Pipeline fails: No docker.sock

Hi there,

all my pipelines are crashing for a few weeks now. I am always getting this log after 9 seconds.

Running with gitlab-ci-multi-runner 1.11.1 (a67a225) on docker-ruby:2.4.0 (5b06164e) WARNING: before_script is not supported by selected executor and shell WARNING: script is not supported by selected executor and shell Using Docker executor with image ruby:2.4.1 ... ERROR: Preparation failed: Get http://unix.sock/v1.18/version: dial unix /var/run/docker.sock: connect: no such file or directory

Do I need to configure something? I have not that much experience with Gitlab CI so far.