How to Select Default Boot Kernel on a Linux VM Guest Without Booting the VM Guest
Last updated on FEBRUARY 23, 2018
Applies to:Oracle VM - Version 3.0.1 and later
The document describe how to setup default boot kernel for a Linux VM guest without booting the VM guest.
The illustration below is tangible only when:
1. The /boot file system of the target VM guest is built on partition directly.
2. The file system type of /boot partition of the target VM guest is known by dom0, e.g. ext2/3/4, ocfs2.
The point is using kpartx to create device maps of the boot disk of VM guest on dom0, then mount the device-mapper device of /boot partition r/w.
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