add podAntiAffinity for masters in demo cfg, fix yqlAgent count for 0.9.1

[futujaos]

No description provided.

[futujaos]

without it, this error will appear:

The Ytsaurus "ytdemo" is invalid: spec.primaryMasters.affinity.podAntiAffinity: Required value: Masters should be placed on different nodes

i added fix to 0.9.1 and to file without version (is it latest version?), don't know if it's applicable to previous versions

[l0kix2]

Oh, hi, Oleg

[l0kix2]

@koct9i what do you think? Maybe ephemeralCluster should be set in this sample instead of antiaffinity if it is just for demo purposes?

[l0kix2]

Not sure if we should change 0.9.1 also, i guess it must be checked with 0.9.1 operator and maybe it doesn't have such check yet. Not sure if we even need samples for different versions (especially old ones), I guess we need to preserve latest and maybe some of the previous and update them on release (it would also be good to test them automatically).

[futujaos]

Maybe ephemeralCluster should be set in this sample instead of antiaffinity if it is just for demo purposes?

it's up to you (that is ephemeralCluster?), i just think there should be an example with multiple masters somewhere in docs, currently all examples contains only single master

[koct9i]

Probably we could resurrect default anti-affinity for masters (but not in form defaulter webhook) and adjust validation.

Also it would be nice to validate sample config in unit test