Gitlab-runner configuration to build and run docker images

config.toml

# /etc/gitlab-runner/config.toml

concurrent = 10
check_interval = 0

[session_server]
  session_timeout = 1800

[[runners]]
  name = $RUNNER_NAME
  url = $GITLAB_URL
  token = $RUNNER_REGISTRATION_TOKEN
  executor = "docker"
  environment = ["DOCKER_TLS_CERTDIR="]
  [runners.custom_build_dir]
  [runners.docker]
    tls_verify = false
    image = "docker:19.03.1"
    privileged = true
    disable_entrypoint_overwrite = false
    oom_kill_disable = false
    disable_cache = true
    shm_size = 0
    network_mode = "bridge" #This is key for docker networking
  [runners.cache]
    [runners.cache.s3]
    [runners.cache.gcs]