With a simple
gitlab-ci setup I am trying to build a docker, and I want to push that docker into the registry for that project. But despite the available documentation I am not able to get it to work. The examples are not good enough, or out of date, or both. After following many examples  and various attempts I am now stuck at getting this pipeline error
... $ docker info errors pretty printing info Client: Debug Mode: false Server: ERROR: error during connect: Get https://gitlab.example.com:5050/v1.40/info: x509: certificate signed by unknown authority
The GitLab software is up-to-date (version 13.0.6)
Say the we have this very basic example
variables: DOCKER_HOST: tcp://gitlab.example.com:5050 build: image: docker:19.03.11 stage: build tags: - docker-in-docker services: - docker:19.03.11-dind script: - docker info
An I have a runner which I created as follows (see )
gitlab-runner register -n \ --url https://gitlab.example.com/ \ --registration-token m-secret \ --executor docker \ --description "My Privileged Docker Runner" \ --docker-image "docker:19.03.11" \ --docker-privileged \ --docker-volumes "/certs/client"
The CERT of my GitLab server is from Let’s Encrypt. Nothing fancy, just working out of the box, thanks to GitLab.
From a “real” command line the
docker login and
docker push commands work as expected. So, the built-in registry in GitLab is working, and the CERT is OK.