Hi, 2017-01-25 22:05 GMT+01:00 Vamsee Lakamsani <vam...@yahoo.com.invalid>:
> > Hi, > > We are using mod_proxy_balancer (mod_lbmethod_byrequests) with Apache > httpd 2.4 on Amazon Linux 4.4.41-35.53.amzn1.x86_64 (2016.09). > We are using the docs from here: > > mod_proxy_balancer - Apache HTTP Server Version 2.4 > <https://httpd.apache.org/docs/2.4/mod/mod_proxy_balancer.html> > > mod_proxy_balancer - Apache HTTP Server Version 2.4 > <https://httpd.apache.org/docs/2.4/mod/mod_proxy_balancer.html> > > Here is our balancer setup: > > ProxyHCExpr ok234 {%{REQUEST_STATUS} =~ /^[234]/} > Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" > env=BALANCER_ROUTE_CHANGED > <Proxy "balancer://mainBalancer"> > BalancerMember "http://api1:3000"; route=1 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api2:3000"; route=2 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api3:3000"; route=3 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api4:3000"; route=4 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api5:3000"; route=5 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api6:3000"; route=6 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api7:3000"; route=7 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api8:3000"; route=8 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api9:3000"; route=9 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > BalancerMember "http://api10:3000"; route=10 loadfactor=1 hcmethod=GET > hcuri=/onkore/api/v1/time hcexpr=ok234 hcinterval=10 hcpasses=2 hcfails=3 > ProxySet lbmethod=byrequests stickysession=ROUTEID nofailover=Off > </Proxy> > > We are seeing (as measure by New Relic our monitoring service) that http > request are not being distributed equally. The first server (api1) is getting > more than the second one and so on with the last one getting the least amount > of request. Attached is a screen shot that shows this. > > Quick sanity check: have you verified from the httpd access logs that the monitoring service is reporting correct metrics? > We would appreciate any feedback on what is causing this and how to fix. A > related question is on the health checks. Is there any way to avoid > copy/pasting the health check info on all the member lines? > > https://httpd.apache.org/docs/2.4/mod/mod_proxy_balancer.html#stickyness I would check what is the effect of the configured sticky session to the load balancer behavior (for example do some tests without it if possible). Hope that helps! Luca
