fix base domain issue (openshift#71092)

Author: jianli-wei

ci-operator/config/openshift/verification-tests/openshift-verification-tests-main__installer-rehearse-4.20.yaml

@@ -95,10 +95,8 @@ tests:
     allow_skip_on_success: true
     cluster_profile: gcp-qe
     env:
-      COMPUTE_SERVICE_ACCOUNT: [email protected]
-      CONTROL_PLANE_SERVICE_ACCOUNT: [email protected]
-      GCP_CCO_MANUAL_USE_MINIMAL_PERMISSIONS: "yes"
-    workflow: cucushift-installer-rehearse-gcp-ipi-xpn-cco-manual-users-static
+      PRIVATE_ZONE_PROJECT: openshift-qe-regional
+    workflow: cucushift-installer-rehearse-gcp-ipi-xpn-minimal-permission-byo-hosted-zone-private
 - as: installer-rehearse-ibmcloud-dis
   cron: '@yearly'
   steps:

ci-operator/step-registry/gcp/provision/private-dns-zone/gcp-provision-private-dns-zone-commands.sh

@@ -23,9 +23,11 @@ fi
 
 CLUSTER_NAME="${NAMESPACE}-${UNIQUE_HASH}"
 
-GCP_BASE_DOMAIN="$(< ${CLUSTER_PROFILE_DIR}/public_hosted_zone)"
-if [[ -n "${BASE_DOMAIN}" ]]; then
-  GCP_BASE_DOMAIN="${BASE_DOMAIN}"
+CONFIG="${SHARED_DIR}/install-config.yaml"
+GCP_BASE_DOMAIN=$(yq-go r "${CONFIG}" baseDomain)
+if [[ "${GCP_BASE_DOMAIN}" == "" ]]; then
+  echo "ERROR: can not read \"baseDomain\" from install-config.yaml, please check."
+  exit 1
 fi
 
 CLUSTER_PVTZ_PROJECT="${GCP_PROJECT}"

ci-operator/step-registry/gcp/provision/private-dns-zone/gcp-provision-private-dns-zone-ref.yaml

@@ -19,9 +19,6 @@ ref:
     default: "yes"
     documentation: |-
       Whether to pre-create the DNS private zone in the interested project.
-  - name: BASE_DOMAIN
-    default: ""
-    documentation: |-
-      The base domain.
   documentation: |-
-    The step generates private DNS zone settings. 
+    The step reads baseDomain from '${SHARED_DIR}/install-config.yaml', 
+    and generates private DNS zone settings.