Freeswitch 使用keepalived进行主备切换高可用部署

拼搏现实的明天。 2022-03-02 15:05 713阅读 0赞

转载

[https://blog.51cto.com/908405/2176392][https_blog.51cto.com_908405_2176392]

reeSWITCH的高可用部署方式有两种：主备切换和负载均衡，官方文档介绍的主备切换部署是采用Corosync & Pacemaker，负载均衡采用前置opensips。但对使用keepalived进行主备切换的高可用方式没有介绍，同时网上对该种部署方式也没有介绍。

本人对Corosync & Pacemaker不熟悉，目前在职的公司web应用大部分采用keepalived+haproxy，所以对keepalived稍微熟悉一点，因此尝试使用keepalived进行freeswitch进行主备切换的高可用部署。

使用keepalived进行freeswitch进行主备切换的高可用部署比较简单，本文介绍的部署方案有两个亮点（自以为）：1、主节点不抢占VIP，否则可能导致主节点恢复后VIP切换导致正在交互的SIP信令处理失败；2、FS可用性检测脚本和主备切换后话务接管脚本。

**一、前提**

1、freeswicth和keepalived均能通过服务启动；                       ——通过apt安装freeswitch和keepalived即可通过服务启动

2、两个节点freeswitch连接同一个pgsql或者mysql数据库；      ——当然也可以是其他外部数据库

**二、环境**

os：debian 8

A节点IP：172.16.100.10

B节点IP：172.16.100.11

VIP：172.16.100.12

freeswitch域名：sofia.superpipi.cn  ——域名也可以直接使用VIP

**三、配置**

**3.1 允许应用绑定非本机IP**

在两个节点均执行以下命令：

echo 'net.ipv4.ip_nonlocal_bind=1' >> /etc/sysctl.conf
    sysctl -p

**3.2 配置freeswitch**

修改“/usr/local/freeswitch/conf/vars.xml ” ——具体路径视实际情况

将“local\_ip\_v4”的值修改为VIP：“172.16.100.12”

将“domain”的值修改为：“sofia.superpipi.cn”

**3.3 配置keepalived**

keepalived默认配置文件路径“/etc/keepalived/keepalived.conf ”

**A节点keepalived配置：**

! Configuration File for keepalived
    global_defs {
       notification_email {
         acassen
       }
       notification_email_from Alexandre.Cassen@firewall.loc
       smtp_server 172.16.100.251
       smtp_connect_timeout 30
       router_id LVS_DEVEL
    }
    vrrp_script check_fs {
        script "/etc/keepalived/script/check_fs.sh"
        interval 1
        weight 2
    }
    vrrp_instance VI_1 {
        state BACKUP
        interface eth0
        garp_master_delay 10
        smtp_alert
        virtual_router_id 51
        priority 100
        nopreempt  #主节点不抢占VIP
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        track_script {
            check_fs
        }
        virtual_ipaddress {
            172.16.100.12/24
            172.16.100.12/24 label eth0:1
        }
        notify_master "/etc/keepalived/script/fs_recover.sh"
    }

**B节点keepalived配置：**

! Configuration File for keepalived
    global_defs {
       notification_email {
         acassen
       }
       notification_email_from Alexandre.Cassen@firewall.loc
       smtp_server 172.16.100.251
       smtp_connect_timeout 30
       router_id LVS_DEVEL
    }
    vrrp_script check_fs {
        script "/etc/keepalived/script/check_fs.sh"
        interval 1
        weight 2
    }
    vrrp_instance VI_1 {
        state BACKUP
        interface eth0
        garp_master_delay 10
        smtp_alert
        virtual_router_id 51
        priority 50
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 1111
        }
        
        track_script {
            check_fs
        }
        virtual_ipaddress {
            172.16.100.12/24
            172.16.100.12/24 label eth0:1
        }
        notify_master "/etc/keepalived/script/fs_recover.sh"
    }

**3.4 检测脚本**

检测脚本路径：

mkdir -p /etc/keepalived/script/

**检测可用性脚本**

vim /etc/keepalived/script/check_fs.sh

#!/bin/sh
    
    FS_CLI_PROG='/usr/local/freeswitch/bin/fs_cli'
    FS_CLI_HOST='127.0.0.1'
    FS_CLI_PORT='8021'
    FS_CLI_PASS='ClueCon'
    PROFILES='sofia.superpipi.cn'
    VIP='172.16.100.12'
    
    fs_cli() {
      $FS_CLI_PROG -H $FS_CLI_HOST -P $FS_CLI_PORT -p $FS_CLI_PASS -x "$1"
    }
    
    sofia_profile_started() {
      fs_cli "sofia xmlstatus" | grep "<name>$1</name>" | wc -l
    }
    
    save_log(){
    count=1
    str_tmp="`date +%Y-%m-%d_%H:%M:%S` "
    while [ $# -ge 1 ];do
    str_tmp="$str_tmp $1"
    count=count+1
    shift
    done
    echo $str_tmp >>/var/log/check_fs_`date +%Y-%m-%d`.log
    }
    
    check_vrrp(){
    ip a|grep $VIP|wc -l
    }
    
    check_fs_service(){
    ps -ef |grep freeswitch.service|grep -v 'grep'|wc -l
    }
    
    #     fs_cli "sofia recover"
    for p in $PROFILES; do
       if [ `sofia_profile_started "$p"` -eq 0 ]; then
         # echo "$p DOWN"
         log_str="$p DOWN"
         save_log $log_str
         if [ `check_vrrp` -eq 1 ];then
             save_log "本机已经绑定VRRP，即将重启keepalived和FreeSWITCH。"
             service keepalived restart
             save_log "vrrp切换完成！"
             if [ `check_fs_service` -eq 1 ];then
                 save_log "freeswitch服务正在操作中。"
             else
                service freeswitch restart
                save_log "freeswitch重启成功！"
             fi
         else
             if [ `check_fs_service` -eq 1 ];then
                 save_log "freeswitch服务正在操作中。 "
             else
                 save_log "本机没有绑定VRRP，重启FreeSWITCH。"
                 service freeswitch restart
                 save_log "freeswitch重启成功！"
             fi
         fi
         exit 1
      fi
    done
    save_log "freeswitch状态检测:OK!"
    #echo "OK"
    exit 0

**切换为主节点后恢复通话脚本**

vim /etc/keepalived/script/fs_recover.sh

[https_blog.51cto.com_908405_2176392]: https://blog.51cto.com/908405/2176392