I am very new to using docker. I have been used to using dedicated VM’s and hosting the applications within the servers OS.
When hosting multiple applications/services that require the same port, is it best practice to spin up a whole new docker server or how should I go about the conflicts?
Ie. Hosting multiple web applications that utilize 443.
Thank you!
Hi there,
thats an interesting question. I suppose it depends on what you need to do.
If you can, divert the ports in the run command or compose file with -p 4430:443 (run) Or Ports:
Then you tell the apps that need this port to use that one instead.
Thats the easiest solution I know of.
If you want a more elegant solution, you use custom domains with a reverse proxy like npm (nginx proxy manager).
You spin up npm and start defining hosts like cloud.yourhomedomain.com and define those over your dns if possible (router or in my case, pihole)
Docker is a universe of itself and you can invest hundreds of hours and still feel like a noob (good game mechanic btw, easy go get into, hard to master).
Hit me up if you need more info. Get familiar with stack overflow and the likes because you will need em. :)
Good luck
Thanks a ton! I did not realize you could have a different listing port vs internally used port.
I have done what you mentioned and used a random port internally and kept 443 as the listening port. I am using Caddy to then direct the traffic reverse proxy it.
Thanks again!
You are very welcome! Let me know if you need anything else.
This is the correct answer.
I run several containers that offer up http/s and they obviously can’t all use 80/443. Just adjust the left side of that port setting and you’re good.
That plus a reverse proxy for offering these services up over the public internet, if you choose to do so, is a killer pair.
One addition to this: I actually run those in my private setup since I have highly sensitive data on there. Even if you’re not opening them, reverse proxy works wonders. :)