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Install local docker and docker-compose on CentOS 7

This article will show how to install local docker and docker-compose on CentOS 7.

This page is filed under keyword(s): docker, linux.

Configure the docker repository with yum

$ sudo tee /etc/yum.repos.d/docker.repo <<-'EOF'
> [dockerrepo]
> name=Docker Repository
> baseurl=https://yum.dockerproject.org/repo/main/centos/7/
> enabled=1
> gpgcheck=1
> gpgkey=https://yum.dockerproject.org/gpg
> EOF

Install and start local docker

$ sudo yum install docker-engine
$ sudo systemctl enable docker.service
$ sudo systemctl start docker

Run a sanity check to see if docker is working properly

$ sudo docker run --rm hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
c04b14da8d14: Pull complete 
Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9
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 Hub account:
 https://hub.docker.com

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

To allow the user to run docker without sudo, create a "docker" group and add yourusername to it.

$ sudo groupadd docker
$ sudo usermod -aG docker yourusername

Log out and log back in for the group changes to go into effect. Try it out:

$ docker run --rm hello-world

Enable docker to be run after reboot

$ sudo systemctl enable docker

Install docker-compose

$ sudo -i
# curl -L https://github.com/docker/compose/releases/download/1.9.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   600    0   600    0     0   2848      0 --:--:-- --:--:-- --:--:--  2870
100 7857k  100 7857k    0     0  15.5M      0 --:--:-- --:--:-- --:--:-- 15.5M
# chmod +x /usr/local/bin/docker-compose
# exit
$ logout

Check that docker is running

$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                      NAMES

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This page is filed under keyword(s): docker, linux.
Author: J. Kim
Last updated: 17 Mar 2017

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