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chroming/run_cmd_after_docker_run.md

Created March 31, 2021 04:02
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docker-compose启动后执行命令
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run_cmd_after_docker_run.md

如果想在已有的image运行container后执行命令，又不想自己写一个dockerfile重新打包镜像，可以用healthcheck实现。

比如基于官方salt-master镜像，在启动后自动sync_all:

    healthcheck:
      # Auto sync_all every 10s
      test: salt "*" saltutil.sync_all
      interval: 10s
      start_period: 10s

存在的问题是healthcheck会定时执行，如果只想执行一次可以参考 https://stackoverflow.com/questions/63112803/how-to-execute-docker-health-check-only-one-time 。

参考资料：

https://docs.docker.com/compose/compose-file/compose-file-v2/#healthcheck docker/compose#1809

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