infosave2007
58 lines
1.7 KiB
Bash
Executable File
58 lines
1.7 KiB
Bash
Executable File
#!/bin/bash
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# Monitor and restart metrics collector if it's not running
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# This script checks if collect_metrics.php is running and restarts it if needed
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# Uses flock to prevent multiple instances (#42)
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SCRIPT_PATH="/var/www/html/bin/collect_metrics.php"
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LOG_FILE="/var/log/metrics_monitor.log"
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PID_FILE="/var/run/collect_metrics.pid"
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LOCK_FILE="/var/run/collect_metrics.lock"
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log_message() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"
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}
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# Use flock to prevent multiple monitor instances
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exec 200>"$LOCK_FILE"
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if ! flock -n 200; then
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log_message "Another monitor instance is running, exiting"
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exit 0
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fi
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# Check if the process is running
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is_running() {
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if [ -f "$PID_FILE" ]; then
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PID=$(cat "$PID_FILE")
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if ps -p "$PID" > /dev/null 2>&1; then
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# Check if it's actually our script
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if ps -p "$PID" -o args= | grep -q "collect_metrics.php"; then
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return 0
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fi
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fi
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fi
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# Also check if any collect_metrics.php is running (catches orphan processes)
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if pgrep -f "collect_metrics.php" > /dev/null 2>&1; then
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# Update PID file with actual PID
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pgrep -f "collect_metrics.php" | head -1 > "$PID_FILE"
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return 0
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fi
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return 1
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}
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# Start the metrics collector
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start_collector() {
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log_message "Starting metrics collector..."
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/usr/local/bin/php "$SCRIPT_PATH" >> /var/log/metrics_collector.log 2>&1 &
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echo $! > "$PID_FILE"
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log_message "Metrics collector started with PID: $(cat $PID_FILE)"
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}
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# Main logic
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if is_running; then
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log_message "Metrics collector is running (PID: $(cat $PID_FILE))"
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else
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log_message "Metrics collector is not running - starting it"
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start_collector
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fi
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