HealthChecks.io

Create a new check

Healthchecks.io – Cron Job MonitoringHealthchecks.io

• These settings allow for a system restart without triggering the alerts

• Period:

  • 5 minutes

  • The expected time between pings

• Grace Time:

  • 10 minutes

  • When a check is late, how long to wait to send an alert

Bash script

Used to monitor if Prometheus and Alertmanager are running, and if the entire machine is offline or unresponsive.

sudo vim /etc/default/healthchecks.sh

• Edit UNIQUE_ID

#!/bin/bash

# Healthchecks.io URL
# ***********
# CHANGE HERE
# ↓↓↓↓↓↓↓↓↓↓↓
healthchecks_io_url="https://hc-ping.com/<UNIQUE_ID>"

# URLs for the health endpoints of Prometheus and Alertmanager
prometheus_health_url="http://localhost:9090/-/healthy"
alertmanager_health_url="http://localhost:9093/-/healthy"

# Check health of Prometheus
if curl -f ${prometheus_health_url}; then
  # Check health of Alertmanager
  if curl -f ${alertmanager_health_url}; then
    # Send heartbeat to Healthchecks.io
    curl -fsS --retry 3 ${healthchecks_io_url} > /dev/null
  else
    echo "Alertmanager is not healthy."
  fi
else
  echo "Prometheus is not healthy."
fi

sudo chmod u+x /etc/default/healthchecks.sh

Configure CRON

• Run every 1 minute.

sudo crontab -e

* * * * * /etc/default/healthchecks.sh

Integrations

Integrates with PagerDuty for alerts.