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Kamal needs images to have the service label so it can track them for pruning. Images built by Kamal will have the label, but externally built ones may not. Without it images will build up over time. The worst case is an outage if all the hosts disks fill up at the same time. We'll add a check for the label and halt if it is not there.
Kamal: Deploy web apps anywhere
From bare metal to cloud VMs using Docker, deploy web apps anywhere with zero downtime. Kamal uses the dynamic reverse-proxy Traefik to hold requests, while the new app container is started and the old one is stopped — working seamlessly across multiple hosts, using SSHKit to execute commands. Originally built for Rails apps, Kamal will work with any type of web app that can be containerized with Docker.
➡️ See kamal-deploy.org for documentation on installation, configuration, and commands.
Contributing to the documentation
Please help us improve Kamal's documentation on the the basecamp/kamal-site repository.
License
Kamal is released under the MIT License.