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OSDOCS-7177: add intel vroc raid procedure

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Jesse Dohmann
2024-06-20 11:58:56 -07:00
committed by openshift-cherrypick-robot
parent b3b96beca8
commit b6c4ebebdd
2 changed files with 80 additions and 0 deletions
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1
installing/install_config/installing-customizing.adoc
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@@ -45,6 +45,7 @@ endif::openshift-webscale[]
include::modules/installation-special-config-kmod.adoc[leveloffset=+1]
include::modules/installation-special-config-storage.adoc[leveloffset=+1]
include::modules/installation-special-config-raid.adoc[leveloffset=+1]
include::modules/installation-special-config-raid-intel-vroc.adoc[leveloffset=+1]
include::modules/installation-special-config-chrony.adoc[leveloffset=+1]
[role="_additional-resources"]

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modules/installation-special-config-raid-intel-vroc.adoc Normal file
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// Module included in the following assemblies:
//
// * installing/install_config/installing-customizing.adoc
:_mod-docs-content-type: PROCEDURE
[id="installation-special-config-raid-intel-vroc_{context}"]
== Configuring an Intel(R) Virtual RAID on CPU (VROC) data volume
Intel(R) VROC is a type of hybrid RAID, where some of the maintenance is offloaded to the hardware, but appears as software RAID to the operating system.
The following procedure configures an Intel(R) VROC-enabled RAID1.
.Prerequisites
* You have a system with Intel(R) Volume Management Device (VMD) enabled.
.Procedure
. Create the Intel(R) Matrix Storage Manager (IMSM) RAID container by running the following command:
+
[source,terminal]
----
$ mdadm -CR /dev/md/imsm0 -e \
imsm -n2 /dev/nvme0n1 /dev/nvme1n1 <1>
----
<1> The RAID device names. In this example, there are two devices listed. If you provide more than two device names, you must adjust the `-n` flag. For example, listing three devices would use the flag `-n3`.
. Create the RAID1 storage inside the container:
.. Create a dummy RAID0 volume in front of the real RAID1 volume by running the following command:
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[source,terminal]
----
$ mdadm -CR /dev/md/dummy -l0 -n2 /dev/imsm0 -z10m --assume-clean
----
.. Create the real RAID1 array by running the following command:
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[source,terminal]
----
$ mdadm -CR /dev/md/coreos -l1 -n2 /dev/imsm0
----
.. Stop both RAID0 and RAID1 member arrays and delete the dummy RAID0 array with the following commands:
+
[source,terminal]
----
$ mdadm -S /dev/md/dummy \
mdadm -S /dev/md/coreos \
mdadm --kill-subarray=0 /dev/md/imsm0
----
.. Restart the RAID1 arrays by running the following command:
+
[source,terminal]
----
$ mdadm -A /dev/md/coreos /dev/md/imsm0
----
. Install {op-system} on the RAID1 device:
.. Get the UUID of the IMSM container by running the following command:
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[source,terminal]
----
$ mdadm --details --export /dev/md/imsm0
----
.. Install {op-system} and include the `rd.md.uuid` kernel argument by running the following command:
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[source,terminal]
----
$ coreos-installer install /dev/md/coreos \
--append-karg rd.md.uuid=<md_UUID> <1>
...
----
<1> The UUID of the IMSM container.
+
Include any additional `coreos-installer` arguments you need to install {op-system}.