Cassandra is a scalable and fault-tolerant NoSQL database system. For more information visit http://cassandra.apache.org/.
Even if the Cassandra plugin is not configured, Cloud Monitoring discovers Cassandra services running in your Cloud Platform project by:
- Searching instance names for cassandra
- Checking for ports opened to 9160 via firewall rules
The services discovered are displayed on the Cassandra Services page in the Resources menu. After you install the Monitoring agent and configure the Cassandra plugin on your instances, Monitoring populates the Cassandra Services page with inventory and metrics.
Configuring Monitoring to monitor Cassandra
After you install the Monitoring agent, use the following instructions to configure the Cassandra plugin on your instances.
The Cassandra plugin requires version 5.5.0-257 or later of the Monitoring agent. To update the agent, go to Upgrading the agent.
Enabling the Cassandra monitoring plugin
Cassandra is monitored via JMX. Monitoring has separate configurations for monitoring Cassandra versions 2.1.x and below, and versions 2.2.x and above.
On your VM instance, download the appropriate configuration file from the
GitHub configuration repository
based on your Cassandra version
and place it in the directory
(cd /etc/stackdriver/collectd.d/ && sudo curl -O https://raw.githubusercontent.com/Stackdriver/stackdriver-agent-service-configs/master/etc/collectd.d/cassandra-22.conf)
(cd /etc/stackdriver/collectd.d/ && sudo curl -O https://raw.githubusercontent.com/Stackdriver/stackdriver-agent-service-configs/master/etc/collectd.d/cassandra.conf)
The downloaded plugin configuration file assumes that your Cassandra instance is configured to accept JMX connections on port 7199. If you have configured Cassandra with a different JMX port, as root, edit the file and follow the instructions to change the JMX port settings.
After adding the configuration file, restart the monitoring agent by running the following command:
sudo service stackdriver-agent restart
For more information on the
GenericJMX plugin used to monitor
Cassandra, see Plugin:GenericJMX.