Leapp: Red Hat tool to upgrade from RHEL7 to RHEL8
summary
Leapp performs a live in-place upgrade from RHEL7 to RHEL8 by running extensive prechecks, downloading all packages into a preserved dnf cache, building a minimal RHEL8 rootfs and running the RHEL7 dnf inside an overlay/container to validate the full transaction, then creating a 4.18 initramfs, adding a grubby boot entry and performing the offline package swap with SELinux set permissive for relabeling. It supports RHSM and custom repos (EPEL shown), reports inhibitors (LUKS, deprecated drivers, ssh settings), and provides debug/stress modes; demo upgrade completes successfully.
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chapters (8)
- 0:00Introduction
- 0:40What is Leapp
- 5:14How it works
- 15:34Target transaction
- 20:02Interim preparation
- 23:45Real upgrade
- 30:39Debugging
- 32:17Example
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