Adding an instance
Most devices will have multiple occurrences of some objects - such as physical disks, or interfaces, or volumes. In LogicMonitor, these are referred to as multiple instances. There are two ways to add instances to be monitored:
- Active Discovery - Active Discovery is automatically run for multi-instance datasources that have it enabled. How often Active Discovery is run is dictated by the datasource definition. There are situations where you don't want to wait until the next time Active Discovery is scheduled for LogicMonitor to add the instance to monitoring. In these cases, you can manually run Active Discovery on a device to trigger new instances to be automatically added.
- Manually adding the instance - Datasources that do not have Active Discovery enabled require instances to be added manually. An example of a multi-instance datasource where it may be appropriate not to enable Active Discovery would be for an application that runs on a different port on every device, and the list of ports is not exclusive to this application. In this case, it is probably easiest to just manually add an instance of the application, specifying the port.
Note that by default, LogicMonitor will only show datasources that have one or more active instances for a device. If there are no existing instances for the device (either because no instances were discovered by Active Discovery or Active Discovery is disabled and instances have not yet been added manually), the datasource will not be displayed.
Manually Run Active Discovery
Before you manually run Active Discovery, make sure that the datasource and/or instance are not disabled at the group level - this will prevent instances from being added to monitoring.
Manually Add a Monitored Instance
You can manually add instances from the Instances tab of a multi-instance datasource OR by selecting 'Add Monitored Instance' from the Manage Dropdown next to the manage button for the device you wish to add an instance to:
Select the datasource to add an instance for. Only manually discovered datasources are available.
The instance name that will display in the Device Tree and referenced throughout the application. Note that the instance name is limited to 255 characters.
The value to be used for this instance in datasource and datapoint analysis. This property will be used by the datasource to query this specific instance. (Such as a specific port, or snmp oid index.) Note that the wildcard value is limited to 1024 characters.
Instance descriptions display in the Device Tree and for Alert Tuning.
Assign an instance group to simplify instance management. If @default is assigned, the instance will appear directly under the datasource.