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 Topic: Load balancing / HA with Apache HTTP server and JBoss AS 7 |
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AkshayLokur
Joined: 22 Nov 2013
Posts: 1
Location: India
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 Posted: Fri 22 Nov '13 9:04 Post subject: Load balancing / HA with Apache HTTP server and JBoss AS 7 |
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Hi,
I am tried to integrate Apache HTTP server and JBoss app server 7 with mod_jk module plugin in Apache.
I have two instances of Jboss running and Apache server sends requests to them.
I have added following code in "httpd.conf" of Apache:
| Code: |
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_http_module modules/mod_proxy_http.so
JkWorkersFile "D:/Program Files/Apache Group/Apache2/conf/workers.properties"
JkShmFile "D:/Program Files/Apache Group/Apache2/logs/mod_jk.shm"
JkLogFile "D:/Program Files/Apache Group/Apache2/logs/mod_jk.log"
JkLogLevel info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkMount /MyWebApp/* balance1
ProxyPass / http://localhost:8080/
ProxyPassReverse / http://localhost:8080/
ProxyPass / http://localhost:8082/
ProxyPassReverse / http://localhost:8082/
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And following code in "workers.properties" in Apache:
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# The load balancer worker balance1 will distribute
# load to the members worker1 and worker2
worker.list=balance1, worker1, worker2
worker.balance1.type=lb
worker.balance1.balance_workers=worker1, worker2
# Define 1 real worker using ajp13
#worker.list=worker1, worker2
# Set properties for worker1 (ajp13)
worker.worker1.type=ajp13
worker.worker1.host=localhost
worker.worker1.port=8080
# Define preferred failover node for worker1
worker.worker1.redirect=worker2
# Define 2'nd real worker using ajp13
#worker.list=worker2
# Set properties for worker2 (ajp13)
worker.worker2.type=ajp13
worker.worker2.host=localhost
worker.worker2.port=8082
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But, though I have configured this way, when my worker1 goes down,Apache is not sending requests to worker2 and I get "Service Temporarily Unavailable" message.
Please suggest if I am missing anything in my configuration here?
Thanks,
Akshay |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7355
Location: Germany, Next to Hamburg
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| Posted: Sun 24 Nov '13 20:02 Post subject: |
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IIRC there is ping_mode that could do the trick.
You may also read http://tomcat.apache.org/connectors-doc/generic_howto/loadbalancers.html
I use mod_proxy_ajp for that which has its own advantages and disadvanges over mod_jk. Advantage for me: it is easier to configure 
if you still have a question please ask again. |
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