implemented track_process

[zerwes]

see https://manpages.debian.org/unstable/keepalived/keepalived.conf.5.en.html for the advantages of using track_process instead of pgrep/pidof/killall and the likes.
and according to my open source slogan 'you need it, you implement it' here is a PR introducing the configuration options for track_process

Greetings
Klaus

[evrardjp]

Sorry my comments were written a few weeks ago, but I didn't click send :(

[evrardjp]

LGTM - maps with what we discussed. A great addition to the role. I didn't test it manually.

[zerwes]

I didn't test it manually.

I use the changed version meanwhile in 2 new cluster setups and migrated a few old from using track_script with pgrepor kill to track_process ... looks good to me, even if I did not test all params. In one case I have now a slightly different behavior regarding preempt, but this is a matter of the config and not of the role

[evrardjp]

Sure, I was just mentioning this for my records :D - My memory is bad.

[evrardjp]

@zerwes FYI the new release is in github and in galaxy.ansible.com