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I have GitLab server and a separate docker-registry. I have created a testuser with a testpassword.

My .gitlab-ci.yml

image: docker:latest services: - docker:18.09.7-dind variables: DOCKER_HOST: tcp://docker:2375/ DOCKER_DRIVER: overlay2 # See https://github.com/docker-library/docker/pull/166 DOCKER_TLS_CERTDIR: "" REGISTRY: myregistry:5000/golang-test stages: - build # - test before_script: - docker login -u testuser -p testpassword myregistry:5000 build_project: stage: build tags: - docker-ci script: - docker ps - docker build -t $REGISTRY . - docker push $REGISTRY

When CI pipeline runs, I get following error.

WARNING! Using --password via the CLI is insecure. Use --password-stdin. Error response from daemon: Get https://myregistry:5000/v2/: dial tcp: lookup worker1 on 192.168.123.456:53: no such host ERROR: Job failed: exit code 1

concurrent = 1 check_interval = 0 [session_server] session_timeout = 1800 [[runners]] name = "docker-ci" url = "https://gitlab.sample.com:8000/" token = "89MfxRTby83ny3eTkTf2" tls-ca-file = "/etc/gitlab-runner/certs/gitlab.sample.com.crt" executor = "docker" pre_build_script = "export DOCKER_HOST=tcp://docker:2375" [runners.custom_build_dir] [runners.cache] [runners.cache.s3] [runners.cache.gcs] [runners.docker] tls_verify = false image = "ubuntu:18.04" privileged = true disable_entrypoint_overwrite = false oom_kill_disable = false disable_cache = false volumes = ["/cache"] shm_size = 0

This was after suggested modifications here.

I can successfully login to my docker-registry using docker login -u testuser -p testpassword https://myregistry:5000 from gitlab running server.

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Are you sure that your registry is publicly available? Checklist:

  • Check if the domain is reachable and responding the right IP address -- nslookup myregistry
  • Check if your port is open or not blocked any kind of software (let's say via firewalls or AWS security group) -- telnet myregistry 5050
  • Check if your registry is not restricted for a particular CIDR of IP
  • Test your login locally and ensure that there is no problem with it
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