Help with post-tutorial steps to create image

[canadaguy]

I’m new to Docker, and I just went through the tutorial/labs here:

I understand what it can do, but not how to continue beyond what is in the tutorial.

I’m interested in using Docker to deploy an application to a cloud based virtual machine. I’m not interested in the modular nature of Docker right now, I would like to deploy my application as a single unit to avoid setting up the virtual machine each time. I currently combine ‘cloud-init’ and shell scripts to automate the setup. After the application use is done, the VM gets deleted while waiting for the next job.

I want:

nginx
Django Daphne (WebSocket server)
certbot (for TLS certificate)
Python >= 3.7.3

I see that there are Python images, and nginx images, etc. but I will never (in the foreseeable future) use them independently…I’ll focus on that later. I would like nginx to bind to 80 and 443 so the user doesn’t need to worry about ports when connecting.

I saw this post:

Docker with multiple apps in container

There’s nothing wrong with this, so long as it fits on the system you have. It sounds like your current system is filling up, so you might consider getting a bigger system (easier if it’s a cloud system) or splitting workloads up into multiple systems. One easy first step could be to move the databases on to dedicated hosts (or hosted cloud services). This can be a good idea because they’re often the “bottom” of the dependency stack, their data is actually critical, and updates to their soft…

As far as scalability is concerned, the app will be deployed to a virtual machine of appropriate size. If more CPUs are needed, just delete and run on a new VM. The idea is to have no persistent data aside from the base configuration needed to deploy.