53 lines
1.4 KiB
Bash
Executable File
53 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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set -euo pipefail
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echo "=== [1/5] Updating system and installing tools ==="
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sudo apt update
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sudo apt -y upgrade
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sudo apt install -y qemu-guest-agent util-linux haveged ethtool
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echo "=== [2/5] Enabling qemu-guest-agent ==="
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sudo systemctl enable --now qemu-guest-agent
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echo "=== [3/5] Trimming filesystems ==="
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sudo fstrim -av || true
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echo "=== [4/5] Detecting VM network interfaces ==="
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NIC_LIST=$(ls /sys/class/net | grep -Ev '^(lo|docker|br|vmbr|tap|veth)' | xargs)
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echo "VM NICs detected: $NIC_LIST"
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echo "=== [5/5] Creating persistent systemd service to disable offloads ==="
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SERVICE_FILE="/etc/systemd/system/disable-vm-nic-offloads.service"
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sudo tee "$SERVICE_FILE" > /dev/null <<EOF
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[Unit]
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Description=Disable all VM NIC offloads at boot
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After=network.target
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[Service]
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Type=oneshot
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ExecStart=/bin/bash -c '
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$(for nic in $NIC_LIST; do
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echo "/usr/sbin/ethtool -K $nic tx off rx off tso off gso off gro off;"
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echo "/sbin/ip link set $nic txqueuelen 10000;"
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done)
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'
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RemainAfterExit=yes
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[Install]
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WantedBy=multi-user.target
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EOF
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echo "=== Enabling and starting NIC offload disable service ==="
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sudo systemctl daemon-reload
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sudo systemctl enable --now disable-vm-nic-offloads.service
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echo "=== ✅ VM NIC setup complete ==="
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for nic in $NIC_LIST; do
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echo "--- $nic ---"
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ethtool -k "$nic" | grep -E 'segmentation|offload|scatter|checksum'
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ip link show "$nic" | grep txqueuelen
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done
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