Docker on CentOS 7

December 7 2016
110 words, ~1 min. read
centos, docker

Steps

Update packages sudo yum update -y
Enable proxy export https_proxy=http://proxy.sbchand.net:8080
Install docker engine curl -fsSL https://get.docker.com/ | sh
Enable user permissions (optional) sudo usermod -aG docker sbchand
Logout and login (preferred)
Start docker sudo systemctl start docker
Ensure docker is running sudo systemctl status docker
Enable docker on every reboot sudo systemctl enable docker
Try docker info docker info
Try hello world docker run hello-world

NOTE: If you are behind proxy, try the following,

Create docker service configuration file

mkdir /etc/systemd/system/docker.service.d
touch /etc/systemd/system/docker.service.d/http-proxy.conf

Configure proxy in the above configuration file,

[Service]
Environment="HTTP_PROXY=http://proxy.sbchand.net:8080/" "NO_PROXY=localhost,127.0.0.1,hub.docker.sbchand.net"

Flush changes systemctl daemon-reload
Verify new configuration systemctl show --property=Environment docker
Restart docker systemctl restart docker