How To Install Docker Compose on CentOS 7

To Install Docker Compose on CentOS 7

Docker Compose is a tool for running multi-container Docker applications. To configure an application’ s services with Compose we use a configuration file, and then, executing a single command, it is possible to create and start all the services specified in the configuration. In this tutorial, we are going to cover the method to install Docker Compose on CentOS 7.

Install Docker

The easiest way to install Docker is by downloading an installation script provided by the Docker project. 

[root@linuxhelp ~]# wget -qO- https://get.docker.com/ | sh

Once it is done, you can just enable and start the docker by making use of the following commands. 

[root@linuxhelp ~]# systemctl enable docker

Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

[root@linuxhelp ~]# systemctl start docker

Install the EPEL repository by executing the following command. 

[root@linuxhelp ~]# yum install epel-release
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
.
.
Installed:
epel-release.noarch 0:7-9                                                     
Complete!

After which you need to install python. 

[root@linuxhelp ~]# yum install -y python-pip
Loaded plugins: fastestmirror, langpacks
epel/x86_64/metalink                                     | 7.2 kB     00:00  
.
Installed:
python2-pip.noarch 0:8.1.2-5.el7                                              
Complete!

At this point, it is possible to install Docker Compose by executing a pip command so do the same as follows. 

[root@linuxhelp ~]# pip install docker-compose
Collecting docker-compose
  Downloading docker_compose-1.18.0-py2.py3-none-any.whl (111kB)
    100% |████████████████████████████████| 112kB 98kB/s
.
Successfully installed PyYAML-3.12 backports.ssl-match-hostname-3.5.0.1 cached-property-1.3.1 certifi-2018.1.18 chardet-3.0.4 docker-2.7.0 docker-compose-1.18.0 docker-pycreds-0.2.1 dockerpty-0.4.1 docopt-0.6.2 enum34-1.1.6 functools32-3.2.3.post2 idna-2.6 ipaddress-1.0.19 jsonschema-2.6.0 requests-2.18.4 texttable-0.9.1 urllib3-1.22 websocket-client-0.46.0

Also, you need to upgrade all the Python packages on CentOS 7. 

[root@linuxhelp ~]# yum upgrade python*
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
.
python-gobject-base.x86_64 0:3.22.0-1.el7_4.1                                 
python-perf.x86_64 0:3.10.0-693.17.1.el7                                      
Complete!

After that, you need to check the Docker Compose version with the following command. 

[root@linuxhelp ~]# docker-compose -v
docker-compose version 1.18.0, build 8dd22a9

After that, you need to test the Docker Compose.   So, let’ s create a new directory and move into it by making use of the following command. 

[root@linuxhelp ~]# mkdir hello-world
[root@linuxhelp ~]# cd hello-world/

And then you need to open a .yml file by making use of the following command. 

[root@linuxhelp hello-world]# vim docker-compose.yml
In that file, paste the following content
unixmen-compose-test:
 image: hello-world
Once done, save and exit the file. After that, you need to run the container. 

Next, execute the following command in the hello-world directory. 

[root@linuxhelp hello-world]# docker-compose up
Pulling unixmen-compose-test (hello-world:latest)...
latest: Pulling from library/hello-world
.
.
unixmen-compose-test_1  |  https://docs.docker.com/engine/userguide/
helloworld_unixmen-compose-test_1 exited with code 0

If everything is correct, the above thing   should be the output shown by Compose.  With this, the method to install and test Docker Compose on CentOS 7 and to use the Compose file in the YAML format comes to an end.