Is there any way with out using the nova-client from the compute host, to access the nova database?
I tried, using the /nova/db/api.py and /nova/db/sqlalchemy/api.py class definitions for accessing the database but failed to get the data.
I get this error for the sample def. i have written.
File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 5263, in sampledata_by_host
filter(models.Instance.host == host_name).all()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2115, in all
return list(self)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2227, in __iter__
return self._execute_and_instances(context)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2240, in _execute_and_instances
close_with_result=True)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2231, in _connection_from_session
**kw)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 730, in connection
close_with_result=close_with_result)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 736, in _connection_for_bind
return engine.contextual_connect(**kwargs)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2490, in contextual_connect
self.pool.connect(),
File "/usr/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 224, in connect
return _ConnectionFairy(self).checkout()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 387, in __init__
rec = self._connection_record = pool._do_get()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 802, in _do_get
return self._create_connection()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 188, in _create_connection
return _ConnectionRecord(self)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 270, in __init__
self.connection = self.__connect()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 330, in __connect
connection = self.__pool._creator()
File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/strategies.py", line 80, in connect
return dialect.connect(*cargs, **cparams)
File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 281, in connect
return self.dbapi.connect(*cargs, **cparams)
OperationalError: (OperationalError) unable to open database file None None
