[Dev] Winston / 1984 is feeling sad
Luke Shumaker
lukeshu at lukeshu.com
Fri Nov 17 05:21:40 GMT 2017
TL;DR: 1984 is having issues with some of their infrastructure, I've
removed one of their DNS servers that seems down from
winston.parabola.nu's network config.
The process:
- Try to install something with pacman
- Get timeouts
- Discover that repomirror is taking 5-10 seconds to respond to each
request
- Log on to winston, notice that repomirror is leaking memory, and
eating all the swap
- Restart repomirror at winston
- Still slow
- Profiling says waiting for
<https://www.parabola.nu/mirrors/status/tier/1/json/> is taking the
time
- Log on to proton, see nothing obvious, but things are slow
- See most of the swap space belongs to uwsgi processes; restart all
uwsgi services on proton, see better iowait / latency
- Verify that the mirrors json URL now comes back quickly
- repomirror still slow
- Mirrors json URL is only slow *from winston*.
- ping says connection between winston and proton is plenty fast, but
took a while to say it
- Verify that DNS lookup of www.parabola.nu is what is slow (winston
uses 1984's DNS)
- Try to log in to 1984 management panel to see what's up
- Can't log in, get "Sorry, but it seems the backend server is
feeling sad." from 1984's site.
- See in winston's /etc/netctl/... that there are 2 DNS servers
configured. Ping them each.
- One seems to be totally down, the other seems fine.
- Comment out the down one, reload net configuration
- Everything seems happy now
- Notice pbot is offline, assume bad DNS killed him, restart him
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--
Happy hacking,
~ Luke Shumaker
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