func (s *ManagerTestSuite) TestStartService(t *C) {
// Make and start a qan.Manager with mock factories, no analyzer yet.
mockConnFactory := &mock.ConnectionFactory{Conn: s.nullmysql}
a := mock.NewQanAnalyzer()
f := mock.NewQanAnalyzerFactory(a)
m := qan.NewManager(s.logger, s.clock, s.im, s.mrmsMonitor, mockConnFactory, f)
t.Assert(m, NotNil)
err := m.Start()
t.Check(err, IsNil)
test.WaitStatus(1, m, "qan", "Running")
// Create the qan config.
config := &qan.Config{
ServiceInstance: s.mysqlInstance,
Start: []mysql.Query{
mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
mysql.Query{Set: "SET GLOBAL long_query_time=0.123"},
mysql.Query{Set: "SET GLOBAL slow_query_log=ON"},
},
Stop: []mysql.Query{
mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
mysql.Query{Set: "SET GLOBAL long_query_time=10"},
},
Interval: 300, // 5 min
MaxSlowLogSize: 1073741824, // 1 GiB
RemoveOldSlowLogs: true,
ExampleQueries: true,
MaxWorkers: 2,
WorkerRunTime: 600, // 10 min
CollectFrom: "slowlog",
}
// Send a StartService cmd with the qan config to start an analyzer.
now := time.Now()
qanConfig, _ := json.Marshal(config)
cmd := &proto.Cmd{
User: "******",
Ts: now,
AgentUuid: "123",
Service: "agent",
Cmd: "StartService",
Data: qanConfig,
}
reply := m.Handle(cmd)
t.Assert(reply.Error, Equals, "")
// The manager writes the qan config to disk.
data, err := ioutil.ReadFile(pct.Basedir.ConfigFile("qan"))
t.Check(err, IsNil)
gotConfig := &qan.Config{}
err = json.Unmarshal(data, gotConfig)
t.Check(err, IsNil)
if same, diff := IsDeeply(gotConfig, config); !same {
Dump(gotConfig)
t.Error(diff)
}
// Now the manager and analyzer should be running.
status := m.Status()
t.Check(status["qan"], Equals, "Running")
t.Check(status["qan-analyzer"], Equals, "ok")
// Try to start the same analyzer again. It results in an error because
// double tooling is not allowed.
reply = m.Handle(cmd)
t.Check(reply.Error, Equals, "qan-analyzer service is running")
// Send a StopService cmd to stop the analyzer.
// todo-1.1: send Data with analyzer instance to stop.
now = time.Now()
cmd = &proto.Cmd{
User: "******",
Ts: now,
AgentUuid: "123",
Service: "qan",
Cmd: "StopService",
}
reply = m.Handle(cmd)
t.Assert(reply.Error, Equals, "")
// Now the manager is still running, but the analyzer is not.
status = m.Status()
t.Check(status["qan"], Equals, "Running")
// And the manager has removed the qan config from disk so next time
// the agent starts the analyzer is not started.
t.Check(test.FileExists(pct.Basedir.ConfigFile("qan")), Equals, false)
// StopService should be idempotent, so send it again and expect no error.
reply = m.Handle(cmd)
t.Assert(reply.Error, Equals, "")
// Stop the manager.
err = m.Stop()
t.Assert(err, IsNil)
}
func (s *ManagerTestSuite) TestStartWithConfig(t *C) {
for _, analyzerType := range []string{"slowlog", "perfschema"} {
// Make a qan.Manager with mock factories.
mockConnFactory := &mock.ConnectionFactory{Conn: s.nullmysql}
a := mock.NewQanAnalyzer()
f := mock.NewQanAnalyzerFactory(a)
m := qan.NewManager(s.logger, s.clock, s.im, s.mrmsMonitor, mockConnFactory, f)
t.Assert(m, NotNil)
// Write a realistic qan.conf config to disk.
config := qan.Config{
ServiceInstance: s.mysqlInstance,
CollectFrom: analyzerType,
Interval: 300,
MaxWorkers: 1,
WorkerRunTime: 600,
Start: []mysql.Query{
mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
mysql.Query{Set: "SET GLOBAL long_query_time=0.456"},
mysql.Query{Set: "SET GLOBAL slow_query_log=ON"},
},
Stop: []mysql.Query{
mysql.Query{Set: "SET GLOBAL slow_query_log=OFF"},
mysql.Query{Set: "SET GLOBAL long_query_time=10"},
},
}
err := pct.Basedir.WriteConfig("qan", &config)
t.Assert(err, IsNil)
// qan.Start() reads qan.conf from disk and starts an analyzer for it.
err = m.Start()
t.Check(err, IsNil)
// Wait until qan.Start() calls analyzer.Start().
if !test.WaitState(a.StartChan) {
t.Fatal("Timeout waiting for <-a.StartChan")
}
// After starting, the manager's status should be Running and the analyzer's
// status should be reported too.
status := m.Status()
t.Check(status["qan"], Equals, "Running")
t.Check(status["qan-analyzer"], Equals, "ok")
// Check the args passed by the manager to the analyzer factory.
if len(f.Args) == 0 {
t.Error("len(f.Args) == 0, expected 1")
} else {
t.Check(f.Args, HasLen, 1)
t.Check(f.Args[0].Config, DeepEquals, config)
t.Check(f.Args[0].Name, Equals, "qan-analyzer")
}
// qan.Stop() stops the analyzer and leaves qan.conf on disk.
err = m.Stop()
t.Assert(err, IsNil)
// Wait until qan.Stop() calls analyzer.Stop().
if !test.WaitState(a.StopChan) {
t.Fatal("Timeout waiting for <-a.StopChan")
}
// qan.conf still exists after qan.Stop().
t.Check(test.FileExists(pct.Basedir.ConfigFile("qan")), Equals, true)
// The analyzer is no longer reported in the status because it was stopped
// and removed when the manager was stopped.
status = m.Status()
t.Check(status["qan"], Equals, "Stopped")
}
}