After 7.x to 8.x upgrade receiving experiencing turbulence in web ui

[cweibel]

General FYI for those migrating from 7.x to 8.x, if you have pipeline definitions with older  {{ var }} style variables, the exhibited behavior post upgrade is:

• The web frontend displays experiencing turbulence for the team you are logged into, likely main
• fly CLI works 100% fine, can login, get-pipeline, trigger-job, etc…
• Logging in with a local user to a team that does not have a pipeline with a {{ var }} variable will work as expected

The quick solution is to drop any pipelines with the older variable type (or move them to a different team via an UPDATE statement in the db).

I know the release notes mentions that these types of variable has been deprecated but I had only expected the associated pipeline to be broken, not the whole web ui front end. The deprecation is also mentioned in https://github.com/orgs/concourse/discussions/9184 but doesn't reference the symptoms of not having done this.

Wanted to leave this nugget behind for anyone else who runs into this problem. Could not find any logs that indicated this was the problem.

[taylorsilva]

Thanks for sharing! I am surprised this failure state occurs as well. I'd expect the old var style to be treated as a string and not cause any errors. I'm glad nothing else broke and you were able to update your pipelines.