El jue, 23 de sep. de 2021 a la(s) 08:55, Aleix Pol (aleix...@kde.org) escribió: > > On Thu, Sep 23, 2021 at 11:52 AM Ben Cooksley <bcooks...@kde.org> wrote: > > > > Hi all, > > > > It has recently come to our attention that the number of queries being > > handled for the endpoint https://autoconfig.kde.org/ocs/providers.xml on a > > day to day basis has gotten to the point where it is causing issues with > > server responsiveness to other traffic. This is perhaps best summarised by > > the following: > > > > root@nicoda /var/log/apache2 # ls -lah ... > > -rw-r----- 1 root adm 458M Sep 23 06:25 autoconfig.kde.org.log.1 > > -rw-r----- 1 root adm 381M Sep 23 06:25 networkcheck.kde.org.log.1 > > -rw-r----- 1 root adm 143M Sep 23 06:25 www.kde.org.log.1 > > > > root@nicoda /var/log/apache2 # cat autoconfig.kde.org.log.1 | wc -l > > 4,222,343 > > > > Based on those numbers we're looking at 48-49 requests per second (on > > average - peaks are much higher by many magnitudes), which seems extremely > > excessive given that this file is only supposed to be retrieved by KDE > > software when GHNS functionality is triggered. That is supported by the > > substantial size difference it has over networkcheck.kde.org - which is > > used by plasma-nm and NetworkManager (on Neon) to check for whether they > > have a working internet connection - which i'd expect to be the site > > receiving the most traffic. > > > > As such, I therefore suspect we have bug(s) in software that makes use of > > GHNS functionality. > > > > It would therefore be appreciated if we could please review the software in > > question to determine whether it is operating correctly. Given that it > > usually runs in the background on user systems, i'd especially appreciate > > it if a detailed review could be conducted on Discover and other software > > that conducts package management operations or assists in managing updates. > > > > Unfortunately all these applications submit a fairly useless user agent > > (Mozilla/5.0) so it is impossible for Sysadmin to ascertain any further > > information. If we could get information on the software that is > > originating the request added to the user agent to assist in investigating > > these issues in the future that would be extremely helpful. > > > > Thanks, > > Ben > > That's correct. Discover fetches them at startup. It's necessary to be > able to check if there are updates on KNS-provided resources. > > Incidentally, I was looking into this yesterday incidentally. We > could see if caching is broken somehow. A request will still be needed > though to check if the cache is out of date.
Caching seems to be working, since the vast majority of the requests are returning 304 Not Modified. However in *many* cases I see a single IP making multiple requests in the same second, and doing it again the next minute. Here's one IP address picked randomly: [22/Sep/2021:06:25:41 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:25:41 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:25:41 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:25:41 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:27:57 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:27:58 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:27:58 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:32 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:32 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:32 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:32 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:59 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:59 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:59 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:28:59 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:30:11 +0000] "GET /ocs/providers.xml HTTP/1.1" 200 [22/Sep/2021:06:30:11 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:30:11 +0000] "GET /ocs/providers.xml HTTP/1.1" 200 [22/Sep/2021:06:30:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:30:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:30:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:30:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:19 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:19 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:19 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:19 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 [22/Sep/2021:06:31:38 +0000] "GET /ocs/providers.xml HTTP/1.1" 304 This continues for hours. And it's not an isolated case; again, the IP I searched for was a random one from the log. There are 120 IP addresses that *each* made more than 10,000 requests in a 24h period. I tried a few GHNS things on my own system and I couldn't reproduce it... -- Nicolás
