Provide hints when nova-manage db sync fails to sync cell0
Lots of people get tripped up on the error message when syncing cell0 fails and the question asked is confusing and possibly misleading, so this change includes several questions for troubleshooting and also dumps the actual error message. Related-Bug: #1706118 Change-Id: I865f76705f10493152af50b9842c6fedc563fea4
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@ -732,9 +732,15 @@ class DbCommands(object):
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except exception.CellMappingNotFound:
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print(_('WARNING: cell0 mapping not found - not'
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' syncing cell0.'))
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except Exception:
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print(_('ERROR: could not access cell mapping database - has'
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' api db been created?'))
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except Exception as e:
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print(_("""ERROR: Could not access cell0.
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Has the nova_api database been created?
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Has the nova_cell0 database been created?
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Has "nova-manage api_db sync" been run?
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Has "nova-manage cell_v2 map_cell0" been run?
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Is [api_database]/connection set in nova.conf?
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Is the cell0 database connection URL correct?
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Error: %s""") % six.text_type(e))
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return migration.db_sync(version)
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def version(self):
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@ -567,6 +567,27 @@ Archiving.....stopped
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]
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mock_db_sync.assert_has_calls(db_sync_calls)
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@mock.patch.object(objects.CellMapping, 'get_by_uuid',
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side_effect=test.TestingException('invalid connection'))
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def test_sync_cell0_unknown_error(self, mock_get_by_uuid):
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"""Asserts that a detailed error message is given when an unknown
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error occurs trying to get the cell0 cell mapping.
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"""
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self.commands.sync()
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mock_get_by_uuid.assert_called_once_with(
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test.MatchType(context.RequestContext),
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objects.CellMapping.CELL0_UUID)
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expected = """ERROR: Could not access cell0.
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Has the nova_api database been created?
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Has the nova_cell0 database been created?
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Has "nova-manage api_db sync" been run?
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Has "nova-manage cell_v2 map_cell0" been run?
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Is [api_database]/connection set in nova.conf?
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Is the cell0 database connection URL correct?
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Error: invalid connection
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"""
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self.assertEqual(expected, self.output.getvalue())
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def _fake_db_command(self, migrations=None):
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if migrations is None:
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mock_mig_1 = mock.MagicMock(__name__="mock_mig_1")
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