Installing Docker in Debian 9

Docker is a software for automating the deployment and management of applications in an operating system-level virtualization environment. It allows you to package an application with all its environment and dependencies into a container that can be ported to any Linux system with kernel cgroups support and provides a container management environment

Before installing Docker, update the existing Debian package list:

sudo apt update

Next, let's install the necessary packages that allow apt to use packages over HTTPS:

sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common

Add the GPG key of the official Docker repository to your system:

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -

Add Docker repository to the list of APT package sources:

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"

Then update the package database with information about Docker packages from the newly added repository:

sudo apt update

To make sure to install Docker from the Docker repository and not from the default Ubuntu repository, run the command:

apt-cache policy docker-ce

root@kvmde67-19464:~# apt-cache policy docker-ce
docker-ce:
Installed: (none)
Candidate: 5:19.03.8~3-0~debian-stretch
Version table:
5:19.03.8~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.7~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.6~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.5~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.4~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.3~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.2~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.1~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:19.03.0~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.9~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.8~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.7~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.6~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.5~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.4~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.3~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.2~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.1~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
5:18.09.0~3-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
18.06.3~ce~3-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
18.06.2~ce~3-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
18.06.1~ce~3-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
18.06.0~ce~3-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
18.03.1~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
18.03.0~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.12.1~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.12.0~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.09.1~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.09.0~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.06.2~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.06.1~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.06.0~ce-0~debian 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.03.3~ce-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.03.2~ce-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.03.1~ce-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages
17.03.0~ce-0~debian-stretch 500
500 https://download.docker.com/linux/debian stretch/stable amd64 Packages

This does not install docker-ce, but will use the Docker repository for Debian 9 (Stretch) to install it.

Installing Docker:

sudo apt install docker-ce

Docker is installed, the process will start at system startup.

Let's check that the process is running:

sudo systemctl status docker

root@kvmde67-19464:~# sudo systemctl status docker
Docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled
Active: active (running) since Wed 2020-05-06 15:15:44 MSK; 2min 51s ago
Docs: https://docs.docker.com
Main PID: 6594 (dockerd)
CGroup: /system.slice/docker.service
└─6594 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.so
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44.4160
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44.4167
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44:4173
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44:4182
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44.6000
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44.7043
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44:8040
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44:8067
May 06 15:15:44 kvmde67-19464.fornex.org systemd[1]: Started Docker Application Contai
May 06 15:15:44 kvmde67-19464.fornex.org dockerd[6594]: time="2020-05-06T15:15:44.8603

When we install Docker, we get not only the Docker service, but also the docker command line utility or the Docker client.

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You can also use our One-Click-Apps for one-click installation to install Docker To do so, select the required [VPS] plan(https://fornex.com/virtual-private-servers/) and choose Applications → Docker, to install.

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If you have any configuration difficulties or have additional questions, you can always contact our support team via ticket system.