docker run in the tutorial will fail

[cpaelzer]

Request type

Fix

What needs to get done

Hi,
I've ran through your tutorial as I wanted to refer to it for creating a ROCK artifact.
In doing so I realized that the line docker run --rm hello:latest exec hello -t will fail on a fresh system.

What will happen is this:

docker run --rm hello:latest exec hello -t

docker: permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/create": dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.
: command not found

The reason for that are the default permissions:

 ll /var/run/docker.sock
srw-rw---- 1 root root 0 Jul 24 10:46 /var/run/docker.sock=

I like your tutorial and my suggestion would be to not go into socket group management and instead maybe just suggest it with sudo as that will allow it to work - WDYT?

sudo docker run --rm hello:latest exec hello -t
hello, world

Documentation location

https://documentation.ubuntu.com/rockcraft/en/stable/tutorials/hello-world/

Additional information

No response

[cpaelzer]

Same for https://documentation.ubuntu.com/rockcraft/en/stable/tutorials/chisel/

[cjdcordeiro]

Indeed this is a consequence of a broader issue: #651

@clay-lake can you please add this (if not added yet) to the list?