This is quite interesting. I see mails in the mail.log for the DOWN entries (there are two, one DOWN each for two test DB nodes), but none for any UP state changes. The UP state changes are logged in the haproxy.log file, just like the DOWN ones, so I don't see why the UP alerts isn't being sent out.
Ah well, I guess I'll hit up the HAPROXY list to see if they know anything.
Thanks for the help.
On Sat, May 14, 2016 at 7:02 PM, Cameron Simpson <cs@xxxxxxxxxx> wrote:
On 13May2016 09:46, Mark Haney <mark.haney@xxxxxxxxxxxxxx> wrote:
Hey all, I've got an odd problem with HAProxy 1.6.3 that I'm not sure where
to begin troubleshooting. I set up mailers for alerting when one of my DB
cluster nodes changes state. I'm getting the alerts for when a node goes
down (so mailing is working), but I'm not getting another one when that
node comes back up. I've checked the documentation and it claims the
alerts will be sent when there is a STATE change, which sounds to me like
it should alert on ANY state change, up or down.
Is anyone else seeing this problem? I ask this list in lieu of having to
join another mailing list to ask about it in case someone here knows how to
fix it.
I presume you mean this:
http://cbonte.github.io/haproxy-dconv/configuration-1.6.html#3.6
I've just looked at the 1.6.5 code and the email alerts are sent on both UP and DOWN under exactly the same circumstances as the syslog UP and DOWN alerts, etc.
I'd be:
- checking syslog for the matching UP and DOWN alerts
- looking at the mail logs on the relevant SMTP server for messages at the right times
- watching the haproxy stats page to check that the server you're expecting alerts for really is UP or DOWN when you expect it to be
- making a test clause in a small standalone haproxy.cfg file and turning servers on and off by hand to watch the behaviour
If nothing is learnt from this, then building and trying 1.6.5 to see if it is different in behaviour from 1.6.3, but I'd be surprised: the code is straight forward and unconditional (see server.c, search for send_email_alert, it shows up right under calls to send_log).
Superficially, I'm suspecting some mail filing issue, but only after looking at the above items first.
Cheers,
Cameron Simpson <cs@xxxxxxxxxx>
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Mark Haney ::: Senior Systems Engineer
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