Miguel Gonzalez wrote:
Dear all,
We currently have an IIS 6 fronting several Tomcat 6 containers with a list of workers for each redirection we want to forward from IIS to each tomcat.
We are thinking of migrating to IIS 7.5 and Tomcat 7. Also we would like that
two of the nodes share the same redirection and so we can balance the load to
two servers instead of having one server. Is it possible that two of the
nodes are balanced in a group while the other nodes are stand-alone?
As far as I know, at the front-end level you can set "workers" to be either real
individual Tomcat nodes, and/or one or more "load balancing worker" each of which has its
own set of real Tomcat workers.
Does that not cover the need that you express ?
Say you have 6 real Tomcats, named T1..T6.
You want to pass some requests directly to T1 and T2.
For the rest, you make 2 groups of 2 load-balanced Tomcats :
group1: T3 & T4
group2 : T5 & T6
For each of the above "groups", you define one "load-balancing worker".
Very roughly, in workers.properties (please check the original on-line documentation for
precise syntax and properties) :
worker.list=T1,T2,LB1,LB2
(you name here only the workers to which you are going to pass requests directly. You do
not name T3..T6, because you will not send requests to them directly. Instead, you will
send requests for them through LB1 and LB2).
# define all "real" workers T1-T6 :
worker.T1.type=AJP13
worker.T1.host=T1.mydomain.com
....
worker.T6.type=AJP13
worker.T6.host=T6.mydomain.com
# (note: using a "template" for the above will save typing)
# define the 2 load-balancing workers :
worker.LB1.type=lb (for "load-balancer")
worker.LB1.balance_workers=T3,T4
...
worker.LB2.type=lb (for "load-balancer")
worker.LB2.balance_workers=T5,T6
...
Now, for the requests that you want to forward specifically to T1 or T2, you
use :
JkMount /someurl T1
JkMount /someotherurl T2
For the requests which you want to pass to T3 or T4 with load-balancing, you
use :
JkMount /someadditionalurl LB1
For the requests which you want to pass to T5 or T6 with load-balancing, you
use :
JkMount /somemoreurl LB2
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
