func Start() {
if !g.Config().Http.Enabled {
return
}
addr := g.Config().Http.Listen
if addr == "" {
return
}
s := &http.Server{
Addr: addr,
MaxHeaderBytes: 1 << 30,
}
log.Println("http listening", addr)
log.Fatalln(s.ListenAndServe())
}
func Heartbeat() {
SleepRandomDuration()
for {
heartbeat()
d := time.Duration(g.Config().Interval) * time.Second
time.Sleep(d)
}
}
func SleepRandomDuration() {
ns := int64(g.Config().Interval) * 1000000000
// 以当前时间为随机数种子，如果所有ops-updater在同一时间启动，系统时间是相同的，那么随机种子就是一样的
// 问题不大，批量ssh去启动ops-updater的话也是一个顺次的过程
r := rand.New(rand.NewSource(time.Now().UnixNano()))
d := time.Duration(r.Int63n(ns)) * time.Nanosecond
time.Sleep(d)
}
func heartbeat() {
hostname, err := utils.Hostname(g.Config().Hostname)
if err != nil {
return
}
desiredAgents := ReadDesiredAgents()
heartbeatRequest := BuildHeartbeatRequest(hostname, desiredAgents)
logger.Debugln("===>>>", heartbeatRequest)
bs, err := json.Marshal(heartbeatRequest)
if err != nil {
logger.Errorln("encode heartbeat request fail", err)
return
}
url := fmt.Sprintf("http://%s/api/heartbeat", g.Config().Server)
httpRequest := httplib.Post(url).SetTimeout(time.Second*10, time.Minute)
httpRequest.Body(bs)
httpResponse, err := httpRequest.Bytes()
if err != nil {
log.Printf("curl %s fail %v", url, err)
return
}
var heartbeatResponse model.HeartbeatResponse
err = json.Unmarshal(httpResponse, &heartbeatResponse)
if err != nil {
logger.Errorln("decode heartbeat response fail", err)
return
}
logger.Debugln("<<<<====", heartbeatResponse)
HandleHeartbeatResponse(&heartbeatResponse, desiredAgents)
}
func configCommonRoutes() {
http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("ok"))
})
http.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(g.VERSION))
})
http.HandleFunc("/workdir", func(w http.ResponseWriter, r *http.Request) {
RenderDataJson(w, file.SelfDir())
})
http.HandleFunc("/config/reload", func(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.RemoteAddr, "127.0.0.1") {
err := g.ParseConfig(g.ConfigFile)
AutoRender(w, g.Config(), err)
} else {
w.Write([]byte("no privilege"))
}
})
}
func main() {
cfg := flag.String("c", "cfg.json", "configuration file")
version := flag.Bool("v", false, "show version")
flag.Parse()
if *version {
fmt.Println(g.VERSION)
os.Exit(0)
}
if err := g.ParseConfig(*cfg); err != nil {
log.Fatalln(err)
}
g.InitGlobalVariables()
logger.SetLevelWithDefault(g.Config().LogLevel, "info")
CheckDependency()
go http.Start()
go cron.Heartbeat()
select {}
}