Merge pull request #28 from pajamian/main

Katello Notes

README.md

@@ -21,6 +21,16 @@ Running this script will convert an existing CentOS 8 system to Rocky Linux 8.
 
 ### Known Issues
 
+#### Katello clashes
+
+Katello installs its own repositories via subscription-manager that are meant to
+replace the ones from CentOS, but it does not remove, or even disable, the
+corresponding CentOS repositories.  This would cause issues to a normal running
+system, but it is especially problematic for migrate2rocky as it means that
+migrate2rocky cannot properly determine which repositories to remove and
+attempting to run migrate2rocky on a katello will likely result in a corrupted
+system.
+
 #### RHEL migrations show error messages during conversion
 
 ```

migrate2rocky.sh

@@ -103,6 +103,12 @@ pkg_ver() (
     return 0
 )
 
+pre_check () {
+    if [[ -e /etc/rhsm/ca/katello-server-ca.pem ]]; then
+	exit_message "Migration from Katello-modified systems is not supported by migrate2rocky."
+    fi
+}
+
 # All of the binaries used by this script are available in a EL8 minimal install
 # and are in /bin, so we should not encounter a system where the script doesn't
 # work unless it's severly broken.  This is just a simple check that will cause
@@ -673,6 +679,7 @@ if (( ! noopts )); then
     usage
 fi
 
+pre_check
 efi_check
 bin_check