I have the following in my Dockerfile:
ENTRYPOINT ["/bin/wait-for", "wordpress:9000", "--"]
CMD nginx -g "daemon off;"
Which results in:
nginx_1 | Attempting...
nginx_1 | Command: /bin/sh -c nginx -g "daemon off;"
nginx_1 | Attempting to execute command:
nginx_1 | /bin/sh -c nginx -g "daemon off;"
ayurved_nginx_1 exited with code 0
I'm guessing the issues is the quotes...
How can I make it execute /bin/wait-for wordpress:9000 -- nginx -g "daemon off;"?
I have had a similar problem when using CMD in the exec form, aka JSON array.
The TL;DR is that there seems to be a fallback mechanism that introduces /bin/sh when the CMD items cannot be parsed correctly.
I could not find the exact rules but I have examples:
ENTRYPOINT ["reflex"]
CMD ["-r", ".go$"]
$ docker inspect --format '{{.Config.Cmd}}' inventories_service_dev_1
[-r .go$]
ENTRYPOINT ["reflex"]
CMD ["-r", "\.go$"]
$ docker inspect --format '{{.Config.Cmd}}' inventories_service_dev_1
[/bin/sh -c ["-r", "\.go$"]]
Notice that \ in above.