prometheus library for monitoring, which exports some basic resource
usage metrics by default, like number of goroutines, open file
descriptors, resident and virtual memory, etc. I've also started adding
in request counters and latency histograms, but have only added them to two
of our HTTP handlers. If this looks reasonable, I'll add them to the rest
in a second PR.
Add a route for /proxy/<kind>/<name>/ without requiring additional path
information. This allows for e.g. /proxy/service/myservice/, which will
proxy to the service at /, instead of always requiring something in the
path.
