Comment 12 for bug 1915511

The source controller log shows this error:

11:06:42 ERROR juju.worker.migrationminion worker.go:197 validation failed: failed to open API to target controller: try again (try again)
2021-02-19 11:06:42 INFO juju.worker.migrationminion worker.go:139 migration phase is now: ABORT

One of the migrated machine or unit agents is trying to check that things went ok by first connecting to the target controller and the API connection could not be opened. Is there anything in the logs on the target side? ie controller or any of the machine/unit agent logs? What does show-model on the model which failed to migrate say?

We can also get the doc updated to add to the prerequisite checks that need to pass.