Description of problem:
Not sure why, but supercolony seems to take a long time to let me connect with ssh since a few days. I did look and can't see anything overly wrong.
Munin show some mail activity, but this should result into slowdown for login.
Looking at postfix log, it seems to not do g suspicious (even if we have postgrey message, so I did restart postgrey). I see nothing weird either on mailman log, no specific acitivty on I/O, network, or CPU.
Will look later
So log also stopped, so it might be related to that. (the syslog server seems to also be full...)
There is also a ton of errors:
Sep 22 12:59:19 supercolony postfix/smtp: certificate verification failed for aspmx.l.google.com[184.108.40.206]:25: untrusted issuer /C=US/O=Equifax/OU=Equifax Secure Certificate Authority
But the problem seems to be linked to rsyslog, I removed the logs export and now, everything is faster.
Ok so the log server is full, and it seems to slow down all servers sending something there.
So, ansible did reinstall the logs export and login on supercolony was slow again. I have cleaned (or rather) compressed the log on the syslog server. Seems for some reason to have generated lots of logs by itself in the past.
This is now fixed and I'm going to close the bug.