BMC enlistment - When adding a machine with only IPMI credentials, these get overwritten by MAAS ones

[Andres Rodriguez]

When adding a machine with BMC credentials provided for BMC enlistment, these get overwritten when MAAS runs the commissioning ones.

Since the user is manually providing these, then MAAS shouldn't need to override them. MAAS should disable overriding MAAS resetting/creating BMC credentials.

[Lee Trager (ltrager)]

Enlistment matches a machine with an existing node when the MAC address is missing or incorrect is via the BMC IP address. Enlistment gets the BMC IP address when it sets the BMC credentials. While we could modify maas-ipmi-autodetect to only return the BMC IP address if the machine is being commissioned and the user wants the maas BMC user to be created we have no way to tell enlistment to do that. The way we made the maas BMC user conditional for commissioning is by using a template which is generated on the region.

[Jerzy Husakowski (jhusakowski)]

MAAS adds its own BMC credentials to the machines it manages, it does not overwrite the ones provided by the user during enlistment. You can remove that user from the BMC if you no longer want MAAS to have access.