services/git-monitor

@@ -6,6 +6,7 @@ REPO_LOCAL_PATH="/opt/src"
 BRANCH_NAME="develop"
 POLL_INTERVAL=60  # Seconds between checks
 #LOG_FILE="/var/log/git-monitor.log" # Log file for recording actions
+LOCK_FILE="/run/lock/git-monitor.lock" # File to prevent multiple instances
 IFS="|"
 
 # Functions
@@ -17,6 +18,21 @@ log_message() {
   echo "$timestamp [$level] $message"  # Also print to console (optional)
 }
 
+check_lock() {
+  if [ -f "$LOCK_FILE" ]; then
+    log_message "WARN" "Another instance is already running. Exiting."
+    exit 1
+  fi
+}
+
+create_lock() {
+  touch "$LOCK_FILE"
+}
+
+remove_lock() {
+  rm -f "$LOCK_FILE"
+}
+
 run_after() {
   local after_pull_script=$1
   source $after_pull_script
@@ -68,6 +84,12 @@ check_for_updates() {
 }
 
 # Main Execution
+
+trap 'remove_lock' EXIT
+
+check_lock
+create_lock
+
 log_message "INFO" "Git monitor started."
 
 initialize_repos
@@ -81,3 +103,5 @@ while true; do
   done < $REPO_URLS
   sleep "$POLL_INTERVAL"
 done
+
+remove_lock # This won't be reached in this infinite loop.  Useful if exiting gracefully.

units/git-monitor.service

@@ -4,9 +4,7 @@ After=network.target
 
 [Service]
 ExecStart=/usr/local/bin/git-monitor
-LockFile=/run/lock/git-monitor-lock
 Restart=on-failure
-RemovalPolicy=onFailure
 User=monitor
 WorkingDirectory=/opt/src