Docker how best to separate containers?

Question

ASP.NET

Hello.

I have a web application, API (ASP NET CORE) + monga, I divided them into containers and launched everything - everything seems to be fine, but I don’t want to make mistakes that will later come out sideways.

1) The monga image was obtained from here https://hub.docker.com/_/mongo
in their examples there is not a word about the fact that Volumes needs to be thrown in order not to lose data after a reboot. At the beginning, I messed up, and then I decided to try as they suggested in the examples, and lo and behold, reloading the container does not delete the database data. Do I have a risk of losing the database? how to do it anyway?

2) from the api, I access the database not at the local address, but through the external IP, am I losing something? whether it is necessary to do through local access?

3) How to properly update the working container? how can i automate this for google cloud?
now I manually delete the image, download a new one, delete the container, start a new one

4) Is it worth leaving the previous container to return? or can I 100% trust docker to work?
if everything was ok on the virgin, then it will be ok in the sale?

Answer 1

You can lose the base in the cloud at any time, for this you need to make a backup)
What's the difference from there you took the image, volumes, etc., you still throw it yourself