Installation fails because get-resources.sh does not honor the no_proxy settings in Red Hat OpenShift Container Platform 4.6/4.7 with Installer Provisioned Infrastructure

Issue

Installation fails because get-resources.sh does not honor the no_proxy settings in Red Hat OpenShift Container Platform 4.6/4.7 with Installer Provisioned Infrastructure

When looking at the logs of the metal3-(...) container with oc logs -l baremetal.openshift.io/cluster-baremetal-operator=metal3-state --all-containers, one can see:

61cd444c-ecdd-458a-b355-9415d93e0dc5_a9a7c74b-cd65-4d95-910c-ee1e9826a0a1_2021-05-21-13-08-55.tar.gz: May 21 09:06:40 worker-3 ironic-python-agent[2659]: 2021-05-21 09:06:40.203 2659 INFO ironic_python_agent.extensions.standby [-] Image /tmp/rhcos-47.83.202103251640-0-compressed.x86_64.qcow2 written to device /dev/sda in 1.641312599182129 seconds

But then right after that:

61cd444c-ecdd-458a-b355-9415d93e0dc5_a9a7c74b-cd65-4d95-910c-ee1e9826a0a1_2021-05-21-13-08-55.tar.gz: May 21 09:06:40 worker-3 ironic-python-agent[2659]: 2021-05-21 09:06:40.243 2659 DEBUG oslo_concurrency.processutils [-] Running cmd (subprocess): blkid -p -o value -s PTTYPE /dev/sda execute /usr/lib/python3.6/site-packages/oslo_concurrency/processutils.py:377
61cd444c-ecdd-458a-b355-9415d93e0dc5_a9a7c74b-cd65-4d95-910c-ee1e9826a0a1_2021-05-21-13-08-55.tar.gz: May 21 09:06:40 worker-3 ironic-python-agent[2659]: 2021-05-21 09:06:40.292 2659 DEBUG oslo_concurrency.processutils [-] CMD "blkid -p -o value -s PTTYPE /dev/sda" returned: 2 in 0.049s execute /usr/lib/python3.6/site-packages/oslo_concurrency/processutils.py:416
61cd444c-ecdd-458a-b355-9415d93e0dc5_a9a7c74b-cd65-4d95-910c-ee1e9826a0a1_2021-05-21-13-08-55.tar.gz: May 21 09:06:40 worker-3 ironic-python-agent[2659]: 2021-05-21 09:06:40.333 2659 DEBUG oslo_concurrency.processutils [-] 'blkid -p -o value -s PTTYPE /dev/sda' failed. Not Retrying. execute /usr/lib/python3.6/site-packages/oslo_concurrency/processutils.py:467
61cd444c-ecdd-458a-b355-9415d93e0dc5_a9a7c74b-cd65-4d95-910c-ee1e9826a0a1_2021-05-21-13-08-55.tar.gz: May 21 09:06:40 worker-3 ironic-python-agent[2659]: 2021-05-21 09:06:40.373 2659 ERROR ironic_lib.disk_utils [-] Failed to retrieve partition table type for disk /dev/sda for node None. Error: Unexpected error while running command.

Meaning that the image is copied to the worker's disk but that lsblk then does not report any partition table: Failed to retrieve partition table type for disk /dev/sda for node None. Error: Unexpected error while running command.