preupgrade script reports "If it is a system partition then in-place upgrade is not possible."
Issue
- In the process of upgrading our systems to RHEL7, following the useful instructions from solution article number 637583.
We use encrypted root partitions. Thepreupgtoo reports these as "If it is a system partition then in-place upgrade is not possible."
Running redhat-upgrade-tool --force then creates a new /boot/grub/grub.conf entry "System Upgrade." As kernel parameters it copies the previous ones, "rd_LUKS_UUID=luks-09040e1f...", which indeed don't work.
However, when changing the parameter name from "rd_LUKS_UUID" to "rd.luks.uuid", I can boot from the system upgrade kernel/ramdisk, and the upgrade scripts seem to run fine!
Therefore, it appears that it is actually easily possibly to do an in-place upgrade, contrary to what preupg is saying. Or, is this a bit good to be true? What other issues might appear when doing the upgrade with a LUKS-encrypted root volume?
Environment
- Red Hat Enterprise Linux (RHEL) 7.0
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