Allow Meraki Filter by Network and Org (#410)

Supports a config like:

 meraki_cloud_controller:
    device_name: meraki_cloud_controller
    device_ip: snmp.meraki.com
    ext:
      ext_only: true
      meraki_config:
        api_key: my-meraki-api-key
        monitor_uplinks: false
        monitor_devices: false
        monitor_org_changes: true
        networks:
          - "Network 1"
          - "Network 2"
        organizations:
          - "Org 1"

Author: i3149

pkg/formats/nrm/nrm.go

@@ -205,7 +205,7 @@ func (f *NRMFormat) toNRMetric(in *kt.JCHF) []NRMetric {
 		return f.fromSnmpMetadata(in)
 	case kt.KENTIK_EVENT_KTRANS_METRIC:
 		return f.fromKtranslate(in)
-	case kt.KENTIK_EVENT_SNMP_TRAP:
+	case kt.KENTIK_EVENT_SNMP_TRAP, kt.KENTIK_EVENT_EXT:
 		// This is actually an event, send out as an event to sink directly.
 		err := events.SendEvent(in, f.doGz, f.EventChan)
 		if err != nil {

pkg/inputs/snmp/metrics/poll.go

@@ -321,6 +321,7 @@ func (p *Poller) StartExtensionOnlyLoop(ctx context.Context) {
 	counterAlignment := time.Duration(p.counterTimeSec) * time.Second
 
 	if p.extension != nil {
+		p.log.Infof("Running only extension %s", p.extension.GetName())
 		go p.extension.Run(ctx, counterAlignment)
 	}