During installation, terraform exits reporting Ironic returned 500:


level=debug msg=ironic_node_v1.openshift-master-host[0]: Still creating... [5m0s elapsed]
level=debug msg=ironic_node_v1.openshift-master-host[1]: Still creating... [5m0s elapsed]
level=debug msg=ironic_node_v1.openshift-master-host[1]: Still creating... [5m10s elapsed]
level=debug msg=ironic_node_v1.openshift-master-host[0]: Still creating... [5m10s elapsed]
level=debug msg=ironic_node_v1.openshift-master-host[2]: Still creating... [5m10s elapsed]
level=error
level=error msg=Error: Internal Server Error
level=error
level=error msg=  with ironic_node_v1.openshift-master-host[1],
level=error msg=  on main.tf line 13, in resource "ironic_node_v1" "openshift-master-host":
level=error msg=  13: resource "ironic_node_v1" "openshift-master-host" {
level=error
level=error
level=error msg=Error: Internal Server Error
level=error
level=error msg=  with ironic_node_v1.openshift-master-host[0],
level=error msg=  on main.tf line 13, in resource "ironic_node_v1" "openshift-master-host":
level=error msg=  13: resource "ironic_node_v1" "openshift-master-host" { 


Digging into the installer log bundle's Ironic logs, I do see errors like this:

ironic.common.exception.ServiceUnavailable: Cannot use 'none' RPC to connect to remote conductor 172.22.0.2
: ironic.common.exception.ServiceUnavailable: Cannot use 'none' RPC to connect to remote conductor 172.22.0.2
2022-04-01 15:53:47.486 1 INFO eventlet.wsgi.server [req-5f326ae0-e490-4751-a6e3-93aa088d8ac3 - - - - -] ::ffff:192.168.111.1 "POST /v1/nodes HTTP/1.1" status: 500  len: 476 time: 0.0718205
2022-04-01 15:53:47.490 1 ERROR ironic.api.method [req-fa9859dd-4f5c-4e18-8ce8-afe73948699a - - - - -] Server-side error: "Cannot use 'none' RPC to connect to remote conductor 172.22.0.2". Detail: 
Traceback (most recent call last):

  File "/usr/lib/python3.6/site-packages/ironic/api/method.py", line 42, in callfunction
    result = f(self, *args, **kwargs)

  File "/usr/lib/python3.6/site-packages/ironic/api/method.py", line 109, in inner_body
    return function(*args, **kwargs)

  File "/usr/lib/python3.6/site-packages/ironic/common/args.py", line 379, in inner_check_args
    return function(*args, **kwargs_next)

  File "/usr/lib/python3.6/site-packages/ironic/api/controllers/v1/node.py", line 2493, in post
    new_node, topic)

  File "/usr/lib/python3.6/site-packages/ironic/conductor/rpcapi.py", line 314, in create_node
    cctxt = self._prepare_call(topic=topic, version='1.36')

  File "/usr/lib/python3.6/site-packages/ironic/conductor/rpcapi.py", line 213, in _prepare_call
    % host)



Here's an example run: https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.11-e2e-metal-ipi-serial-ipv4/1509917381101621248


Looks like it's common enough to be worth investigating:
https://search.ci.openshift.org/?search=msg%3DError%3A+Internal+Server+Error&maxAge=48h&context=1&type=build-log&name=metal-ipi&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job