Install Mirantis Container Runtime for Ubuntu¶

Prerequisites¶

Perform all prerequisites as required prior to installing MCR on Ubuntu.

Uninstall old versions¶

Use the apt-get remove command to uninstall Docker Community versions, if present.

sudo apt-get remove docker docker-engine docker-ce docker-ce-cli docker.io

The apt-get command may report that none of the packages are installed.

Note

The contents of /var/lib/docker/, including images, containers, volumes, and networks, are preserved.

Extra steps for aufs¶

For Ubuntu 16.04 and higher, the Linux kernel includes support for overlay2, and Mirantis Container Runtime uses it as the default storage driver. If you need to use aufs instead, it must be manually configured.

Install Mirantis Container Runtime¶

Mirantis Container Runtime can be installed either by using Mirantis repositories, or by downloading and installing the DEB package and thereafter manually managing all upgrades. The Mirantis repository method is recommended, for the ease it lends in terms of both installation and upgrade tasks. The more manual DEB package approach, however, is useful in certain situations, such as installing MCR on air-gapped system that have no access to the Internet.

Continue from this point if you are using Mirantis repositories on Ubuntu, or to install from a Debian package go to Install from a Debian package.

Install using the repository¶

To install Mirantis Container Runtime on a new host machine using the Mirantis repository you must first set the repository up on the machine.

Set up the repository¶

Update the apt package index.
```
sudo apt-get update
```

Install packages to allow apt to use a repository over HTTPS.

sudo apt-get install \
  apt-transport-https \
  ca-certificates \
  curl \
  software-properties-common

Temporarily store https://repos.mirantis.com in an environment variable. This variable assignment does not persist when the session ends:
```
DOCKER_EE_URL="https://repos.mirantis.com"
```
Temporarily add a $DOCKER_EE_VERSION variable into your environment.
```
DOCKER_EE_VERSION=23.0
```
Add Docker’s official GPG key using your customer Mirantis Container Runtime repository URL.
```
curl -fsSL "${DOCKER_EE_URL}/ubuntu/gpg" | sudo apt-key add -
```

Verify that you now have the key with the fingerprint DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96, by searching for the last eight characters of the fingerprint. Use the command as-is. It works because of the variable you set earlier.

sudo apt-key fingerprint 6D085F96

pub   4096R/0EBFCD88 2017-02-22
      Key fingerprint = DD91 1E99 5A64 A202 E859  07D6 BC14 F10B 6D08 5F96
uid                  Docker Release (EE deb) <docker@docker.com>
sub   4096R/6D085F96 2017-02-22

Set up the stable repository, using the following command as-is (which works due to the variable set up earlier in the process).
```
sudo add-apt-repository \
  "deb [arch=$(dpkg --print-architecture)] $DOCKER_EE_URL/ubuntu \
  $(lsb_release -cs) \
  stable-$DOCKER_EE_VERSION"
```
Note

The included lsb_release -cs sub command returns the name of your Ubuntu distribution, for example, focal.

Install Mirantis Container Runtime¶

Update the apt package index.
```
sudo apt-get update
```
Install the latest version of Mirantis Container Runtime and containerd, or go to the next step to install a specific version. Any existing installation of MCR is replaced.
```
sudo apt-get install docker-ee docker-ee-cli  docker-ee-rootless-extras containerd.io
```
Warning

If you have multiple Mirantis repositories enabled, installing or updating without specifying a version in the apt-get install or apt-get update command always installs the highest possible version, which may not be appropriate for your stability needs.
On production systems, you should install a specific version of Mirantis Container Runtime instead of always using the latest. The following output is truncated.
```
apt-cache madison docker-ee

docker-ee | *:23.0~ee-0~ubuntu-focal | https://repos.mirantis.com/ubuntu focal/stable amd64 Packages
```
The contents of the list depend upon which repositories are enabled, and are specific to your version of Ubuntu (indicated by the focal suffix on the version, in this example). Choose a specific version to install. The second column is the version string. The third column is the repository name, which indicates which repository the package is from and by extension its stability level. To install a specific version, append the version string to the package name and separate them by an equals sign (=).
```
sudo apt-get install docker-ee=<VERSION_STRING> \
docker-ee-cli=<VERSION_STRING> \
docker-ee-rootless-extras=<VERSION_STRING> containerd.io
```
Note

MCR nodes in rootless mode cannot currently be a member of an MKE cluster.

The MCR daemon starts automatically.
Verify that MCR is installed correctly by running the hello-world image.
```
sudo docker run hello-world
```
This command downloads a test image and runs it in a container. When the container runs, it prints an informational message and exits.

Mirantis Container Runtime is installed and running. The docker group is created but no users are added to it. You need to use sudo to run MCR commands.

Upgrade Mirantis Container Runtime¶

If upgrading to a new major Mirantis Container Runtime version (such as when going from version 20.10 to 23.0), add the new repository.
Run sudo apt-get update.
Follow the installation instructions, choosing the new version you want to install.

Install from a Debian package¶

If you cannot use the Mirantis repository to install Mirantis Container Runtime, you can download the .deb files for your release and install them manually. You need to download a new file or set of files each time you want to upgrade Mirantis Container Runtime.

Go to repos.mirantis.com in your browser.
Go to /ubuntu/dists/bionic/pool/stable-<VERSION>/amd64/ and download the .deb file for the Ubuntu release and architecture you want to install.

Note

Starting with 19.03, you have to download three .deb files. They are docker-ee-cli_<version>.deb, containerd.io_<version>.deb, and docker-ee_<version>.deb.
Install MCR, changing the path below to the path where you downloaded the Mirantis Container Runtime package.
```
sudo dpkg -i <path_to_downloaded_ubuntu_package_.deb>
```
Or, if you downloaded the three .deb files, you must install them in the following order:
```
sudo dpkg -i /path/to/docker-ee-cli_<version>.deb
sudo dpkg -i /path/to/containerd.io_<version>.deb
sudo dpkg -i /path/to/docker-ee_<version>.deb
```
The MCR daemon starts automatically.
Verify that MCR is installed correctly by running the hello-world image.
```
sudo docker run hello-world
```
This command downloads a test image and runs it in a container. When the container runs, it prints an informational message and exits.

Mirantis Container Runtime is installed and running. The docker group is created but no users are added to it. You need to use sudo to run MCR commands.

Upgrade Mirantis Container Runtime¶

To upgrade Mirantis Container Runtime, download the newer package file and repeat the installation procedure, pointing to the new file.

Enable MCR Telemetry¶

By default, MCR automatically records and transmits data to Mirantis for monitoring and analysis purposes. The data collected provides the Mirantis Customer Success Organization with information that helps us to better understand the operational use of MCR by our customers. It also provides key feedback in the form of product usage statistics, which enable our product teams to enhance Mirantis products and services.

To disable the telemetry function, set features.telemetry to false in your /etc/docker/daemon.json file. Change the setting to true to re-enable telemetry.

{"features":{"telemetry": false}}

Caution

To send the telemetry, verify that dockerd can resolve api.segment.io and create a TCP (HTTPS) connection on port 443.

Run MCR as a non-root user (Rootless mode)¶

Note

MCR nodes in rootless mode cannot belong to a MKE cluster.

For information on rootless mode installation and configuration, refer to the Docker documentation Run the Docker daemon as a non-root user (Rootless mode).

Uninstall Mirantis Container Runtime¶

Uninstall the Mirantis Container Runtime package.

sudo apt-get purge docker-ee docker-ee-cli containerd.io

Images, containers, volumes, or customized configuration files on your host are not automatically removed. Run the following command to delete all images, containers, and volumes.
```
sudo rm -rf /var/lib/docker
```

You must delete any edited configuration files manually.