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66 lines
2.5 KiB
Python
66 lines
2.5 KiB
Python
# Copyright (c) 2015 Ansible, Inc.
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# All Rights Reserved
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from django.core.management.base import CommandError
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from django.db import transaction
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from awx.main.management.commands._base_instance import BaseCommandInstance
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from awx.api.license import feature_enabled
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from awx.main.models import Instance
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instance_str = BaseCommandInstance.instance_str
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class Command(BaseCommandInstance):
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"""Set an already registered instance to primary or secondary for HA
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tracking.
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This command is idempotent. Settings a new primary instance when a
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primary instance already exists will result in the existing primary
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instance set to secondary and the new primary set to primary.
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This command will error out under the following circumstances:
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* Attempting to update a secondary instance with no primary instances.
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* When a matching instance is not found.
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"""
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def __init__(self):
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super(Command, self).__init__()
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self.include_option_primary_role()
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self.include_option_hostname_uuid_find()
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@transaction.atomic
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def handle(self, *args, **options):
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super(Command, self).handle(*args, **options)
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# You can only promote/demote if your license allows HA
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if not feature_enabled('ha'):
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raise CommandError('Your Tower license does not permit promoting a secondary instance')
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# Is there an existing record for this machine? If so, retrieve that record and look for issues.
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try:
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instance = Instance.objects.get(**self.get_unique_fields())
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except Instance.DoesNotExist:
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raise CommandError('No matching instance found to update.')
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# Get a status on primary machines (excluding this one, regardless of its status).
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other_instances = Instance.objects.exclude(**self.get_unique_fields())
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primaries = other_instances.filter(primary=True).count()
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# If this is a primary machine and there is another primary machine, it must be de-primary-ified.
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if self.is_option_primary() and primaries:
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for old_primary in other_instances.filter(primary=True):
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old_primary.primary = False
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old_primary.save()
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# Okay, we've checked for appropriate errata; perform the registration.
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instance.primary = self.is_option_primary()
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instance.save()
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# If this is a primary instance, update projects.
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if self.is_option_primary():
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self.update_projects(instance)
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# Done!
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print('Successfully updated instance role %s' % instance_str(instance))
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