Thank you Marc for fast reply, yes we have monitoring deployed in place and are aware of this possibility.
Though we thought implementation in haproxy would have several benefits - easy configuration (no need to integrate scripts with nagios on every node) - as we use permanent connection the periodic nature of monitoring checks can miss (and probably will as the connections are immediately re-established if possible) a connection break-up Haproxy already is great!! at moniroting and health-checking backends, and extending mailers would give a new range of interesting possibilities. This was intended more as a feature idea, just to draw our use-case in case others would share it. Thank you again, Vladimir On Fri, Jan 19, 2018 at 12:07 PM, Marc Fournier < marc.fourn...@camptocamp.com> wrote: > Vladimír Houba ml. <vlad...@prosoft.sk> writes: > > Hello, > > > we have many backends with few permanent connections/each and I was > > wondering if it is possible to send an email alert when no connection is > > active on the backend. It is not possible to implement this feature on > the > > application server as they are load-balanced and the connection may be > > routed to any of them. > > > > Also, it would be nice feature to be able to send the notifications via a > > rest service to make it more flexible. > > This sounds like the sort of thing a monitoring system does. Fortunately > HAProxy already offers a nice hook for this class of tools: > http://cbonte.github.io/haproxy-dconv/1.8/management.html#9 > > Basically, fetch the stats, parse the CSV format and extract the > per-server/backend "current sessions" field, trigger an alert if the > value is below a certain threshold. > > HTH, > Marc > > -- S pozdravom / Best regards Vladimír Houba jr. Prosoft <http://www.prosoft.sk>, Slovakia +421 915 708 171
