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[nova] [ops] Problems running db sync for nova (Ocata --> Pike)


We think that the problem was 390 in nova_prod_cell0.migrate_version.
Instead it should be 362.

No idea how this happened ...

We have manually changed that value to 362 and the db_sync worked



On Tue, Jul 16, 2019 at 1:16 PM Massimo Sgaravatto <
massimo.sgaravatto at gmail.com> wrote:

> My understanding (e.g. from #comment 1 of this bug:
> https://bugs.launchpad.net/grenade/+bug/1761775) is that --local-cell
> updates only the database specified as connection in [database], i.e. not
> also the cell0 database
>
> On Tue, Jul 16, 2019 at 1:12 PM Eugen Block <eblock at nde.ag> wrote:
>
>> AFAIK cell0 is the local cell, isn't it? I'm not sure, maybe someone
>> else can shed some light on this.
>>
>>
>> Zitat von Massimo Sgaravatto <massimo.sgaravatto at gmail.com>:
>>
>> > Mmm.
>> > Doesn't "--local_cell" mean that cell0 is not updated ?
>> > I was already using cell0 in Ocata ...
>> >
>> > Cheers, Massimo
>> >
>> > On Tue, Jul 16, 2019 at 12:52 PM Eugen Block <eblock at nde.ag> wrote:
>> >
>> >> Hi,
>> >>
>> >> I think you need to run
>> >>
>> >> nova-manage db sync --local_cell
>> >>
>> >> in Ocata. I can't quite remember the reason, but you should try it.
>> >> I had the same problems and this command worked out for me.
>> >>
>> >> Regards,
>> >> Eugen
>> >>
>> >>
>> >>
>> >> Zitat von Massimo Sgaravatto <massimo.sgaravatto at gmail.com>:
>> >>
>> >> > Resending with the right tags in the subject line ...
>> >> >
>> >> >
>> >> > Hi
>> >> >
>> >> > We are trying to update our Ocata cloud to Pike  (this is the first
>> step:
>> >> > we will go through Ocata --> Pike --> Queens --> Rocky) but we have a
>> >> > problem with nova-manage db sync:
>> >> >
>> >> >
>> >> > [root at cld-ctrl-01 ~]# su -s /bin/sh -c "nova-manage db sync" nova
>> >> > ERROR: Could not access cell0.
>> >> > Has the nova_api database been created?
>> >> > Has the nova_cell0 database been created?
>> >> > Has "nova-manage api_db sync" been run?
>> >> > Has "nova-manage cell_v2 map_cell0" been run?
>> >> > Is [api_database]/connection set in nova.conf?
>> >> > Is the cell0 database connection URL correct?
>> >> > Error: "Database schema file with version 390 doesn't exist."
>> >> >
>> >> > We have these settings in nova.conf:
>> >> >
>> >> > [database]
>> >> > connection = mysql+pymysql://
>> nova_prod:xyz at 192.168.60.10:6306/nova_prod
>> >> > [api_database]
>> >> > connection = mysql+pymysql://
>> >> > nova_api_prod:xyz at 192.168.60.10:6306/nova_api_prod
>> >> >
>> >> > I can't see problems accessing the databases. i.e. these commands
>> work:
>> >> >
>> >> > mysql -u nova_api_prod -pxyz -h 192.168.60.10 -P 6306 nova_api_prod
>> >> >
>> >> > mysql -u nova_prod -pxyz -h 192.168.60.10 -P 6306 nova_prod
>> >> >
>> >> >  mysql -u nova_prod -pxyz -h 192.168.60.10 -P 6306 nova_prod_cell0
>> >> >
>> >> > If I try to rerun nova-manage cell_v2 map_cell0:
>> >> >
>> >> > [root at cld-ctrl-01 ~]# nova-manage cell_v2 map_cell0
>> >> > Cell0 is already setup
>> >> >
>> >> >
>> >> > [root at cld-ctrl-01 ~]# su -s /bin/sh -c "nova-manage api_db version"
>> nova
>> >> > 45
>> >> >
>> >> > [root at cld-ctrl-01 ~]# su -s /bin/sh -c "nova-manage db version" nova
>> >> > 362
>> >> >
>> >> > [root at cld-ctrl-01 ~]# nova-manage cell_v2 list_cells
>> >> >
>> >>
>> +-------+--------------------------------------+--------------------------------------------------+-------------------------------------------------------------------+
>> >> > |  Name |                 UUID                 |
>> >> Transport
>> >> > URL                   |                        Database Connection
>> >> >                |
>> >> >
>> >>
>> +-------+--------------------------------------+--------------------------------------------------+-------------------------------------------------------------------+
>> >> > | cell0 | 00000000-0000-0000-0000-000000000000 |
>> >> > none:///                     | mysql+pymysql://nova_prod:****@
>> >> > 192.168.60.10:6306/nova_prod_cell0 |
>> >> > | cell1 | 5e42faa0-710b-4967-bb42-fcf53602c96e |
>> >> > rabbit://openstack_prod:****@192.168.60.183:5672 |
>> >> >  mysql+pymysql://nova_prod:****@192.168.60.10:6306/nova_prod    |
>> >> >
>> >>
>> +-------+--------------------------------------+--------------------------------------------------+-------------------------------------------------------------------+
>> >> >
>> >> > Following some doc we also tried to specify the
>> --database_connection /
>> >> > --database-connection argument, but this seems not working
>> >> >
>> >> >
>> >> > Setting nova in debug mode, this is the last entry in the
>> nova-manage log
>> >> > file:
>> >> >
>> >> > 2019-07-16 12:11:42.774 22013 DEBUG migrate.versioning.repository
>> >> > [req-8ca52407-dbe1-4a62-ad6c-16631c2a9a06 - - - - -] Config:
>> >> > OrderedDict([('db_settings', OrderedDict([('__name__',
>> 'db_settings'),
>> >> > ('repository_id', 'nova'), ('version_table', 'migrate_version'),
>> >> > ('required_dbs', '[]')]))]) __init__
>> >> > /usr/lib/python2.7/site-packages/migrate/versioning/repository.py:83
>> >> >
>> >> > Any hints ?
>> >> >
>> >> > Thanks, Massimo
>> >> > 
>> >> > 
>> >> > OpenStack Discuss
>> >>
>> >>
>> >>
>> >>
>> >>
>>
>>
>>
>>
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