Backend servers sending 503 status in the worker's header can be used in the
balancer to mark it as Err.
The config is like this w/ failonstatus=503
Header add Set-Cookie "BALANCEID=backend.%{BALANCER_WORKER_ROUTE}e; path=/;"
env=BALANCER_ROUTE_CHANGED
ProxyRequests Off
ProxyPreserveHost On
<Proxy balancer://mycluser/>
BalancerMember http://venus.saa.com/ route=venus
BalancerMember http://saturn.saa.com/ route=saturn
</Proxy>
ProxyPass /balancer-manager !
ProxyPass / balancer://mycluser/ stickysession=BALANCEID nofailover=Off
failonstatus=503
ProxyPassReverse / balancer://mycluser/
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