.PeerURLs[0]), "sudo pkill -15 operator; tail --pid=$(pgrep operator) -f /dev/null; sudo rm -rf /var/lib/eco/*")
}
if err := cfg.client.ForEachMember(f); err != nil {
return err
}
return nil
}
// TODO:
// - Network partition (leader, member)
// - Slow network (leader, member, all)
// - Corrupted network (leader, member)