Vladimír Houba ml. <[email protected]> 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
