知识库

一、FRP基础信息

二、FRP状态检查

1. 检查FRP进程状态

ps aux | grep frp

预期输出：应该看到 frpc 进程正在运行

2. 检查网络连接状态

netstat -antp | grep <端口号>

预期输出：应该看到 ESTABLISHED 状态的连接

3. 检查FRP服务状态

systemctl status frpc

预期输出：Active: active (running)

三、连接状态查询

1. 查看实时日志

tail -f <日志文件路径>

2. 查询指定时间段连接状态

grep "2026/03/14 01:" <日志文件路径> | grep -iE 'disconnect|close|error|failed|lost|reconnect'

3. 统计断开次数

grep "2026/03/14 0[1-5]:" <日志文件路径> | grep -iE 'work connection closed' | wc -l

4. 按小时统计断开情况

grep "2026/03/14 0[1-5]:" <日志文件路径> | grep -iE 'work connection closed' | awk '{print $2}' | cut -d: -f1 | sort | uniq -c

四、重连时间分析

1. 查看断开和重连记录

grep "2026/03/14 0[1-5]:" <日志文件路径> | grep -E 'work connection closed|login to server success'

2. Python脚本计算重连时间

cat > /tmp/calc_reconnect_time.py << 'SCRIPT'
import re
from datetime import datetime

log_file = '<日志文件路径>'

with open(log_file, 'r') as f:
    lines = f.readlines()

disconnect_times = []
reconnect_times = []

for line in lines:
    if '2026/03/14 0[1-5]:' in line:
        match = re.match(r'(\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2})', line)
        if match:
            time_str = match.group(1)
            time_obj = datetime.strptime(time_str, '%Y/%m/%d %H:%M:%S')
            
            if 'work connection closed' in line:
                disconnect_times.append(time_obj)
            elif 'login to server success' in line:
                reconnect_times.append(time_obj)

print("断开时间\t\t\t重连成功时间\t\t\t耗时(秒)")
print("=" * 80)

total_disconnect = 0
total_reconnect_time = 0
max_time = 0
min_time = 999999

for i, disconnect_time in enumerate(disconnect_times):
    for reconnect_time in reconnect_times:
        if reconnect_time >= disconnect_time:
            time_diff = (reconnect_time - disconnect_time).total_seconds()
            if time_diff <= 120:
                print(f"{disconnect_time}\t{reconnect_time}\t{time_diff:.0f}秒")
                total_disconnect += 1
                total_reconnect_time += time_diff
                max_time = max(max_time, time_diff)
                min_time = min(min_time, time_diff)
                break
    if total_disconnect >= 20:
        break

print("=" * 80)
if total_disconnect > 0:
    print(f"\n统计结果:")
    print(f"总断开次数: {total_disconnect}")
    print(f"平均重连时间: {total_reconnect_time/total_disconnect:.2f}秒")
    print(f"最长重连时间: {max_time:.0f}秒")
    print(f"最短重连时间: {min_time:.0f}秒")
SCRIPT

python3 /tmp/calc_reconnect_time.py

五、故障排查

1. FRP无法启动

# 检查配置文件
cat <配置文件路径>

# 手动启动测试
<FRP客户端路径> -c <配置文件路径>

2. 连接频繁断开

# 查看最近断开记录
tail -100 <日志文件路径> | grep -iE 'disconnect|close|error'

# 检查网络连通性
ping <服务器IP>

# 检查端口连通性
telnet <服务器IP> <端口号>

3. 重启FRP服务

# 使用systemctl重启
sudo systemctl restart frpc

# 或手动重启
sudo pkill frpc
nohup <FRP客户端路径> -c <配置文件路径> > <日志文件路径> 2>&1 &

六、FRP配置优化

当前配置参数

查看完整配置

cat <配置文件路径>

七、监控指标参考

正常指标范围

• 重连时间 < 2秒
• 每小时断开 < 3次
• 连接状态：ESTABLISHED
• 进程状态：running

异常指标阈值

• 重连时间 > 5秒
• 每小时断开 > 10次
• 连接状态：CLOSE_WAIT
• 进程状态：stopped

八、常用命令速查

九、总结