+apache_restarter

apache_restarter/apache_restarter.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+import logging
+import os
+import sys
+import time
+
+delay = 2
+
+
+def restart_apache():
+    os.system("systemctl reload-or-restart apache2")
+
+
+def run_monitor(filename):
+    while True:
+        if os.path.exists(filename):
+            logging.info("restarting apache")
+            restart_apache()
+            time.sleep(delay)
+            os.remove(filename)
+        time.sleep(delay)
+
+
+def main():
+    logging.basicConfig(level=logging.INFO, format='%(asctime)s: %(message)s')
+    if len(sys.argv) < 2:
+        raise Exception('No monitor filename')
+    monitor_filename = sys.argv[1]
+    monitor_dir = os.path.dirname(monitor_filename)
+    if not os.path.isdir(monitor_dir):
+        raise Exception(f'directory not exist: {monitor_dir}')
+    if not os.access(monitor_dir, os.W_OK):
+        raise Exception(f'directory not writable: {monitor_dir}')
+    run_monitor(monitor_filename)
+
+
+if __name__ == "__main__":
+    main()

apache_restarter/apache_restarter.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Apache restart monitor
+After=apache2.service
+Wants=apache2.service
+
+[Service]
+ExecStart=/usr/bin/env python3 /path/apache_restarter.py /run/apache_restart/apache_restart
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=always
+RestartSec=2s
+
+[Install]
+WantedBy=multi-user.target