Dell iDRAC Telemetry Reference Guide

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Creating subscriptions

To create a subscription, the client sends an HTTP POST request to the iDRAC Event Service. The request includes the following parameters:

Table 1. HTTP POST request parametersParameters and their description
Parameters	Decsription
Destination	The IP address and port number where the client will receive the Telemetry reports.
EventFormatType	The type of event format, which is set to "MetricReport" for Telemetry reports.
Context	A name for the subscription.
Protocol	The protocol used to receive the reports, which is set to "Redfish".
EventTypes	The types of events to receive, which is set to ["MetricReport"] for Telemetry reports.
SubscriptionType	The type of subscription, which is set to "RedfishEvent".
MetricReportDefinitions	An array of metric report definitions to receive, if list not specified all enabled reports will be received.

The following example create a new subscription with subscription id. To get the subscription id, see Viewing Current Subscriptions where you can view all the subscriptions.

Command: POST
URI: https://<IDRAC_IP>/redfish/v1/EventService/Subscriptions 
Body: { 
"Destination": "https://<listener ip:port>”, 
"EventFormatType": "MetricReport", 
"Context": "TelmetryTest", 
"Protocol": "redfish", 
"EventTypes": ["MetricReport"],
"SubscriptionType":"redfishEvent" 
}
Header: content-type application/json

For example: 
curl -s -k -u <user>:<password> -X POST “https://<IDRAC_IP>/redfish/v1/EventService/Subscriptions -H 'Content-Type: application/json' -d
'{
"Destination": "https://<listener ip:port>",
 "EventFormatType": "MetricReport",
 "Context": "TelmetryTest",
 "Protocol": "redfish",
 "EventTypes": ["MetricReport"],
 "SubscriptionType":"redfishEvent", 
  "MetricReportDefinitions":[{ "@odata.id":"/redfish/v1/TelemetryService/MetricReportDefinitions/", 
 "@odata.id":  "/redfish/v1/TelemetryService/MetricReportDefinitions/"}]}'”

The details of each parameter can be found here Parameter details.