Add parameter for vagrant provider override

[msheiny]

See the docs for additional info on this option:
https://www.vagrantup.com/docs/providers/configuration.html#overriding-configuration

While trying to disable nfs explicitly on a box that had it enabled... doing an over-ride on the provider was the only way I could get it working 🤷‍♂️ This might be a libvirt specific problem but adding this option fixed it for me and its optional.

[retr0h]

@msheiny can you provide more information, specifically usage of your new option.

[msheiny]

sureeeeeeeee @retr0h i'm specifically using it in this scenario:

molecule.yml:

driver:
  name: vagrant
  provider:
    name: libvirt
platforms:
  - name: app-staging
    box: fpf/securedrop-app
    box_url: "../vagrant_packager/box_files/app_metadata.json"
    box_version: "0.6"
    instance_raw_config_args:
      - "ssh.insert_key = false"
    provider_override_args:
      - "vm.synced_folder './', '/vagrant', disabled: true, type: 'nfs'"
    memory: 1024
    private_ip: 10.0.1.2
    groups:
      - securedrop_application_server
      - securedrop
      - staging

I'm trying to disable synced folder mapping and NFS for the underlying box. No matter where else I try to put the NFS value I was unable to stop vagrant from bombing out without sticking it under the override key.

[retr0h]

Thanks @msheiny can you add this example to https://github.com/metacloud/molecule/blob/master/doc/source/configuration.rst#molecule-vagrant-module ? I'll release 2.13 once your PR is complete.

[retr0h]

Thanks @msheiny can you add this example to https://github.com/metacloud/molecule/blob/master/doc/source/configuration.rst#molecule-vagrant-module ? I'll release 2.13 once your PR is complete.

I'll do this.

[retr0h]

Will this disable folder syncing, if adding to platforms section?

config_options:
  synced_folder: False