pygnmi_call

Task plugin to manage devices over gNMI protocol.

Requires PyGNMI library to be installed:

pip install pygnmi

This task plugin is a wrapper around gNMIclient connection object and allows to execute any of its methods supplying method name using call attribute.

Sample code to run pygnmi_call task:

from nornir import InitNornir
from nornir_salt import pygnmi_call

nr = InitNornir(config_file="config.yaml")

# get device capabilities
capabilities = nr.run(
    task=pygnmi_call,
    call="capabilities"
)

# get interfaces configuration
get_output = nr.run(
    task=pygnmi_call,
    call="get",
    path=["openconfig-interfaces:interfaces"]
)

# update interface description
update_output = nr.run(
    task=pygnmi_call,
    call="update",
    update=[
        (
            "openconfig-interfaces:interfaces/interface[name=Loopback100]/config",
            {"description": "Done by gNMI"}
        )
    ]
)

# delete interface configuration
delete_output = nr.run(
    task=pygnmi_call,
    call="delete",
    delete=[
        "openconfig-interfaces:interfaces/interface[name=Loopback1234]"
    ]
)

# replace interface configuration
replace_output = nr.run(
    task=pygnmi_call,
    call="replace",
    replace=[
        (
            "openconfig-interfaces:interfaces/interface[name=Loopback1234]/config",
            {"name": "Loopback1234", "description": "New"}
        )
    ]
)

In addition to calling gNMIclient methods, extra call functions supported such as help, dir, delete, replace and update. Extra functions can be invoked in the same way as gNMIclient connection object methods by passing their name as a call attribute:

from nornir import InitNornir
from nornir_salt import pygnmi_call

nr = InitNornir(config_file="config.yaml")

available_methods = nr.run(
    task=pygnmi_call,
    call="dir",
)

pygnmi_call Reference

nornir_salt.plugins.tasks.pygnmi_call.pygnmi_call(task: nornir.core.task.Task, call: str, name_arg: Optional[str] = None, **kwargs) nornir.core.task.Result

Task to call one of PyGNMI gNMIclient object methods or one of additional helper functions.

Parameters
  • call – (str) gNMIclient connection object method to call

  • arg – (list) any *args to use with call method

  • kwargs – (dict) any **kwargs to use with call method

  • name_arg – (str) used as “name” argument with call method, need it only because “name” argument used by “Nornir.run” method itself ans collides with the case when need to pass gNMI path name argument to this task

Special handling given to path, delete, replace and updated kwargs arguments to comply with gNMIclient requirements:

  1. If path is a string, convert it to a list splitting it by , character

  2. If delete is a string, convert it to a list splitting it by , character

  3. If replace is a list, transform each list item to a tuple

  4. If update is a list, transform each list item to a tuple

Additional Call Functions

delete

nornir_salt.plugins.tasks.pygnmi_call._call_delete(connection, path: list, **kwargs)

Delete function helps to delete configuration elements matched by provided paths strings.

This function effectively takes arguments provided and uses gNMIclient set method supplying it with delete argument list that consists of path items strings.

Parameters
  • connection – (obj) gNMIclient object

  • path – (list) path items to delete

Sample code to run delete function task:

from nornir import InitNornir
from nornir_salt import pygnmi_call

nr = InitNornir(config_file="config.yaml")

output = nr.run(
    task=pygnmi_call,
    call="delete",
    path=["openconfig-interfaces:interfaces/interface[name=Loopback100]"]
)

dir

nornir_salt.plugins.tasks.pygnmi_call._call_dir(connection, **kwargs)

Function to return a list of gNMIclient available methods/operations

help

nornir_salt.plugins.tasks.pygnmi_call._call_help(connection, method_name: str, **kwargs)

Helper function to return docstring for requested method

Parameters

method_name – (str) name of method or function to return docstring for

replace

nornir_salt.plugins.tasks.pygnmi_call._call_replace(connection, path: list, **kwargs)

Replace function helps to replace configuration for elements matched by single path string.

This function effectively takes arguments provided and uses gNMIclient set method supplying it with replace argument list that consists of single tuple element, this tuple’s first item is a provided path string with second item being a dictionary of provided **kwargs containing configuration to be replaced.

Parameters
  • connection – (obj) gNMIclient object

  • path – (list) list with single item - path to element to update config for

  • kwargs – (dict) configuration parameters to replace

Sample code to run replace function task:

from nornir import InitNornir
from nornir_salt import pygnmi_call

nr = InitNornir(config_file="config.yaml")

output = nr.run(
    task=pygnmi_call,
    call="replace",
    path="openconfig-interfaces:interfaces/interface[name=Loopback100]/config",
    name="Loopback100",
    description="Loopback Description"
)

update

nornir_salt.plugins.tasks.pygnmi_call._call_update(connection, path: list, **kwargs)

Udate function helps to update configuration for elements matched by single path string.

This function effectively takes arguments provided and uses gNMIclient set method supplying it with update argument list that consists of single tuple element, this tuple’s first item is a provided path string with second item being a dictionary of provided **kwargs containing configuration to be updated.

Parameters
  • connection – (obj) gNMIclient object

  • path – (list) list with single item - path to element to update config for

  • kwargs – (dict) configuration parameters to update

Sample code to run replace function task:

from nornir import InitNornir
from nornir_salt import pygnmi_call

nr = InitNornir(config_file="config.yaml")

output = nr.run(
    task=pygnmi_call,
    call="update",
    path="openconfig-interfaces:interfaces/interface[name=Loopback100]/config",
    description="Updated Loopback Description"
)