Needs further review to determine how to move forward.

Verified failed on 4.10.0-0.nightly-2021-10-19-150011 which include the fix.

1. Prepare install-config.yaml file and set wrong network name
2. Run openshift-installer create cluster
3. Expected error in PR is not present instead openshift-installer exit when running terraform vsphereerror is reported in terraform vsphere provider as below:

time="2021-10-20T10:16:49Z" level=error msg="Error: error fetching network: network 'VM Network 1' not found"

Checked with Aditya, issue will be fixed in new PR #5317, so move bug back to ASSIGNED to get new PR merged.

Verified failed on registry.ci.openshift.org/ocp/release:4.10.0-0.nightly-2021-10-27-230233.

It works on IPI, but block UPI installation with below error due to not set network option in install-config.yaml, since network option is not required on UPI per official doc[1] and upstream doc [2].

10-28 13:31:11.013  [INFO] Generating manifests files.....
10-28 13:31:12.910  level=fatal msg=failed to fetch Master Machines: failed to load asset "Install Config": platform.vsphere.network: Invalid value: "": unable to find network provided

install-config.yaml file for UPI is:

install-config.yaml:
  ---
  apiVersion: v1
  controlPlane:
    architecture: amd64
    hyperthreading: Enabled
    name: master
    replicas: 3
  compute:
  - architecture: amd64
    hyperthreading: Enabled
    name: worker
    replicas: 0
  metadata:
    name: miyadav-vs28
  platform:
    vsphere:
      vCenter: vcenter.sddc-xx-xx-xx-xx.vmwarevmc.com
      username: xxxx.ci.openshift.org
      password: HIDDEN
      datacenter: SDDC-Datacenter
      defaultDatastore: WorkloadDatastore
  pullSecret: HIDDEN
  networking:
    clusterNetwork:
    - cidr: 10.128.0.0/14
      hostPrefix: 23
    serviceNetwork:
    - 172.30.0.0/16
    networkType: OpenShiftSDN
  publish: External
  baseDomain: qe.devcluster.openshift.com
  sshKey: xxxxx

[1] https://docs.openshift.com/container-platform/4.9/installing/installing_vsphere/installing-vsphere.html
[2] https://github.com/openshift/installer/blob/master/upi/vsphere/README.md

Verified on 4.10.0-0.nightly-2021-11-14-184249 and passed

1. UPI installation is finished without error
2. set invalid network in install-config.yaml file, and run "./openshift-install create manifests --dir ipi", got the expected error.
$ ./openshift-install create manifests --dir ipi
FATAL failed to fetch Master Machines: failed to load asset "Install Config": platform.vsphere.network: Invalid value: "qe-segment1": unable to find network provided

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: OpenShift Container Platform 4.10.3 security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2022:0056