On IOS versions 17.06.04 or 17.10.01 I am not able to load the yang modules, I get the following error:
ydk.errors.YInvalidArgumentError: Path is invalid: Cisco-IOS-XE-native:native
However, version 16.12.08 works without any issues. Seems that Yang models are placed in /root/.ydk/192.168.1.142. If this folder exists and has yang models from 16.12.08 version, and switch gets upgraded to 17.06.04, YDK works as "old" models are kept and not overwritten. If I however remove the folder and start from scratch, I get error. I tested also with 17.10.01 which exhibits the same issue...
I am generating python bindings using ydk-gen, however this seems to be an issue of specific version of models.
Here are relevant logs (I removed what seemed to be irrelevant):
[INFO ] Path where models are to be downloaded: /root/.ydk/192.168.1.142
[DEBUG ] Creating libyang context in path: /root/.ydk/192.168.1.142
[ERROR ] Data is invalid according to the yang model. Libyang error: Invalid keyword "+".
[ERROR ] Data is invalid according to the yang model. Libyang error: Module "Cisco-IOS-XE-native" parsing failed.
[ERROR ] Data is invalid according to the yang model. Libyang error: Importing "Cisco-IOS-XE-native" module into "Cisco-IOS-XE-vrrp-deviation" failed.
[ERROR ] Data is invalid according to the yang model. Libyang error: Module "Cisco-IOS-XE-vrrp-deviation" parsing failed.
[DEBUG ] Creating root data node with path '/Cisco-IOS-XE-native:native'
[ERROR ] Data is invalid according to the yang model. Libyang error: Module not found. Path: '/Cisco-IOS-XE-native'
[ERROR ] Path 'Cisco-IOS-XE-native:native' is invalid
[CRITICAL] Failed to load grains defined in grain file cisco_ydk.cisco_ydk in function <LoadedFunc name='cisco_ydk.cisco_ydk'>, error:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/ydk/errors/error_handler.py", line 50, in handle_runtime_error
yield
File "/usr/local/lib/python3.8/dist-packages/ydk/services/crud_service.py", line 88, in _crud_read
read_top_entity = crud_call(provider, top_filters)
RuntimeError: YInvalidArgumentError: Path is invalid: Cisco-IOS-XE-native:native
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/salt/loader/__init__.py", line 943, in grains
ret = funcs[key](**kwargs)
File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 149, in __call__
return self.loader.run(run_func, *args, **kwargs)
File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 1201, in run
return self._last_context.run(self._run_as, _func_or_method, *args, **kwargs)
File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 1216, in _run_as
return _func_or_method(*args, **kwargs)
File "/var/cache/salt/proxy/extmods/1009-cisco/grains/cisco_ydk.py", line 37, in cisco_ydk
return {"cisco_ydk": proxy["cisco_ydk.get_facts"]()}
File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 149, in __call__
return self.loader.run(run_func, *args, **kwargs)
File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 1201, in run
return self._last_context.run(self._run_as, _func_or_method, *args, **kwargs)
File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 1216, in _run_as
return _func_or_method(*args, **kwargs)
File "/var/cache/salt/proxy/extmods/1009-cisco/proxy/cisco_ydk.py", line 316, in get_facts
result = crud_service.read(dev, read_filter)
File "/usr/local/lib/python3.8/dist-packages/ydk/services/crud_service.py", line 60, in read
return _crud_read(provider, read_filter, False, self._crud.read)
File "/usr/local/lib/python3.8/dist-packages/ydk/services/crud_service.py", line 88, in _crud_read
read_top_entity = crud_call(provider, top_filters)
File "/usr/lib/python3.8/contextlib.py", line 131, in __exit__
self.gen.throw(type, value, traceback)
File "/usr/local/lib/python3.8/dist-packages/ydk/errors/error_handler.py", line 69, in handle_runtime_error
raise _exc
ydk.errors.YInvalidArgumentError: Path is invalid: Cisco-IOS-XE-native:native
