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90 lines
3.3 KiB
Python
90 lines
3.3 KiB
Python
import logging
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from django.utils.encoding import smart_text
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from awx.main.utils.common import parse_yaml_or_json
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logger = logging.getLogger('awx.main.migrations')
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def _get_instance_id(from_dict, new_id, default=''):
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'''logic mostly duplicated with inventory_import command Command._get_instance_id
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frozen in time here, for purposes of migrations
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'''
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instance_id = default
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for key in new_id.split('.'):
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if not hasattr(from_dict, 'get'):
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instance_id = default
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break
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instance_id = from_dict.get(key, default)
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from_dict = instance_id
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return smart_text(instance_id)
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def _get_instance_id_for_upgrade(host, new_id):
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if host.instance_id:
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# this should not have happened, but nothing to really do about it...
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logger.debug('Unexpectedly, host {}-{} has instance_id set'.format(host.name, host.pk))
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return None
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host_vars = parse_yaml_or_json(host.variables)
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new_id_value = _get_instance_id(host_vars, new_id)
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if not new_id_value:
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# another source type with overwrite_vars or pesky users could have done this
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logger.info('Host {}-{} has no {} var, probably due to separate modifications'.format(
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host.name, host.pk, new_id
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))
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return None
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if len(new_id) > 255:
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# this should never happen
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logger.warn('Computed instance id "{}"" for host {}-{} is too long'.format(
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new_id_value, host.name, host.pk
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))
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return None
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return new_id_value
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def set_new_instance_id(apps, source, new_id):
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'''This methods adds an instance_id in cases where there was not one before
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'''
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from django.conf import settings
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id_from_settings = getattr(settings, '{}_INSTANCE_ID_VAR'.format(source.upper()))
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if id_from_settings != new_id:
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# User applied an instance ID themselves, so nope on out of there
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logger.warn('You have an instance ID set for {}, not migrating'.format(source))
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return
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logger.debug('Migrating inventory instance_id for {} to {}'.format(source, new_id))
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Host = apps.get_model('main', 'Host')
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modified_ct = 0
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for host in Host.objects.filter(inventory_sources__source=source).iterator():
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new_id_value = _get_instance_id_for_upgrade(host, new_id)
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if not new_id_value:
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continue
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host.instance_id = new_id_value
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host.save(update_fields=['instance_id'])
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modified_ct += 1
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if modified_ct:
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logger.info('Migrated instance ID for {} hosts imported by {} source'.format(
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modified_ct, source
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))
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def back_out_new_instance_id(apps, source, new_id):
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Host = apps.get_model('main', 'Host')
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modified_ct = 0
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for host in Host.objects.filter(inventory_sources__source=source).iterator():
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host_vars = parse_yaml_or_json(host.variables)
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predicted_id_value = _get_instance_id(host_vars, new_id)
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if predicted_id_value != host.instance_id:
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logger.debug('Host {}-{} did not get its instance_id from {}, skipping'.format(
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host.name, host.pk, new_id
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))
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continue
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host.instance_id = ''
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host.save(update_fields=['instance_id'])
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modified_ct += 1
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if modified_ct:
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logger.info('Reverse migrated instance ID for {} hosts imported by {} source'.format(
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modified_ct, source
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))
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