Data sources specify which data points the system collects and how to collect them. Each monitoring template comprises one or more data sources. The system provides the following built-in data source types. ZenPacks provide other data source types.
- SNMP - Define data to be collected via SNMP by the ZenPerfSNMP daemon. You specify which SNMP OID to collect. (Many OIDs must end in .0.) Because SNMP data sources specify only one performance metric, they contain a single data point.
Command - Specify data to be collected by a shell command that is executed on the Zenoss Core server or on a monitored device. The ZenCommand daemon processes COMMAND
data sources. A COMMAND data source can return one or more performance metrics, and usually has one
data point for each metric.
Shell commands that are used with COMMAND data sources must return data that conforms to the Nagios plug-in output specification. For more information, see Monitoring using ZenCommand.