Unattended Client Install

Trying to do unattended client installs on an EC2 instance.

I believe it’s possible with chef 12 to add a node to the chef server,
using knife, but only requiring the validator key. However, when I try and
run ‘knife node from file’ I’m being told that the client.pem key can’t be
found. If I’m using only the validator key, then a client key for a user
should not be required.

If not, would appreciate some pointers to specific instructions on
unattended client installs with Chef 12.