Problem: Once ipvdadm rule is in place allowing Virtual server real node to handle requests (in this case WWW requests), you become unable
to test if the rule works since you can not run the following command from the LVS active node.
while true; do lynx -head http://virtualserver_ip; done
as stated in the documentation.
Workaround: One must telnet/shh to some outside server and run the above command from there.
This escalates the problem to a SEVERE setting if one does not have an outside system from which to run this test. According to the docs this
command should work FROM the active node and should not require an outside node
This works for us. We do it on a regular basis both in the lab and as part of QA
product testing. In all cases, this is done from a client PC, as the request
needs to originate from there to be a valid representation test of a client
request being processed. I'll take a look at applying it to the LVS router and
see if the documentation needs to be corrected on this. If the documentation is
modified as a result, an update will get posted here on bugzilla.