add management command to report total quotas

[jtriley]

It would be useful to have a management command that reports the total quota values across all allocations

This command could also do the same on a per-project basis.

Some proof-of-concept code:

import yaml

from django.core.management.base import BaseCommand
from django.core.exceptions import ObjectDoesNotExist

from coldfront_plugin_cloud import attributes
from coldfront_plugin_cloud import openstack
from coldfront.core.resource.models import (Resource, ResourceType)
from coldfront.core.allocation.models import (Allocation, AllocationStatusChoice)


class Command(BaseCommand):
    help = 'Show cloud quotas (OpenShift and OpenStack)'

    def add_arguments(self, parser):
        parser.add_argument('type', choices=['all', 'OpenStack', 'OpenShift'], help='cloud type')
        parser.add_argument('--project-id', help='limit scope to project id')

    def get_quota_totals(self, cloud_type):
        try:
            resources = Resource.objects.filter(
                resource_type=ResourceType.objects.get(
                    name=cloud_type,
                )
            )
        except ObjectDoesNotExist as e:
            print(f'Skpping {cloud_type} - resource type does not exist')
            return 1


        allocations = Allocation.objects.filter(
            resources__in=resources,
            status=AllocationStatusChoice.objects.get(name='Active')
        )

        totals = {}

        for attr in attributes.ALLOCATION_QUOTA_ATTRIBUTES:
            if cloud_type in attr:
                total = 0
                for allocation in allocations:
                    try:
                        val = float(allocation.get_attribute(attr))
                        total += val
                    except TypeError:
                        continue
                totals[attr] = total
        print(yaml.dump(totals).strip())

    def handle(self, *args, **options):
        if (t := options['type']) != 'all':
            self.get_quota_totals(t)
        else:
            self.get_quota_totals('OpenStack')
            self.get_quota_totals('OpenShift')