Is there a maximum number of containers running on a Docker host?

Question

Basically, the title says it all: Is there any limit in the number of containers running at the same time on a single Docker host?

Answer 1

From a post on the mailing list, at about 1000 containers you start running into Linux networking issues.

The reason is:

This is the kernel, specifically net/bridge/br_private.h BR_PORT_BITS cannot be extended because of spanning tree requirements.