Only parse/calculate the last line/match? about grok_exporter

[fstab]

So far, grok_exporter used to measure the sum of all observed values for gauge values. But reading your question I concluded the current implementation does not really make sense. So I changed the implementation, so that gauge metrics measure the last observed value by default. I also introduced an optional configuration cumulative that can be used to go back to the previous behaviour. I committed the changes so the new behaviour is implemented if you build grok_exporter from source. I will review the changes tomorrow and if everything looks fine, I will build a release with the new behaviour. Thanks for your question.

[valdisrigdon]

This is exactly what I was looking for! Thanks!

[fstab]

Just published rel 0.1.3 with the new gauge behaviour.