Write logs to /var/log/kibana

[chewi]

/etc/sv/kibana/log/main is a very odd place to write logs. Although the runit manual mentions ./main as an example, the runit cookbook uses /var/log/<service> if you enable the default logger. The log template in this cookbook is otherwise identical to the default so we may as well remove it.

We were spammed with email and Jabber messages every time someone clicked something in Kibana after turning our OSSEC syscheck on. We will have to ignore /etc/sv anyway because of other runit files but logs really shouldn't go here.

[chewi]

I just noticed that the elkstack cookbook duplicates much of the install recipe and I don't have time to find out why but the default_logger true line will also be required there if this gets merged.

[martinb3]

This looks like a breaking change for folks using the cookbook. Unless you think it's a bug?

[chewi]

The removal of the template does break the elkstack cookbook as it stands. Other than that, it doesn't have a big impact. New logs just get written somewhere else.