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Update kernel docs for 4.3+

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Signed-off-by: Jonathon Anderson <janderson@ciq.co>
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Jonathon Anderson
2023-06-23 00:36:55 -05:00
committed by Jonathon Anderson
parent 0df628dcc7
commit 2500afb5f7
1 changed files with 16 additions and 14 deletions
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userdocs/contents/kernel.rst
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@@ -6,8 +6,8 @@ Node Kernels
============ ============
Warewulf nodes require a Linux kernel to boot. There are multiple ways Warewulf nodes require a Linux kernel to boot. There are multiple ways
to do this, but the default, and easiest way is to install the kernel to do this, but the default and easiest way is to install the kernel
you wish to use for a particular container, into the container. you wish to use for a particular container into the container.
Warewulf will locate the kernel automatically within the container and Warewulf will locate the kernel automatically within the container and
by default use that kernel for any node configured to use that by default use that kernel for any node configured to use that
@@ -19,15 +19,14 @@ You can see what kernel is included in a container by using the
.. code-block:: console .. code-block:: console
# wwctl container list # wwctl container list
CONTAINER NAME NODES KERNEL VERSION CONTAINER NAME NODES KERNEL VERSION CREATION TIME MODIFICATION TIME SIZE
alpine 0 alpine 0 05 Jun 23 20:02 MDT 05 Jun 23 20:02 MDT 17.9 MiB
rocky 0 4.18.0-348.12.2.el8_5.x86_64 rocky-8 1 4.18.0-372.13.1.el8_6.x86_64 17 Jan 23 23:48 MST 06 Apr 23 09:40 MDT 2.4 GiB
rocky_updated 1 4.18.0-348.23.1.el8_5.x86_64
Here you will notice the alpine contianer that was imported has no Here you will notice the alpine contianer that was imported has no
kernel within it, and each of the rocky containers include a kernel. kernel within it, and the rocky container includes a kernel.
This model was introduced in Warewulf 4.3.0. Previously, Warewulf This model was introduced in Warewulf v4.3. Previously, Warewulf
managed the kernel and the container separately, which made it hard to managed the kernel and the container separately, which made it hard to
build and distribute containers that have custom drivers and/or build and distribute containers that have custom drivers and/or
configurations included (e.g. OFED, GPUs, etc.). configurations included (e.g. OFED, GPUs, etc.).
@@ -35,12 +34,11 @@ configurations included (e.g. OFED, GPUs, etc.).
Kernel Overrides Kernel Overrides
================ ================
It is still possible to specify a kernel to a container if it doesn't It is still possible to specify a kernel for a container if it doesn't
include it's own kernel, or if you wish to override the default kernel include it's own kernel, or if you wish to override the default kernel
by using the ``kernel override`` capability. by using the ``kernel override`` capability.
You can specify this option either within the ``nodes.conf`` directly You can specify this option with the ``--kerneloverride`` option to
or via the command line with the ``--kerneloverride`` option to
``wwctl node set`` or ``wwctl profile set`` commands. ``wwctl node set`` or ``wwctl profile set`` commands.
In this case you will also need to import a kernel specifically into In this case you will also need to import a kernel specifically into
@@ -53,7 +51,7 @@ follows:
4.18.0-305.3.1.el8_4.x86_64: Done 4.18.0-305.3.1.el8_4.x86_64: Done
This process will import not only the kernel image itself, but also This process will import not only the kernel image itself, but also
all of the kernel modules and firmware associated to this kernel. all of the kernel modules and firmware associated with this kernel.
Listing All Imported Kernels Listing All Imported Kernels
---------------------------- ----------------------------
@@ -67,5 +65,9 @@ following command:
VNFS NAME NODES VNFS NAME NODES
4.18.0-305.3.1.el8_4.x86_64 0 4.18.0-305.3.1.el8_4.x86_64 0
Once a kernel has been imported and showing up in this list you can # wwctl kernel list
configure it to boot compute nodes. KERNEL NAME KERNEL VERSION NODES
4.18.0-305.3.1.el8_4.x86_64 0
Once a kernel has been imported you can configure it to boot compute
nodes.