freeswitch使用hiredis的limit功能

概述

freeswitch是一款简单好用的VOIP开源软交换平台。

之前写过一篇关于limit的文章“freeswwitch通过limit限制cps”，主要是介绍了limit的hash后端模式限制cps。

本文档主要介绍limit的hiredis后端模式。

hash后端模式和hiredis的后端模式，二者的功能是一致的，主要区别在于hash更快，hiredis更持久更容易集群化。

环境

CentOS 7.9

freeswitch 1.10.7

模块支持

要使用limit的hiredis模式，首先要启动mod_hiredis模块。

编译安装mod_hiredis模块需要先安装hiredis依赖库。

git clone https://github.com/redis/hiredis.git

cd hiredis

make

make install

cp -f /usr/local/lib/libhiredis.so /usr/lib64/libhiredis.so

cp -f /usr/local/lib/pkgconfig/hiredis.pc /usr/lib64/pkgconfig/hiredis.pc

在freeswitch源码根目录下执行配置命令，重新生成mod_hiredis目录下的makefile。

cd freeswitch-1.10.7

./bootstrap.sh -j

./configure

cd src/mod/applications/mod_hiredis/

make

make install

查看/usr/local/freeswitch/mod目录下的mod_hiredis模块。

-rwxr-xr-x. 1 root root 111184 Apr 11 09:37 mod_hiredis.so

-rwxr-xr-x. 1 root root 1320 Apr 11 09:37 mod_hiredis.la

配置

配置modules.conf.xml文件。

<load module="mod_hiredis"/>

配置hiredis.conf.xml文件。

<configuration name="hiredis.conf" description="mod_hiredis">

<profiles>

<profile name="default">

<connections>

<connection name="primary">

<param name="hostname" value="10.55.55.136"/>

<param name="port" value="7777"/>

<param name="timeout_ms" value="500"/>

</connection>

</connections>

<params>

<param name="ignore-connect-fail" value="true"/>

</params>

</profile>

</profiles>

</configuration>

启动fs，查看mod_hiredis模块正常启动。

配置dialplan，增加limit。

<action application="limit" data="hiredis default CAP:all 8192 !EXCHANGE_ROUTING_ERROR" />

<action application="limit" data="hiredis default CAP:SIPP:${appid}:${sippNum} 8192 !EXCHANGE_ROUTING_ERROR"/>

测试

fs命令测试。

freeswitch@as137> limit_usage hiredis default test1

2025-04-22 17:38:51.159794 [DEBUG] hiredis_profile.c:61 hiredis: waiting for [10.55.55.136, 7777]

2025-04-22 17:38:51.159794 [INFO] hiredis_profile.c:86 hiredis: recycled from pool[10.55.55.136, 7777]

2025-04-22 17:38:51.159794 [DEBUG] hiredis_profile.c:206 hiredis: get test1

1

2025-04-22 17:38:51.159794 [DEBUG] hiredis_profile.c:52 hiredis: release back to pool [10.55.55.136, 7777]

发起呼叫测试。

EXECUTE sofia/external/10011@10.55.55.138 limit(hiredis default CAP:all 8192 !EXCHANGE_ROUTING_ERROR)

2025-04-22 17:47:54.879729 [DEBUG] switch_limit.c:126 incr called: default_CAP:all max:8192, interval:0

2025-04-22 17:47:54.879729 [DEBUG] hiredis_profile.c:61 hiredis: waiting for [10.55.55.136, 7777]

2025-04-22 17:47:54.879729 [INFO] hiredis_profile.c:86 hiredis: recycled from pool[10.55.55.136, 7777]

2025-04-22 17:47:54.879729 [DEBUG] hiredis_profile.c:206 hiredis: incr CAP:all

2025-04-22 17:47:54.879729 [DEBUG] hiredis_profile.c:52 hiredis: release back to pool [10.55.55.136, 7777]

EXECUTE sofia/external/10011@10.55.55.138 limit(hiredis default CAP:SIPP:e5c60abcefd840be8dff4f9a94cb46ec:10011 8192 !EXCHANGE_ROUTING_ERROR)

2025-04-22 17:47:54.879729 [DEBUG] switch_limit.c:126 incr called: default_CAP:SIPP:e5c60abcefd840be8dff4f9a94cb46ec:10011 max:8192, interval:0

2025-04-22 17:47:54.879729 [DEBUG] hiredis_profile.c:61 hiredis: waiting for [10.55.55.136, 7777]

2025-04-22 17:47:54.879729 [INFO] hiredis_profile.c:86 hiredis: recycled from pool[10.55.55.136, 7777]

2025-04-22 17:47:54.879729 [DEBUG] hiredis_profile.c:206 hiredis: incr CAP:SIPP:e5c60abcefd840be8dff4f9a94cb46ec:10011

2025-04-22 17:47:54.879729 [DEBUG] hiredis_profile.c:52 hiredis: release back to pool [10.55.55.136, 7777]

2025-04-22 17:48:04.819741 [DEBUG] hiredis_profile.c:61 hiredis: waiting for [10.55.55.136, 7777]

2025-04-22 17:48:04.819741 [INFO] hiredis_profile.c:86 hiredis: recycled from pool[10.55.55.136, 7777]

2025-04-22 17:48:04.819741 [DEBUG] hiredis_profile.c:206 hiredis: decr CAP:SIPP:e5c60abcefd840be8dff4f9a94cb46ec:10011

2025-04-22 17:48:04.819741 [DEBUG] hiredis_profile.c:52 hiredis: release back to pool [10.55.55.136, 7777]

2025-04-22 17:48:04.819741 [DEBUG] hiredis_profile.c:61 hiredis: waiting for [10.55.55.136, 7777]

2025-04-22 17:48:04.819741 [INFO] hiredis_profile.c:86 hiredis: recycled from pool[10.55.55.136, 7777]

2025-04-22 17:48:04.819741 [DEBUG] hiredis_profile.c:206 hiredis: decr CAP:all

2025-04-22 17:48:04.819741 [DEBUG] hiredis_profile.c:52 hiredis: release back to pool [10.55.55.136, 7777]

总结

limit的hiredis模式受限于hiredis只能连接单体redis，但是最近测试了redis代理（predixy）可以直接转发到redis cluster。大大扩展了hiredis的能力边界。

性能和稳定性需要进一步的压测。

空空如常

求真得真