Olivier.GIORGI at 3ds
Apr 26, 2012, 2:50 AM
Post #1 of 1
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Load balancing & session affinity (QUERY)
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Hello to all,
I am using Apache 2.2.21 & Tomcat 6.0.29
1) Schema: Load balancer (Apache.2.2.21) -> 1st appli (Tomcat 6.0.29)
-> 2nd appli. (Tomcat 6.0.29)
2) Using the following configuration, my load balancing is stateless instead of statefull (having a look at the logs).
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ProxyRequests Off
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
<IfModule log_config_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{UNIQUE_ID}e\" \"%{BALANCER_WORKER_ROUTE}e\"" logjyc
CustomLog logs/jyc_log logjyc
</IfModule>
ProxyPass /MCSRootURI balancer://MCSCluster stickysession=JSESSIONID nofailover=Off
<Proxy balancer://MCSCluster >
BalancerMember http://workstation1:MCSPort1/MCSRootURI route=host1
BalancerMember http://MCSServer2:MCSPort2/MCSRootURI route=host2
</Proxy>
ProxyPassReverse /MCSRootURI http://MCSServer1:MCSPort1/MCSRootURI
ProxyPassReverse /MCSRootURI http://MCSServer2:MCSPort2/MCSRootURI
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3) Query
=> What have i missed on Apache or Tomcat side to get JSESSIONID taken into account then have a statefull load balancing ?
4) Bypass: using the following configuration my load balancing is this time statefull (having a look at the logs).
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ProxyRequests Off
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
<IfModule log_config_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{UNIQUE_ID}e\" \"%{BALANCER_WORKER_ROUTE}e\"" logjyc
CustomLog logs/jyc_log logjyc
</IfModule>
SetEnvIf ^Cookie$ "MYCOOKIE=([^ ;]*)" VARCOOKIE=$1
Header add Set-Cookie "MYCOOKIE=%{UNIQUE_ID}e.%{BALANCER_WORKER_ROUTE}e; path=/" env=!VARCOOKIE
ProxyPass /MCSRootURI balancer://MCSCluster stickysession=MYCOOKIE nofailover=Off
<Proxy balancer://MCSCluster >
BalancerMember http://MCSServer1:MCSPort1/MCSRootURI route=host1
BalancerMember http://MCSServer2:MCSPort2/MCSRootURI route=host2
</Proxy>
ProxyPassReverse /MCSRootURI http://MCSServer1:MCSPort1/MCSRootURI
ProxyPassReverse /MCSRootURI http://MCSServer2:MCSPort2/MCSRootURI
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Thanks in advance for your help.
Best regards Olivier.
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