Connecting to docker-in-docker from a GitLab CI runner -


i have gitlab pipeline want to:

  1. build java app
  2. test using docker-compose
  3. push docker repository

the primary issue i'm having works:

services:   - docker:dind  docker_test:   stage: docker_test   image: docker:latest   script:   - docker version

the output printed expected:

> gitlab-ci-multi-runner exec docker --docker-privileged docker_test ... $ docker version client:  version:      17.06.0-ce ... server:  version:      17.06.0-ce ... build succeeded

while does not (installation steps docker-ce omitted):

services:   - docker:dind  docker_test:   stage: docker_test   image: ubuntu:latest       << note change   script:   - docker version

it fails with:

$ docker version client:  version:      17.06.0-ce  api version:  1.30  go version:   go1.8.3  git commit:   02c1d87  built:        fri jun 23 21:23:31 2017  os/arch:      linux/amd64 cannot connect docker daemon @ unix:///var/run/docker.sock. docker daemon running? error: build failed: exit code 1 fatal: exit code 1

how make ubuntu image (or whatever image going build project) connect linked docker-in-docker service? what docker:latest doing i'm not?

i've read on gitlab services documentation, makes sense me hostname perspective. (if have mysql service, can connect on mysql:3306.)

edit: updating command echo $docker_host, see in docker:latest image:

$ echo $docker_host tcp://docker:2375

and in ubuntu:latest image see:

$ echo $docker_host (nothing - doesn't let me add blank code line)

as information you've added, hope work:

services:   - docker:dind  docker_test:   stage: docker_test   image: ubuntu:latest   variables:       docker_host: "tcp://docker:2375"   script:   - docker version

alternatively:

services:   - docker:dind  docker_test:   stage: docker_test   image: ubuntu:latest    script:   - export docker_host=tcp://docker:2375   - docker version

it seems gitlab not set docker_host variable custom images.


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