Freeswitch 使用keepalived进行主备切换高可用部署

转载

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 [email protected]
   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 [email protected]
   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

#!/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"
}
 
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
}
save_log "本节点切换为主用状态，开始接管切换前的通话。"
fs_cli "sofia recover"
fs_cli "raloadxml"
exit 0

Freeswitch 使用keepalived进行主备切换高可用部署

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