如何在不退出的情况下运行docker镜像（nodejs服务器）
创builddocker镜像，运行perl脚本，使用pm2命令在内部触发节点服务器。
使用dockerfile创build的映像
FROM rm/node:4.0 EXPOSE 3000 EXPOSE 3030 EXPOSE 7030 WORKDIR /Reader_Manager/SISPlatform CMD perl build_scripts/devdeploy.pl 当我使用下面的命令在后台运行图像时，它正在执行脚本。 但脚本完成后退出。
[dkanagaraj@localhost docker_test]$ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE rm/node 8.0 716f9b91b9f2 23 minutes ago 1.376 GB rm/node 7.0 805fced7c1c8 3 hours ago 1.376 GB rm/node 6.0 4b0746c90363 3 hours ago 1.376 GB rm/node 5.0 912588196f44 7 hours ago 1.376 GB rm/node 4.0 22d40a764333 3 days ago 1.376 GB rm/node 3.0 dc344c502819 3 days ago 999.1 MB rm/node 2.0 bee03055f04c 3 days ago 824.7 MB rm/node 1.0 b9fa60c9f544 3 days ago 488.8 MB docker.io/centos latest a65193109361 3 days ago 196.7 MB [dkanagaraj@localhost docker_test]$ docker run -d rm/node:8.0 a2d1780ce3dcf102fd2a0eb4d6632f6934f8c0a5362e0312b117e8da77c1c242 Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning. [dkanagaraj@localhost docker_test]$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a2d1780ce3dc rm/node:8.0 "/bin/sh -c 'perl bui" 8 seconds ago Up 7 seconds 3000/tcp, 3030/tcp, 7030/tcp goofy_brattain
你可以在上面看到它正在运行并暴露到3个端口。 但是在perl脚本结束后退出。
[dkanagaraj@localhost docker_test]$ docker ps -a |head -2 CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES a2d1780ce3dc rm/node:8.0 "/bin/sh -c 'perl bui" 9 minutes ago Exited (0) 8 minutes ago goofy_brattain
以下是从容器日志输出
[dkanagaraj@localhost docker_test]$ docker logs a2d1780ce3dc |tail -25 [PM2][WARN] No process found npm WARN package.json Dependency 'chai' exists in both dependencies and devDependencies, using 'chai@^3.5.0' from dependencies npm WARN package.json Dependency 'nodemon' exists in both dependencies and devDependencies, using 'nodemon@^1.8.1' from dependencies npm WARN cannot run in wd sis-helpdesk@1.0.0 node postinstall.js (wd=/Reader_Manager/SISPlatform/Auth) npm WARN package.json rm@1.0.0 No description npm WARN package.json rm@1.0.0 No repository field. npm WARN package.json rm@1.0.0 No README data npm WARN package.json Dependency 'underscore' exists in both dependencies and devDependencies, using 'underscore@^1.8.3' from dependencies npm WARN package.json rm@1.0.0 No description npm WARN package.json rm@1.0.0 No repository field. npm WARN package.json rm@1.0.0 No README data ┌─────────────┬────┬──────┬─────┬────────┬─────────┬────────┬─────────────┬──────────┐ │ App name │ id │ mode │ pid │ status │ restart │ uptime │ memory │ watching │ ├─────────────┼────┼──────┼─────┼────────┼─────────┼────────┼─────────────┼──────────┤ │ AuthServer │ 0 │ fork │ 74 │ online │ 0 │ 2s │ 63.191 MB │ disabled │ │ SISRMServer │ 1 │ fork │ 107 │ online │ 0 │ 1s │ 63.355 MB │ disabled │ │ SEOSServer │ 2 │ fork │ 138 │ online │ 0 │ 0s │ 13.957 MB │ disabled │ └─────────────┴────┴──────┴─────┴────────┴─────────┴────────┴─────────────┴──────────┘ Use `pm2 show <id|name>` to get more details about an app [Output] - Successfully executed 'npm run-script dev-server-linux' inside '/Reader_Manager/SISPlatform/SEOS-TSMWrapper' [Output] - Current working directory is /Reader_Manager/SISPlatform [Output] - Checking the errors in the logs '/Reader_Manager/SISPlatform/logs/pm2/err' [Output] - No error in the log '/Reader_Manager/SISPlatform/logs/pm2/err/auth_error-0.log' [Output] - No error in the log '/Reader_Manager/SISPlatform/logs/pm2/err/seos_error-2.log' [Output] - No error in the log '/Reader_Manager/SISPlatform/logs/pm2/err/sisrm_error-1.log'
问题在于，即使在后台运行守护进程，您的入口点也会退出。 例如，如果您创build一个启动perl脚本的bash脚本，然后启动某个日志（您的节点日志或应用程序日志）的尾部-f并将其用作入口点，则会看到您的容器保持运行状态。
谢谢大家的答案。
在dockerfile的CMD行中添加pm2日志（运行守护进程以检查应用程序的状态）修复了问题。
CMD perl build_scripts/devdeploy.pl; pm2 logs