I have an LVS-DR service managed by ldirectord with 6 Windows
realservers running IIS. I have been using "checktype=negotiate" setup
whereby the "request" is a script that logs in to the application on the
Of course, when a realserver is down, the "request" doesn't get a valid
"receive" string, so ldirectord rightly takes the relevant realserver
out of the IPVS table.
The application running on the realservers is very resource-intensive,
and has a built-in "Server too busy -- come back later" mechanism that
kicks in when a realserver determines that is it too overloaded to allow
any new connections. However, the application can continue to service
The application owners have asked if there is anything we can do to
quiesce realservers that are in the "Too busy" state (i.e. continue to
service existing connections but redirect new connections to other
I see that there is 'feedbackd', which looks pretty much what I want,
but it looks pretty linux-centric.
What are other people doing about this sort of thing?