18537acbbc
WinPE clients re-imaging the same machine hit "System error 53 - network path not found" on the second attempt. systemctl restart smbd did not help; only a full server power cycle cleared the state. Root cause is kernel nf_conntrack: the default TCP ESTABLISHED timeout is 5 days (432000s), so a session from the first WinPE run whose client rebooted abnormally leaves an ASSURED ESTABLISHED entry that ufw's state-tracking rules then mis-classify the new SYN against. Fix applied in three layers: - /etc/sysctl.d/99-pxe-conntrack.conf drops TCP ESTABLISHED timeout to 1 hour and shortens the half-closed states to 30s each. - smb.conf gains socket options TCP_NODELAY SO_KEEPALIVE IPTOS_LOWDELAY plus keepalive = 30 and deadtime = 5. Active sessions refresh the conntrack timer every 30s via keepalives so they never age out; dead ones expire in an hour. - /usr/local/sbin/smb-diag.sh snapshots kernel + Samba state for remote diagnosis; /usr/local/sbin/smb-soft-reset.sh walks a progressive recovery (nmbd/smbd restart, conntrack flush, arp flush, ss -K) as an alternative to power-cycling. conntrack package added to download-packages.sh and playbook verify list so the offline .deb bundle ships with it. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
96 lines
2.6 KiB
Bash
Executable File
96 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# download-packages.sh — Download all .deb packages needed for offline PXE server setup
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#
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# Run this on a machine with internet access running Ubuntu 24.04 (Noble).
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# It downloads every .deb needed by the Ansible playbook into a local directory,
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# which then gets bundled onto the installer USB.
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#
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# Usage:
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# ./download-packages.sh [output_directory]
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#
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# Default output: ./offline-packages/
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set -euo pipefail
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OUT_DIR="${1:-./offline-packages}"
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mkdir -p "$OUT_DIR"
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# Packages installed by the Ansible playbook (pxe_server_setup.yml)
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PLAYBOOK_PACKAGES=(
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ansible
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dnsmasq
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apache2
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samba
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unzip
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ufw
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cron
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wimtools
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p7zip-full
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grub-efi-amd64-bin
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grub-common
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conntrack
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)
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# Packages installed during autoinstall late-commands (NetworkManager, WiFi, etc.)
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# These are already in your ubuntu_playbook/*.deb files, but we can refresh them here too.
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AUTOINSTALL_PACKAGES=(
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network-manager
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wpasupplicant
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wireless-tools
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linux-firmware
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firmware-sof-signed
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)
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ALL_PACKAGES=("${PLAYBOOK_PACKAGES[@]}" "${AUTOINSTALL_PACKAGES[@]}")
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echo "============================================"
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echo "Offline Package Downloader"
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echo "============================================"
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echo "Output directory: $OUT_DIR"
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echo ""
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echo "Packages to resolve:"
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printf ' - %s\n' "${ALL_PACKAGES[@]}"
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echo ""
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# Update package cache
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echo "[1/3] Updating package cache..."
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sudo apt-get update -qq
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# Simulate install to find all dependencies
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echo "[2/3] Resolving dependencies..."
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DEPS=$(apt-get install --simulate "${ALL_PACKAGES[@]}" 2>&1 \
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| grep "^Inst " \
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| awk '{print $2}' \
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| sort -u)
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DEP_COUNT=$(echo "$DEPS" | wc -l)
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echo " Found $DEP_COUNT packages (including dependencies)"
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# Download all packages
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echo "[3/4] Downloading .deb packages to $OUT_DIR..."
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cd "$OUT_DIR"
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apt-get download $DEPS 2>&1 | tail -5
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DEB_COUNT=$(ls -1 *.deb 2>/dev/null | wc -l)
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TOTAL_SIZE=$(du -sh . | cut -f1)
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echo " $DEB_COUNT packages ($TOTAL_SIZE)"
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# Download pip wheels for Flask webapp (offline install)
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echo "[4/4] Downloading Python wheels for webapp..."
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PIP_DIR="$(dirname "$OUT_DIR")/pip-wheels"
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mkdir -p "$PIP_DIR"
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pip3 download -d "$PIP_DIR" flask lxml 2>&1 | tail -5
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WHL_COUNT=$(ls -1 "$PIP_DIR"/*.whl "$PIP_DIR"/*.tar.gz 2>/dev/null | wc -l)
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echo " $WHL_COUNT Python packages downloaded to pip-wheels/"
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echo ""
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echo "============================================"
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echo "Download complete!"
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echo "============================================"
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echo " .deb packages: $DEB_COUNT ($TOTAL_SIZE) in $OUT_DIR/"
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echo " Python wheels: $WHL_COUNT in $PIP_DIR/"
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echo ""
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