Adding new Sonic Yang

[Shakti]

Hi All,

I'm trying to add a new dummy Sonic yang model(for understanding purposes).

As I understand from the documentation, the following needs to be done:

- Define the Sonic yang model, as per the Sonic guidlines 

- Add corresponding test entry in sample_config_db.json (this test passes)

The conversion from yang to DB and vice-versa will be handled by common app.

(As done for sonic-port.yang)

Post these steps, I get the REST interface and yaml generated. 

But when I try to PUT/POST, although there is no error, the CONFIG DB doesn't gets updated.

YANG:

---------------

module sonic-myapp {

  namespace "http://github.com/Azure/sonic-myapp";

  prefix myapp;

  yang-version 1.1;

  organization "Dummy Org";

  contact "du...@dummy.com";

  description "Dummy Sonic YANG model";

  revision 2021-10-25 {

    description

      "Initial revision";

  }

  container sonic-myapp {

          description

                  "Dummy container";

          container MYAPP_TABLE {

                container myapp_first {

                  leaf myapp_leaf {

                          type string;

                          default "dummy";

                  }

                }

          }

  }

}

Probable Issue:

--------------------------

common_app.go:377] XlatetoDB() returned empty map

db.go:1209] StartTx: Begin: w: [] tss: []

db.go:1299] performWatch: Empty WatchKeys. Skipping WATCH

db.go:1233] StartTx: End: e: <nil>

common_app.go:223] processReplace:path =/sonic-myapp:sonic-myapp/MYAPP_TABLE/myapp_first/myapp_leaf

db.go:1321] CommitTx: Begin:

db.go:1334] CommitTx: No SET|DEL done, txState: txStateWatch

db.go:456] ts2redisUpdated: Begin: *

db.go:1458] CommitTx: End: e: <nil>

db.go:418] DeleteDB: Begin: d: { client: Redis<127.0.0.1:6379 db:4>, Opts: { DBNo: 4, InitIndicator: , TableNameSeparator: |, KeySeparator: | , DisableCVLCheck: false }, txState: txStateNone, tsCmds: [] }

handler.go:72] [REST-1] Sending response 204, type=, data=

router.go:128] [REST-1] PutSonicMyappSonicMyappMyappTableMyappFirstMyappLeaf took 11.098038ms

Request any pointers on the same.

Do I need to write an application.go for handling the CRUD operations? 

(which as of now I assume is needed only for non sonic yangs).

Regards

[Anand Kumar Subramanian]

Hi Shakti,

Seems your sonic yang list name is not right.

Please refer to the sonic yang guidelines point 5 in the link below.

https://github.com/Azure/SONiC/blob/master/doc/mgmt/SONiC_YANG_Model_Guidelines.md

module sonic-myapp {

  namespace "http://github.com/Azure/sonic-myapp";

  prefix myapp;

  yang-version 1.1;

  organization "Dummy Org";

  contact "du...@dummy.com";

  description "Dummy Sonic YANG model";

  revision 2021-10-25 {

    description

      "Initial revision";

  }

  container sonic-myapp {

          description

                  "Dummy container";

          container MYAPP_TABLE {

                container myapp_first { //This has to be a list and also name has to be MYAPP_TABLE_LIST

                  leaf myapp_leaf {

                          type string;

                          default "dummy";

                  }

                }

          }

  }

}

-Anand

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[Shakti]

Thanks Anand, it worked.