我们使用docker 执行器时发现每次，构建都会去拉取基础镜像，这样很费时间

这种情况，我们可以通过修改，runner的配置实现本地存在镜像时，不再去下载镜像
首先找到runner的配置文件

[root@origin _data]# docker ps
CONTAINER ID   IMAGE                                 COMMAND                  CREATED         STATUS             PORTS     NAMES
3db1ac8dbf0e   b96bd51a5387                          "/usr/local/bin/mvn-…"   3 minutes ago   Up 3 minutes                 runner--tnccsb4-project-2-concurrent-0-9fb86bb61ae060b9-build-3
c66580bf739d   gitlab/gitlab-runner:alpine-v14.2.0   "/usr/bin/dumb-init …"   4 days ago      Up About an hour             gitlab-runner
[root@origin _data]# docker inspect c66
在容器详情里面找到对应的目录
"Mounts": [
            {
                "Type": "volume",
                "Name": "docker-compose_gitlab-runner-config",
                "Source": "/var/lib/docker/volumes/docker-compose_gitlab-runner-config/_data",
                "Destination": "/etc/gitlab-runner",
                "Driver": "local",
                "Mode": "rw",
                "RW": true,
                "Propagation": ""
            },

去到这个目录

[root@origin _data]# cd /var/lib/docker/volumes/docker-compose_gitlab-runner-config/_data
[root@origin _data]# ll
total 4
drwx------. 2 root root   6 Aug 23 13:07 certs
-rw-------. 1 root root 563 Sep  9 00:21 config.toml
[root@origin _data]# 

就是这个 config.toml，打开

[root@origin _data]# vim config.toml 

concurrent = 1
check_interval = 0

[session_server]
  session_timeout = 1800

[[runners]]
  name = "docker-runner"
  url = "http://gitlab.kalpana.top:9080/"
  token = "-tNcCsB4AKyK-W6juJS8"
  executor = "docker"
  [runners.custom_build_dir]
  [runners.cache]
    [runners.cache.s3]
    [runners.cache.gcs]
    [runners.cache.azure]
  [runners.docker]
    tls_verify = false
    image = "alpine:latest"
    privileged = false
    disable_entrypoint_overwrite = false
    oom_kill_disable = false
    disable_cache = false
    volumes = ["/cache"]
    shm_size = 0

加上

pull_policy="if-not-present"

再次执行流水线任务，可以看到已经没有去下载镜像了

开启Debug模式

官方文档

1. 暴露runner端口 8093

version: '3.8'
services:
  gitlab-runner:
    image: gitlab/gitlab-runner:v14.1.0
    container_name: gitlab-runner
    restart: always
    ports:
    - '8093:8093'  
    volumes:
    - '/var/run/docker.sock:/var/run/docker.sock'
    - 'gitlab-runner-config:/etc/gitlab-runner'
volumes:
  gitlab-runner-config: {}

2. 修改配置

[root@origin docker-compose]# cd /var/lib/docker/volumes/docker-compose_gitlab-runner-config/_data
[root@origin _data]# vim config.toml

在session_server 节点下增加listen_address ,advertise_address

[session_server]
  session_timeout = 1800
  listen_address = "[::]:8093"
  advertise_address = "192.168.0.103:8093"

3. 重启runner
4. 再触发流水线可以看到，已经有Debug入口了，在任务执行期间，可以通过这里进入当前runner内部，查看任务具体详情