Sloth VS mtail

That said, after I learned about how to use lsof, I found this little free app called =Sloth (and its github page ), which is just a nice native Mac app serving as a GUI for lsof. It'll let you know exactly which process to quit or kill so your drive can eject happily.

Random fact; this website is created and maintained by Sveinbjörn Þórðarson who also made Platypus (https://github.com/sveinbjornt/Platypus) and Sloth (https://github.com/sveinbjornt/Sloth) — software that Mac nerds might be familiar with.

Sveinbjörn is a ball of energy that just radiates positives for human society.

git clone https://github.com/sveinbjornt/Sloth.git

a very nice, open source, app that provides similar functionality but also shows open files is Sloth (https://sveinbjorn.org/sloth).

Sloth will do what you need.

You can do that with something like mtail. Basically write expressions that match your logs and produce metrics.

mtail is a standard tool for this.

I use goflow2 to do something like this. I don't specifically use syslog itself for this, but mtail to generate the metrics.

I can recommend mtail. Here is a good example nginx script.

If not, https://github.com/google/mtail might be a good option.

Count the lines with mtail. You can regexp match the values out into labels.

If you want to extract whitebox metrics from logs, maybe all you need is mtail.

You can use mtail (https://github.com/google/mtail) for this. You'll need to figure out how to plug it into your setup, but mtail will do the metrics from logs thing.

Convert your logs to metrics with mtail.

For nginx, you'll need to setup a log parser like mtail because it doesn't really have much for metrics to begin with.