Limit size of audit log

[oprudkyi]

What Happened?

after updating to v1.26 spotted the slowness of 'minikube kubectl' command
investigation shows that audit.json was greater 5mb and that causes real slowness for every command

>time minikube options
minikube options  16.86s user 2.37s system 266% cpu 7.219 total

deletion of audit.json speedup things considerably

minikube options  0.03s user 0.03s system 91% cpu 0.064 total

probably audit.json should have limit on max size and truncated when needed

Operating System

Redhat/Fedora

Driver

Docker

[afbjorklund]

It should only be slower the first time after a Kubernetes version upgrade, while the client binary (kubectl) is being downloaded... After that, it should be cached and the same as running it directly.

[oprudkyi]

wierd, but even simple commands like

minikube options  16.86s user 2.37s system 266% cpu 7.219 total

freeze

visually it looks like command by sefl was executed properly (with all output) and then some sort of finalizers keep running for some time

[oprudkyi]

deletion of /home/user/.minikube/logs/* helped, autdit.json file was something like 5mb and probably updating of that file created such slow work

[spowelljr]

Can confirm it takes a while with a large audit file, I'm going to find exactly what part is taking a long time and see if I can optimize any, will likely cap the log count as well