gRPC Dial-Out support on JTI

Junos OS provides gRPC Dial-Out support for telemetry. In contrast to the gNMI Dial-In feature, where the collector (client) initiates a connection to the target device (server) to perform a gNMI subscription operation for telemetry data, the gRPC Dial-Out feature initiates the request for telemetry data in a reverse fashion. The target device initiates a gRPC session with the client, and when the session is established, streams the telemetry data that is specified by the sensor-group subscription to the collector. 

gRPC Dial-Out provides several benefits as compared to gRPC Dial-In:

• Reduces the exposure of target devices to threats outside of their topology.
• Simplifies access to a target device, which, if the gRPC Dial-In method is used, would require a collector to overcome a series of complex firewall configurations to gain access to the target device.
• Collectors can be stateless; without the need to initiate a session, they simply listen, subscribe, and store collected data.
• Supports encryption statistics to an outside collector.

To enable export of statistics, include the export-profile and sensor option at the [edit services analytics] hierarchy level. The export profile should include the reporting rate, the transport service (like gRPC), and the format (like gbp-gnmi). The sensor configuration should include the name of the collector (the server?s name), the name of the export profile, and the resource path (sensor name), such as /interfaces/interface