LOAD BALANCING WITH APACHE WEB SERVER (PART 3)

Create and run another web service on Server 2 (in this case it on 10.0.1.86)

1. Repeat the same steps similar to the ones done on Server 1
2. Finally the exposed web service should have a URI, http://10.0.1.86:8091/hello?wsdl

Now that we have 2 services running on 2 different servers, configuration of LB for these servers can be done.

Install and configure HTTPD Server as LB instance

1. Download and install apache httpd server. (If already exists, then skip to next step). This can be downloaded fromhttp://httpd.apache.org/download.cgi 
2. Configure httpd-proxy-balance.conf
  a. Required to keep this file under ‘conf/extra/’ folder
  b. httpd-proxy-balance.conf should look like

<IfModule mod_proxy_balancer.c>
ServerName www.mycompany.com
ProxyRequests off
<Location /balancer-manager>
Set Handler balancer-manager
Order deny,allow
Allow from all
</Location>
ProxyPass /balancer-manager !
ProxyPass / balancer://mycluster/ stickysession=SESSION_ID
<Proxy balancer://mycluster >
BalancerMember http://10.0.1.86:8091 loadfactor=4 route=node1
BalancerMember http://10.0.1.43:8091 loadfactor=6 route=node2
# Load Balancer Settings
# We will be configuring a simple Round
# Robin style load balancer. This means
# that all webheads take an equal share of
# of the load.
ProxySet lbmethod=byrequest
</Proxy>
</IfModule>

3. Configure httpd.conf
a. Make sure they are uncommented following modules

LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
LoadModule proxy_module modules/mod_proxy.so

b. Add this line

Include conf/extra/httpd-proxy-balancer.conf

c. Save and restart, httpd

ASSERT LB ACTIVITY

1. Point at the browser, and access http://<>:8090/ In this case it is http://10.0.1.86:8090/hello?wsdl
2. This will take us to the exposed web service on a round robin basis and shares equal load between 10.0.1.43 and 10.0.1.86