Measure how often PAWS stays up / goes down.
More along those lines. Going to paws.wmflabs.org by itself seems to work consistently, but the Start My Server button works inconsistently and I'd like to begin tracking when it works and when it doesn't.
@Andrew Thanks for the merge. I can't verify the resulting file due to permissions, but since puppet has run in tools-prometheus-01 and the log indicates /srv/prometheus/tools/prometheus.yml should now have the new paws-hub target should be set up correctly. https://tools-prometheus.wmflabs.org/tools/targets still does not have it. Perhaps a prometheus service reload/restart is needed?