Error Retrieving Instance Status History After Update Policy Change

[ervcz]

Description

Encountered a 500 Internal Server Error when attempting to view the status history of a newly connected node in the Nebraska instance list whose update is paused by the update policy and is in Waiting.... status. The backend logs show the error: sql: Scan error on column index 2, name "version": converting NULL to string is unsupported.

Impact

Unable to view the status history of a newly connected node, which impairs the ability to monitor updates and debug potential issues.

Environment and steps to reproduce

1. Set-up:

   • Environment: Nebraska running locally on localhost:3000
   • Spin up flatcar nodes with qemu.

2. Task:

   • Try to update two nodes using Nebraska's update management feature. After the first update change the policy to 1/day do pause the update for the second one.

3. Action(s): a. Issue an update to one node.
   b. Changed the update policy to 1/day to prevent other nodes from updating.
   c. Connect a new node to Nebraska.
   d. Attempted to view the status history of the new node via the instance list in the Nebraska UI.

4. Error:

   • Frontend: HTTP 500 at http://localhost:3000/api/apps/e96281a6-d1af-4bde-9a0a-97b76e56dc57/groups/5b810680-e36a-4879-b98a-4f989e80b899/instances/f9bb8dd0b86141a1b11efd4c59a03db6/status_history
   • Backend logs include:

     sql: Scan error on column index 2, name "version": converting NULL to string is unsupported
     

Expected behavior

The status history of the newly connected node should display correctly, without generating a 500 Internal Server Error on the frontend or backend.

Relevant backend log excerpt

2025-01-15T16:54:40+02:00 ERR getInstanceStatusHistory - getting status history limit 0 error="sql: Scan error on column index 2, name \"version\": converting NULL to string is unsupported" appID=e96281a6-d1af-4bde-9a0a-97b76e56dc57 context=nebraska groupID=5b810680-e36a-4879-b98a-4f989e80b899 instanceID=f9bb8dd0b86141a1b11efd4c59a03db6
2025-01-15T16:54:43+02:00 ERR getInstanceStatusHistory - getting status history limit 0 error="sql: Scan error on column index 2, name \"version\": converting NULL to string is unsupported" appID=e96281a6-d1af-4bde-9a0a-97b76e56dc57 context=nebraska groupID=5b810680-e36a-4879-b98a-4f989e80b899 instanceID=f9bb8dd0b86141a1b11efd4c59a03db6
2025-01-15T16:55:09+02:00 ERR getInstanceStatusHistory - getting status history limit 0 error="sql: Scan error on column index 2, name \"version\": converting NULL to string is unsupported" appID=e96281a6-d1af-4bde-9a0a-97b76e56dc57 context=nebraska groupID=5b810680-e36a-4879-b98a-4f989e80b899 instanceID=f9bb8dd0b86141a1b11efd4c59a03db6
2025-01-15T16:55:10+02:00 ERR getInstanceStatusHistory - getting status history limit 0 error="sql: Scan error on column index 2, name \"version\": converting NULL to string is unsupported" appID=e96281a6-d1af-4bde-9a0a-97b76e56dc57 context=nebraska groupID=5b810680-e36a-4879-b98a-4f989e80b899 instanceID=f9bb8dd0b86141a1b11efd4c59a03db6