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[Bug 1829852] [NEW] '--database_connection' changes when update cell with '--transport-url' only

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Eric Xie <1829852@xxxxxxxxxxxxxxxxxx>
Date: Tue, 21 May 2019 11:32:00 -0000
Reply-to: Bug 1829852 <1829852@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

Description
===========
I updated existed cell with '--transport-url' only.
Then the 'database_connection' changed to value same as cell0.

Steps to reproduce
==================
* I created one cell
nova-manage cell_v2 create_cell --name cell2 --database_connection mysql+pymysql://nova:XXX@172.16.1.20/nova --transport-url rabbit://openstack:XXX@172.16.1.21:5672/
* I updated cell2
nova-manage cell_v2 update_cell --cell_uuid 53c5c34d-b3c2-496f-986f-166e1d4d3845 --transport-url rabbit://openstack:XXX@172.16.1.19:5672/
* Check cells
nova-manage cell_v2 list_cells

Expected result
===============
+-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
|  Name |                 UUID                 |               Transport URL               |               Database Connection                |
+-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
| cell0 | 00000000-0000-0000-0000-000000000000 |                   none:/                  | mysql+pymysql://nova:****@172.16.1.14/nova_cell0 |
| cell2 | 53c5c34d-b3c2-496f-986f-166e1d4d3845 | rabbit://openstack:****@172.16.1.19:5672/ |    mysql+pymysql://nova:****@172.16.1.20/nova    |
+-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+

Actual result
=============
+-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
|  Name |                 UUID                 |               Transport URL               |               Database Connection                |
+-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
| cell0 | 00000000-0000-0000-0000-000000000000 |                   none:/                  | mysql+pymysql://nova:****@172.16.1.14/nova_cell0 |
| cell2 | 53c5c34d-b3c2-496f-986f-166e1d4d3845 | rabbit://openstack:****@172.16.1.19:5672/ |    mysql+pymysql://nova:****@172.16.1.14/nova    |
+-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+

Environment
===========
# apt list --installed | grep nova
...
python-nova/unknown,unknown,now 2:17.0.7-6~u16.01 all [installed,automatic]

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1829852

Title:
  '--database_connection' changes when update cell with '--transport-
  url' only

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========
  I updated existed cell with '--transport-url' only.
  Then the 'database_connection' changed to value same as cell0.

  Steps to reproduce
  ==================
  * I created one cell
  nova-manage cell_v2 create_cell --name cell2 --database_connection mysql+pymysql://nova:XXX@172.16.1.20/nova --transport-url rabbit://openstack:XXX@172.16.1.21:5672/
  * I updated cell2
  nova-manage cell_v2 update_cell --cell_uuid 53c5c34d-b3c2-496f-986f-166e1d4d3845 --transport-url rabbit://openstack:XXX@172.16.1.19:5672/
  * Check cells
  nova-manage cell_v2 list_cells

  Expected result
  ===============
  +-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
  |  Name |                 UUID                 |               Transport URL               |               Database Connection                |
  +-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
  | cell0 | 00000000-0000-0000-0000-000000000000 |                   none:/                  | mysql+pymysql://nova:****@172.16.1.14/nova_cell0 |
  | cell2 | 53c5c34d-b3c2-496f-986f-166e1d4d3845 | rabbit://openstack:****@172.16.1.19:5672/ |    mysql+pymysql://nova:****@172.16.1.20/nova    |
  +-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+

  Actual result
  =============
  +-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
  |  Name |                 UUID                 |               Transport URL               |               Database Connection                |
  +-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+
  | cell0 | 00000000-0000-0000-0000-000000000000 |                   none:/                  | mysql+pymysql://nova:****@172.16.1.14/nova_cell0 |
  | cell2 | 53c5c34d-b3c2-496f-986f-166e1d4d3845 | rabbit://openstack:****@172.16.1.19:5672/ |    mysql+pymysql://nova:****@172.16.1.14/nova    |
  +-------+--------------------------------------+-------------------------------------------+--------------------------------------------------+

  Environment
  ===========
  # apt list --installed | grep nova
  ...
  python-nova/unknown,unknown,now 2:17.0.7-6~u16.01 all [installed,automatic]

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