LogicMonitor monitors Cassandra clusters using JMX. The following Datasources are available:
- Cassandra JVM Garbage Collection –
- Cassandra JVM Heap and Threads and Uptime –
- Cassandra JVM Memory Pools –
- Cassandra Keyspace Cache –
- CassandraColumnFamilyStore –
- CassandraConcurrent –
To use these in LogicMonitor, check your cassandra-env.sh file on the Cassandra server to see what you have configured for RMI authentication, including user, password and JMX port. Then add your Cassandra server as a monitored device.
Once added, locate this server on the Device tree and configure its properties as follows:
- Set the system.categories property to cassandra
- Set the following three properties to reflect what you have configured in the cassandra-env.sh file:
- cassandra.jmx.port =
- jmx.user =
- jmx.pass =
- Note: Two of the datasources (CassandraColumnFamilyStore and CassandraConcurrent) use jmx.port for #1 above. If you use these, either edit the ‘URL’ field in those datasources to specify ‘cassandra.jmx.port’ to make them consistent, or set the jmx.port property instead.
The nodetool utility is a command-line interface to access the data exposed by Cassandra via JMX. You can use this to verify that you can access performance data as follows:
nodetool -h host -p port -u user -pw password command
See Apache Nodetool documentation for more details.