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Setup docker on Ubuntu

Machine environment

Local environment might matter for some shell commands

• AWS EC2 instance
• OS Ubuntu 20.x

Setup steps

All commands mentioned in the guide are executed inside post doing SSH into AWS EC2 ubuntu instance

1. Install/configure common/global repositories for getting software

   sudo apt install apt-transport-https ca-certificates curl software-properties-common
   

2. Install docker public key

   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
   

3. Set up the stable repository (not nightly or test)

   echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
   

4. Update the apt package index

   sudo apt-get update
   

5. Install the latest version of Docker Engine and containerd (not sure whether ce-cli and containerd were required.

   sudo apt-get install docker-ce docker-ce-cli containerd.io
   

6. Start the docker engine as a service

   sudo service docker start
   

7. Give access on docker shell to local user

   sudo usermod -aG docker $USER
   

   • re-login to the terminal post running the command. If this is not done, docker commands are available through sudo only
8. Run a sample hello-world app

   docker run hello-world
   

   • Output, in case of success

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

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