Increase default max pid limit

[haircommander]

Users were surprised by the suddenly low pid limit on their pods. Change the default to something higher, such as the theoretical maximum number of pids on a 32 bit system.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1696752

Signed-off-by: Peter Hunt pehunt@redhat.com

[rhatdan]

This will allow a couple of pods to cause DOS to other containers on the system. The reason the number was low was to allow lots of containers to run without one container using up all of the pids.

[haircommander]

@rhatdan @mrunalp what is a good default then? 8196?

[rhatdan]

@haircommander Hard to say.

[haircommander]

As a user not thinking about this feature, I'd expect my pods to have as many pids as possible. I.E. we should allow them to DOS their system. If they then decide that isn't good, they should change from the default.

[rhatdan]

@haircommander This feature was demanded by our customers, they wanted to make sure that we picked good defaults.