feat: full VPS network optimization with auto-detect

2026-02-22 20:47:32 +08:00
parent 725a3cfd5b
commit 0ed33ad4e3
2 changed files with 168 additions and 62 deletions
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# TCP BBR 一键开启
+# ⚡ VPS 网络极限优化

-一键开启/关闭 TCP BBR 加速，支持交互菜单和命令行模式。
+自动检测 VPS 配置（CPU/内存/带宽），一键开启 BBR + 内核参数调优，发挥最大网络性能。

 ## 一键安装

@@ -8,13 +8,24 @@
 curl -sL https://cdn.jsdelivr.net/gh/xmg0828888/tcp-bbr@main/bbr.sh -o bbr.sh && chmod +x bbr.sh && ./bbr.sh
 ```

+## 优化内容
+
+- **BBR 拥塞控制** — 替代 cubic，大幅提升吞吐量
+- **TCP 缓冲区** — 根据内存自动计算最优值（512M/2G/8G/16G+ 四档）
+- **TCP FastOpen** — 减少握手延迟
+- **连接队列** — somaxconn / backlog 自动调大
+- **TIME_WAIT 回收** — tw_reuse + fin_timeout 缩短
+- **文件描述符** — 自动提升上限
+- **网卡优化** — TSO/GSO/GRO 硬件卸载
+- **MTU 探测** — 自动寻找最优 MTU
+
 ## 命令行模式

 ```bash
-./bbr.sh enable   # 开启 BBR
-./bbr.sh disable  # 关闭 BBR
-./bbr.sh status   # 查看状态
-./bbr.sh          # 交互菜单
+./bbr.sh optimize  # 一键优化
+./bbr.sh status    # 查看状态
+./bbr.sh restore   # 恢复默认
+./bbr.sh           # 交互菜单
 ```

 ## 要求
--- a/bbr.sh
+++ b/bbr.sh
@@ -1,87 +1,182 @@
 #!/bin/bash
-# TCP BBR 一键开启脚本
+# VPS 网络极限优化脚本 - 自动检测配置，发挥最大速度
 # https://github.com/xmg0828888/tcp-bbr

-RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'; NC='\033[0m'
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'; CYAN='\033[0;36m'; NC='\033[0m'
+[ "$(id -u)" != "0" ] && echo -e "${RED}请使用 root 运行${NC}" && exit 1

-check_root() { [ "$(id -u)" != "0" ] && echo -e "${RED}请使用 root 运行${NC}" && exit 1; }
-check_os() { [ ! -f /etc/os-release ] && echo -e "${RED}不支持的系统${NC}" && exit 1; }
+CORES=$(nproc)
+MEM_MB=$(free -m | awk '/Mem:/{print $2}')
+MEM_BYTES=$((MEM_MB * 1024 * 1024))
+IFACE=$(ip route | awk '/default/{print $5}' | head -1)

-show_status() {
-    echo -e "\n${GREEN}=== TCP BBR 状态 ===${NC}"
+show_info() {
+    echo -e "${CYAN}╔══════════════════════════════════╗${NC}"
+    echo -e "${CYAN}║   VPS 网络极限优化脚本 v1.0      ║${NC}"
+    echo -e "${CYAN}╚══════════════════════════════════╝${NC}"
+    echo -e "CPU: ${YELLOW}${CORES} 核${NC}  内存: ${YELLOW}${MEM_MB}MB${NC}  内核: ${YELLOW}$(uname -r)${NC}"
+    echo -e "网卡: ${YELLOW}${IFACE}${NC}"
    local algo=$(sysctl -n net.ipv4.tcp_congestion_control 2>/dev/null)
    local qdisc=$(sysctl -n net.core.default_qdisc 2>/dev/null)
-    local bbr_mod=$(lsmod | grep -c bbr)
-    echo -e "拥塞算法: ${YELLOW}${algo}${NC}"
-    echo -e "队列调度: ${YELLOW}${qdisc}${NC}"
-    if [ "$algo" = "bbr" ] && [ "$bbr_mod" -gt 0 ]; then
-        echo -e "BBR 状态: ${GREEN}✓ 已开启${NC}"
+    echo -e "拥塞算法: ${YELLOW}${algo}${NC}  队列: ${YELLOW}${qdisc}${NC}"
+    if [ "$algo" = "bbr" ]; then
+        echo -e "BBR: ${GREEN}✓ 已开启${NC}"
    else
-        echo -e "BBR 状态: ${RED}✗ 未开启${NC}"
+        echo -e "BBR: ${RED}✗ 未开启${NC}"
    fi
    echo ""
 }

-enable_bbr() {
-    echo -e "${GREEN}正在开启 BBR...${NC}"
-    
-    # 写入 sysctl 配置
-    sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf
-    sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf
-    echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
-    echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
-    
-    sysctl -p >/dev/null 2>&1
-    
-    # 验证
-    local algo=$(sysctl -n net.ipv4.tcp_congestion_control 2>/dev/null)
-    if [ "$algo" = "bbr" ]; then
-        echo -e "${GREEN}✓ BBR 开启成功！${NC}"
+# 根据内存自动计算缓冲区大小
+calc_buffers() {
+    if [ $MEM_MB -le 512 ]; then
+        RMEM_MAX=8388608; WMEM_MAX=8388608; NETDEV_BUDGET=300
+        TCP_MEM="65536 131072 262144"; TCP_RMEM="4096 87380 4194304"; TCP_WMEM="4096 65536 4194304"
+        BACKLOG=1000; SOMAXCONN=1024; CONNTRACK=16384
+    elif [ $MEM_MB -le 2048 ]; then
+        RMEM_MAX=16777216; WMEM_MAX=16777216; NETDEV_BUDGET=600
+        TCP_MEM="131072 262144 524288"; TCP_RMEM="4096 87380 8388608"; TCP_WMEM="4096 65536 8388608"
+        BACKLOG=2000; SOMAXCONN=2048; CONNTRACK=65536
+    elif [ $MEM_MB -le 8192 ]; then
+        RMEM_MAX=33554432; WMEM_MAX=33554432; NETDEV_BUDGET=1200
+        TCP_MEM="262144 524288 1048576"; TCP_RMEM="4096 87380 16777216"; TCP_WMEM="4096 65536 16777216"
+        BACKLOG=5000; SOMAXCONN=4096; CONNTRACK=131072
    else
-        echo -e "${RED}✗ BBR 开启失败，内核可能不支持${NC}"
-        echo -e "当前内核: $(uname -r)"
-        echo -e "BBR 需要 Linux 4.9+ 内核"
+        RMEM_MAX=67108864; WMEM_MAX=67108864; NETDEV_BUDGET=2400
+        TCP_MEM="524288 1048576 2097152"; TCP_RMEM="4096 87380 33554432"; TCP_WMEM="4096 65536 33554432"
+        BACKLOG=10000; SOMAXCONN=8192; CONNTRACK=262144
    fi
+    FILE_MAX=$((MEM_MB * 256))
+    [ $FILE_MAX -lt 65535 ] && FILE_MAX=65535
 }

-disable_bbr() {
-    echo -e "${YELLOW}正在关闭 BBR...${NC}"
-    sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf
-    sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf
-    echo "net.core.default_qdisc=pfifo_fast" >> /etc/sysctl.conf
-    echo "net.ipv4.tcp_congestion_control=cubic" >> /etc/sysctl.conf
-    sysctl -p >/dev/null 2>&1
-    echo -e "${GREEN}✓ 已恢复为 cubic${NC}"
+do_optimize() {
+    calc_buffers
+    echo -e "${GREEN}正在优化... (${MEM_MB}MB 内存方案)${NC}"
+
+    local CONF="/etc/sysctl.d/99-network-optimize.conf"
+    cat > "$CONF" << EOF
+# === BBR 拥塞控制 ===
+net.core.default_qdisc = fq
+net.ipv4.tcp_congestion_control = bbr
+
+# === 缓冲区 (基于 ${MEM_MB}MB 内存) ===
+net.core.rmem_max = ${RMEM_MAX}
+net.core.wmem_max = ${WMEM_MAX}
+net.core.rmem_default = 262144
+net.core.wmem_default = 262144
+net.ipv4.tcp_rmem = ${TCP_RMEM}
+net.ipv4.tcp_wmem = ${TCP_WMEM}
+net.ipv4.tcp_mem = ${TCP_MEM}
+net.ipv4.udp_mem = ${TCP_MEM}
+
+# === 连接队列 ===
+net.core.netdev_max_backlog = ${BACKLOG}
+net.core.somaxconn = ${SOMAXCONN}
+net.ipv4.tcp_max_syn_backlog = ${SOMAXCONN}
+
+# === TCP 快速回收 ===
+net.ipv4.tcp_tw_reuse = 1
+net.ipv4.tcp_fin_timeout = 15
+net.ipv4.tcp_keepalive_time = 300
+net.ipv4.tcp_keepalive_intvl = 30
+net.ipv4.tcp_keepalive_probes = 5
+net.ipv4.tcp_max_tw_buckets = 65535
+net.ipv4.tcp_max_orphans = 32768
+
+# === TCP 性能 ===
+net.ipv4.tcp_fastopen = 3
+net.ipv4.tcp_mtu_probing = 1
+net.ipv4.tcp_slow_start_after_idle = 0
+net.ipv4.tcp_no_metrics_save = 1
+net.ipv4.tcp_window_scaling = 1
+net.ipv4.tcp_sack = 1
+net.ipv4.tcp_timestamps = 1
+net.ipv4.tcp_ecn = 0
+net.ipv4.tcp_syncookies = 1
+net.ipv4.tcp_adv_win_scale = 2
+net.core.netdev_budget = ${NETDEV_BUDGET}
+net.core.netdev_budget_usecs = 8000
+
+# === 文件描述符 ===
+fs.file-max = ${FILE_MAX}
+fs.nr_open = ${FILE_MAX}
+
+# === 连接跟踪 ===
+net.netfilter.nf_conntrack_max = ${CONNTRACK}
+
+# === 其他 ===
+net.ipv4.ip_local_port_range = 1024 65535
+net.ipv4.ip_forward = 1
+net.ipv6.conf.all.forwarding = 1
+EOF
+
+    sysctl --system >/dev/null 2>&1
+
+    # 设置文件描述符限制
+    if ! grep -q "# network-optimize" /etc/security/limits.conf 2>/dev/null; then
+        cat >> /etc/security/limits.conf << EOF
+# network-optimize
+* soft nofile ${FILE_MAX}
+* hard nofile ${FILE_MAX}
+root soft nofile ${FILE_MAX}
+root hard nofile ${FILE_MAX}
+EOF
+    fi
+
+    # 网卡队列优化
+    if command -v ethtool &>/dev/null && [ -n "$IFACE" ]; then
+        ethtool -G "$IFACE" rx 4096 tx 4096 2>/dev/null
+        ethtool -K "$IFACE" tso on gso on gro on 2>/dev/null
+    fi
+
+    echo -e "${GREEN}✓ 优化完成！${NC}"
+    echo ""
+    show_result
+}
+
+show_result() {
+    echo -e "${CYAN}=== 优化结果 ===${NC}"
+    echo -e "BBR: ${GREEN}$(sysctl -n net.ipv4.tcp_congestion_control)${NC}"
+    echo -e "队列: $(sysctl -n net.core.default_qdisc)"
+    echo -e "TCP FastOpen: $(sysctl -n net.ipv4.tcp_fastopen)"
+    echo -e "缓冲区: rmem_max=$(( $(sysctl -n net.core.rmem_max) /1024/1024 ))MB wmem_max=$(( $(sysctl -n net.core.wmem_max) /1024/1024 ))MB"
+    echo -e "Backlog: $(sysctl -n net.core.netdev_max_backlog)"
+    echo -e "文件描述符: $(sysctl -n fs.file-max)"
+    echo -e "端口范围: $(sysctl -n net.ipv4.ip_local_port_range)"
+    echo ""
+    echo -e "${YELLOW}重启后永久生效，无需额外操作${NC}"
+}
+
+do_restore() {
+    echo -e "${YELLOW}正在恢复默认...${NC}"
+    rm -f /etc/sysctl.d/99-network-optimize.conf
+    sysctl --system >/dev/null 2>&1
+    echo -e "${GREEN}✓ 已恢复默认配置${NC}"
 }

 show_menu() {
    clear
-    echo -e "${GREEN}================================${NC}"
-    echo -e "${GREEN}    TCP BBR 一键管理脚本${NC}"
-    echo -e "${GREEN}================================${NC}"
-    show_status
-    echo "1. 开启 BBR"
-    echo "2. 关闭 BBR"
-    echo "3. 查看状态"
+    show_info
+    echo "1. 一键优化 (BBR + 内核参数 + 缓冲区)"
+    echo "2. 查看当前状态"
+    echo "3. 恢复默认配置"
    echo "0. 退出"
    echo ""
    read -p "请选择 [0-3]: " choice
    case "$choice" in
-        1) enable_bbr; show_status ;;
-        2) disable_bbr; show_status ;;
-        3) show_status ;;
+        1) do_optimize ;;
+        2) show_result ;;
+        3) do_restore ;;
        0) exit 0 ;;
        *) echo -e "${RED}无效选择${NC}" ;;
    esac
-    read -p "按回车继续..." && show_menu
+    echo ""; read -p "按回车继续..." && show_menu
 }

-check_root
-check_os
-
 case "${1:-}" in
-    enable)  enable_bbr; show_status ;;
-    disable) disable_bbr; show_status ;;
-    status)  show_status ;;
-    *)       show_menu ;;
+    optimize|enable) do_optimize ;;
+    restore|disable) do_restore ;;
+    status) show_info; show_result ;;
+    *) show_menu ;;
 esac