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Docker on Ubuntu 20.04: Permissions

I will be working with Docker/K8s pretty extensively. I’ve been tasked with creating my test environment. Knowing nothing of what I was doing, after installing docker to my environment, I was having to sudo everything to run it.

Should probably read the manual, but who does that?

Big sticking point – I don’t want to have to sudo everything to run it, so, a caveat to the instructions. From https://docs.docker.com/engine/install/linux-postinstall/:

sudo groupadd docker
sudo usermod -aG docker $USER
newgrp docker 

This should do it. I should be able to run docker run hello-world without trouble.

No dice. Same docker.sock error.

Logged out, log back in.

Nope.

Solution?

sudo reboot

I know, right? But that’s what had to happen to get Docker to play nice.