Actually we are load balancing tomcat too.
Thank you,
Best Regards,
Kashif Rahman
Principal SCM Engineer
Description: vopium_signature_logo
Vopium A/S | Office# 2, 7th Floor, Shaheen Complex | 38 Abbot Road
Lahore | Pakistan | t + 92 42 6316491 | f + 92 42 6316492
Description: imagesCAV9FMB1 + 92 334 9771227 | Description: imagesCAXWPPLS
kashif_r | w www.vopium.com <
http://www.vopium.com/>
From: Anam Ali Khan [mailto:anamalikhan@yahoo.com]
Sent: Thursday, March 15, 2012 10:16 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] Apache + Tomcat Load Balancing
Why are you defining mod_proxy_balancer directives in WEB1 & WEB2. You only
need to configure these in Apache Load Balancer machine.
Correct me if i am wrong.
-Anam
_____
From: Anam Ali Khan <anamalikhan@yahoo.com>
To: "users@httpd.apache.org" <users@httpd.apache.org>
Sent: Thursday, 15 March 2012, 22:13
Subject: Re: [users@httpd] Apache + Tomcat Load Balancing
Do not use session replication/sharing, use session stickiness instead.
-Anam
_____
From: Igor Cicimov <icicimov@gmail.com>
To: users@httpd.apache.org
Sent: Wednesday, 14 March 2012, 14:48
Subject: RE: [users@httpd] Apache + Tomcat Load Balancing
What is in apache log file, any proxy errors? I would do some extra logging
if i was you as given in the below link:
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html#stickyness_trou bleshooting
On Mar 14, 2012 8:28 PM, "Kashif Rahman" <kashif.rahman@vopium.com> wrote:
Yes I have that same in server.xml on both tomcats.
Thank you,
Best Regards,
Kashif Rahman
From: Igor Cicimov [mailto:icicimov@gmail.com]
Sent: Wednesday, March 14, 2012 2:21 PM
To: users@httpd.apache.org
Subject: RE: [users@httpd] Apache + Tomcat Load Balancing
Does the route parameters in the apache balancer tomcat1 and tomcat2 match
the jvmRoute value in the tomcat connectors?
On Mar 12, 2012 9:19 PM, "Kashif Rahman" <kashif.rahman@vopium.com> wrote:
Here what I have used :
==================
ProxyRequests Off
<Proxy *>
AddDefaultCharset Off
Order deny,allow
Allow from all
</Proxy>
ProxyPass /balancer-manager !
ProxyPass /examples balancer://qawebcluster/examples
ProxyPassReverse /examples balancer://qawebcluster/examples
ProxyPass /kashif/admin ajp://x.x.x.x:18009/kashif/admin
ProxyPassReverse /kashif/admin ajp://x.x.x.x:18009/kashif/admin
#ProxyPass /kashif balancer://qawebcluster/kashif
stickysession=JSESSIONID|jsessionid
#ProxyPassReverse /kashif balancer://qawebcluster/kashif
stickysession=JSESSIONID|jsessionid
ProxyPass /kashif balancer://qawebcluster/kashif
ProxyPassReverse /kashif balancer://qawebcluster/kashif
ProxyPass /k balancer://qawebcluster/k
stickysession=JSESSIONID|jsessionid
ProxyPassReverse /k balancer://qawebcluster/k
stickysession=JSESSIONID|jsessionid
<Proxy balancer://qawebcluster>
BalancerMember ajp://127.0.0.1:8009 route=tomcat1 disablereuse=On
BalancerMember ajp://x.x.x.x:8009 route=tomcat2 disablereuse=On
ProxySet lbmethod=byrequests
</Proxy>
ProxyPreserveHost Off
ProxyStatus On
==================
We have this config on WEB1 as WEB2 both. 3 machines involved. 1 Apache
only for load balancing and 2 machines as WEB1 and WEB2 having Apache and
tomcat on each.
We are using mod_proxy_ajp
Tomcat is clustered. Session replication works, if single Apache is handling
2 tomcat instances. When we start second Apache, tomcat session replication
stops. We want to have failover for PHP side too.
Thank you,
Regards,
Kashif Rahman.
From: Igor Cicimov [mailto:icicimov@gmail.com]
Sent: Monday, March 12, 2012 2:12 PM
To: users@httpd.apache.org
Subject: RE: [users@httpd] Apache + Tomcat Load Balancing
You can at least tell us what OS are these servers running on? Also you said
when you put second apache something is not working so we would like to see
your apache config if you dont mind. Another thing not clear to me is tomcat
session replication. Are the tomcats clustered? If not how do they replicate
the sessions between each other?
In meantime check mod_proxy_balancer documentation as possible solution. You
can find lots of examples with sticky sessions configuration fot this module
for tomcat backends.
On Mar 12, 2012 6:19 PM, "Kashif Rahman" <kashif.rahman@vopium.com> wrote:
Thanks Anam, but we are looking at to use mod proxy for Apache/Tomcat
Communication and session persistence. Can it be done using our requirement?
Thank you,
Regards,
Kashif Rahman.
From: Anam Ali Khan [mailto:anamalikhan@yahoo.com]
Sent: Friday, March 09, 2012 7:44 PM
To: users@httpd.apache.org
Cc: Kashif Rahman
Subject: Re: [users@httpd] Apache + Tomcat Load Balancing
Hi,
I would recommend HAProxy as a load balancer in your PHP + JSP application
environment. It will work as follows:
1. First HAProxy will accept client request.
2. It will forward those requests to two machines via round robin
3. Each WebServer must use mod_jk as a connector (module) for Apache/Tomcat
communication and session persistence.
4. HAproxy also perform health checking for two servers.
-Anam
_____
From: Kashif Rahman <kashif.rahman@vopium.com>
To: users@httpd.apache.org
Sent: Friday, 9 March 2012, 11:36
Subject: [users@httpd] Apache + Tomcat Load Balancing
Hi,
We have requirement for to load balance our PHP + JSP application. I need to
know that how can I load balance 2 Apache web Servers and 2 Tomcat Servers,
1st Web Server + Tomcat on 1st machine and 2nd Web Server + Tomcat on 2nd
machine. We want to use Proxy Load Balancer for Apache to tomcat
communication.
If we use single Apache Web Server and 2 tomcat instances on different
machines, it seems to be working and sharing session fine, but when we add
2nd apache web server to have fail over for PHP too, tomcat stops
replicating session? If anyone is running such type of setup then kindly do
let me know what could be the issues or anything missing. I am using Apache
WebServer as a load balancer for both Apache too.
Apache Webserver
|
|
_____ |______
| |
Apache Webserver Apache Webserver
| |
Tomcat Tomcat
What could be the recommended solution for this requirement?
Thank you,
Best Regards,
Kashif Rahman
image001.png (6.74 KB)