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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| package app | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "github.com/golang/glog" | ||
| "io/fs" | ||
| "net" | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "strconv" | ||
| "strings" | ||
| "syscall" | ||
| ) | ||
|
|
||
| type ( | ||
| ConnectInfo struct { | ||
| Listener string | ||
| ZoneId int | ||
| MachineIndex int | ||
| } | ||
| ChildInfo struct { | ||
| Id int | ||
| Cmd *exec.Cmd | ||
| } | ||
| ServerManager struct { | ||
| //monitoring *httpMonitoringT | ||
|
|
||
| connectInfo []ConnectInfo | ||
| pidFileName string | ||
| cmdPath string | ||
| cmdArgs []string | ||
| numChildren int | ||
| pidMap map[int]ChildInfo | ||
| doneCh chan struct{} | ||
| deadCh chan int | ||
| stopping bool | ||
| procCreateItvlBase int | ||
| procCreateItvlMax int | ||
| lruCacheSizeInMB int | ||
| dbScanPort int | ||
| cloudEnabled bool | ||
| } | ||
| ) | ||
|
|
||
| func NewServerManager(num int, pidFileName string, path string, args []string, | ||
| connInfo []ConnectInfo, httpMonAddr string, dbScanPort int, cloudEnabled bool) *ServerManager { | ||
| s := &ServerManager{ | ||
| connectInfo: connInfo, | ||
| pidFileName: pidFileName, | ||
| cmdPath: path, | ||
| cmdArgs: args, | ||
| numChildren: num, | ||
| pidMap: make(map[int]ChildInfo), | ||
| doneCh: make(chan struct{}), | ||
| deadCh: make(chan int, num), | ||
| stopping: false, | ||
| procCreateItvlBase: 100, | ||
| procCreateItvlMax: 20000, | ||
| // For rocksdb. min(10% * mem / num_of_db_instances, 3072) | ||
| //lruCacheSizeInMB: int(math.Min(float64(util.GetTotalMemMB()/(10*num)), 3072)), | ||
| dbScanPort: dbScanPort, | ||
| cloudEnabled: cloudEnabled, | ||
| } | ||
| if len(httpMonAddr) != 0 { ///TODO validate addr? | ||
| for i := 0; i < s.numChildren; i++ { | ||
| if ln, err := net.Listen("tcp", "127.0.0.1:0"); err == nil { | ||
| //s.monitoring.listeners[i] = ln | ||
| //s.monitoring.lsnrFiles[i], _ = ln.(*net.TCPListener).File() | ||
| glog.Infof("monitoring listener (%s) created for worker %d", ln.Addr(), i) | ||
|
|
||
| } else { | ||
| glog.Errorf("fail to create listeners for monitoring") | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return s | ||
| } | ||
|
|
||
| func (s *ServerManager) Run() { | ||
| pidFile := s.pidFileName | ||
|
|
||
| if data, err := os.ReadFile(pidFile); err == nil { | ||
| if pid, err := strconv.Atoi(strings.TrimSpace(string(data))); err == nil { | ||
| if process, err := os.FindProcess(pid); err == nil { | ||
| if err := process.Signal(syscall.Signal(0)); err == nil { | ||
| fmt.Fprintf(os.Stderr, "process pid: %d in %s is still running\n", pid, pidFile) | ||
| ///TODO check if it is storageserv process | ||
| os.Exit(-1) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if s.dbScanPort > 0 { | ||
| cmdPath := fmt.Sprintf("%s/%s", filepath.Dir(s.cmdPath), "dbscanserv") | ||
| _, err := os.Stat(cmdPath) | ||
| if errors.Is(err, fs.ErrNotExist) { | ||
| glog.Exitf("missing executable file: dbscanserv.") | ||
| } | ||
| } | ||
|
|
||
| os.WriteFile(pidFile, []byte(fmt.Sprintf("%d\n", os.Getpid())), 0644) | ||
| defer os.Remove(pidFile) | ||
| //defer shmstats.Finalize() | ||
|
|
||
| //if err := shmstats.InitForManager(s.numChildren); err != nil { | ||
| // glog.Error(err.Error()) | ||
| // return | ||
| //} | ||
|
|
||
| //s.handleSignals() | ||
|
|
||
| hostName, err := os.Hostname() | ||
| spawn := true | ||
| if err == nil && s.cloudEnabled { | ||
| shutdownList := fmt.Sprintf(" %s ", os.Getenv("SHUTDOWN_LIST")) | ||
| name := fmt.Sprintf(" %s ", hostName) | ||
| glog.Infof("host=%s shutdownList=%s", hostName, shutdownList) | ||
| if strings.Contains(shutdownList, " all ") || strings.Contains(shutdownList, name) { | ||
| glog.Infof("Skip starting workers on:%s", shutdownList) | ||
| spawn = false | ||
| } | ||
| } | ||
| if spawn { | ||
| s.spawnChildren() | ||
| } | ||
|
|
||
| Loop: | ||
| for { | ||
| select { | ||
| case pid := <-s.deadCh: | ||
| s.handleDeadChild(pid) | ||
| case <-s.doneCh: | ||
| //s.shutdown() | ||
| break Loop | ||
| } | ||
| } | ||
| } | ||
| func (s *ServerManager) spawnChildren() { | ||
| for i := 0; i < s.numChildren; i++ { | ||
| s.spawnOneChild(i) | ||
| } | ||
| if s.dbScanPort > 0 { | ||
| s.spawnDbScanChild() | ||
| } | ||
| } | ||
|
|
||
| func (s *ServerManager) spawnDbScanChild() { | ||
|
|
||
| cmdPath := fmt.Sprintf("%s/%s", filepath.Dir(s.cmdPath), "dbscanserv") | ||
|
|
||
| var argConfig string | ||
| for _, val := range s.cmdArgs { | ||
| if strings.Index(val, "-config") == 0 || strings.Index(val, "-c") == 0 { | ||
| argConfig = val | ||
| break | ||
| } | ||
| } | ||
| glog.Infof("%s %s", s.cmdPath, argConfig) | ||
| cmd := exec.Command(cmdPath, argConfig) | ||
|
|
||
| cmd.Stdout = os.Stdout | ||
| cmd.Stderr = os.Stderr | ||
|
|
||
| err := cmd.Start() | ||
| if err != nil { | ||
| glog.Fatalf("Failed to launch child process, error: %v", err) | ||
| } | ||
|
|
||
| // save the cmd for later | ||
| s.pidMap[cmd.Process.Pid] = ChildInfo{-2, cmd} | ||
|
|
||
| } | ||
| func (s *ServerManager) spawnOneChild(i int) { | ||
|
|
||
| } | ||
| func (s *ServerManager) handleDeadChild(pid int) { | ||
| } |
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