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Checks if the job is not disabled before running it. :param cfg: UAConfig instance :return: A bool True when successfully run. False if ignored or in error. """ if not self._should_run(cfg): return False try: LOG.debug("Running job: %s", self.name) if self._job_func(cfg=cfg): LOG.debug("Executed job: %s", self.name) except Exception as e: LOG.error("Error executing job %s: %s", self.name, str(e)) return False return True def run_interval_seconds(self, cfg: UAConfig) -> int: """Return the run_interval for the job based on config or defaults.""" configured_interval = getattr(cfg, "{}_timer".format(self.name), None) if configured_interval is None: return self._default_interval_seconds if not isinstance(configured_interval, int) or configured_interval < 0: warning_msg = ( "Invalid value for {} interval found in config. " "Default value will be used." ).format(self.name) LOG.warning(warning_msg) return self._default_interval_seconds return configured_interval def _should_run(self, cfg) -> bool: """Verify if the job has a valid (non-zero) interval.""" return self.run_interval_seconds(cfg) != 0 class MeteringTimedJob(TimedJob): def __init__( self, job_func: Callable[..., bool], default_interval_seconds: int ): super().__init__( name="metering", job_func=job_func, default_interval_seconds=default_interval_seconds, ) def run_interval_seconds(self, cfg: UAConfig) -> int: """ Define the run interval for the metering job. The contract server can control the time we should make the request again. Since the user can also configure the timer interval for this job, we will select the greater value between those two choices. """ run_interval_seconds = super().run_interval_seconds(cfg) if run_interval_seconds == 0: # If the user has disabled the metering job, we should # ignore the activity_ping_interval directive return 0 return max( cfg.machine_token_file.activity_ping_interval or 0, super().run_interval_seconds(cfg), ) metering_job = MeteringTimedJob(metering_enabled_resources, METERING_INTERVAL) update_message_job = TimedJob( "update_messaging", update_apt_and_motd_messages, UPDATE_MESSAGING_INTERVAL, ) def run_job( cfg: UAConfig, job: TimedJob, current_time: datetime, job_status: Optional[TimerJobState], ) -> Optional[TimerJobState]: if job_status: next_run = job_status.next_run if next_run and next_run > current_time: return job_status if job.run(cfg): # Persist last_run and next_run UTC-based times on job success. last_run = current_time next_run = current_time + timedelta( seconds=job.run_interval_seconds(cfg) ) job_status = TimerJobState(next_run=next_run, last_run=last_run) return job_status def run_jobs(cfg: UAConfig, current_time: datetime): """Run jobs in order when next_run is before current_time. Persist jobs-status with calculated next_run values to aid in timer state introspection for jobs which have not yet run. """ jobs_status_obj = None # If the file format is wrong we remove it, and after the jobs are # executed it will be recreated with the proper data. try: jobs_status_obj = timer_jobs_state_file.read() except InvalidFileFormatError: try: timer_jobs_state_file.delete() except (OSError, PermissionError) as exception: msg = "Error trying to delete invalid jobs-status.json file: {}" msg = msg.format(str(exception)) LOG.warning(msg) return if jobs_status_obj is None: # We do this for the first run of the timer job, where the file # doesn't exist jobs_status_obj = AllTimerJobsState( metering=None, update_messaging=None ) jobs_status_obj.metering = run_job( cfg, metering_job, current_time, jobs_status_obj.metering ) jobs_status_obj.update_messaging = run_job( cfg, update_message_job, current_time, jobs_status_obj.update_messaging ) timer_jobs_state_file.write(jobs_status_obj) if __name__ == "__main__": cfg = UAConfig(root_mode=True) current_time = datetime.now(timezone.utc) # The ua-timer logger should log everything to its file setup_logging( logging.CRITICAL, logging.DEBUG, log_file=cfg.timer_log_file, logger=LOG, ) # Make sure the ua-timer logger does not generate double logging LOG.propagate = False # The root logger should log any error to the timer log file setup_logging(logging.CRITICAL, logging.ERROR, log_file=cfg.timer_log_file) run_jobs(cfg=cfg, current_time=current_time)