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[Masahito Muroi <2106085@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

The Lock Server API raises 500 InternalServer error with
oslo_db.exception.DBReferenceError if the lock API is called just after
create server API returns its response.

ERROR response:

{"computeFault": {"code": 500, "message": "Unexpected API Error. Please
report this at http://bugs.launchpad.net/nova/ and attach the Nova API
log if possible.\n<class 'oslo_db.exception.DBReferenceError'>"}}


ERROR reason:

The server lock API makes instance action record in the beginning of its
operation. The instance action record has foreign key to cell's instance
id column, so if the lock API is called before instance information is
not created in the cell db, the lock API returns 500 internal error.

How to reproduce:


Run the following 2 line script.

instance_id=$(curl -X POST https://nova-
endpoint.example.com/v2.1/servers -H "Accept: application/json" -H
"Content-Type: application/json" -H "OpenStack-API-Version: compute
2.96" -H "User-Agent: python-novaclient" -H "X-Auth-Token: ${OS_TOKEN}"
-H "X-OpenStack-Nova-API-Version: 2.96" -d '{"server": {"name": "lock-
api-failure", "imageRef": "bc638e70-fcc2-416a-84e4-9acd18cc07e6",
"flavorRef": "1", "min_count": 1, "max_count": 1, "networks": [{"uuid":
"d45b8c45-8977-4820-9df0-e09134197be6"}]}}' | jq '.server.id' -r)

curl -X POST https://nova-
endpoint.example.com/v2.1/servers/${instance_id}/action -H "Accept:
application/json" -H "Content-Type: application/json" -H "OpenStack-API-
Version: compute 2.96" -H "User-Agent: python-novaclient" -H "X-Auth-
Token: ${OS_TOKEN}" -H "X-OpenStack-Nova-API-Version: 2.96" -d '{"lock":
null}'

** Affects: nova
     Importance: Undecided
     Assignee: Masahito Muroi (muroi-masahito)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Masahito Muroi (muroi-masahito)

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https://bugs.launchpad.net/bugs/2106085

Title:
  Lock action API return 500 error if no instance information

Status in OpenStack Compute (nova):
  New

Bug description:
  The Lock Server API raises 500 InternalServer error with
  oslo_db.exception.DBReferenceError if the lock API is called just
  after create server API returns its response.

  ERROR response:

  {"computeFault": {"code": 500, "message": "Unexpected API Error.
  Please report this at http://bugs.launchpad.net/nova/ and attach the
  Nova API log if possible.\n<class
  'oslo_db.exception.DBReferenceError'>"}}

  
  ERROR reason:

  The server lock API makes instance action record in the beginning of
  its operation. The instance action record has foreign key to cell's
  instance id column, so if the lock API is called before instance
  information is not created in the cell db, the lock API returns 500
  internal error.

  How to reproduce:

  
  Run the following 2 line script.

  instance_id=$(curl -X POST https://nova-
  endpoint.example.com/v2.1/servers -H "Accept: application/json" -H
  "Content-Type: application/json" -H "OpenStack-API-Version: compute
  2.96" -H "User-Agent: python-novaclient" -H "X-Auth-Token:
  ${OS_TOKEN}" -H "X-OpenStack-Nova-API-Version: 2.96" -d '{"server":
  {"name": "lock-api-failure", "imageRef":
  "bc638e70-fcc2-416a-84e4-9acd18cc07e6", "flavorRef": "1", "min_count":
  1, "max_count": 1, "networks": [{"uuid":
  "d45b8c45-8977-4820-9df0-e09134197be6"}]}}' | jq '.server.id' -r)

  curl -X POST https://nova-
  endpoint.example.com/v2.1/servers/${instance_id}/action -H "Accept:
  application/json" -H "Content-Type: application/json" -H "OpenStack-
  API-Version: compute 2.96" -H "User-Agent: python-novaclient" -H
  "X-Auth-Token: ${OS_TOKEN}" -H "X-OpenStack-Nova-API-Version: 2.96" -d
  '{"lock": null}'

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