docker.sock)

Possibly due to #423 (closed)? When running a Docker-in-Docker CI file, it fails due to not being able to connect to the Docker daemon:

Running with gitlab-runner 10.5.0 (80b03db9)
  on gitlab-gitlab-runner-7d7c9dcbbc-5nc7v 22b9e572
Using Kubernetes namespace: default
Using Kubernetes executor with image docker:latest ...
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Waiting for pod default/runner-22b9e572-project-21-concurrent-0hlctz to be running, status is Pending
Running on runner-22b9e572-project-21-concurrent-0hlctz via gitlab-gitlab-runner-7d7c9dcbbc-5nc7v...
Cloning repository...
Cloning into '/kevin/ci-test'...
Checking out a07a64b3 as master...
Skipping Git submodules setup
$ docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Warning: failed to get default registry endpoint from daemon (Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?). Using system default: https://index.docker.io/v1/
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
ERROR: Job failed: error executing remote command: command terminated with non-zero exit code: Error executing in Docker Container: 1

GitLab CI file (taken verbatim from the built-in Docker template):

# This file is a template, and might need editing before it works on your project.
# Official docker image.
image: docker:latest

services:
  - docker:dind

before_script:
  - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY

build-master:
  stage: build
  script:
    - docker build --pull -t "$CI_REGISTRY_IMAGE" .
    - docker push "$CI_REGISTRY_IMAGE"
  only:
    - master

build:
  stage: build
  script:
    - docker build --pull -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" .
    - docker push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG"
  except:
    - master

Dockerfile (shouldn't affect anything, since it fails on docker login, but just for completeness's sake):

# This file is a template, and might need editing before it works on your project.
FROM node:7.9

WORKDIR /usr/src/app

CMD [ "npm", "start" ]

# replace this with your application's default port
EXPOSE 8888

I have set gitlab.gitlab-runner.runners.privileged = true, so I don't think it's a configuration error.

Edited May 26, 2018 by Kevin Liu