deploy-using-helm

Installing Docker

Reference: https://docs.docker.com/engine/install/centos/

1. Install yum-utils

    sudo yum install -y yum-utils
   

2. Add docker repo

    sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
   

3. Install docker engine

    sudo yum install -y docker-ce docker-ce-cli containerd.io
   

4. Enable docker service

    sudo systemctl enable --now docker
   

5. Check docker service status

    sudo systemctl status docker
   

6. Create a docker group (if required)

    sudo groupadd docker
   

7. Add your personal user to the docker group

    sudo usermod -aG docker $USER
   

   Run the following command

    newgrp docker
   

   to update group information in the current session. Alternatively, you can simply re-login.

8. Run a test to confirm docker is working

    [roberto@vmlab01 ~]$ docker run hello-world
   
    Unable to find image 'hello-world:latest' locally
    latest: Pulling from library/hello-world
    b8dfde127a29: Pull complete
    Digest: sha256:7d91b69e04a9029b99f3585aaaccae2baa80bcf318f4a5d2165a9898cd2dc0a1
    Status: Downloaded newer image for hello-world:latest
   
    Hello from Docker!
       ...
   

9. If you get the following error when ran the previous command:

   Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get “http://%2Fvar%2Frun%2Fdocker.sock/v1.24/version”: dial unix /var/run/docker.sock: connect: permission denied

   Run the following command:

    sudo chgrp docker /var/run/docker.sock
   

   and try again