7 Jul
2014
7 Jul
'14
2:24 p.m.
Hi Paul,
On Mon, Jul 07, 2014 at 02:01:11PM +0100, Paul Stimpson wrote:
I'm not sure if there is a problem but for the
last couple of months,
I've been seeing about 1 NAGIOS alert a week and various VPN problems
that seems to say that there may be intermittent connectivity issues
within the cluster.
Possibly, but:
I'm seeing SSH warnings most commonly that my VOS
is uncontactable
even though I was logged in during some of them.
I see SSH alerts all the time across all VPSes that have monitoring
enabled. This appears to be due to slow SSH dictionary attacks
filling up all MaxStartups slots:
http://crunchtools.com/systems-administrators-lab-openssh-maxstartups/
I suspect if you put sshd on a different port or increase
MaxStartups then that issue will go away.
I had a 10 hour backup file age NAGIOS warning today.
In the early hours of this morning a single customer VPS which was
in an OOM death spiral made the backup system get stuck on it and no
one else's backups (for that schedule on that backup server, which
is about 10 of you, including you) got done after that.
I got the process unstuck about an hour ago and so RECOVERY notices
will be arriving now for those affected.
I've also recently seen my VPN dropping out much
more frequently
than usual.
This I do not know about.
Cheers,
Andy
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