gitlab uses CI/CD

The first step: Find a machine, if there is no curl command, execute the installation command:

sudo apt-get install curl

Step 2: Install gitlab runner on the machine and execute the command:

sudo curl -L --output /usr/local/bin/gitlab-runner https://gitlab-runner-downloads.s3.amazonaws.com/latest/binaries/gitlab-runner-linux-amd64
# 这里安装gitlab-runner 只是下载了一个二进制文件，会造成一个问题，当机器关机或者重启，再次启动gitlab-runner的时候，gitlab-runner启动报错，可以把这个当成一次性服务的东西，类似于docker，
# 如果想一劳永逸解决这个问题，sudo apt-get install gitlab-runner

Note: The machine system and version are different, and the runner installed is also different. For details, please refer to the official:

https://docs.gitlab.com/runner/install/
Step 3: Grant its execution permissions

sudo chmod +x /usr/local/bin/gitlab-runner

Step 4: Create a gitlab CI user

sudo useradd --comment 'GitLab Runner' --create-home gitlab-runner --shell /bin/bash

--comment 'xxxxx'
'xxxxx'代表注解
如果想要设置用户名和密码，用例如下：
--comment 'xxxxx' xw --password 123456
xw 代表用户名
123456 代表暗文密码（我认为设不设置都可以，后期可以更改可以使用的密码）
查看所有用户密码：sudo cat /etc/shadow
但是我们看到的123456是加密后的，若想改成能够使用的密码，sudo passwd xu
接下来输入密码

--create-home
创建用户目录

Step 5: Install and run as a service

sudo gitlab-runner install --user=gitlab-runner --working-directory=/home/gitlab-runner
sudo gitlab-runner start
# 关闭 gitlab-runner服务：sudo gitlab-runner stop 

Step 6: Check the running status of gitlab-runner

sudo gitlab-runner status

Step 7: Register runner

sudo gitlab-runner register

The result after executing the registration command,

and then enter the CI/CD Runner in the corresponding git project setting to view the result: it

indicates that the association has been successful. At this time, add the .gitlab-ci.yml file to the project

注意：
如果CI/CD的job一直是Pending状态，需要做以下操作：

For example, perform flake8 code specification checks:

stages:
  - pep8
  - build

# PEP8 检查
pep8:
  stage: pep8
  script:
    - flake8

When the code is standardized: When the

code is not standardized:

Even if such a basic CI process is completed, the CI process will be checked automatically every time the code is updated.