如何使用自己的runner在gitlab作业中将Postgres作为服务运行?

我想配置gitlab管道,以便使用Maven对Postgres DB运行集成测试。我试着跟着这个 documentation

我的 gitlab-ci.yml :

cache:
  key: "$CI_COMMIT_REF_NAME"
  untracked: true
  paths:
  - .m2/repository/

variables:
  MAVEN_CLI_OPTS: "-s .m2/settings.xml "
  MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository/"
  POSTGRES_DB: postgres
  POSTGRES_USER: runner
  POSTGRES_PASSWORD: runner

stages:
- build
- verify

build:
  image: maven:3.6.0-jdk-8
  stage: build
  script:
  - "mvn $MAVEN_CLI_OPTS --quiet clean package -Dmaven.test.skip=true"
  artifacts:
    paths:
    - "target/*"

test:
  image: maven:3.6.0-jdk-8
  services:
  - postgres:latest
  stage: verify
  script:
  - "mvn $MAVEN_CLI_OPTS --quiet -Dspring.profiles.active=dev clean test"