Completing Docker Engine Installation and Upgrading from a Package

The list returned depends on which repositories are enabled, and is specific to your version of SLES. Install a specific version by its fully qualified package name, which is the package name (`docker-ce`) plus the version string (2nd column), separated by a hyphen (`-`). For example, `docker-ce-3:{{% param "docker_ce_version" %}}`. Replace `<VERSION_STRING>` with the desired version and then run the following command to install: ```console $ sudo zypper install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io docker-buildx-plugin docker-compose-plugin ``` This command installs Docker, but it doesn't start Docker. It also creates a `docker` group, however, it doesn't add any users to the group by default. {{< /tab >}} {{< /tabs >}} 2. Start Docker Engine. ```console $ sudo systemctl enable --now docker ``` This configures the Docker systemd service to start automatically when you boot your system. If you don't want Docker to start automatically, use `sudo systemctl start docker` instead. 3. Verify that the installation is successful by running the `hello-world` image: ```console $ sudo docker run hello-world ``` This command downloads a test image and runs it in a container. When the container runs, it prints a confirmation message and exits. You have now successfully installed and started Docker Engine. {{% include "root-errors.md" %}} #### Upgrade Docker Engine To upgrade Docker Engine, follow the [installation instructions](#install-using-the-repository), choosing the new version you want to install. ### Install from a package If you can't use Docker's `rpm` repository to install Docker Engine, you can download the `.rpm` file for your release and install it manually. You need to download a new file each time you want to upgrade Docker Engine.  1. Go to [{{% param "download-url-base" %}}/]({{% param "download-url-base" %}}/) and choose your version of SLES. Then browse to `s390x/stable/Packages/`

This section details the final steps for installing Docker Engine on SLES after adding the repository, including starting the Docker service, enabling automatic startup, and verifying the installation with the hello-world image. It also provides instructions for upgrading Docker Engine by repeating the installation process with the desired version and offers an alternative installation method using a direct download of the .rpm package.