watchdog.py 文件源码

def startService(self):
        Service.startService(self)
        bootstrap_list.bootstrap(data_path=self._config.data_path,
                                 log_dir=self._config.log_dir)
        if self._config.clones > 0:

            # Let clones open an appropriate number of fds
            setrlimit(RLIMIT_NOFILE, (self._config.clones * 100,
                                      self._config.clones * 200))

            # Increase the timeout of AMP's MethodCalls.
            # XXX: we should find a better way to expose this knot, and
            # not set it globally on the class
            from landscape.lib.amp import MethodCallSender
            MethodCallSender.timeout = 300

            # Create clones log and data directories
            for i in range(self._config.clones):
                suffix = "-clone-%d" % i
                bootstrap_list.bootstrap(
                    data_path=self._config.data_path + suffix,
                    log_dir=self._config.log_dir + suffix)

        result = succeed(None)
        result.addCallback(lambda _: self.watchdog.check_running())

        def start_if_not_running(running_daemons):
            if running_daemons:
                error("ERROR: The following daemons are already running: %s"
                      % (", ".join(x.program for x in running_daemons)))
                self.exit_code = 1
                reactor.crash()  # so stopService isn't called.
                return
            self._daemonize()
            info("Watchdog watching for daemons.")
            return self.watchdog.start()

        def die(failure):
            log_failure(failure, "Unknown error occurred!")
            self.exit_code = 2
            reactor.crash()
        result.addCallback(start_if_not_running)
        result.addErrback(die)
        return result