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
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
------------------