Contents
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Overview
Prepare Environment
* Decide on cluster architecture (basic vs multi tier, proxy or not)
* Network and security
* Firewalls
– don’t cluster over firewalls
* Choose machines
* IP addresses and DNS names, port numbers
* Configure node manager
Tools to Configure Cluster
* Configuration wizard
* Admin console
* JMX: weblogic.management.configuration.ClusterMBean
* weblogic.Server API
* WLST
connect('myuser','mypass','myhost:7001')
edit()
startEdit()
cd('/')
cmo.createCluster('HRWebCluster')
cd('/Clusters/HRWebCluster')
cluster = getMBean('/Clusters/HRWebCluster')
cd('/Servers/serverA')
cmo.setCluster(cluster)
cd('/Servers/serverB')
cmo.setCluster(cluster)
cd('/Servers/serverC')
cmo.setCluster(cluster)
activate()
disconnect()
exit()Create and configure a cluster via the admin console
Create a Cluster via Admin Console
Config a Cluster via Admin Console
Add servers to a cluster via the admin console
Start Cluster
* Start individual managed server instances
* For example:
– Start MyMSvr1:
./startManagedServer MyMSvr1– Start MyMSvr2 (from another command window):
./startManagedServer MyMSvr2
Configure OHS as the cluster proxy server
* Relies on mod_wl_ohs
* Uses WebLogicCluster directive to configure a cluster
LoadModule weblogic_module "${ORACLE_HOME}/ohs/modules/mod_wl_ohs.so" <IfModule mod_weblogic.c> WebLogicCluster w1s1.com:7021,w1s2.com:7021,w1s3.com:7021 ErrorPage http://myerrorpage.mydomain.com MatchExpression *.jsp </IfModule> <Location /medrec> SetHandler weblogic-handler </Location>
Start and Stop OHS Manually
# Check status ./opmnctl status -l # Start ./opmnctl stopproc process-type=OHS # Stop ./opmnctl startproc process-type=OHS # Restart ./opmnctl restartproc process-type=OHS
Explain how proxy plug-ins perform load balancing and failover
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