Docker如何在启动时运行/ usr / sbin / init以及其他脚本 [英] Docker How to run /usr/sbin/init and then other scripts on start up

问题描述

Dockerfile

Dockerfile

FROM centos:7
COPY docker-entrypoint.sh /data/
ENTRYPOINT ["/data/docker-entrypoint.sh"]

docker-entrypoint.sh

docker-entrypoint.sh

exec /usr/sbin/init && systemctl restart autofs %% python /data/myapp.py

我需要运行 / usr / sbin / init 作为第一个命令，然后运行后续命令，例如 systemctl restart autofs 和 python myapp。 py

I need to run /usr/sbin/init as the first command then run subsequent commands such as systemctl restart autofs and python myapp.py

我似乎无法在docker-entrypoint.sh内完成所有工作，因为 / usr / sbin / init 不返回

I cant seem to get all working inside docker-entrypoint.sh because /usr/sbin/init does not return

如果我将docker-entrypoint.sh更改为

if i change docker-entrypoint.sh to

/usr/sbin/init &
systemctl restart autofs && python /data/myapp.py

由于d-bus错误而失败

it fails with error in d-bus

我该怎么办，所以容器运行 / usr / sbin / init ， systemctl重新启动autofs 和 python /data/myapp.py 在执行 docker run时按此顺序？

what can i do so the container runs /usr/sbin/init, systemctl restart autofs and python /data/myapp.py in that order when "docker run" is executed?

在执行 / usr / sbin / init 之后，还有其他方法可以运行命令吗？
我尝试将systemctl作为CMD放置在Dockerfile中

Is there any other ways to run commands after /usr/sbin/init is executed? i've tried putting systemctl as CMD in Dockerfile

FROM centos:7
ENTRYPOINT ["/usr/sbin/init"]
CMD ["systemctl restart autofs"]

但是CMD永远不会执行

but CMD is never executed

推荐答案

声明

ENTRYPOINT ["/usr/sbin/init"]
CMD ["systemctl"]

将导致：

/usr/sbin/init systemctl

换句话说， ENTRYPOINT 指令设置可执行文件，该可执行文件用于执行从 COMMAND 指令。

In other words, the ENTRYPOINT directive sets the executable which is used to execute the command given from the COMMAND directive.

默认 ENTRYPOINT 为 / bin / sh -c ，因此 / bin / sh -c /data/docker-entrypoint.sh 应该可以工作，如果 /data/docker-entrypoint.sh 包含：

The default ENTRYPOINT is /bin/sh -c so /bin/sh -c /data/docker-entrypoint.sh should work, if /data/docker-entrypoint.sh contains:

/usr/sbin/init
systemctl restart autofs
python /data/myapp.py

意思s：您不必更改 ENTRYPOINT

如果更改 ENTRYPOINT 到 /data/docker-entrypoint.sh ，它应该包含以下内容：

If you change the the ENTRYPOINT to /data/docker-entrypoint.sh than it should contain something like:

/usr/sbin/init
systemctl restart autofs
python /data/myapp.py
# run the command given as arguments from CMD
exec "$@"

参考

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