Add missing grid_janitor daemon and fix copyritgh header.

Author: jonasbardino

mig/server/grid_janitor.py

@@ -0,0 +1,110 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# --- BEGIN_HEADER ---
+#
+# grid_janitor - daemon to handle recurring tasks like clean up and updates
+# Copyright (C) 2003-2025  The MiG Project by the Science HPC Center at UCPH
+#
+# This file is part of MiG.
+#
+# MiG is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# MiG is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# -- END_HEADER ---
+#
+
+"""Daemon to take care of various recurring tasks like clean up, cache updates
+and pruning of pending requests.
+"""
+
+from __future__ import absolute_import, print_function
+
+import multiprocessing
+import os
+import signal
+import sys
+import time
+
+from mig.shared.conf import get_configuration_object
+from mig.shared.logger import daemon_logger, register_hangup_handler
+
+stop_running = multiprocessing.Event()
+(configuration, logger) = (None, None)
+
+
+def stop_handler(sig, frame):
+    """A simple signal handler to quit on Ctrl+C (SIGINT) in main"""
+    # Print blank line to avoid mix with Ctrl-C line
+    print("")
+    stop_running.set()
+
+
+if __name__ == "__main__":
+    # Force no log init since we use separate logger
+    configuration = get_configuration_object(skip_log=True)
+
+    log_level = configuration.loglevel
+    if sys.argv[1:] and sys.argv[1] in ["debug", "info", "warning", "error"]:
+        log_level = sys.argv[1]
+
+    # Use separate logger
+
+    logger = daemon_logger("janitor", configuration.user_janitor_log, log_level)
+    configuration.logger = logger
+
+    # Allow e.g. logrotate to force log re-open after rotates
+    register_hangup_handler(configuration)
+
+    # Allow clean shutdown on SIGINT only to main process
+    signal.signal(signal.SIGINT, stop_handler)
+
+    if not configuration.site_enable_janitor:
+        err_msg = "Janitor support is disabled in configuration!"
+        logger.error(err_msg)
+        print(err_msg)
+        sys.exit(1)
+
+    print(
+        """This is the MiG janitor daemon which cleans up stale state data,
+updates internal caches and prunes pending requests.
+
+Set the MIG_CONF environment to the server configuration path
+unless it is available in mig/server/MiGserver.conf
+"""
+    )
+
+    main_pid = os.getpid()
+    print("Starting janitor daemon - Ctrl-C to quit")
+    logger.info("(%s) Starting Janitor daemon" % main_pid)
+
+    logger.debug("(%s) Starting main loop" % main_pid)
+    print("%s: Start main loop" % os.getpid())
+    while not stop_running.is_set():
+        try:
+            time.sleep(1)
+        except KeyboardInterrupt:
+            stop_running.set()
+            # NOTE: we can't be sure if SIGINT was sent to only main process
+            #       so we make sure to propagate to monitor child
+            print("Interrupt requested - shutdown")
+        except Exception as exc:
+            logger.error(
+                "(%s) Caught unexpected exception: %s" % (os.getpid(), exc)
+            )
+
+    print("Janitor daemon shutting down")
+    logger.info("(%s) Janitor daemon shutting down" % main_pid)
+
+    sys.exit(0)