Migrating from the RPM

During the development cycle of the 2.3 release, we started to focus more and more on containerized deployments. The official openSUSE Docker image got more attention and it started to be thinner and easier to deploy. Following current trends, we decided to make these kinds of deployments the preferred ones in the 2.3 release.

The migration path from a pure RPM installation to a containerized one is not that big. That’s because the Docker image simply installs the RPM as produced in our OBS project. So from the distribution point of view (and the tooling) nothing changes: the “only” change is to go from a bare metal installation to Docker containers.

Stopping Portus

Prior to anything, we should stop Portus, which means stopping both the Portus Web UI, and the Portus crono service.

On Version 2.2, and older versions, the Web UI is configured as a virtual host in apache2. Thus, in order to stop it, you need to disable that configuration. You can do that by running:

sudo mv /etc/apache2/vhosts.d/portus.conf /etc/apache2/vhosts.d/portus.conf.disabled

Having disabled the vhost configuration, you can stop the crono service by running:

sudo systemctl stop portus-crono

Once you have portus stopped, you can proceed to back up the data.

Backing up

After stopping portus, you should proceed as you would with any upgrade: back up your data. There are two main things you should back up: images stored in the registry and the database.

The registry can store Docker images in remote locations with the support for Amazon S3, Microsoft Azure, etc. That being said, you can also store these images locally with the following configuration:

storage:
  filesystem:
    rootdirectory: /my/location

This configuration is stored in /etc/registry/config.yml, which was auto-generated if you used the portusctl setup command for setting up your RPM installation. So, now you have to back up the /my/location location as pointed out on the above example.

Finally, you should back up the data stored on the MySQL/MariaDB instance.

Running containers

At this point you can deploy Portus with Docker images. We maintain some examples that use docker-compose here that might serve as inspiration. Moreover, if you are using Kubernetes, you might also be interested in the Helm Chart developed here.

Regardless of your deployment method, make sure to read some tips that we have written here. This will help you when configuring your deployment methods.

Removing old RPM

Once you have the new portus container running, it is time to clean up by removing the old Portus RPM. You can do so by running:

zypper rm --clean-deps portus

The “clean-deps” option will remove dependencies that are not needed for any other package. This could be the case of rubygem-passenger-apache2. If you are unsure of this, run the previous command without the “clean-deps” option.