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[OpenStack Infra <1656276@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/422248
Committed: https://git.openstack.org/cgit/openstack/puppet-nova/commit/?id=dc2f3a358663c0fb97795666b16dec63cfcc3872
Submitter: Jenkins
Branch:    master

commit dc2f3a358663c0fb97795666b16dec63cfcc3872
Author: Oliver Walsh <owalsh@xxxxxxxxxx>
Date:   Wed Jan 18 21:26:43 2017 +0000

    Implement a proper cell_v2 setup
    
    Rather than use simple_cell_setup which expects that there are already
    existing computes, this change uses map_cell0 & create_cell to setup
    cell_v2. Once the computes are configured, the cell_v2 discover_hosts
    should be used to finalized the installation.
    
    In addition, the db syncs need to be reordered as the api db sync
    should run before the the cell_v2 setup. The main db sync should run
    after.
    
    map_cell0/simple_cell_setup now uses main nova DB connection instead
    of the api DB connection.
    
    Change-Id: I591b451197dc3bd0783978f5e3d2b1c830afe54e
    Closes-Bug: #1656276
    Related-Bug: #1656673
    Co-Authored-By: Alex Schultz <aschultz@xxxxxxxxxx>


** Changed in: puppet-nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1656276

Title:
  Error running nova-manage  cell_v2 simple_cell_setup when configuring
  nova with puppet-nova

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) newton series:
  New
Status in Packstack:
  New
Status in puppet-nova:
  Fix Released
Status in tripleo:
  Triaged

Bug description:
  When installing and configuring nova with puppet-nova (with either
  tripleo, packstack or puppet-openstack-integration), we are getting
  following errors:

  Debug: Executing: '/usr/bin/nova-manage  cell_v2 simple_cell_setup --transport-url=rabbit://guest:guest@172.19.2.159:5672/?ssl=0'
  Debug: /Stage[main]/Nova::Db::Sync_cell_v2/Exec[nova-cell_v2-simple-cell-setup]/returns: Sleeping for 5 seconds between tries
  Notice: /Stage[main]/Nova::Db::Sync_cell_v2/Exec[nova-cell_v2-simple-cell-setup]/returns: Cell0 is already setup.
  Notice: /Stage[main]/Nova::Db::Sync_cell_v2/Exec[nova-cell_v2-simple-cell-setup]/returns: No hosts found to map to cell, exiting.

  The issue seems to be that it's running "nova-manage  cell_v2
  simple_cell_setup" as part of the nova database initialization when no
  compute nodes have been created but it returns 1 in that case [1].
  However, note that the previous steps (Cell0 mapping and schema
  migration) were successfully run.

  I think for nova bootstrap a reasonable orchestrated workflow would
  be:

  1. Create required databases (including the one for cell0).
  2. Nova db sync
  3. nova cell0 mapping and schema creation.
  4. Adding compute nodes
  5. mapping compute nodes (by running nova-manage cell_v2 discover_hosts)

  For step 3 we'd need to get simple_cell_setup to return 0 when not
  having compute nodes, or having a different command.

  With current behavior of nova-manage the only working workflow we can
  do is:

  1. Create required databases (including the one for cell0).
  2. Nova db sync
  3. Adding all compute nodes
  4. nova cell0 mapping and schema creation with "nova-manage cell_v2 simple_cell_setup".

  Am I right?, Is there any better alternative?

  
  [1] https://github.com/openstack/nova/blob/master/nova/cmd/manage.py#L1112-L1114

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