[cpuguy83]

Depends on in high-performance is what you need, but this was just an example of even the container FS can have incredible integrity.

Why would a container keep from using mirrored sets of SSDS, RAM, or an LB?

The absolute worst case you can set these up manually on your host and map the directories into the container.

A better scenario, the various storage systems (EMC, NetApp, Ceph, name it) out there have volume plugins integrating with Docker, Kub, etc.

How to handle storage in the container depends on your needs, just like as if it was VM or a physical machine... and ultimately the setup is in the worst of cases no different.