panic caught: assignment to entry in nil map

Scenario

Starting the Controller fails with:

. . .
I0421 10:56:45.271671   23232 migrations.go:35] Performing DB migrations
I0421 10:56:45.272956   23232 config.go:80] Importing persisted config
I0421 10:56:45.273341   23232 panic.go:884] Exiting import persisted config
E0421 10:56:45.273366   23232 panic_logger.go:15] panic caught: assignment to entry in nil map
E0421 10:56:45.273910   23232 panic_logger.go:16] goroutine 1 [running]:
runtime/debug.Stack()
	/usr/local/go/src/runtime/debug/stack.go:24 +0x65
veertu.com/veertu/ankaCloud/utils.OutputPanicAndExit()
. . .

Solution

You will have to re-create groups and attach them to the nodes in your Controller as this deletes the etcd data.
  1. Stop the Controller
  2. sudo rm -rf /Library/Application\ Support/Veertu/Anka/anka-controller/member
  3. Start the Controller

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