Changing cluster details out of sync with interface address loses cluster data

[Christian Reis]

Steps to reproduce:

- ifconfig interface
- Configure cluster
- Verify that DHCP is running
- ifconfig interface to another IP
- Configure cluster interface to that IP
- Save
  (at this point you are notified in your log)
- Configure cluster interface

You'll have a form with empty values for that interface.

The log at the time of the Save:

Oct 17 00:26:06 ubuntu kernel: [14284.104419] init: maas-dhcpd main process (8576) killed by TERM signal
Oct 17 00:26:07 ubuntu dhcpd: lease 10.155.31.100: no subnet.
Oct 17 00:26:07 ubuntu dhcpd: lease 10.155.31.101: no subnet.
Oct 17 00:26:07 ubuntu dhcpd: Wrote 0 class decls to leases file.
Oct 17 00:26:07 ubuntu dhcpd: Wrote 0 leases to leases file.
Oct 17 00:26:07 ubuntu maas: [WARNING] Failed to create Network when adding/editing cluster interface maas-em1 with error [{'name': [u'Network with this Name already exists.']}]. This is OK if it already exists.

[Julian Edwards (julian-edwards)]

Looks like it overlaps with the pserv's interface registration.

[Jeroen T. Vermeulen (jtv)]

I'm not seeing this, on a pre-existing install. I agree with Julian: it looks like maybe this happened just while the cluster was discovering and registering its network interfaces.

[Andres Rodriguez (andreserl)]

Hi!

We believe this is no longer an issue in the latest MAAS releases. As such, we are marking this bug report as invalid. If you believe this is still an issue, please re-open this back report.

Thanks