I have used Apache HTTPD mod_jk and Tomcat for a high availability solution. Here is the workers.properties for it.
worker.list=myworker
worker.myworker1.port=8009
worker.myworker1.host=host1
worker.myworker1.type=ajp13
worker.myworker1.lbfactor=1
worker.myworker2.port=8009
worker.myworker2.host=host2
worker.myworker2.type=ajp13
worker.myworker2.lbfactor=1
worker.myworker.type=lb
worker.myworker.balance_workers=myworker1,myworker2
worker.myworker.sticky_session=True
Right now, the requests are equally distributed among the workers and applications are working fine. What I want is, all the requests must go to myworker1. Only if myworker1 is down, it should be redirected to myworker2.
Is there a way possible with mod_jk for this?
- Redirect to myworker2 in case myworker1 fails
- Disable myworker2 for all the requests except for failover
These two lines must be added to your file
worker.myworker1.redirect=myworker2
worker.myworker2.activation=disabled
See: https://salonegupta.wordpress.com/2014/08/27/apache-load-balancer-setup-with-failover-mechanism/ for more information
来源：https://stackoverflow.com/questions/31017740/http-load-balancing-rdirect-only-if-first-worker-fails-using-mod-jk