openstack/ironic
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[doc] Bootloader reinstallations on Software RAID

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Add a section to the docs how to handle grub reinstallations
with Ironic software RAID on BIOS nodes, e.g. during disk
replacements.

Change-Id: I2c1d1a61a3340f6785ab6f63cb96f2c045f8eabe
This commit is contained in:
Arne Wiebalck 2021-07-02 16:58:10 +02:00
parent 7c8ddbf747
commit bb0523f038
1 changed files with 9 additions and 0 deletions
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9
doc/source/admin/raid.rst
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@ -408,6 +408,15 @@ There are certain limitations to be aware of:
are installed or the bootloader is updated, so measures to keep these are installed or the bootloader is updated, so measures to keep these
partitions in sync need to be taken. partitions in sync need to be taken.
* In BIOS mode, the Ironic Python Agent installs the boot loader onto all
disks. While nothing is required for kernel or grub package updates,
re-installing the bootloader on one disk, e.g. during a disk replacement,
may require to re-install the bootloader on all disks. Otherwise, there
is a risk of an incompatibility of the grub components stored on the device
(i.e. stage1/boot.img in the MBR and stage1.5/core.img in the MBR gap) with
the ones stored in /boot (stage2). This incompatibility can render the node
unbootable if the wrong disk is selected for booting.
Image requirements Image requirements
------------------ ------------------