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
