Category: docker

cloudflared docker health check

Cloudflare's cloudflared container doesn't come with a good health check - or so it seems [1]. The functionality is there, though. The tunnel needs to be started with metrics enabled (here: exposed to 127.0.0.1:20241) and the health check needs to call the proper check. cloudflared: image: cloudflare/cloudflared:latest ... command: tunnel --metrics 127.0.0.1:20241 run healthcheck: test: … Continue reading cloudflared docker health check →

docker-proxy port in use

Quick one: you're starting a container through docker-compose and it says a port is in use. You "netstat -plutn" it and find out, that port is in use by docker-proxy. Github user rdavaillaud knows what's going on: stop dockerremove all internal docker network: rm /var/lib/docker/network/files/start docker

Rebuilding single services in docker-compose

Note to self: a single service ("container") out of a docker-compose.yaml file is rebuilt and restarted like this: docker-compose create container_name   While this complains about deprecations, there is another way. Let's say we want to re-create a container called "web" belonging to a composition: # stop container docker-compose stop web # optionally destroy container. … Continue reading Rebuilding single services in docker-compose →

Monitoring for the private Docker cloud project

A few days ago I blogged about my holiday project (Building a private cloud with Docker [1]) which is just a proof of concept as it lacks important features. One of them is monitoring which is a tough topic in cluster environments. There are a few open source, free to use monitoring solutions for Docker … Continue reading Monitoring for the private Docker cloud project →