Install Docker Community Edition on Ubuntu 16.04

Hello everyone, today I am going to show you how to install Docker Community Edition on Ubuntu 16.04 server. This is the Docker official way to get the latest version of Docker. Its pretty simple to install this Docker CE. We have been tested this tutorial on Ubuntu 16.04.2 server edition.

Steps to install Docker Community Edition on Ubuntu 16.04

Step 1. Setup the repository

First, we need to install some packages and setup the official Docker repository on Ubuntu 16.04. Connect to Ubuntu 16.04 via SSH and copy paste the following command. I recommend to use copy and paste to avoid misspelling on the commands.

Install required packages

sudo apt-get -y install \
  apt-transport-https \
  ca-certificates \
  curl

Add the GPG key

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

Add the repository

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

Update Ubuntu

sudo apt update

Step 2. Install Docker

sudo apt install docker-ce

Output:

dhani@ubuntu:~$ sudo apt install docker-ce
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  aufs-tools cgroupfs-mount libltdl7
Suggested packages:
  mountall
The following NEW packages will be installed:
  aufs-tools cgroupfs-mount docker-ce libltdl7
0 upgraded, 4 newly installed, 0 to remove and 8 not upgraded.
Need to get 19.4 MB of archives.
After this operation, 89.4 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Step 3. Verify the installation

Now we need to check if Docker CE is correctly installed.

dhani@ubuntu:~$ docker -v
Docker version 17.03.1-ce, build c6d412e

Check Docker Daemon status

dhani@ubuntu:~$ 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 Thu 2017-05-11 08:32:20 WIB; 2min 12s ago
     Docs: https://docs.docker.com
 Main PID: 21360 (dockerd)
   CGroup: /system.slice/docker.service
           ├─21360 /usr/bin/dockerd -H fd://
           └─21365 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --st

May 11 08:32:19 ubuntu dockerd[21360]: time="2017-05-11T08:32:19.502523762+07:00" level=warning msg="Your kernel does not support cgroup rt peri
May 11 08:32:19 ubuntu dockerd[21360]: time="2017-05-11T08:32:19.502816780+07:00" level=warning msg="Your kernel does not support cgroup rt runt
May 11 08:32:19 ubuntu dockerd[21360]: time="2017-05-11T08:32:19.503677034+07:00" level=info msg="Loading containers: start."
May 11 08:32:19 ubuntu dockerd[21360]: time="2017-05-11T08:32:19.731189910+07:00" level=info msg="Firewalld running: false"
May 11 08:32:20 ubuntu dockerd[21360]: time="2017-05-11T08:32:20.263729462+07:00" level=info msg="Default bridge (docker0) is assigned with an I
May 11 08:32:20 ubuntu dockerd[21360]: time="2017-05-11T08:32:20.552549585+07:00" level=info msg="Loading containers: done."
May 11 08:32:20 ubuntu dockerd[21360]: time="2017-05-11T08:32:20.680553277+07:00" level=info msg="Daemon has completed initialization"
May 11 08:32:20 ubuntu dockerd[21360]: time="2017-05-11T08:32:20.681599787+07:00" level=info msg="Docker daemon" commit=c6d412e graphdriver=aufs
May 11 08:32:20 ubuntu systemd[1]: Started Docker Application Container Engine.
May 11 08:32:20 ubuntu dockerd[21360]: time="2017-05-11T08:32:20.698472290+07:00" level=info msg="API listen on /var/run/docker.sock"
lines 1-19/19 (END)

Now try to run Hello World using Docker command as follow:

root@ubuntu:~# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
78445dd45222: Pull complete 
Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://cloud.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/