Ignore Faulty nodes while deployment

[kashp]

How can we ignore fault nodes of the list and continue deployment on working nodes.

connecting to clients failed: connecting to remote host failed: Connect("ABC@abc.com:22"): dial tcp X.X.X.X:22: connect: no route to host

sup fails even if there is a single faulty node.

[VojtechVitek]

There's some discussion at #152