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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Also affects: nova/pike
   Importance: Undecided
       Status: New

** Changed in: nova/pike
     Assignee: (unassigned) => Ebbex (eb4x)

** Changed in: nova/pike
       Status: New => In Progress

** Changed in: nova/pike
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1715463

Title:
  binary/name gets confused under upgrades of osapi_compute and metadata
  when using wsgi files

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) pike series:
  In Progress

Bug description:
  Before an upgrade, we have these type of entries in the db.

  MariaDB [nova]> SELECT id, host, `binary`, deleted, version FROM services;
  +----+--------------+--------------------+---------+---------+
  | id | host         | binary             | deleted | version |
  +----+--------------+--------------------+---------+---------+
  |  5 | r1-n-os-api  | nova-osapi_compute | 0       |      16 |
  | 21 | r1-n-m-api   | nova-metadata      | 0       |      16 |

  The wsgi files we run basically boil down to something like

    NAME=metadata
    return wsgi_app.init_application(NAME)

  In the wsgi_app.py we see this function

    service_ref = objects.Service.get_by_host_and_binary(ctxt, host,
  name)

  Which results in a really big query, which again comes down to

    SELECT host, `binary` FROM services
      WHERE host = 'r1-n-m-api' AND `binary` == 'metadata'

  No results. service_ref is set to None. Carry on.

    if service_ref:
      #Nope.
    else:
      try:
        ...
        service_obj.host = host
        service_obj.binary = 'nova-%s' % name
        service_obj.create()

  Which results in a INSERT statement something like this;

    INSERT INTO services(host, `binary`, report_count, disabled, deleted, version)
      VALUES ('r1-n-m-api', 'nova-metadata', 0, 0, 0, 22)

    ERROR 1062 (23000): Duplicate entry 'r1-n-m-api-nova-metadata-0' for
  key 'uniq_services0host0binary0deleted'

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