Zabbix实战-简易教程（6）--Server端高可用

3.4 server前端高可用

   至此，单台Zabbix server环境已经搭建完成，为了达到高可用效果，我们需要通过2台服务器之间通过HA软件进行探测，一旦检测到主的server挂掉后，从的server会立即顶替。我们这里采用keepalived软件来实现。

具体架构参考：Zabbix实战-简易教程（2）--整体架构图

3.4.1 Keepalived安装

直接yum安装即可

Yum install keepalived

3.4.2 keepalived配置

Master上的keepalived配置如下：

【Master】

cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived
 
global_defs {
   notification_email {
     xuequn@kingsoft.com
   }
   notification_email_from zabbix@kingsoft.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
 
vrrp_script chk_zabbix_server {
 
script "/etc/keepalived/chk_zabbix_server.sh"
interval 30
weight 2
 
 
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 60
    priority 150
    advert_int 1
    mcast_src_ip 142.162.196.111
    authentication {
        auth_type PASS
        auth_pass ZabbixServer
    }
   track_script {
  
    chk_zabbix_server
 
   }
    virtual_ipaddress {
        142.162.196.116
    }
}

【Slave】slave上的配置如下:

cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived
 
global_defs {
   notification_email {
     xuequn@kingsoft.com
   }
   notification_email_from zabbix@kingsoft.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
 
vrrp_script chk_zabbix_server {
 
script "/etc/keepalived/chk_zabbix_server.sh"
interval 30
weight 2
 
 
}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 60
    priority 99
    advert_int 1
    mcast_src_ip 142.162.196.112
    authentication {
        auth_type PASS
        auth_pass ZabbixServer
    }
   track_script {
 
   chk_zabbix_server
   }
    virtual_ipaddress {
        142.162.196.116
    }
}

服务器上的检测脚本如下：

 cat /etc/keepalived/chk_zabbix_server.sh

#!/bin/bash
#
#
status1=$(ps aux|grep -w "zabbix_server" | grep -v grep | grep -v bash | wc -l)
 
if [ "${status1}" = "0" ]; then
 
        /etc/init.d/zabbix-server start
        sleep 3
 
        status2=$(ps aux|grep zabbix_server | grep -v grep | grep -v bash |wc -l)
        if [ "${status2}" = "0"  ]; then
                /etc/init.d/keepalived stop
        fi
fi

3.5 Zabbix master和slave文件同步

为了达到主从切换后，master和slave的文件一致，我们这里采用了rsync进行服务端文件实时同步。

需要同步的服务器配置【Slave】：

 

3.5.1 rsync安装

yum install rsync

3.5.2配置rsync，同步web文件和配置文件

cat rsync.conf

###################global config####################

uid = nobody

gid = nobody

 

use chroot = yes

strict modes = yes

timeout = 300

transfer logging = true

log format = %h %a %o %f %u %l %m %P

pid file = /var/run/rsyncd.pid

lock file = /var/run/rsync.lock

log file = /var/log/rsyncd.log

incoming chmod = Du=rwx,Dg=rx,Do=r,Fu=rwx,Fg=rx,Fo=r

exclude from = /etc/rsyncd/exclude_filelist

auth users = zabbixmonitor

secrets file = /etc/rsyncd/zabbixmonitor.pas

hosts allow = *

 

#####################module config###################

[zabbixweb]

path = /usr/share/zabbix/

comment = zabbixweb_log

#ignore errors

log file = /var/log/rsync/zabbixweb.log

read only = no

write only = no

list = false

uid = root

gid = root

 

#####################module config###################

[zabbixconfig]

path = /etc/zabbix/zabbix_server.conf

comment = zabbixconfig_log

#ignore errors

log file = /var/log/rsync/zabbixconfig.log

read only = no

write only = no

list = false

uid = root

gid = root

 

/usr/bin/rsync --daemon --config=/etc/rsyncd/rsync.conf

3.5.3 sersync配置

被同步的服务端【Master】

被同步端采用金山周洋同学写的sersync程序进程实施同步，这个sersync集成了rsync+inotify功能，只需在后台开启进程即可。

cd sersync/

[root@bgp-bjlg-zabbix-server01 sersync]# ll

total 1780

-rwxr-xr-x 1 root root    2214 Oct 26  2011 confxml.xml

-rwxr-xr-x 1 root root 1810128 Oct 26  2011 sersync2

-rwxr-xr-x 1 root root    2247 Jan 21 15:17 zabbixconfig.xml

-rwxr-xr-x 1 root root    2248 Jan 21 15:44 zabbixweb.xml

 

Zabbixweb.xml配置：

<sersync>
        <localpath watch="/usr/share/zabbix/">
            <remote ip="172.29.31.112" name="zabbixweb"/>
        </localpath>
        <rsync>
            <commonParams params="-artuz"/>
            <auth start="true" users="zabbixmonitor" passwordfile="/etc/rsyncd/zabbixmonitor.pas"/>
            <userDefinedPort start="false" port="874"/><!-- port=874 -->
            <timeout start="false" time="100"/><!-- timeout=100 -->
            <ssh start="false"/>
        </rsync>
        <failLog path="/tmp/rsync_fail_log.sh" timeToExecute="60"/><!--default every 60mins execute once-->
        <crontab start="false" schedule="600"><!--600mins-->
            <crontabfilter start="false">
                <exclude expression="*.php"></exclude>
                <exclude expression="info/*"></exclude>
            </crontabfilter>
        </crontab>
        <plugin start="false" name="command"/>
</sersync>

Zabbixconfig.xml配置类似。

3.5.4 启动

./sersync2 -n 2 -o zabbixconfig.xml -d

./sersync2 -n 2 -o zabbixweb.xml -d

 

3.6 配置文件和参考文献

1、server端rsync和sersync2文件地址