Load Balancer Module for JBOSS

[Alan_Baugher]

Team,

 

Documentation tends to get stale without feedback. 

I am curious about the supporting components that are used for front end of many J2EE solutions.  Particularly, Load Balancing features.

 

 

Question 1: Which load balancing modules are you using for your current solutions to JBOSS from Apache?  Do you plan on upgrading to mod_cluster or other?

 

Three (3) choices:

1)    mod_jk (use pre-built add-on binaries or source;  pre-2005 code; typically downloaded as an add-on package)

2)    mod_proxy (available to be built-into Apache now; requires Apache 2.2.3 or higher)  [Includes mod_proxy_http, mod_proxy_ajp, mod_proxy_balancer, etc.]

a.    :./configure --prefix=$APACHE_HOME --enable-ssl --enable-mods-shared='proxy ssl deflate expires headers'

b.     May use with mod_headers  to create "stickyness" via a header; instead of a cookie.

3)    mod_cluster   (pre-built add-on binaries; requires Apache 2.2.8 or higher; post-2008 code)

a.    Unlike mod_jk, mod_cluster does not require AJP. httpd connections to application server nodes can use HTTP, HTTPS, or AJP.

b.    Jboss has logger for mod_cluster for full monitoring.   org.jboss.modcluster

c.    bi-directional communication:   transmit server-side load balance factors and lifecycle events back to httpd

 

 

References:

http://mod-cluster.jboss.org/

http://tomcat.apache.org/connectors-doc/

http://httpd.apache.org/docs/2.2//mod/mod_proxy.html

 

 

 

Question 2: Have you migrated or move from Jakarta to AAR for MS-IIS to JBOSS?

HTTP Load Balancing using Application Request Routing : The Official Microsoft IIS Site

 

 

 

Cheers,

 

A.

[Scott Owens]

Bill_Patton Valdo

 

Hi Bill and Valdo,

Do you have any information regarding the current LB modules for Jboss and Apache?  Does IDM development have any ETA on when they might be upgrading the mod_cluster or others?

 

Thank you.

 

~Scott Owens

[Alan_Baugher]

Example with mod_jk

Install the Proxy Plug-In for JBoss - CA Identity Manager - 12.6.6 - CA Technologies Documentation

 

 

Example with mod_proxy.

 

Architecture:

httpd.conf  maintained as is with limited changes

- jboss_proxy.conf  [ proxy modules for load balancing to Jboss ]

- ssl_certs.conf  [ SSL functionality pulled into separate configuration file. reference Apache included file httpd-ssl.conf ]

-performance.conf  [ performance tweaks with header, deflate, compress, etc.  ]

 

Within jboss_proxy.conf  [ As test, deployed JBOSS twice on same host with offset ports to avoid collisions with two (2) hostnames]

 

**** configuration file below ****

 

###################################

# JBOSS PROXY REDIRECT & LOAD BALANCE CONFIGURATION

###################################

User smuser

Group smuser

###################################

# Left as reference to items that should exist in httpd.conf

# Defined by  # ./configure --prefix=/opt/CA/httpd --enable-ssl --enable-mods-shared='proxy ssl deflate expires headers' --enable-so

###################################

#LoadModule proxy_module modules/mod_proxy.so

#LoadModule proxy_balancer_module modules/mod_proxy_balancer.so

#LoadModule proxy_http_module modules/mod_proxy_http.so

### Need mod_proxy_connect for SSL

#LoadModule proxy_connect_module modules/mod_proxy_connect.so

 

<Proxy balancer://iam_cluster>

      Order deny,allow

      Allow from all

      BalancerMember http://idm01.domain.dom:8080/iam route=node1

      BalancerMember http://idm02.domain.dom:8180/iam route=node2

    </Proxy>

 

<Proxy balancer://castyles_cluster>

      Order deny,allow

      Allow from all

      BalancerMember http://idm01.domain.dom:8080/castylesr5.1.1 route=node1

      BalancerMember http://idm02.domain.dom:8180/castylesr5.1.1 route=node2

    </Proxy>

 

# Define the "URI" that will redirect to the correct "cluster"

ProxyPass /iam balancer://iam_cluster lbmethod=byrequests stickysession=JSESSIONID|jsessionid

ProxyPassReverse /iam  balancer://iam_cluster

 

ProxyPass /castylesr5.1.1 balancer://castyles_cluster lbmethod=byrequests stickysession=JSESSIONID|jsessionid

ProxyPassReverse /castylesr5.1.1 balancer://castyles_cluster

 

# Enable Monitor Tool - Built into mod_proxy_balancer - Use ONLY on Admin Location - Disabled for Production Env.

<Location /balancer-manager>

        SetHandler balancer-manager

        Order deny,allow

        Allow from all

</Location>

ProxyPass /balancer-manager !

ProxyPass / balancer://iam_cluster/ stickysession=JSESSIONID|jsessionid nofailover=Off scolonpathdelim=On

 

###################################

# Set debug level for logs to validate processes

# Disable after initial deployment is successful

LogLevel debug

###################################