[CollEc] PetalBot

[Thomas Krichel]

  I have just dogged another crisis.

  Seemingly PetalBut make requests at accelerating speed. Then we hit
  a problem where I may not be able to kill nginx

root at helos ~ # systemctl stop nginx
Failed to allocate directory watch: Too many open files

  After that,

root at helos ~ # ps axf | grep nginx
 804800 pts/2    S+     0:00      \_ grep nginx

  so it may not run any more, but repeating the nginx shoutdown shows
  the same warning

  And then, a few minutes after that, helos starts runing again.
  I added

   # case sensitive matching
   if ($http_user_agent ~ (PetalBot)) {
      return 403;
   }

  to

/etc/nginx/sites-available/collec.repec.org

  That may keep them out. Then killing the containers (????)

root at helos ~ # killall -9 containerd-shim-runc-v2

   and

root at helos ~ # systemctl start nginx

-- 
  Written by Thomas Krichel http://openlib.org/home/krichel on his 21163rd day.