#!/bin/bash
# Handle Keepalived state changes
# This script should be deployed to /usr/local/bin/keepalived-notify.sh on Proxmox hosts

set -euo pipefail

STATE="${1:-unknown}"
LOGFILE="/var/log/keepalived-notify.log"
TIMESTAMP=$(date '+%Y-%m-%d %H:%M:%S')
VIP="${VIP:-192.168.11.166}"

# Ensure log directory exists
mkdir -p "$(dirname "$LOGFILE")"

case "$STATE" in
    "master")
        echo "[$TIMESTAMP] Transitioned to MASTER - This node now owns VIP $VIP" >> "$LOGFILE"
        # Optionally: Start services, send alerts, etc.
        # Example: Send alert
        # echo "NPMplus HA: Node $(hostname) is now MASTER" | mail -s "NPMplus HA Master" admin@example.com
        ;;
    "backup")
        echo "[$TIMESTAMP] Transitioned to BACKUP - Standby mode" >> "$LOGFILE"
        ;;
    "fault")
        echo "[$TIMESTAMP] Transitioned to FAULT - Health check failed" >> "$LOGFILE"
        # Optionally: Send critical alerts
        # echo "NPMplus HA: Node $(hostname) is in FAULT state!" | mail -s "NPMplus HA Fault" admin@example.com
        ;;
    *)
        echo "[$TIMESTAMP] Unknown state: $STATE" >> "$LOGFILE"
        ;;
esac