Hi, I’m just getting started with Docker, so apologies in advance if this seems silly.
I used to self-host multiple services (RSS reader, invoicing software, personal wiki) directly on a VPS using nginx and mariadb. I messed it up recently and am starting again, but this time I took the docker route.
So I’ve set up the invoicing software (InvoiceNinja), and everything is working as I want.
Now that I want to add the other services (ttrss and dokuwiki), should I set up new containers? It feels wasteful.
Instead, if I add additional configs to the existing servers that the InvoiceNinja docker-compose generated (nginx and mysql), I’m worried that an update to Invoiceninja would have a chance of messing up the other setups as well.
It shouldn’t, from my understanding of how docker containers work, but I’m not 100% sure. What would be the best way to proceed?
It will as far as runtime resources
You can (and should) just use the one MySQL container for all your applications. Set up a different database/schema for each container
I’m getting conflicting replies, so I’ll try running separate containers (which was the point of going the docker way anyway - to avoid version dependency problems).
If it doesn’t scale well I may just switch back to non-container hosting.
To elaborate a bit more, there is the MySQL resource usage and the docker overhead. If you run two containers that are the same, the docker overhead will only ding you once, but the actual MySQL process will consume its own CPU and memory inside each container.
So by running two containers you are going to be using an extra couple hundred MB of RAM (whatever MySQL’s minimum memory footprint is)