AMT undergoing DOS due to too many attempts to connect to AMT interface

[Darryl Weaver]

I have upgraded my Orange Box (cluster9) to the latest MAAS 1.7.0~beta7+bzr3266-0ubuntu1~trusty1.

However, now I am having significant problems with responsiveness of AMT on some nodes.

In the MAAS web UI, I am seeing red circles against the node indicating MAAS cannot communicate to AMT.
I am also seeing no response from AMT via the port 16992, stating no response before timeout.

If I check the network traffic going to the nodes AMT IP Address, there is a constant flow of traffic from the MAAS node, node0.

I think this is being caused by MAAS itself and the script /usr/bin/orange-box-amt-monitor generating too much traffic for the AMT interface to handle.

[Darryl Weaver (dweaver)]

We should disable orange-box-amt-monitor service.
And improve orange-box-status-all-nodes to warn about AMTs that need flushing.

[Darryl Weaver (dweaver)]

released in orange-box-1.86