Multiple containers vs One container with multiple services

[janvv]

I was wondering what is better from the perspective of resources and memory usage: having a single container or VM to run multiple services on, or running separate containers.
For example: I want to run a gitlab server, a plex server and a web server. I can configure them separately in their own container. Or I can make one virtual machine in which I install everything.
What are the pros and cons of both approaches?

 

[LnxBil]

What are the pros and cons of both approaches?

Separation of concerns

 

[janvv]

Separation of concerns

Good point!

As a newbee proxmox user I noticed that the load on the server is not that bad when you have multiple containers and VMs running.
Only the memory usage of the Turnkey Gitlab container is staying quite high, even when I am not using git at all.

 

[LnxBil]

Only the memory usage of the Turnkey Gitlab container is staying quite high, even when I am not using git at all.

Yeah, but that is GitLab problem, not a PVE problem. GitLab uses Ruby on Rails and has a ton of additional daemons around it, so a minimum of e.g. 2-4 GB is normal.