We have looker version 5 working happily on-premise in AWS.
We followed the instructions here to upgrade to 6:
(our setup is an ELB with looker instances behind it using EFS as the shared drive, and RDS as the DB)
When the servers came up, the lookml project was gone. I don’t see anything in the looker logs that indicate anything went wrong.
We plan on rolling back (ie putting looker 5 back, and restoring the RDS DB)
Any ideas how we can diagnose what went wrong?