Heartbeats from remote servers can provide rapid alerting particularly over VPN tunnels

Requirements:

• Redis on monitoring server or on local server reachable by remote server
• Python3 on monitoring server as well as remote server

Components:

heartbeat_listener:

• Listens to heartbeats and sends them to the monitoring server

heartbeat_sender:

• Sends heartbeats to Redis on the monitoring server

Installation:

• Install redis
• Install python module dependencies: pip install -r requirements.txt
• Customize heartbeat_listener.yaml and place on monitoring server
• Customize heartbeat_sender.yaml and place on remote server
• Run sender in the background on the remote server (supervisor?): python3 heartbeat_sender.py
• Run listener in the background on the local server (supervisor?): python3 heartbeat_listener.py
• Add a service with passive checks in Nagios and make sure to have that match your heartbeat_listener.yaml configuration heartbeat_host and heartbeat_service