feat: disable kernel lockdown mode for azurelinux 3.0 aks image by default#7990
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The AzureLinux 3.0 kernel auto-enables lockdown when secure boot is detected via an OOT patch. Disable kernel lockdown by default to enable AKS customer installing their own custom GPU driver when using azurelinux 3.0. Signed-off-by: Mitch Zhu <mitchzhu@microsoft.com>
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Pull request overview
Disables the Azure Linux 3.0 kernel cmdline lockdown=integrity setting during VHD build, to prevent lockdown being forced on in scenarios where customers need to install custom GPU drivers.
Changes:
- Added a Mariner/Azure Linux helper function to remove the kernel
lockdowncmdline argument usinggrubby. - Invoked this helper during
pre-install-dependencies.shfor Azure Linux 3.0 builds.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
vhdbuilder/scripts/linux/mariner/tool_installs_mariner.sh |
Adds disableKernelLockdownCmdline() to remove lockdown args from the kernel cmdline. |
vhdbuilder/packer/pre-install-dependencies.sh |
Calls disableKernelLockdownCmdline for Mariner/Azure Linux when OS_VERSION is 3.0. |
miz060
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Apr 15, 2026
djsly
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What this PR does / why we need it:
Disable kernel lockdown by default to enable AKS customer installing their own custom GPU driver when using azurelinux 3.0. For trusted launch scenario, the AzureLinux 3.0 kernel auto-enables kernel lockdown mode when secure boot is detected via an OOT patch, so this won't introduce regression. Per PM discussion, we will follow up with:
Which issue(s) this PR fixes:
Fixes #
Validation: