Wednesday, August 3, 2022

#Install #docker on #Centos7, #Centos9, #Ubuntu20

Tested OSs: Centos7, Centos9 and Ubuntu 20


Step-1 (Optional)

*Note: Ignore this step, if you are not in installing docker in the University of Tartu's private cloud

- Create the daemon file manually. This is because of some conflict in University's Openstack Environment.

sudo mkdir -p /etc/docker && cd /etc/docker

- Create and update docker daemon file

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sudo tee /etc/docker/daemon.json <<EOF
{
	
"default-address-pools": [{"base":"172.80.0.0/16","size":24}]
}
EOF

Step-2

  • Now run this command. It will add the official Docker repository, download the latest version of Docker, and install it:
curl -fsSL https://get.docker.com/ | sh
  • After installation has completed, start the Docker daemon:
sudo systemctl start docker
  • Verify that it’s running:
sudo systemctl status docker
  • Enable docker

    sudo systemctl enable docker

Step-3

To run docker commands with non-root privileges

  • Create a docker group (If it's already created then ignore): sudo groupadd docker
  • Add a user to docker group: sudo usermod -aG docker $USER
  • Activate the changes: newgrp docker
  • Check the installation by displaying docker version: docker --version

 

 

 - That's all for now.

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