gitlab-runner配置与注册

（1）启动gitlab-runner

#创建volume
docker volume create gitlab-runner-my-config
#docker启动runner 
docker run -d --name gitlab-my-runner --restart always --net=host \
    -v /var/run/docker.sock:/var/run/docker.sock \
    -v gitlab-runner-my-config:/etc/gitlab-runner \
    gitlab/gitlab-runner:latest
#查看挂载状态
docker inspect gitlab-my-runner
#版本查看
$ docker exec -it gitlab-my-runner gitlab-runner -version 
Version:      15.2.1
Git revision: 32fc1585
Git branch:   15-2-stable
GO version:   go1.17.9
Built:        2022-07-26T21:21:20+0000
OS/Arch:      linux/amd64
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（2）注册gitlab-runner 到git服务器上
查看注册token
root登录->菜单->管理员->概览->Runner->注册一个实例runner
路径http://gitlab.example.com/admin/runners

此处的url为gitlab的ip或者域名；registration-token为界面查询到的注册令牌token；

docker exec gitlab-my-runner gitlab-runner register -n \
       --url http://192.168.188.134/ \
       --registration-token Tz7Uspg1dZ1sLYsb-qUf \
       --tag-list runInDk \
       --executor docker \
       --docker-image docker \
       --docker-volumes /root/.m2:/root/.m2 \
       --docker-volumes /root/.npm:/root/.npm \
       --docker-volumes /var/run/docker.sock:/var/run/docker.sock \
       --description "runInDk"
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结果如下：

（3）查看注册工程的runner以及修改对应的配置；
root登录->修改运行未标记的作业；这样没有标签的作业也就可以运行；

（4）demo项目的运行

1. 创建一个空表项目；
   
2. 新建一个ci/cd
   ci/cd ->选择分支-》配置流水线->直接默认->点击提交
   
3. 结果查看
   查看结果，问题为域名无法解析

Running with gitlab-runner 15.2.1 (32fc1585)
  on runInDk 6x_3_-dC
Preparing the "docker" executor
00:07
Using Docker executor with image docker ...
Pulling docker image docker ...
Using docker image sha256:87452597cd172fae96865ec2275a5c0ee110511a896d3b439aec6a92592fe9d9 for docker with digest docker@sha256:0c4066e2407fb67b5cb609aa2ea380cdd774445e6be1cd651096167963125af5 ...
Preparing environment
00:01
Running on runner-6x3-dc-project-5-concurrent-0 via localhost.localdomain...
Getting source from Git repository
00:02
Fetching changes with git depth set to 20...
Initialized empty Git repository in /builds/gitlab-instance-a7f43c36/test-my-runner/.git/
Created fresh repository.
fatal: unable to access 'http://gitlab.example.com/gitlab-instance-a7f43c36/test-my-runner.git/': Could not resolve host: gitlab.example.com
ERROR: Job failed: exit code 1
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解决办法如下：
在容器的/etc/gitlab-runner/config.toml 中添加参数指定http://gitlab.example.com的ip（extra_hosts = [“gitlab.example.com:192.168.188.134”]）
因为容器中没有vim工具，所以就在容器外面直接修改配置文件，修改完之后重启容器；步骤如下：

步骤一、查看在本地的映射位置：

docker volume inspect gitlab-runner-my-config

[
    {
        "CreatedAt": "2022-08-16T16:01:14+08:00",
        "Driver": "local",
        "Labels": {},
        "Mountpoint": "/var/lib/docker/volumes/gitlab-runner-my-config/_data",
        "Name": "gitlab-runner-my-config",
        "Options": {},
        "Scope": "local"
    }
]

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步骤二、修改配置新增 extra_hosts = [“gitlab.example.com:192.168.188.134”]

[root@localhost .ssh]# cat /var/lib/docker/volumes/gitlab-runner-my-config/_data/config.toml
concurrent = 1
check_interval = 0

[session_server]
  session_timeout = 1800

[[runners]]
  name = "runInDk"
  url = "http://192.168.188.134/"
  token = "xxxxxx"
  executor = "docker"
  [runners.custom_build_dir]
  [runners.cache]
    [runners.cache.s3]
    [runners.cache.gcs]
    [runners.cache.azure]
  [runners.docker]
    tls_verify = false
    image = "docker"
    privileged = false
    disable_entrypoint_overwrite = false
    oom_kill_disable = false
    disable_cache = false
    volumes = ["/root/.m2:/root/.m2", "/root/.npm:/root/.npm", "/var/run/docker.sock:/var/run/docker.sock", "/cache"]
    shm_size = 0
    extra_hosts = ["gitlab.example.com:192.168.188.134"]

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步骤三：容器重启

 docker restart gitlab-my-runner
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再次执行查看执行结果。

参考：Gitlab runner docker Could not resolve host
https://stackoverflow.com/questions/50325932/gitlab-runner-docker-could-not-resolve-host
https://docs.gitlab.com/runner/install/docker.html
https://docs.gitlab.com/runner/register/index.html#docker