add RHEL variant to IsEL() check

Author: djoshy

pkg/daemon/osrelease/osrelease.go

@@ -91,8 +91,11 @@ func (os OperatingSystem) BaseVersionMajor() string {
 
 // IsEL is true if the OS is an Enterprise Linux variant of CoreOS
 // i.e. RHEL CoreOS (RHCOS) or CentOS Stream CoreOS (SCOS)
+// As of https://github.com/openshift/installer/pull/9392, the
+// openshift installer uses RHEL base images, so rhel is now
+// considered a valid "Enterprise Linux" variant.
 func (os OperatingSystem) IsEL() bool {
-	return os.id == rhcos || os.id == scos
+	return os.id == rhcos || os.id == scos || os.id == rhel
 }
 
 // IsEL8 is true if the OS is RHCOS 8 or SCOS 8