/usr/share/gocode/src/gopkg.in/redis.v2/sentinel_test.go is in golang-gopkg-redis.v2-dev 2.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | package redis_test
import (
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"testing"
"text/template"
"time"
"gopkg.in/redis.v2"
)
func startRedis(port string) (*exec.Cmd, error) {
cmd := exec.Command("redis-server", "--port", port)
if false {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
}
if err := cmd.Start(); err != nil {
return nil, err
}
return cmd, nil
}
func startRedisSlave(port, slave string) (*exec.Cmd, error) {
cmd := exec.Command("redis-server", "--port", port, "--slaveof", "127.0.0.1", slave)
if false {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
}
if err := cmd.Start(); err != nil {
return nil, err
}
return cmd, nil
}
func startRedisSentinel(port, masterName, masterPort string) (*exec.Cmd, error) {
dir, err := ioutil.TempDir("", "sentinel")
if err != nil {
return nil, err
}
sentinelConfFilepath := filepath.Join(dir, "sentinel.conf")
tpl, err := template.New("sentinel.conf").Parse(sentinelConf)
if err != nil {
return nil, err
}
data := struct {
Port string
MasterName string
MasterPort string
}{
Port: port,
MasterName: masterName,
MasterPort: masterPort,
}
if err := writeTemplateToFile(sentinelConfFilepath, tpl, data); err != nil {
return nil, err
}
cmd := exec.Command("redis-server", sentinelConfFilepath, "--sentinel")
if true {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
}
if err := cmd.Start(); err != nil {
return nil, err
}
return cmd, nil
}
func writeTemplateToFile(path string, t *template.Template, data interface{}) error {
f, err := os.Create(path)
if err != nil {
return err
}
defer f.Close()
return t.Execute(f, data)
}
func TestSentinel(t *testing.T) {
masterName := "mymaster"
masterPort := "8123"
slavePort := "8124"
sentinelPort := "8125"
masterCmd, err := startRedis(masterPort)
if err != nil {
t.Fatal(err)
}
defer masterCmd.Process.Kill()
// Wait for master to start.
time.Sleep(200 * time.Millisecond)
master := redis.NewTCPClient(&redis.Options{
Addr: ":" + masterPort,
})
if err := master.Ping().Err(); err != nil {
t.Fatal(err)
}
slaveCmd, err := startRedisSlave(slavePort, masterPort)
if err != nil {
t.Fatal(err)
}
defer slaveCmd.Process.Kill()
// Wait for slave to start.
time.Sleep(200 * time.Millisecond)
slave := redis.NewTCPClient(&redis.Options{
Addr: ":" + slavePort,
})
if err := slave.Ping().Err(); err != nil {
t.Fatal(err)
}
sentinelCmd, err := startRedisSentinel(sentinelPort, masterName, masterPort)
if err != nil {
t.Fatal(err)
}
defer sentinelCmd.Process.Kill()
// Wait for sentinel to start.
time.Sleep(200 * time.Millisecond)
sentinel := redis.NewTCPClient(&redis.Options{
Addr: ":" + sentinelPort,
})
if err := sentinel.Ping().Err(); err != nil {
t.Fatal(err)
}
defer sentinel.Shutdown()
client := redis.NewFailoverClient(&redis.FailoverOptions{
MasterName: masterName,
SentinelAddrs: []string{":" + sentinelPort},
})
if err := client.Set("foo", "master").Err(); err != nil {
t.Fatal(err)
}
val, err := master.Get("foo").Result()
if err != nil {
t.Fatal(err)
}
if val != "master" {
t.Fatalf(`got %q, expected "master"`, val)
}
// Kill Redis master.
if err := masterCmd.Process.Kill(); err != nil {
t.Fatal(err)
}
if err := master.Ping().Err(); err == nil {
t.Fatalf("master was not killed")
}
// Wait for Redis sentinel to elect new master.
time.Sleep(5 * time.Second)
// Check that client picked up new master.
val, err = client.Get("foo").Result()
if err != nil {
t.Fatal(err)
}
if val != "master" {
t.Fatalf(`got %q, expected "master"`, val)
}
}
var sentinelConf = `
port {{ .Port }}
sentinel monitor {{ .MasterName }} 127.0.0.1 {{ .MasterPort }} 1
sentinel down-after-milliseconds {{ .MasterName }} 1000
sentinel failover-timeout {{ .MasterName }} 2000
sentinel parallel-syncs {{ .MasterName }} 1
`
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