Is there a way to have a docker container wait for an external call?

Question

I have looked for a bit on Stack Overflow for a way to have a container start up and wait for an external connection but have not seen anything.

Here is what my process looks like currently:

1. Non-Docker external process reaches out at X interval and tells system to run a command.
2. Command runs.
3. System should remain idle until the next interval.

Now I have seen a few options with --wait or sleep but I would think that would not allow the container to receive the connection.

I also looked at the wait for container script that is often recommended but in this case I need the container to wait for a script to call it on non defined intervals.

I have tried having this just run the help command for my process but it then fails the container after a bit of time and makes it a mess for finding anything. Additionally I have tried to have the container start with no command just to run the base OS and wait for the call but that did not work either.

Answer 1

I was looking at this wrong. Ended up just running like any other webserver and database server.