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琚帶绔?- 淇 MTU 闂锛氬す MSS + 璺緞 MTU 鎺㈡祴锛堝叕缃戝彲鐢ㄧ巼 48% -> 100%锛?- 澶嶇敤 HTTP 杩炴帴锛堝厤鎺夋瘡娆℃柊寤?TLS 鐨?30% 鎻℃墜澶辫触锛?- 姣忓垎閽熷洖澶存壘灞€鍩熺綉锛岃嚜鍔ㄥ垏鍥炲揩 400 鍊嶇殑璺緞
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鎵嬭〃绔?- 鍐呯疆 GTS Root R4 / GlobalSign Root CA锛屼慨 SSLHandshakeException
- 杩炴帴閿欒缈昏瘧鎴愪汉璇濓紙璇佷功/鏃堕棿/瑙f瀽/瓒呮椂鍒嗗埆鎻愮ず锛?- 缁忎腑杞繛涓婂悗鐢ㄦ湇鍔″櫒鎶ョ殑鍦板潃鍒锋柊宸查厤瀵硅褰?- 鏂板灞€鍩熺綉杩炴帴椤甸潰銆佹湇鍔″櫒寤惰繜妫€娴?
鏈嶅姟鍣ㄧ
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- 绠$悊椤碉細鎵归噺鍒犻櫎銆佺綉缁滀綋妫€銆佷笅杞藉尯
- 闅ч亾鏀?HTTP/2 + 鍙岃繛鎺?
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xmz7891
2026-10-06 19:01:05 +08:00
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#!/bin/bash
# 查为什么轻负载 OK、密集请求就 502/530。
#
# 现象:
# 每 2 秒打一次健康检查 -> 15/15 全通
# e2e 测试(密集请求 + 长轮询 + 256KB)-> 全 502/530
#
# 502 = Cloudflare 到不了源站;530 = 源站 DNS 错误。
# 但源站就是本机 127.0.0.1:8080 —— 那说明 cloudflared 自己的连接掉了。
set -u
RELAY_DIR=/root/lanremote-relay
URL=https://relay.xxmxxs.top
echo "===== 1. 隧道当前状态 ====="
echo " 服务: $(systemctl is-active lanremote-tunnel)"
echo " 已注册连接: $(grep -c 'Registered tunnel connection' $RELAY_DIR/tunnel.log 2>/dev/null || echo 0)"
echo " 连接断开: $(grep -c 'Connection terminated' $RELAY_DIR/tunnel.log 2>/dev/null || echo 0)"
echo " quic 错误: $(grep -c 'Failed to dial a quic' $RELAY_DIR/tunnel.log 2>/dev/null || echo 0)"
echo
echo " 日志最近 6 行:"
tail -6 "$RELAY_DIR/tunnel.log" 2>/dev/null | sed 's/^/ /'
echo
echo "===== 2. 轻负载(每 2 秒一次,10 次)====="
OK=0
for i in $(seq 1 10); do
C=$(timeout 20 curl -4 -s -o /dev/null -w '%{http_code}' -H 'User-Agent: LanRemote/1.4.0' "$URL/v1/health" 2>/dev/null)
[ "$C" = "200" ] && OK=$((OK+1))
printf " %2d: %s\n" "$i" "${C:-超时}"
sleep 2
done
echo " 轻负载 $OK/10"
echo
echo "===== 3. 密集负载(不间隔,20 次)====="
DOK=0
for i in $(seq 1 20); do
C=$(timeout 20 curl -4 -s -o /dev/null -w '%{http_code}' -H 'User-Agent: LanRemote/1.4.0' "$URL/v1/health" 2>/dev/null)
[ "$C" = "200" ] && DOK=$((DOK+1))
printf " %2d: %s\n" "$i" "${C:-超时}"
done
echo " 密集负载 $DOK/20"
echo
echo "===== 4. 大包(256KB 上传)====="
head -c 262144 /dev/zero | tr '\0' 'A' > /tmp/big.bin
C=$(timeout 60 curl -4 -s -o /dev/null -w '%{http_code}' \
-H 'User-Agent: LanRemote/1.4.0' \
-X POST --data-binary @/tmp/big.bin "$URL/v1/admin/devices" 2>/dev/null)
echo " 256KB POST: HTTP ${C:-超时}"
rm -f /tmp/big.bin
echo
echo "===== 5. 大包之后隧道还活着吗 ====="
echo " 已注册连接: $(grep -c 'Registered tunnel connection' $RELAY_DIR/tunnel.log 2>/dev/null || echo 0)"
echo " 连接断开: $(grep -c 'Connection terminated' $RELAY_DIR/tunnel.log 2>/dev/null || echo 0)"
echo
echo " 日志最近 8 行:"
tail -8 "$RELAY_DIR/tunnel.log" 2>/dev/null | sed 's/^/ /'
echo
echo "===== 6. 源站(本地)在同一时刻的表现 ====="
LOK=0
for i in $(seq 1 20); do
C=$(timeout 8 curl -s -o /dev/null -w '%{http_code}' http://127.0.0.1:8080/v1/health)
[ "$C" = "200" ] && LOK=$((LOK+1))
done
echo " 本地源站 $LOK/20"
echo
echo "===== 7. 结论 ====="
echo " 轻负载 $OK/10 密集 $DOK/20 本地 $LOK/20"
if [ "$LOK" -ge 19 ] && [ "$DOK" -lt 10 ]; then
echo " -> 源站没问题,是**隧道在密集请求下扛不住**"
echo " 这条 4G 线路的带宽/丢包撑不住高并发。"
echo " 客户端本身的失败重试就是关键(被控端/手表都有)。"
elif [ "$LOK" -lt 15 ]; then
echo " -> 源站也有问题,去看 relay.log"
fi