64 lines
2.3 KiB
Markdown
64 lines
2.3 KiB
Markdown
# cloud.docker.com Configuration
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The automatic build is configured in cloud.docker.com.
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The following build configuration is expected:
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```yaml
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Source Repository: github.com/netbox-community/netbox-docker
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Build Location: Build on Docker Hub's infrastructure
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Autotest: Internal and External Pull Requests
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Repository Links: Enable for Base Image
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Build Rules:
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- Source Type: Branch
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Source: release
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Docker Tag: branches
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Dockerfile location: Dockerfile
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Build Context: /
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Autobuild: on
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Build Caching: on
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- Source Type: Branch
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Source: release
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Docker Tag: prerelease
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Dockerfile location: Dockerfile
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Build Context: /
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Autobuild: on
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Build Caching: on
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- Source Type: Branch
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Source: release
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Docker Tag: release
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Dockerfile location: Dockerfile
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Build Context: /
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Autobuild: on
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Build Caching: on
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Build Environment Variables:
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# Create an app on Github and use it's OATH credentials here
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- Key: GITHUB_OAUTH_CLIENT_ID
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Value: <secret>
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- Key: GITHUB_OAUTH_CLIENT_SECRET
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Value: <secret>
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Build Triggers:
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- Name: Cron Trigger
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Trigger URL: <generated>
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# Use this trigger in combination with e.g. https://cron-job.org in order to regularly schedule builds
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```
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## Background Knowledge
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The build system of cloud.docker.com is not made for this kind of project.
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But we found a way to make it work, and this is how:
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1. The docker hub build system [allows to overwrite the scripts that get executed
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for `build`, `test` and `push`](overwrite). See `/hooks/*`.
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2. Shared functionality of the scripts `build`, `test` and `push` is extracted to `/hooks/common`.
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3. The `build` script runs `run_build()` from `/hooks/common`.
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This triggers either `/build-branches.sh`, `/build-latest.sh` or directly `/build.sh`.
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4. The `test` script just invokes `docker-compose` commands.
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5. The `push` script runs `run_build()` from `hooks/common` with a `--push-only` flag.
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This causes the `build.sh` script to not re-build the Docker image, but just the just built image.
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The _Docker Tag_ configuration setting (`$DOCKER_TAG`) is only used to select the type (_release_, _prerelease_, _branches_) of the build in `hooks/common`.
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Because it has a different meaning in all the other build scripts, it is `unset` after it has served it's purpose.
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[overwrite]: https://docs.docker.com/docker-hub/builds/advanced/#override-build-test-or-push-commands
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