Zookeeper + LevelDB + activemq for high availability of Message Queuing

The high availability of Message Queuing is achieved through clustering.

Message Queuing stores important information such as orders, mail notifications, and data distribution in the project, so there is a high demand for stable availability of Message Queuing.

It is now possible to ensure the availability of a ACTIVEMQ node by zookeeper choosing the form of ACTIVEMQ leader.

Zookeeper as the service picker to select Activemq as Master.

The development environment will zoopkeeper ZOO_SAMPLE.CFG copy and modify the file name as Zoo.cfg.

ACTIVEMQ configuration Disable kahadb enable LEVELDB where zkaddress= "127.0.0.1:2181" is configured on top Zoopkeeper

<!--do not use the Kahadb method
<persistenceAdapter>
<KAHADB directory= "${activemq.data}/kahadb"/>
</persistenceAdapter>
-
<persistenceAdapter>
<replicatedleveldb
directory= "${activemq.data}/leveldb"
Replicas= "3"
Bind= "tcp://0.0.0.0:0"
Zkaddress= "127.0.0.1:2181"
Hostname= "127.0.0.1"
Sync= "Local_disk"
Zkpath= "/activemq/leveldb-stores"
/>
</persistenceAdapter>

If the development machine is in the same machine can modify the following port to implement multiple ACTIVEMQ on the same computer to start

<transportConnectors>
<!--DOS protection, limit concurrent connections to $ and frame size to 100MB--
<transportconnector name= "Openwire" uri= "tcp://0.0.0.0:61617?maximumconnections=1000&amp; wireformat.maxframesize=104857600 "/>
<transportconnector name= "AMQP" uri= "amqp://0.0.0.0:5673?maximumconnections=1000&amp; wireformat.maxframesize=104857600 "/>
<transportconnector name= "Stomp" uri= "stomp://0.0.0.0:61614?maximumconnections=1000&amp; wireformat.maxframesize=104857600 "/>
<transportconnector name= "Mqtt" uri= "mqtt://0.0.0.0:1884?maximumconnections=1000&amp; wireformat.maxframesize=104857600 "/>
<transportconnector name= "ws" Uri= "Ws://0.0.0.0:61615?maximumconnections=1000&amp;wireformat.maxframesize =104857600 "/>
</transportConnectors>

Zookeeper + LevelDB + activemq for high availability of Message Queuing