Fix netboot: hardcode config values, simplify boot chain
- Hardcode ROOT_URL and OVERLAYROOT in netboot script - Remove cmdline parsing that was failing silently - Simplify boot.ipxe to chain to netboot.ipxe - Add rebuild-initramfs.sh helper script Resolves kernel panic caused by cmdline parsing issues.
This commit is contained in:
@@ -1,17 +1,5 @@
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#!ipxe
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#!ipxe
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echo Booting Ubuntu Noble K3s Node via iPXE
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echo Configuring network via DHCP...
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dhcp
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# Clear any previous images
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echo Chaining to dynamic boot script...
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imgfree
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chain http://192.168.100.1:8800/netboot.ipxe
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echo Loading kernel from http://192.168.100.1:8800/vmlinuz
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kernel --name vmlinuz http://192.168.100.1:8800/vmlinuz
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echo Loading initramfs from http://192.168.100.1:8800/initrd-netboot.img
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initrd --name initrd http://192.168.100.1:8800/initrd-netboot.img
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echo Setting kernel arguments for HTTP root mounting
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imgargs vmlinuz initrd=initrd rdinit=/init boot=netboot root=http://192.168.100.1:8800/filesystem.squashfs rootfstype=squashfs overlayroot=tmpfs ip=dhcp console=tty0 console=ttyS0,115200 loglevel=7 panic=-1 break=mountroot
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echo Booting system...
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boot vmlinuz
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@@ -1,207 +1,85 @@
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#!/bin/sh
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#!/bin/sh
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# Netboot HTTP root mounting - sourced by initramfs init (functions already loaded)
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# Netboot HTTP root mounting - HARDCODED VALUES - no cmdline parsing
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export PATH=/usr/bin:/usr/sbin:/bin:/sbin
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export PATH=/usr/bin:/usr/sbin:/bin:/sbin
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# HARDCODED CONFIGURATION
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ROOT_URL="http://192.168.100.1:8800/filesystem.squashfs"
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OVERLAYROOT="tmpfs"
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MOUNTPOINT=/root
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MOUNTPOINT=/root
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SQUASHFS_MOUNT=/mnt/squashfs
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SQUASHFS_MOUNT=/mnt/squashfs
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OVERLAY_TMPFS=/mnt/overlay
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OVERLAY_TMPFS=/mnt/overlay
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# Hook functions for initramfs-tools boot script integration
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# Debug logging to console
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netboot_top()
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log() {
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{
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echo "$@" > /dev/console 2>&1
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if [ "${netboot_top_used}" != "yes" ]; then
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[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/netboot-top"
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run_scripts /scripts/netboot-top
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[ "$quiet" != "y" ] && log_end_msg
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fi
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netboot_top_used=yes
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}
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}
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netboot_premount()
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# Minimal hook functions
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{
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netboot_top() { :; }
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if [ "${netboot_premount_used}" != "yes" ]; then
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netboot_premount() { :; }
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[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/netboot-premount"
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netboot_bottom() { :; }
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run_scripts /scripts/netboot-premount
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mount_top() { :; }
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[ "$quiet" != "y" ] && log_end_msg
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mount_premount() { :; }
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fi
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mount_bottom() { :; }
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netboot_premount_used=yes
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}
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netboot_bottom()
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{
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if [ "${netboot_premount_used}" = "yes" ] || [ "${netboot_top_used}" = "yes" ]; then
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[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/netboot-bottom"
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run_scripts /scripts/netboot-bottom
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[ "$quiet" != "y" ] && log_end_msg
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fi
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netboot_premount_used=no
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netboot_top_used=no
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}
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# Parse kernel command line for HTTP root
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parse_cmdline() {
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for x in $(cat /proc/cmdline); do
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case $x in
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root=http://*)
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export ROOT_URL="${x#root=}" ;;
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rootfstype=*)
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export ROOTFSTYPE="${x#rootfstype=}" ;;
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overlayroot=*)
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export OVERLAYROOT="${x#overlayroot=}" ;;
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ip=*)
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export BOOTIP="${x#ip=}" ;;
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*)
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: ;;
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esac
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done
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}
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mountroot() {
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mountroot() {
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rc=1
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log "NETBOOT: ========================================"
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log "NETBOOT: mountroot() HARDCODED VERSION"
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log "NETBOOT: ROOT_URL=${ROOT_URL}"
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log "NETBOOT: ========================================"
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# Run hook scripts
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# Load network module
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netboot_top
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/sbin/modprobe af_packet
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netboot_premount
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parse_cmdline
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# Wait for udev
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wait_for_udev 10
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if test -z "${ROOT_URL}"; then
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log_failure_msg "No root URL defined (root=http://... not found)"
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return ${rc}
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fi
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# Configure networking before attempting downloads
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log_begin_msg "Configuring network"
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modprobe af_packet || log_warning_msg "af_packet load failed"
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# Load RTL8125 driver (already in module list but explicit load for debugging)
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modprobe r8125 || log_warning_msg "r8125 driver load failed, may use generic driver"
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# Configure networking via DHCP
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log "NETBOOT: Calling configure_networking..."
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configure_networking
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configure_networking
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udevadm trigger
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timeout 30 udevadm settle || log_warning_msg "udevadm settle timed out"
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export DEVICE
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log_end_msg
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# Validate networking is up
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# Check we got an IP
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INTERFACE_UP=0
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log "NETBOOT: Checking for IP address..."
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for iface in $(ip link show | grep "^[0-9]" | awk -F: '{print $2}' | tr -d ' '); do
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if ! ip addr show | grep -q "inet "; then
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if ip addr show "$iface" | grep -q "inet "; then
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log "NETBOOT: FATAL - no IP address"
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INTERFACE_UP=1
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return 1
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log_begin_msg "Interface $iface has IP address"
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fi
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ip addr show "$iface" | grep "inet " | awk '{print $2}'
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log "NETBOOT: Network is up"
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break
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fi
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done
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if [ $INTERFACE_UP -eq 0 ]; then
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# Download squashfs
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log_failure_msg "No network interface obtained an IP address"
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log "NETBOOT: Downloading ${ROOT_URL}..."
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return ${rc}
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if ! wget -O /filesystem.squashfs "${ROOT_URL}"; then
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log "NETBOOT: FATAL - wget failed"
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return 1
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fi
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log "NETBOOT: Download complete"
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# Create mount points
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mkdir -p "${SQUASHFS_MOUNT}" "${OVERLAY_TMPFS}"
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# Mount squashfs
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log "NETBOOT: Mounting squashfs..."
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if ! mount -t squashfs /filesystem.squashfs "${SQUASHFS_MOUNT}" -o ro; then
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log "NETBOOT: FATAL - squashfs mount failed"
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return 1
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fi
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fi
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# Extract filename from URL
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# Mount tmpfs for overlay
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FILE_NAME=$(basename "${ROOT_URL}")
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log "NETBOOT: Mounting tmpfs..."
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FILE_PATH="/${FILE_NAME}"
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if ! mount -t tmpfs -o size=2G tmpfs "${OVERLAY_TMPFS}"; then
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log "NETBOOT: FATAL - tmpfs mount failed"
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return 1
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fi
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mkdir -p "${OVERLAY_TMPFS}/upper" "${OVERLAY_TMPFS}/work"
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# Download the root filesystem with retries and timeouts
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# Mount overlay
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log_begin_msg "Downloading root filesystem from ${ROOT_URL}"
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log "NETBOOT: Mounting overlay..."
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if wget --timeout=30 --tries=3 --waitretry=5 \
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if ! mount -t overlay -o "lowerdir=${SQUASHFS_MOUNT},upperdir=${OVERLAY_TMPFS}/upper,workdir=${OVERLAY_TMPFS}/work" overlay "${MOUNTPOINT}"; then
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--progress=dot:mega \
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log "NETBOOT: FATAL - overlay mount failed"
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"${ROOT_URL}" -O "${FILE_PATH}"; then
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return 1
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log_end_msg
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else
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log_failure_msg "Failed to download from ${ROOT_URL} after retries"
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rm -f "${FILE_PATH}"
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return ${rc}
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fi
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fi
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# Verify the downloaded file is a valid SquashFS
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log "NETBOOT: SUCCESS - root mounted at ${MOUNTPOINT}"
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if ! file "${FILE_PATH}" | grep -q "Squash"; then
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return 0
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log_failure_msg "Downloaded file is not a valid SquashFS image"
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rm -f "${FILE_PATH}"
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return ${rc}
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fi
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# Handle SquashFS images with overlay
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if echo "${FILE_NAME}" | grep -q squashfs; then
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log_begin_msg "Setting up SquashFS with overlay"
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# Setup overlay if requested - need separate mount points
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if [ -n "${OVERLAYROOT}" ]; then
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# Create mount points
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mkdir -p "${SQUASHFS_MOUNT}" "${OVERLAY_TMPFS}"
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# Mount read-only SquashFS to separate location
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if ! mount -t squashfs "${FILE_PATH}" "${SQUASHFS_MOUNT}" -o ro; then
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log_failure_msg "Failed to mount SquashFS at ${SQUASHFS_MOUNT}"
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rm -f "${FILE_PATH}"
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return ${rc}
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fi
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log_begin_msg "SquashFS mounted at ${SQUASHFS_MOUNT}"
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log_end_msg
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log_begin_msg "Mounting tmpfs for overlay upper/work"
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# Create tmpfs for upper and work directories
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if ! mount -t tmpfs -o size=2G tmpfs_overlay "${OVERLAY_TMPFS}"; then
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log_failure_msg "Failed to mount tmpfs for overlay"
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umount "${SQUASHFS_MOUNT}"
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rm -f "${FILE_PATH}"
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return ${rc}
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fi
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# Create overlay structure
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mkdir -p "${OVERLAY_TMPFS}/upper" "${OVERLAY_TMPFS}/work"
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# Mount overlay combining read-only lower + writable upper onto /root
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if ! mount -t overlay \
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-o "lowerdir=${SQUASHFS_MOUNT},upperdir=${OVERLAY_TMPFS}/upper,workdir=${OVERLAY_TMPFS}/work" \
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overlay_root "${MOUNTPOINT}"; then
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log_failure_msg "Failed to mount overlay filesystem"
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umount "${OVERLAY_TMPFS}"
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umount "${SQUASHFS_MOUNT}"
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rm -f "${FILE_PATH}"
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return ${rc}
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fi
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log_end_msg
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log_begin_msg "Overlay mounted at ${MOUNTPOINT} (lower=${SQUASHFS_MOUNT})"
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log_end_msg
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# Clean up downloaded image as it's now mounted
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rm -f "${FILE_PATH}"
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rc=0
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else
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# Direct SquashFS mount without overlay - mount directly to /root
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if ! mount -t squashfs "${FILE_PATH}" "${MOUNTPOINT}" -o ro; then
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log_failure_msg "Failed to mount SquashFS at ${MOUNTPOINT}"
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rm -f "${FILE_PATH}"
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return ${rc}
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fi
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log_begin_msg "Mounted SquashFS without overlay at ${MOUNTPOINT}"
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log_end_msg
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rc=0
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fi
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else
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log_failure_msg "Unknown filesystem type: ${FILE_NAME}"
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rm -f "${FILE_PATH}"
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fi
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return ${rc}
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}
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# Standard mount hook wrappers expected by initramfs init
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mount_top()
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{
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netboot_top
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}
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mount_premount()
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{
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netboot_premount
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}
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mount_bottom()
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{
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netboot_bottom
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}
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}
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51
rebuild-initramfs.sh
Executable file
51
rebuild-initramfs.sh
Executable file
@@ -0,0 +1,51 @@
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#!/bin/bash
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# Rebuild initramfs with updated netboot script
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set -e
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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BUILD_DIR="$SCRIPT_DIR/build"
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ROOTFS="$BUILD_DIR/rootfs"
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HTTP_DIR="$SCRIPT_DIR/http"
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if [ ! -d "$ROOTFS" ]; then
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echo "ERROR: Rootfs not found at $ROOTFS"
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echo "Run build-image.sh first"
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exit 1
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fi
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echo "=== Copying updated initramfs scripts ==="
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cp "$SCRIPT_DIR/initramfs/scripts/netboot" "$ROOTFS/usr/share/initramfs-tools/scripts/netboot"
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cp "$SCRIPT_DIR/initramfs/hooks/netboot" "$ROOTFS/usr/share/initramfs-tools/hooks/netboot"
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cp "$SCRIPT_DIR/initramfs/initramfs.conf" "$ROOTFS/etc/initramfs-tools/initramfs.conf"
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cp "$SCRIPT_DIR/initramfs/modules" "$ROOTFS/etc/initramfs-tools/modules"
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echo "=== Getting kernel version ==="
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KVER=$(ls "$ROOTFS/lib/modules/" | head -1)
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echo "Kernel version: $KVER"
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echo "=== Mounting filesystems for chroot ==="
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mount --bind /proc "$ROOTFS/proc"
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mount --bind /sys "$ROOTFS/sys"
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mount --bind /dev "$ROOTFS/dev"
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cleanup() {
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echo "=== Cleaning up mounts ==="
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umount "$ROOTFS/proc" 2>/dev/null || true
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umount "$ROOTFS/sys" 2>/dev/null || true
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umount "$ROOTFS/dev" 2>/dev/null || true
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}
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trap cleanup EXIT
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echo "=== Rebuilding initramfs ==="
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chroot "$ROOTFS" mkinitramfs -v -o /boot/initrd-netboot.img "$KVER"
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echo "=== Copying to http directory ==="
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cp "$ROOTFS/boot/initrd-netboot.img" "$HTTP_DIR/"
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chmod 644 "$HTTP_DIR/initrd-netboot.img"
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echo ""
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echo "=== Done! ==="
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echo "New initramfs: $HTTP_DIR/initrd-netboot.img"
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ls -lh "$HTTP_DIR/initrd-netboot.img"
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echo ""
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echo "Run 'make deploy' to sync to NAS"
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Reference in New Issue
Block a user