Add DGX OS 7 Packer template for MAAS#6
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dholt merged 13 commits intoDeepOps:masterfrom Feb 4, 2026
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This adds support for building MAAS-deployable images of NVIDIA DGX OS 7, which is based on Ubuntu 24.04 LTS with kernel 6.8. Key changes: - New dgxos7/ directory with packer template and autoinstall config - Uses DGX installer's native force-ai parameter to deliver custom config - Supports DGX H100, H200, B200, B300, and A100 platforms - Requires UEFI boot (OVMF firmware) Also includes: - Fix scripts/tar-root to handle GPT partition layouts (root on p2 vs p1) - Update README.md with template overview - Update dgxos5/README.md to reference dgxos7 for newer hardware Tested with DGX OS 7.3.1 ISO on QEMU/KVM with OVMF. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Remove cloud-init.disabled marker so cloud-init runs on deployment - Disable cloud-init network config so MAAS can manage networking - Add fallback netplan DHCP config for packer build phase Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add proper network section with DHCP for all en* interfaces - Remove cloud-init network disable (let cloud-init work normally) - Remove late-commands netplan hack (was virtio-only, broke Intel NICs) - Keep rm of cloud-init.disabled marker so cloud-init runs on MAAS deploy Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The DGX installer's 99-installer.cfg has a deferred write_files that recreates /etc/cloud/cloud-init.disabled after first boot, which breaks MAAS deployment. Delete this config file in late-commands. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add provisioner to remove cloud-init.disabled and 99-installer.cfg after first boot but before tarball creation - These files were causing cloud-init to be disabled on MAAS deploy - Add sync command to ensure filesystem changes persist to disk - Remove redundant late-command (now handled by provisioner) Cloud-init now properly starts on MAAS-deployed systems. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
…NSTALL_PKGS
The build was only installing base Ubuntu because:
1. force-platform was hardcoded to 'kvm' instead of using the platform variable
2. packer-ai.yaml was missing the CHANGE_INSTALL_PKGS placeholder
Changes:
- dgxos7.json: Use {{user `platform`}} (defaults to dgx_h100) instead of hardcoded kvm
- packer-ai.yaml: Add apt config to disable Ubuntu suites during install
- packer-ai.yaml: Add CHANGE_INSTALL_PKGS late-command for DGX package installation
- packer-ai.yaml: Mount ISO cdrom for package installation
- packer-ai.yaml: Restore apt sources.list.d after install
- packer-ai.yaml: Enable nvidia-persistenced service
The preseed.sh script substitutes CHANGE_INSTALL_PKGS with packages from
/ai/${platform}-pkgs based on the force-platform setting.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The boot_command was appending parameters to the wrong line in the GRUB editor. With only one <down> after 'e', parameters landed on a blank line instead of the linux command line. Changes: - Fix boot_command: use two <down> presses after 'e' to reach linux line - Add nooemconfig parameter to skip OEM config packages - Use hardcoded 10.0.2.2 for QEMU user-mode networking - Add early-commands to replace nv-eula.sh with no-op - Add late-commands for dpkg-divert EULA bypass - Use hardcoded package list excluding nvidia-oem-config-eula - Update .gitignore to exclude Claude Code files and build artifacts - Update README with correct boot parameters Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Run cloud-init clean --logs to reset cloud-init state before creating the tarball. Without this, cloud-init thinks it already ran during the packer build and won't re-run on MAAS deployment. Also remove 90-installer-network.cfg and /etc/fstab to let MAAS control networking and storage configuration. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add curtin-hooks and setup-bootloader scripts for proper UEFI boot - Fix provisioner order: run cloud-init clean before removing disable files - Add first-boot marker for dgx-release service - Use fuse-tar-root instead of tar-root for image creation - Update README with build dependencies and clarify tarball extraction Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The tar-root script is needed by dgxos5 which uses the older setup-nbd/tar-root approach. Auto-detects GPT vs MBR layouts. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Replace hardcoded package list with CHANGE_INSTALL_PKGS placeholder - preseed.sh substitutes this with platform-specific packages at install time - Add fallback `|| apt-get install -f -y` to handle dependency issues - Add EULA notice to README This makes the template more maintainable as package updates come from the ISO rather than requiring manual updates to the template. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add notes to README about: - MAAS CLI requiring image file in current working directory - How to replace an existing image in MAAS Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
dgxos7/directory with Packer template for building NVIDIA DGX OS 7 images deployable via MAASscripts/tar-rootfor extracting root filesystem (used by dgxos5)Key Features
force-aimechanism for autoinstall config deliverynooemconfigkernel parameterTest Plan