Docker to execute startup script after init

[tj5527]

After searching on the internet (https://hub.docker.com/_/centos/), I notice docker image based on centos7 requires some setup in order to get systemd working. Following that instruction, basically I can build the image without a problem.

However, with that configuration I can't execute startup script after CMD ["/usr/sbin/init"]. What additional steps are required in order to execute script after /usr/sbin/init?

Thanks

[gjaltemba]

Try using only your startup script as CMD[] and put /usr/sbin/init first in startup script.