Docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock

Question

I am new to docker. I just tried to use docker in my local machine(Ubuntu 16.04) with Jenkins.

I configured a new job with below pipeline script.

Answer 1

My first solutions was:

usermod -aG docker jenkins
usermod -aG root jenkins
chmod 664 /var/run/docker.sock

But none of them work for me, I tried:

chmod 777 /var/run/docker.sock

That works, but I don't know if it is the right call.