68 lines
1.8 KiB
Bash
Executable File
68 lines
1.8 KiB
Bash
Executable File
#!/bin/bash
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set -euo pipefail
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echo "=== [1/5] Installing essentials ==="
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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 lshw dmidecode
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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] Creating conditional NIC tuning script ==="
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TUNER_SCRIPT="/usr/local/sbin/conditional-nic-tuning.sh"
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sudo tee "$TUNER_SCRIPT" > /dev/null <<'EOSCRIPT'
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#!/bin/bash
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set -euo pipefail
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HYPERVISOR=$(systemd-detect-virt)
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BROADCOM_FOUND=$(lspci | grep -i "broadcom" || true)
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if [[ "$HYPERVISOR" == "kvm" && -n "$BROADCOM_FOUND" ]]; then
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echo "✅ Broadcom NIC on KVM detected — applying NIC tuning"
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for nic in /sys/class/net/*; do
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name=$(basename "$nic")
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[[ "$name" =~ ^(lo|vmbr|tap|veth|docker) ]] && continue
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echo "→ Tuning $name"
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/usr/sbin/ethtool -K "$name" tx off rx off tso off gso off gro off || true
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/sbin/ip link set "$name" txqueuelen 10000 || true
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done
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else
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echo "❌ Skipping NIC tuning — not KVM with Broadcom NIC"
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fi
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EOSCRIPT
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sudo chmod +x "$TUNER_SCRIPT"
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echo "=== [5/5] Creating systemd service file ==="
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SERVICE_FILE="/etc/systemd/system/conditional-nic-offload.service"
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sudo tee "$SERVICE_FILE" > /dev/null <<EOF
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[Unit]
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Description=Disable NIC offloads only if KVM + Broadcom detected
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=oneshot
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ExecStart=$TUNER_SCRIPT
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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 "=== Reloading systemd and enabling service ==="
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sudo systemctl daemon-reexec
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sudo systemctl daemon-reload
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sudo systemctl enable --now conditional-nic-offload.service
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echo "=== ✅ VM NIC conditional optimization complete ==="
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