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CentOS Community Container Pipeline (CCCP) is an open-source platform to containerize applications based on CentOS.

CCCP: Builds the application (from a git repository) → Packages with the appropriate runtime → Scans the image → Pushes image to a public registry

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Use Case

I have a certain stack I develop with (be it Django, Golang, NodeJS, Redis, RabbitMQ, etc.) using my CentOS as a base platform.

How do I package that application into a container that's updated automatically every time I push changes? What about security and updates, how do I automate that each time I push any changes?

That's where CCCP comes in.

CCCP will:

• Scan the image for updates, fixes, capabilities and push it to a public registry (by default, http://registry.centos.org)
• Automatically rebuild when a change is detected within the repository. Such as an update in base image (FROM in Dockerfile) or a git push to the project's git repository
• Notifications / alerts regarding build status and scan results (by e-mail)

How do I host my application?

Similar to projects such as Homebrew it's as easy as opening up a pull request.

A developer wishing to host their container image will open up a pull request to the CentOS Container Index.

Once the pull request is merged, CCCP:

1. Links the Dockerfile
2. Builds the image
3. Scans / analyzes it
4. Pushes to registry.centos.org
5. Notifies the developer (email)

Once a project is in the CentOS Container Index, the CentOS Container Pipeline Service service automatically tracks the project's Git repo and branch and rebuilds it every time there is a future change.

How everything works

1. Project onboard / the main "index"

   First off, the pipeline points to an index. For the CentOS community and in our example, this refers to the: CentOS Container Index.

2. Jenkins and OpenShift tracking

   Jenkins is utilized in order to track each application's Git repository as well as branch for any changes. This triggers a new build on OpenShift when a change is pushed.

   Changes to the application's repository, update to the base image or any RPMs that are part of the image will trigger a new build

3. Building the image

   The container image is built by OpenShift.

4. Scan and analyze the image

   Scanning happens by running scripts in the container image to check for:

   • yum updates
   • updates for packages installed via pip, npm and gem
   • capabilities of the container created from resulting container image by analyzing RUN label in the Dockerfile
   • verify the installed RPMs

5. Push to the public registry (https://registry.centos.org)

   Finally, the image is pushed to https://registry.centos.org

6. Notification

   An email is sent out the developer mentioning the status of the build and scan process as well as a link to read the detailed logs.

Architecture Diagram

Coming soon!

Deploy your own pipeline

The service recently underwent an architecture change and is now completely deployed on top of OpenShift. We have documented the steps in docs directory. We recommend you to follow the docs and open up issues if something doesn't work out.

Contribute to the CentOS Community Container Pipeline Service

We're always looking for ideas and improvements for the service! If you're interested in contributing to this repository, follow these simple steps:

• open an issue on GitHub describing the feature/bug
• fork the repository
• work on your branch for the fix of the issue
• raise a pull request

Before a PR is merged, it must:

• pass the CI done on CentOS CI
• be code reviewed by the maintainers
• have maintainers' LGTM (Looks Good To Me)

Community

Chat (Mattermost): Our prefered method to reach the main developers is through Mattermost at chat.openshift.io.

IRC: If you prefer IRC, we can reached at #centos-devel on Libera.chat.

Email: You could always e-mail us as well at centos-devel@centos.org