Blancco: playbook now produces working Ubuntu-kernel initramfs out of the box
Companion to the previous commit (4550d43). Three files that should have
been in the same commit but got left out of `git add`:
- .gitignore: negate rule for boot-tools/blancco/grub-blancco.cfg so the
tracked cfg (source of truth for grubx64.efi rebuilds) survives
the blanket boot-tools/ ignore.
- playbook/blancco-init.sh: rewritten for modprobe-with-deps, full NIC
driver coverage, set -x trace to /dev/console, dmesg + PCI-device +
/proc/modules dump + interactive shell on "no NIC after 60s".
Replaces the narrow insmod-loop version that silently hung on
unsupported NICs.
- playbook/pxe_server_setup.yml "Build Blancco PXE initramfs" task now
sweeps the full drivers/net/ tree (ethernet + phy + mdio + usb + fddi
+ wan) plus overlay / squashfs / loop / ptp / libphy / mii deps, runs
depmod to regenerate modules.dep inside the initramfs (required for
modprobe dependency resolution), and symlinks the full applet list
blancco-init.sh needs (modprobe, insmod, dmesg, find, env, etc).
Result: ~20 MB initramfs vs the old 2 MB narrow build.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
cproudlock
@@ -2,167 +2,125 @@
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# Blancco PXE Loader - init script for custom initramfs
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# Boot chain: iPXE -> GRUB EFI -> Ubuntu kernel + this initramfs -> switch_root to Blancco
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#
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# Blancco's own kernel freezes on Dell Precision towers during PXE boot.
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# Workaround: boot Ubuntu kernel, download Blancco rootfs (squashfs), mount
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# overlay filesystem, and switch_root into Blancco's userspace.
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# Blancco's own kernel freezes / lacks NIC drivers for some Dell Precision
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# hardware during PXE boot. Workaround: boot Ubuntu kernel (which has a wider
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# NIC driver set), download Blancco rootfs (squashfs), overlay-mount, and
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# switch_root into Blancco's userspace.
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#
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# Verbose trace + shell-on-NIC-failure because silent hangs during Blancco
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# PXE boot are painful to debug. set -x goes to /dev/console so the screen
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# shows every step; if no NIC appears after the modprobe sweep, we dump
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# dmesg / lspci / /proc/modules and drop to sh so the operator can
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# investigate without re-imaging.
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exec >/dev/console 2>&1
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set -x
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echo ""
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echo "============================================"
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echo " Blancco PXE loader (verbose)"
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echo "============================================"
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echo ""
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export PATH=/bin:/sbin
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echo ""
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echo "============================================"
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echo " Blancco PXE loader"
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echo "============================================"
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echo ""
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devtmpfs devtmpfs /dev 2>/dev/null
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mkdir -p /tmp /run
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mount -t devtmpfs devtmpfs /dev 2>/dev/null || mount -t tmpfs tmpfs /dev
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mkdir -p /tmp /run /run/lower /run/upper /run/work /run/newroot
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KVER=$(uname -r)
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echo "Running kernel: $KVER"
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ls /lib/modules/ 2>/dev/null
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echo "[1/4] Loading NIC drivers..."
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for mod in /lib/modules/*.ko; do
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echo " insmod $(basename $mod)"
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insmod $mod 2>/dev/null || true
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echo "[1/5] Loading NIC drivers via modprobe (resolves deps automatically)..."
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# Throw the full common-NIC driver list at the wall. modprobe resolves the
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# deps from /lib/modules/$KVER/modules.dep (built by prepare-boot-tools).
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# Anything missing is silently ignored; whatever matches PCI IDs will bind.
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for drv in \
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mii libphy ptp \
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e1000 e1000e igb igc ixgbe ixgbevf i40e ice iavf \
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tg3 bnx2 bnx2x bnxt_en b44 \
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r8169 r8152 atlantic \
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vmxnet3 virtio_net virtio_pci \
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pcnet32 8139too 8139cp \
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sfc sfc_ef100 mlx4_en mlx5_core \
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alx atl1c atl1e atl2 \
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via_rhine via_velocity forcedeth \
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pegasus dm9601 asix ax88179_178a cdc_ether cdc_ncm rndis_host; do
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modprobe -v "$drv" 2>/dev/null && echo " OK $drv" || true
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done
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sleep 5
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sleep 3
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echo " Interfaces after driver load:"
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ls /sys/class/net/ 2>/dev/null
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echo "[2/5] /sys/class/net after driver load:"
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ls /sys/class/net/ || true
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ip link || true
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echo " Waiting for network interface..."
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echo " Waiting up to 60s for non-lo interface..."
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IFACE=""
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COUNT=0
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while [ $COUNT -lt 60 ]; do
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for i in /sys/class/net/*; do
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ifname="${i##*/}"
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if [ "$ifname" != "lo" ] && [ -d "$i" ]; then
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IFACE=$ifname
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break 2
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fi
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for i in $(seq 1 60); do
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for n in /sys/class/net/*; do
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name="${n##*/}"
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[ "$name" = "lo" ] && continue
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[ -d "$n" ] && IFACE="$name" && break 2
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done
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COUNT=$((COUNT + 1))
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sleep 1
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echo -n "."
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done
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echo ""
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if [ -z "$IFACE" ]; then
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echo "ERROR: No network interface found!"
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echo "Available interfaces:"
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ls /sys/class/net/ 2>/dev/null
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exec sh
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echo "ERROR: No network interface after 60s"
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echo "=== dmesg tail ==="; dmesg | tail -40
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echo "=== PCI devices (sysfs) ==="; ls /sys/bus/pci/devices/ 2>/dev/null
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echo "=== loaded modules ==="; cat /proc/modules
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echo "Dropping to shell - type 'exit' to reboot."
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exec /bin/sh
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fi
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echo " Interface: $IFACE"
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ip link set $IFACE up
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echo " IFACE=$IFACE, bringing up..."
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ip link set "$IFACE" up || ifconfig "$IFACE" up
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sleep 2
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SERVER=10.9.100.1
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ifconfig $IFACE 10.9.100.250 netmask 255.255.255.0 up
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ifconfig "$IFACE" 10.9.100.250 netmask 255.255.255.0 up
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sleep 1
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echo " IP: 10.9.100.250"
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echo " IP: 10.9.100.250 SERVER: $SERVER"
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ip addr
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echo "[2/4] Downloading Blancco rootfs (666MB)..."
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echo "[3/5] Downloading airootfs.sfs (~756 MB)..."
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wget -O /tmp/airootfs.sfs http://$SERVER/blancco/arch/x86_64/airootfs.sfs 2>&1
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if [ ! -s /tmp/airootfs.sfs ]; then
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echo "ERROR: Failed to download rootfs!"
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exec sh
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fi
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echo " OK ($(wc -c < /tmp/airootfs.sfs) bytes)"
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echo "[3/4] Mounting rootfs..."
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mkdir -p /run/lower /run/upper /run/work /run/newroot
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[ -s /tmp/airootfs.sfs ] || { echo "ERROR: download failed"; exec /bin/sh; }
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echo "[4/5] Mounting rootfs + overlay..."
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modprobe overlay 2>/dev/null || insmod /lib/modules/$KVER/kernel/fs/overlayfs/overlay.ko 2>/dev/null
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modprobe squashfs 2>/dev/null || insmod /lib/modules/$KVER/kernel/fs/squashfs/squashfs.ko 2>/dev/null
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modprobe loop 2>/dev/null
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losetup /dev/loop0 /tmp/airootfs.sfs
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mount -t squashfs -o ro /dev/loop0 /run/lower
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if [ $? -ne 0 ]; then
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echo "ERROR: squashfs mount failed!"
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exec sh
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fi
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insmod /lib/modules/overlay.ko 2>/dev/null
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mount -t tmpfs -o size=50% tmpfs /run/upper
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mkdir -p /run/upper/upper /run/upper/work
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mount -t overlay overlay -o lowerdir=/run/lower,upperdir=/run/upper/upper,workdir=/run/upper/work /run/newroot
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if [ $? -ne 0 ]; then
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echo "ERROR: overlay mount failed!"
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exec sh
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fi
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echo "[4/5] Installing kernel modules (132MB)..."
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echo "[5/5] Fetching kmod tarball + config..."
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wget -O /tmp/kmod.tar.gz http://$SERVER/blancco/kmod.tar.gz 2>&1
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if [ -s /tmp/kmod.tar.gz ]; then
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cd /run/newroot
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gunzip -c /tmp/kmod.tar.gz | tar xf -
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rm -f /tmp/kmod.tar.gz
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cd /
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echo " OK"
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else
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echo " WARNING: Failed to download kernel modules"
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fi
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[ -s /tmp/kmod.tar.gz ] && (cd /run/newroot && gunzip -c /tmp/kmod.tar.gz | tar xf - && rm -f /tmp/kmod.tar.gz)
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echo "[5/6] Switching root to Blancco..."
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mkdir -p /run/newroot/run /run/newroot/proc /run/newroot/sys /run/newroot/dev /run/newroot/tmp
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mkdir -p /run/newroot/albus
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wget -O /run/newroot/albus/config.xml http://$SERVER/blancco/config-clean.xml 2>&1 || true
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wget -O /run/newroot/albus/preferences.xml http://$SERVER/blancco/preferences.xml 2>&1 || true
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cp -f /run/newroot/albus/preferences.xml /run/newroot/albus/preferences.save 2>/dev/null || true
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echo "[6/6] Downloading Blancco config..."
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wget -O /run/newroot/albus/config.xml http://$SERVER/blancco/config-clean.xml 2>&1
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wget -O /run/newroot/albus/preferences.xml http://$SERVER/blancco/preferences.xml 2>&1
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if [ -s /run/newroot/albus/config.xml ]; then
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echo " config.xml: $(wc -c < /run/newroot/albus/config.xml) bytes"
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else
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echo " WARNING: Failed to download config.xml"
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fi
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if [ -s /run/newroot/albus/preferences.xml ]; then
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cp -f /run/newroot/albus/preferences.xml /run/newroot/albus/preferences.save
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echo " preferences.xml: $(wc -c < /run/newroot/albus/preferences.xml) bytes"
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else
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echo " WARNING: Failed to download preferences.xml"
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fi
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# Pre-configure X.org to use modesetting driver (generic KMS, works with all GPUs)
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mkdir -p /run/newroot/etc/X11/xorg.conf.d
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echo " X.org: forcing modesetting driver"
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cat > /run/newroot/etc/X11/xorg.conf.d/20-failsafeDriver.conf << 'XEOF'
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cat > /run/newroot/etc/X11/xorg.conf.d/20-failsafeDriver.conf << XEOF
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Section "Device"
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Identifier "Failsafe Video Device"
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Driver "modesetting"
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EndSection
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XEOF
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# Enable SSH for remote debugging
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echo " Enabling SSH (root:blancco)..."
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if [ -f /run/newroot/etc/ssh/sshd_config ]; then
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sed 's/^#*PermitRootLogin.*/PermitRootLogin yes/' /run/newroot/etc/ssh/sshd_config > /run/newroot/etc/ssh/sshd_config.new || true
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mv /run/newroot/etc/ssh/sshd_config.new /run/newroot/etc/ssh/sshd_config || true
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fi
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cat > /run/newroot/etc/rc.local << 'RCEOF'
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#!/bin/bash
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echo 'root:blancco' | chpasswd
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ssh-keygen -A 2>/dev/null
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/usr/bin/sshd 2>/dev/null
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RCEOF
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chmod +x /run/newroot/etc/rc.local
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cat > /run/newroot/etc/systemd/system/pxe-debug.service << 'SVCEOF'
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[Unit]
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Description=PXE Debug SSH
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After=network.target
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[Service]
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Type=oneshot
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RemainAfterExit=yes
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ExecStart=/etc/rc.local
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[Install]
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WantedBy=multi-user.target
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SVCEOF
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ln -sf /etc/systemd/system/pxe-debug.service /run/newroot/etc/systemd/system/multi-user.target.wants/pxe-debug.service 2>/dev/null
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mkdir -p /run/newroot/proc /run/newroot/sys /run/newroot/dev /run/newroot/run /run/newroot/tmp
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mount --move /proc /run/newroot/proc
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mount --move /sys /run/newroot/sys
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mount --move /dev /run/newroot/dev
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echo " Starting Blancco..."
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echo "Switching root..."
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exec switch_root /run/newroot /sbin/init
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