If you’re looking for a self-hosted OSS free CI, this may give you some tips.

Requirements:

• Needs to be self-hosted, open-source and free
• Should use as few RAM as possible
• Should be able to periodically poll git repo

Evaluated CIs from awesome-ci:

• Jenkins - the default choice. Can be configured to use 512m of RAM only.
  • Install Jenkins on Linux
  • Note that you configure Jenkins via systemctl edit jenkins, then restart via systemctl restart jenkins.
  • Logs accessible via journalctl -u jenkins -f
• CircleCI - self-hosted option is not free. Skip.
• Concourse-CI: The fly binary is suspicious; the YAML config is weird; simple git build example missing. Skip.
• AppCircle.io: self-hosted option is not free. Skip.
• Agola.io: PITA top setup, you need etcd cluster, object storage and whatever. Skip.
• OpenShift gitops? Based on huge OpenShift and ‘only’ adds in Argo CD. Skip.
• TeamCity - not bad, needs server+agent to be up-and-running but “only” uses 2G server + 700mb agent. Pass.
• Laminar - simple and awesome but can’t poll git repo periodically.
  • Maybe a small kotlin-native repo poller which calls laminarc queue foo?
  • Or a git pulling build bot.
  • Pass, but later since it needs git build bot.