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netbox-docker/DOCKER_HUB.md
Christian Mäder 4ef420d443
Build system for hub.docker.com
2019-02-06 10:09:44 +01:00

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cloud.docker.com Configuration

The automatic build is configured in cloud.docker.com.

The following build configuration is expected:

Source Repository: github.com/netbox-community/netbox-docker
Build Location: Build on Docker Hub's infrastructure
Autotest: Internal and External Pull Requests
Repository Links: Enable for Base Image
Build Rules:
- Source Type: Branch
  Source: master
  Docker Tag: branches-main
  Dockerfile location: Dockerfile
- Source Type: Branch
  Source: master
  Docker Tag: branches-ldap
  Dockerfile location: Dockerfile.ldap
- Source Type: Branch
  Source: master
  Docker Tag: prerelease-main
  Dockerfile location: Dockerfile
- Source Type: Branch
  Source: master
  Docker Tag: prerelease-ldap
  Dockerfile location: Dockerfile.ldap
- Source Type: Branch
  Source: master
  Docker Tag: release-main
  Dockerfile location: Dockerfile
- Source Type: Branch
  Source: master
  Docker Tag: release-ldap
  Dockerfile location: Dockerfile.ldap
Build Environment Variables:
# Create an app on Github and use it's OATH credentials here
- Key: GITHUB_OAUTH_CLIENT_ID
  Value: <secret>
- Key: GITHUB_OAUTH_CLIENT_SECRET
  Value: <secret>
Build Triggers:
- Name: Cron Trigger
# Use this trigger in combination with e.g. https://cron-job.org in order to regularly schedule builds

Background Knowledge

The build system of cloud.docker.com is not made for this kind of project. But we found a way to make it work, and this is how:

  1. The docker hub build system allows to overwrite the scripts that get executed for build, test and push. See hooks/*.
  2. Shared functionality of the scripts build, test and push is extracted to hooks/common.
  3. The build script runs run_build() from hooks/common. This triggers either build-branches.sh, build-latest.sh or directly build.sh.
  4. The test script just invokes docker-compose commands.
  5. The push script runs run_build() from hooks/common with a --push-only flag. This causes the build.sh script to not re-build the Docker image, but just the just built image.

The Docker Tag configuration setting is misused to select the type (release, prerelease, branches) of the build as well as the variant (main, ldap).

The Dockerfile location configuration setting is completely ignored by the build scripts.