Feat(eos_designs): Relax mode in structured config

[gmuloc]

Change Summary

This pull request introduces a relaxed mode to validate the schema when handling structured_configuration (not custom_structured_configuration) in eos_designs. This relaxed validation mode ignore missing required keys.

Related Issue(s)

Component(s) name

arista.avd.eos_designs

Proposed changes

• Introduce a relaxed_validation boolean key in the metaschema to be able to indicate in the schema which keys (and their children) should use the relaxed validation mode
• Set relaxed_validation: true for all existing structured_config keys in eos_designs
• adjust the validation code to ignore required keys when relaxed_validation is true
• Set a required key in the aaa.accounting model in eos_cli_config_gen for testing

NOTE

The relaxed_validation key is for now allowed only for dict type in the metaschema. It can be added to the others later if/when use cases arise.

How to test

Added a molecule test

Checklist

Repository Checklist

• My code has been rebased from devel before I start
• I have read the CONTRIBUTING document.
• My change requires a change to the documentation and documentation have been updated accordingly.
• I have updated molecule CI testing accordingly. (check the box if not applicable)

[github-actions]

Review docs on Read the Docs

To test this pull request:

# Create virtual environment for this testing below the current directory
python -m venv test-avd-pr-4784
# Activate the virtual environment
source test-avd-pr-4784/bin/activate
# Install all requirements including PyAVD
pip install "pyavd[ansible] @ git+https://github.com/gmuloc/avd.git@relax-mode-in-structured-config#subdirectory=python-avd" --force
# Point Ansible collections path to the Python virtual environment
export ANSIBLE_COLLECTIONS_PATH=$VIRTUAL_ENV/ansible_collections
# Install Ansible collection
ansible-galaxy collection install git+https://github.com/gmuloc/avd.git#/ansible_collections/arista/avd/,relax-mode-in-structured-config --force
# Optional: Install AVD examples
cd test-avd-pr-4784
ansible-playbook arista.avd.install_examples

[ClausHolbechArista]

it is still in draft, but looks good to me.

[gmuloc]

@ClausHolbechArista the next steps will be to go over eos_cli_config_gen and start to see where to add required keys.

[carlbuchmann]

@gmuloc can you add a brief change summary on this PR?

[emilarista]

Tested with absent router_isis.instance key in structured_config which generates schema errors with devel, but with this PR the relaxed validation ignores it. LGTM!