Fron time to time I use to move entries related to deleted instances to shadow tables, using the command:

nova-manage db archive_deleted_rows

This is now failing [*] for the instance_metadata table because of a 'duplicate entry for the primary key' problem:

DBDuplicateEntry: (pymysql.err.IntegrityError) (1062, u"Duplicate entry '6' for key 'PRIMARY'") [SQL: u'INSERT INTO shadow_instance_metadata (created_at, updated_at, deleted_at, deleted, id, `key`, value, instance_uuid) SELECT instance_metadata.created_at, instance_metadata.updated_at, instance_metadata.deleted_at, instance_metadata.deleted, instance_metadata.id, instance_metadata.`key`, instance_metadata.value, instance_metadata.instance_uuid \nFROM instance_metadata \nWHERE instance_metadata.deleted != %(deleted_1)s ORDER BY instance_metadata.id \n LIMIT %(param_1)s'] [parameters: {u'param_1': 1, u'deleted_1': 0}]

Indeed:

mysql> SELECT instance_metadata.created_at, instance_metadata.updated_at, instance_metadata.deleted_at, instance_metadata.deleted, instance_metadata.id, instance_metadata.`key`, instance_metadata.value, instance_metadata.instance_uuid FROM instance_metadata WHERE instance_metadata.deleted != 0 ORDER BY instance_metadata.id limit 1;

+---------------------+------------+---------------------+---------+----+-------+-------+--------------------------------------+

+---------------------+------------+---------------------+---------+----+-------+-------+--------------------------------------+

| 2018-09-20 07:40:56 | NULL | 2018-09-20 07:54:26 | 6 | 6 | group | node | a9000ff7-2298-454c-bf71-9e3c62ec0f3c |

+---------------------+------------+---------------------+---------+----+-------+-------+--------------------------------------+

1 row in set (0.00 sec)

But there is a 5-years old entry (if I am not wrong we were running Havana at that time) in the shadow table with that id:

mysql> select * from shadow_instance_metadata where id='6';

+---------------------+------------+---------------------+----+----------+---------------------+--------------------------------------+---------+

+---------------------+------------+---------------------+----+----------+---------------------+--------------------------------------+---------+

| 2014-11-04 12:57:10 | NULL | 2014-11-04 13:06:45 | 6 | director | microbosh-openstack | 5db5b17b-69f2-4f0a-bdd2-efe710268021 | 6 |

+---------------------+------------+---------------------+----+----------+---------------------+--------------------------------------+---------+

1 row in set (0.00 sec)

mysql>

I wonder how could that happen.

Can I simply remove that entry from the shadow table (I am not really interested to keep it) or are there better (cleaner) way to fix the problem ?

This Cloud is now running Ocata

Thanks, Massimo

[*]

[root@cld-ctrl-01 ~]# nova-manage db archive_deleted_rows --max_rows 1000 --verbose

An error has occurred:

Traceback (most recent call last):

File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 1617, in main

ret = fn(*fn_args, **fn_kwargs)

File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 691, in archive_deleted_rows

run = db.archive_deleted_rows(max_rows)

File "/usr/lib/python2.7/site-packages/nova/db/api.py", line 2040, in archive_deleted_rows

return IMPL.archive_deleted_rows(max_rows=max_rows)

File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 6564, in archive_deleted_rows

tablename, max_rows=max_rows - total_rows_archived)

File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 6513, in _archive_deleted_rows_for_table

conn.execute(insert)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 914, in execute

return meth(self, multiparams, params)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/elements.py", line 323, in _execute_on_connection

return connection._execute_clauseelement(self, multiparams, params)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1010, in _execute_clauseelement

compiled_sql, distilled_params

File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1146, in _execute_context

context)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1337, in _handle_dbapi_exception

util.raise_from_cause(newraise, exc_info)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause

reraise(type(exception), exception, tb=exc_tb)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1139, in _execute_context

context)

File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/default.py", line 450, in do_execute

cursor.execute(statement, parameters)

File "/usr/lib/python2.7/site-packages/pymysql/cursors.py", line 165, in execute

result = self._query(query)

File "/usr/lib/python2.7/site-packages/pymysql/cursors.py", line 321, in _query

conn.query(q)

File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 860, in query

self._affected_rows = self._read_query_result(unbuffered=unbuffered)

File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1061, in _read_query_result

result.read()

File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1349, in read

first_packet = self.connection._read_packet()

File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 1018, in _read_packet

packet.check_error()

File "/usr/lib/python2.7/site-packages/pymysql/connections.py", line 384, in check_error

err.raise_mysql_exception(self._data)

File "/usr/lib/python2.7/site-packages/pymysql/err.py", line 107, in raise_mysql_exception

raise errorclass(errno, errval)

[root@cld-ctrl-01 ~]#