Hierarchical Configuration is a python library that is able to take a running configuration of a network device, compare it to its intended configuration, and build the remediation steps necessary bring a device into spec with its intended configuration.
Hierarchical Configuraiton has been used extensively on:
- Cisco IOS
- Cisco IOSXR
- Cisco NXOS
- Arista EOS
However, any NOS that utilizes a CLI syntax that is structured in a similar fasion to IOS should work mostly out of the box.
The code documentation can be found at: https://netdevops.io/hier_config/
Hierarchical Configuration can be installed directly from github or with pip:
- Github
git clone [email protected]:netdevops/hier_config.git
cd hier_config; ./setup.py install
- Pip
pip install hier-config
In the below example, we create two hierarchical configuration objects, load one with a running configuration from a device, and the other with the intended configuration of the device, then we compare the two objects to derive the commands necessary to bring the device into spec.
>>> from hier_config import HConfig
>>> from hier_config.host import Host
>>> import yaml
>>>
>>> options = yaml.load(open('./tests/files/test_options_ios.yml'))
>>> host = Host('example.rtr', 'ios', options)
>>>
>>> # Build HConfig object for the Running Config
...
>>> running_config_hier = HConfig(host=host)
>>> running_config_hier.load_from_file('./tests/files/running_config.conf')
>>>
>>> # Build Hierarchical Configuration object for the Compiled Config
...
>>> compiled_config_hier = HConfig(host=host)
>>> compiled_config_hier.load_from_file('./tests/files/compiled_config.conf')
>>>
>>> # Build Hierarchical Configuration object for the Remediation Config
...
>>> remediation_config_hier = running_config_hier.config_to_get_to(compiled_config_hier)
>>>
>>> for line in remediation_config_hier.all_children():
... print(line.cisco_style_text())
...
vlan 3
name switch_mgmt_10.0.3.0/24
vlan 4
name switch_mgmt_10.0.4.0/24
interface Vlan2
no shutdown
mtu 9000
ip access-group TEST in
interface Vlan3
description switch_mgmt_10.0.3.0/24
ip address 10.0.3.1 255.255.0.0
interface Vlan4
mtu 9000
description switch_mgmt_10.0.4.0/24
ip address 10.0.4.1 255.255.0.0
ip access-group TEST in
no shutdown
The files in the example can be seen in the tests/files folder.
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