archangel/custom/zfs-snap-prune, branch main Arch Linux installer ISO — ZFS-on-root or BTRFS, doubles as rescue disk https://git.cjennings.net/archangel/atom?h=main 2026-01-23T05:21:18+00:00 Replace GRUB with ZFSBootMenu bootloader 2026-01-23T05:21:18+00:00 Craig Jennings c@cjennings.net 2026-01-23T05:21:18+00:00 urn:sha1:3e70ba84c15d69f48f436239e7f0ac9628464c55 This is a major change that replaces the GRUB bootloader with ZFSBootMenu, providing native ZFS boot environment support. Key changes: - EFI partition reduced from 1GB to 512MB (only holds ZFSBootMenu) - EFI now mounts at /efi instead of /boot - Kernel and initramfs live on ZFS root (enables snapshot boot with matching kernel) - Downloads pre-built ZFSBootMenu EFI binary from get.zfsbootmenu.org - Creates EFI boot entries for all disks in multi-disk configurations - Syncs ZFSBootMenu to all EFI partitions for redundancy - Sets org.zfsbootmenu:commandline on zroot/ROOT for kernel cmdline inheritance - Sets bootfs pool property for default boot environment - AMD GPU workarounds (pg_mask, cwsr_enable) added to kernel cmdline when AMD detected Deleted GRUB snapshot tooling (no longer needed): - custom/grub-zfs-snap - custom/40_zfs_snapshots - custom/zz-grub-zfs-snap.hook - custom/zfs-snap-prune Updated helper scripts: - zfssnapshot: removed grub-zfs-snap call, shows ZFSBootMenu tip - zfsrollback: removed grub-zfs-snap call, notes auto-detection Tested configurations: - Single disk installation - 2-disk mirror (mirror-0) - 3-disk RAIDZ1 (raidz1-0) - All boot correctly with ZFSBootMenu Add snapshot retention with automatic pruning 2026-01-18T17:15:57+00:00 Craig Jennings c@cjennings.net 2026-01-18T17:15:57+00:00 urn:sha1:2e8e5cdd980098241fbd5f6d92f05111818f574a Implements hybrid retention policy: - Always keep 20 most recent snapshots - Delete snapshots beyond #20 only if older than 180 days - Genesis snapshot is always protected Features: - zfs-snap-prune script with --dry-run, --test, --verbose modes - Comprehensive test suite (22 tests) - Runs automatically after pacman operations - Daily systemd timer for cleanup - Regenerates GRUB menu after pruning This prevents unbounded snapshot growth while preserving recent history and the genesis snapshot.