This is a very hacky script for monitoring cloudflared, it requires curl and jq, which I think you should have on there anyway
You need the following line in the config.yml file, which sets cloudflared to expose the metrics/monitoring endpoint, or --metrics localhost:40355 on the command line:
metrics: localhost:40355
And… here’s the script. TL;DR, it checks the /ready endpoint, which returns {"status":200,"readyConnections":4} on good, or a 503 on not-working.
#!/bin/bash
SYSTEMD_TOPIC="cloudflared_monitoring"
METRICS_PORT="40355"
CLOUDFLARED_STATUS="$( curl --silent --max-time 5 "http://localhost:${METRICS_PORT}/ready" | jq -r '.status' )"
if [ "$CLOUDFLARED_STATUS" -ne 200 ]; then
echo "cloudflared status: ${CLOUDFLARED_STATUS} restarting." | /usr/bin/systemd-cat -t "${SYSTEMD_TOPIC}"
/bin/systemctl restart cloudflared 2>&1 | sudo /usr/bin/systemd-cat -t "${SYSTEMD_TOPIC}"
else
echo "cloudflared status: ${CLOUDFLARED_STATUS} OK" | /usr/bin/systemd-cat -t "${SYSTEMD_TOPIC}"
fi
References
- Found the information in cloudflare/cloudflared#188.
- Committed to the cloudflared repo in 38fb0b28b.
- Argo command line option reference
