Write 'survival guide' for keeping metrics website up
opara pointed out today that metrics.torproject.org was returning 503's.
I logged in to the server, saw that the server and apache were working fine, found a proxypass stanza in the apache config, noticed that there was a /home/metrics/, and looked through the end of /home/metrics/.bash_history to make some guesses about what to run to get things working again. It seems to be back and working (I did a "sudo -s -H -u metrics" because I saw karsten had run that, and then "./start-web.sh" and eventually decided to background it when it never exited.)
It would be great to make a 'survival guide' wiki page for it, like
https://gitlab.torproject.org/tpo/metrics/team/-/wikis/Survival-Guides/Exit-Scanner
And then link to it from tpo/tpa/team#40045 (closed) so we can use it next time.
Thanks!