In this model you need to get downloaded following apache product
Version 3.3.4
Deployment model will be like bellow
In this model we have a common zoo keeper server. Since we are shipping a cassandra server with Message broker product we can use that and create a cassandra ring in the cluster.
We have three Message Broker servers in three different hosts as and all of them are having a cassandra server in it
We need to configure cassandra servers in these MB servers to form a cassandra ring. For that we need to change the following entries in the "Cassandra.yaml" file which is located in the "wso2mb-2.0.1/repository/conf/etc" directory.
# seeds is actually a comma-delimited list of addresses. # Ex: "<ip1>,<ip2>,<ip3>" - seeds: "192.168.0.101,192.168.0.102"
listen_address: 192.168.0.102
rpc_address: 192.168.0.103
Then we need to configure the Zoo Keeper Server to listen to all broker nodes. We can do it by renaming the "zoo_sample.cfg" file which can be found at "zookeeper-3.3.4/conf" folder to "zoo.cfg" and do the following modification in that file
After modifying the file , it will look like bellow.
# The number of milliseconds of each tick tickTime=2000 # The number of ticks that the initial # synchronization phase can take initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # the directory where the snapshot is stored. dataDir=./../data # the port at which the clients will connect clientPort=2181 clientPortAddress=192.168.0.100
Once you done the above changes, you can save the file and start the zookeeper server by executing the "zkServer.sh" script with the option start. eg: sh zkServer.sh start
Then you need to do the following configuration changes in each Message broker nodes
Modify qpid-config.xml file which is located at : /repository/conf/advanced directory as bellow
<clustering> <enabled>true</enabled> <OnceInOrderSupportEnabled>false</OnceInOrderSupportEnabled> <externalCassandraServerRequired>false</externalCassandraServerRequired> <coordination> <!-- Apache Zookeeper Address --> <ZooKeeperConnection>192.168.0.100:2181</ZooKeeperConnection> <!-- Format yyyy-MM-dd HH:mm:ss --> <ReferenceTime>2012-02-29 08:08:08</ReferenceTime> </coordination>
Now you can start all three Message Broker nodes.
The WSO2 Oxygen Tank Library : The Library contains articles, tutorials, presentations, and other knowledge base items published on The Oxygen Tank on different styles of deployments.