为了在 gitlab-runner 中使用 cache，配置了一个 minio 服务用于存储缓存的中间文件。

参考官方文档

1. 下载 minio 服务端
2. 配置 /etc/default/minio 配置文件

   # 修改存储数据的路径
   MINIO_VOLUMES="/tmp/minio/"
   # Use if you want to run MinIO on a custom port.
   MINIO_OPTS="--address :9000 --console-address :9001"
   # Root user for the server.
   MINIO_ROOT_USER=Root-User
   # Root secret for the server.
   MINIO_ROOT_PASSWORD=Root-Password
   

3. 下载 minio.service 文件

   [Unit]
   Description=MinIO
   Documentation=https://docs.min.io
   Wants=network-online.target
   After=network-online.target
   AssertFileIsExecutable=/usr/local/bin/minio
   
   [Service]
   WorkingDirectory=/usr/local/
   
   User=minio
   Group=minio
   ProtectProc=invisible
   
   EnvironmentFile=/etc/default/minio
   ExecStartPre=/bin/bash -c "if [ -z \"${MINIO_VOLUMES}\" ]; then echo \"Variable MINIO_VOLUMES not set in /etc/default/minio\"; exit 1; fi"
   ExecStart=/usr/local/bin/minio server $MINIO_OPTS $MINIO_VOLUMES
   
   # Let systemd restart this service always
   Restart=always
   
   # Specifies the maximum file descriptor number that can be opened by this process
   LimitNOFILE=1048576
   
   # Specifies the maximum number of threads this process can create
   TasksMax=infinity
   
   # Disable timeout logic and wait until process is stopped
   TimeoutStopSec=infinity
   SendSIGKILL=no
   
   [Install]
   WantedBy=multi-user.target
   
   # Built for ${project.name}-${project.version} (${project.name})
   

   注意
   在2中，设置了一个 minio 的存储目录，在 3 中设置了用户和组，为了避免使用 root，添加下面的组和用户：

   sudo groupadd minio
   sudo useradd -g minio minio
   

   然后设置 2 中目录的权限：

   sudo chown -R minio:minio /xxxxx/data
   

4. 启用和启动服务

   systemctl enable minio.service
   systemctl start minio.service
   

5. 访问：http://IP:9001

gitlab-runner 的 config.toml 配置

修改 cache 相关的配置：

  [runners.cache]
    Type = "s3"
    Shared = true
    [runners.cache.s3]
      ServerAddress = "IP:9000"
      AccessKey = "USER"
      SecretKey = "PASSWORD"
      BucketName = "gitlab-runner"
      Insecure = true