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fix: validate cache-only Ubuntu GPU images and preserve prerequisites #9693

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Ganeshkumar Ashokavardhanan (ganeshkumarashok) wants to merge 4 commits into
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fix: validate cache-only Ubuntu GPU images and preserve prerequisites #9693

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25ecafe
fix(gpu): keep shared Ubuntu VHDs cache-only
ganeshkumarashok Oct 2, 2026
cc9b90f
fix: distinguish stock backlight modules from GPU driver residue
ganeshkumarashok Oct 2, 2026
5c77850
Merge main after shared Ubuntu prebake removal
ganeshkumarashok Oct 2, 2026
387b780
fix: make GPU helper production roots explicit
ganeshkumarashok Oct 3, 2026
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12 changes: 4 additions & 8 deletions .pipelines/.vsts-vhd-builder-release.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -629,10 +629,8 @@ stages:
echo '##vso[task.setvariable variable=IMG_VERSION]latest'
echo '##vso[task.setvariable variable=HYPERV_GENERATION]V2'
echo '##vso[task.setvariable variable=AZURE_VM_SIZE]Standard_D16ds_v5'
# NVIDIA_CUDA_PREBAKE bakes the CUDA driver kernel module into this shared x86 gen2 image so GPU
# nodes can later skip the ~80-150s in-CSE DKMS compile via the configGPUDrivers skip-build path
# (PR #8787); non-GPU and --gpu-driver None nodes tear the module down during provisioning.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]NVIDIA_CUDA_PREBAKE'
# Cache the GPU installer without registering NVIDIA on this shared image.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]None'
echo '##vso[task.setvariable variable=ARCHITECTURE]X86_64'
echo '##vso[task.setvariable variable=ENABLE_FIPS]False'
echo '##vso[task.setvariable variable=ENABLE_TRUSTED_LAUNCH]False'
Expand Down Expand Up @@ -707,10 +705,8 @@ stages:
echo '##vso[task.setvariable variable=IMG_VERSION]latest'
echo '##vso[task.setvariable variable=HYPERV_GENERATION]V2'
echo '##vso[task.setvariable variable=AZURE_VM_SIZE]Standard_D16ds_v5'
# NVIDIA_CUDA_PREBAKE bakes the CUDA driver kernel module into this shared x86 gen2 image so GPU
# nodes can later skip the ~80-150s in-CSE DKMS compile via the configGPUDrivers skip-build path
# (PR #8787); non-GPU and --gpu-driver None nodes tear the module down during provisioning.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]NVIDIA_CUDA_PREBAKE'
# Cache the GPU installer without registering NVIDIA on this shared image.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]None'
echo '##vso[task.setvariable variable=ARCHITECTURE]X86_64'
echo '##vso[task.setvariable variable=ENABLE_FIPS]False'
echo '##vso[task.setvariable variable=ENABLE_TRUSTED_LAUNCH]False'
Expand Down
12 changes: 4 additions & 8 deletions .pipelines/.vsts-vhd-builder.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -86,10 +86,8 @@ stages:
echo '##vso[task.setvariable variable=IMG_VERSION]latest'
echo '##vso[task.setvariable variable=HYPERV_GENERATION]V2'
echo '##vso[task.setvariable variable=AZURE_VM_SIZE]Standard_D16ds_v5'
# NVIDIA_CUDA_PREBAKE bakes the CUDA driver kernel module into this shared x86 gen2 image so GPU
# nodes can later skip the ~80-150s in-CSE DKMS compile via the configGPUDrivers skip-build path
# (PR #8787); non-GPU and --gpu-driver None nodes tear the module down during provisioning.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]NVIDIA_CUDA_PREBAKE'
# Cache the GPU installer without registering NVIDIA on this shared image.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]None'
echo '##vso[task.setvariable variable=ARCHITECTURE]X86_64'
echo '##vso[task.setvariable variable=ENABLE_FIPS]false'
echo '##vso[task.setvariable variable=ENABLE_TRUSTED_LAUNCH]False'
Expand Down Expand Up @@ -133,10 +131,8 @@ stages:
echo '##vso[task.setvariable variable=IMG_VERSION]latest'
echo '##vso[task.setvariable variable=HYPERV_GENERATION]V2'
echo '##vso[task.setvariable variable=AZURE_VM_SIZE]Standard_D16ds_v5'
# NVIDIA_CUDA_PREBAKE bakes the CUDA driver kernel module into this shared x86 gen2 image so GPU
# nodes can later skip the ~80-150s in-CSE DKMS compile via the configGPUDrivers skip-build path
# (PR #8787); non-GPU and --gpu-driver None nodes tear the module down during provisioning.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]NVIDIA_CUDA_PREBAKE'
# Cache the GPU installer without registering NVIDIA on this shared image.
echo '##vso[task.setvariable variable=FEATURE_FLAGS]None'
echo '##vso[task.setvariable variable=ARCHITECTURE]X86_64'
echo '##vso[task.setvariable variable=ENABLE_FIPS]False'
echo '##vso[task.setvariable variable=ENABLE_TRUSTED_LAUNCH]False'
Expand Down
9 changes: 9 additions & 0 deletions parts/linux/cloud-init/artifacts/ubuntu/cse_install_ubuntu.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,15 @@ installUbuntu2604MinimalBuildDeps() {
aptGetBatchInstallPackagesWithFallback "${pkg_list[@]}"
}

# Shared by VHD production and content validation; independent of the prebake feature flag.
isUbuntuGPUCacheOnlyImage() {
local version="$1" arch="$2" sku="$3" fips="$4"
case "${version}:${arch}:${sku}:${fips,,}" in
22.04:amd64:22_04-lts-gen2:false|24.04:amd64:server:false) return 0 ;;
*) return 1 ;;
esac
}

installDeps() {
wait_for_apt_locks
retrycmd_silent 120 5 25 curl -fsSL https://packages.microsoft.com/config/ubuntu/${UBUNTU_RELEASE}/packages-microsoft-prod.deb > /tmp/packages-microsoft-prod.deb || exit $ERR_MS_PROD_DEB_DOWNLOAD_TIMEOUT
Expand Down
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