创建的docker镜像将运行perl脚本，该脚本使用pm2命令在内部触发节点服务器。
使用dockerfile
创建的图像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。但在脚本完成后退出。
[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
您可以看到上面它正在运行并暴露给3个端口。但它在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
以下是容器日志的输出
[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'
答案 0 :(得分：1)
问题是你的入口点在它完成时退出，即使后台运行守护进程也是如此。例如，如果您创建一个启动perl脚本的bash脚本，然后启动某个日志的尾部-f（您的节点日志或应用程序日志）并将其用作入口点，您将看到您的容器保持运行状态。
答案 1 :(得分：0)
谢谢大家的回答。
在dockerfile的CMD行中添加pm2日志（运行守护进程来检查应用程序的状态）修复了这个问题。
CMD perl build_scripts/devdeploy.pl; pm2 logs