From T358237#9591960 , we have a test VM contint1003.eqiad.wmnet to test Zuul with.
At first Paramiko does not recognize a private key that uses OPENSSH in the delimiter. It requires it to be the type of key (eg RSA):
-----BEGIN RSA PRIVATE KEY-----
I went to create a zuul-test account and added it as a Service User in Gerrit in order for it to receive the stream of events.
I went with some poor user systemd configuration as a first pass.