Telemetry - YANG Model Parser

Deepak Ladha — Fri, 23 Apr 2021 06:59:31 GMT

Hi All,

I'm exploring streaming telemetry on Cisco devices to receive operational state information. As appears, a telemetry message does not include a unit (byte, kb, etc) for the streamed value -

      {
        "name": "used-memory",
        "uint64Value": "353673736"
      }

To interpret the streamed value, we need to look into the YANG model (Cisco-IOS-XE-memory-oper.yang) to get unit information -

    leaf used-memory {
      type uint64;
      units "bytes";
      description
        "Total used memory in the pool (bytes)";
    }

So, I am looking for a YANG parser (in Java) that can help in reading a YANG model so that relevant information e.g. unit, description etc. can be retrieved for a Leaf statement. I explored OpenDayLight Java parser but could not find a way to read Leaf statements. (Python has pyang module that converts YANG model to YIN (kind of XML) but I need something in Java.)

So, my requirement is that given the encoding path from Telemetry message -

"encodingPath": "Cisco-IOS-XE-memory-oper:memory-statistics/memory-statistic"

Can I retrieve all the contained Leaf statements for the path? For the above encoding path, few of the Leaf statements are -

    leaf name {
      type string;
      description
        "The name of the memory pool";
    }
    leaf total-memory {
      type uint64;
      units "bytes";
      description
        "Total memory in the pool (bytes)";
    }
    leaf used-memory {
      type uint64;
      units "bytes";
      description
        "Total used memory in the pool (bytes)";
    }

Please let me know if you have any pointer in this regard. Thanks.

-Deepak

Re: Telemetry - YANG Model Parser

Alexander Stevenson — Wed, 28 Apr 2021 13:29:42 GMT

Hello Deepak,

Please have a look at our YANG Tools Knowledge Base.

Hope this helps!

topic Re: Telemetry - YANG Model Parser in Tools

Telemetry - YANG Model Parser

Re: Telemetry - YANG Model Parser