GitLab Runner for autoscaling with Docker Machine on Google preemptible VM

config.toml

[[runners]]
  name = "gce-main-scal"
  url = ""
  token = ""
  executor = "docker+machine"
  # 最大伸缩量
  limit = 3
  [runners.docker]
    tls_verify = false
    image = "ubnutu:16.04"
    privileged = false
    disable_cache = false
    volumes = ["/cache"]
    shm_size = 0
    # 缓存服务配置
  [runners.cache]
     Type = "s3"
     ServerAddress = "10.138.0.2:9005" #your minio-instance
     AccessKey = "" # minio AccessKey
     SecretKey = "" # minio Secret
     BucketName = "cache"
     Insecure = true
     Shared = true

  [runners.machine]
  # 配置见 https://docs.gitlab.com/runner/configuration/advanced-configuration.html#the-runners-machine-section
    IdleCount = 0
    IdleTime = 120
    MaxBuilds = 3
    MachineDriver = "google"
    MachineName = "ci-as-w-%s"
    MachineOptions = [
      # docker machine 配置 见 https://docs.docker.com/machine/drivers/gce/
      "google-project=jwb-android",
      "google-zone=us-west1-c",
      "google-machine-type=custom-2-5120",
      "google-machine-image=ubuntu-os-cloud/global/images/ubuntu-1604-xenial-v20180405",
      "google-tags=gitlab-ci-runner-worker,project-noip",
      # 抢占式实例
      "google-preemptible=true",
      "google-use-internal-ip=true",
      # 代理容器注册服务
      "engine-registry-mirror=http://10.138.0.2:6000"
    ]