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1.8. Monitor Instances with JMX

Monitoring with JConsole
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All of the containers in the fabric have JMX enabled by default. To monitor a Fabric Container with JConsole, proceed as follows:
  1. In the local container, use the fabric:container-list console command to obtain the JMX connection URLs for all of the containers, as follows: 
    JBossFuse:karaf@root> fabric:container-list -v
[id]                 [version] [alive] [profiles]                      [ssh url]                     
 [jmx url]                                                                                  [provision status]
mqserver1            1.0       true    mq                              ec2-184-72-214-117.compute-1.amazonaws.com:8101
 service:jmx:rmi://ec2-184-72-214-117.compute-1.amazonaws.com:44444/jndi/rmi://ec2-184-72-214-117.compute-1.amazonaws.com:1099/karaf-mqserver1 success
mqserver2            1.0       true    mq                              ec2-50-19-15-210.compute-1.amazonaws.com:8101
 service:jmx:rmi://ec2-50-19-15-210.compute-1.amazonaws.com:44444/jndi/rmi://ec2-50-19-15-210.compute-1.amazonaws.com:1099/karaf-mqserver2 success
registry             1.0       true    fabric, fabric-ensemble-0000-1  ec2-50-19-18-91.compute-1.amazonaws.com:8101
 service:jmx:rmi://ec2-50-19-18-91.compute-1.amazonaws.com:44444/jndi/rmi://ec2-50-19-18-91.compute-1.amazonaws.com:1099/karaf-registry success
Error executing command: java.lang.RuntimeException: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /fabric/registry/containers/config/root/publichostname
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  2. In an O/S command prompt, enter the following command to start up JConsole: 
    > jconsole
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  3. Copy one of the (rather long) JMX connection URLs from step 1 and paste it into the Remote Console text field of the JConsole: New Connection dialog. In the Username field, type admin; and in the Password field, type admin. Click Connect.
    View larger image
  4. JConsole now establishes a JMX connection to the cloud container. Click on the MBeans tab to explore the status of applications running in the container.

EC2 firewall configuration
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Fabric automatically configures the EC2 firewall to let JMX connections through. It should not be necessary to make any modifications to the firewall configuration.
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