Disable subscription-manager container mode detection during registration

Remove the /etc/rhsm-host symlink before calling subscription-manager
register so that it does not detect container mode and exit with
status 78. subscription-manager checks for /etc/rhsm-host (a symlink
to ../run/secrets/rhsm) to determine if it is running inside a
container.

Author: steveb

bootc/rhsm.sh

@@ -13,6 +13,14 @@ RHSM_REPOS=${RHSM_REPOS:-"--enable=rhoso-18.0-for-rhel-${RHEL_MAJOR}-x86_64-rpms
 RHSM_POOL=""
 
 rm -f /etc/yum.repos.d/*.repo
+# Disable subscription-manager container detection so that registration
+# works during container builds. subscription-manager checks for
+# /etc/rhsm-host (a symlink to ../run/secrets/rhsm) to detect
+# container mode.
+if [ -L /etc/rhsm-host ]; then
+    rm -f /etc/rhsm-host
+fi
+
 # Suppress xtrace to avoid leaking credentials to the build log
 set +x
 subscription-manager register --username="$RHSM_USER" --password="$RHSM_PASSWORD"