kvm-test: add the option to "overwrite" an existing installation without recreating the disk from scratch #2093
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kvm-test has three new options (with only the third one being really new). * `--preserve-target` which is an explicit way to abort if the target image already exists (this is the default behavior) * `--recreate-target` which mimics what `-o` / `--overwrite` does (i.e., recreating the target image even if it already exists). * `--reuse-target` which is the new one. When the option is supplied, we will reuse the disk without recreating it (if it already exists). When using the --reuse-target option, the firmware will try to boot from the disk. To work around the issue, quickly hit ESC and select `Boot Manager -> UEFI QEMU DVD-ROM`. Signed-off-by: Olivier Gayot <[email protected]>
…arget Signed-off-by: Olivier Gayot <[email protected]>
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When running
kvm-testwith--install, we currently have two options related to the target disk:--overwriteoption (or-o) is passed, we instead recreate the target image from scratch.This makes us unable to supply an already partitioned disk to kvm-test, which is a bit of a shame considering the use-cases we have currently.
This change adds 3 new options (well, only one is truly new):
--preserve-targetwhich is an explicit way to abort if the target image already exists (this is the default behavior)--recreate-targetwhich mimics what-o/--overwritedoes.--reuse-targetwhich is the new one. When the option is supplied, we will reuse the disk without recreating it (if it already exists).When we install to an existing disk with
--reuse-target, we need to ask the firmware to boot from the installation media (or it will prefer booting from the disk if there is something installed to it). In BIOS mode, this means adding the-boot order=doption. However, in UEFI mode, it is more difficult to do. For now, I've added a note to stderr to tell how to proceed with UEFI (i.e., mashing ESC and then selectingBoot Manager->UEFI QEMU DVD-ROM). Suggestions welcome :)