如何在 GitLab CI 中优雅地终止以 'npm start' 开头的监听 npm 应用程序？

Question

应用程序使用 .gitlab-ci.yml 文件中的 npm start 命令启动。该应用程序的配置方式使其在定义的端口上侦听连接。因此，上面的命令永远不会停止，从而阻止执行 CI 文件中的其他步骤。

我试图用 (timeout 30s npm start; exit 0) 命令停止服务器，但它 return 的代码仍然是 1，并且管道失败：

$ (timeout 30s npm start; exit 0)
 > app-srv@1.0.0 start /builds/app/frontend_server
 > nodemon server.js
 [nodemon] 2.0.4
 [nodemon] to restart at any time, enter `rs`
 [nodemon] watching path(s): *.*
 [nodemon] watching extensions: js,mjs,json
 [nodemon] starting `node server.js`
 listening on *:4000
 ERROR: Job failed: exit code 1

有没有办法 return 代码 0 并执行下一步？

Answer 1

这是一种解决方法，但在我的案例中确实有效：

- timeout 20s npm start > npm_start.log || FAILED=true  # if it fails, the variable is set up
- grep -e 'listening on \*:4000' npm_start.log  # if 'listening...' is in the output,
                                                # it means the server started successfully;
                                                # if not, the pipeline fails at this point
- if [ "$FAILED" == "true" ]; then exit 0; fi  # variable gets checked, status 0 is ensured

如何在 GitLab CI 中优雅地终止以 'npm start' 开头的监听 npm 应用程序？

How to elegantly terminate listening npm app started with 'npm start' in GitLab CI?

continuous-integration

gitlab

gitlab-ci