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Zabbix运维---zabbix server的高可用解决方案

实验环境

[root@agent ~]# cat /etc/redhat-release
CentOS release 6.7 (Final)
[root@agent ~]# sestatus
SELinux status: disabled
[root@agent ~]# /etc/init.d/iptables stop

ssh优化

GSSAPIAuthentication no

UseDNS no

本次实验一共准备了，三台机器

主机名	ip	软件环境
zabbix-server01	192.168.56.29	httpd+php+keepalived+sshpass zabbix server+agent
zabbix-server02	192.168.56.30	httpd+php+keepalived+sshpass zabbix server+agent
agent	192.168.56.99	zabbix agent+mysql

VIP规划：192.168.56.66

本文中用到了sshpass免密钥交互，也可以做ssh相互免密钥登录

zabbix server的高可用，我试过在agent配置文件中，使用VIP，发现不能正常监控，于是才有本文。

我的做法agent中的配置文件，Server和ServerActive中分别都配置了两个ip，就是为了保证，zabbix-server01宕机了，还可以把监控数据发往zabbix-server02，由于两个zabbix-server共用一个数据库，肯定不能同时往数据库写数据，于是我想到了使用keepalived来控制zabbix server的开关，做到VIP在哪，那台机器的zabbix server就启动，另外一台关闭，而zabbix的web页面使用VIP去访问

本文把zabbix数据库独立出来，为了方便做mysql高可用集群

首先在zabbix-server01

rpm -ivh http://mirrors.aliyun.com/zabbix/zabbix/3.0/rhel/6/x86_64/zabbix-release-3.0-1.el6.noarch.rpm
vim /etc/yum.repos.d/zabbix.repo
修改两处bashurl
baseurl=http://mirrors.aliyun.com/zabbix/zabbix/3.0/rhel/6/x86_64/
baseurl=http://mirrors.aliyun.com/zabbix/non-supported/rhel/6/x86_64/

因为zabbix3.0需要php5.4以上，这里安装一个php的yum源

rpm -ivh http://mirror.webtatic.com/yum/el6/latest.rpm

安装httpd和php

yum install httpd -y
yum install php55w php55w-mysql php55w-common php55w-gd php55w-mbstring php55w-mcrypt php55w-devel php55w-xml php55w-bcmath -y

安装zabbix

yum install -y zabbix-agent.x86_64 zabbix-get.x86_64 zabbix-server-mysql.x86_64 zabbix-web.noarch zabbix-web-mysql.noarch

cp -R /usr/share/zabbix/ /var/www/html/

sed -i 's#^post_max_size = 8M#post_max_size = 16M#g' /etc/php.ini
sed -i 's#^max_execution_time = 30#max_execution_time = 300#g' /etc/php.ini
sed -i 's#^max_input_time = 60#max_input_time = 300#g' /etc/php.ini
sed -i '883a date.timezone = Asia/shanghai' /etc/php.ini
sed -i '276a ServerName 127.0.0.1:80' /etc/httpd/conf/httpd.conf
scp /usr/share/doc/zabbix-server-mysql-3.0.5/create.sql.gz root@192.168.56.99:/opt

在agent上

yum install -y zabbix-agent.x86_64
yum install -y mysql-server mysql-devel mysql

/etc/init.d/mysqld start

mysql -e "create database zabbix character set utf8 collate utf8_bin;"
mysql -e "show databases;"
mysql -e "grant all on zabbix.* to zabbix@'192.168.56.%' identified by '123456';"
mysql -e "select user,host from mysql.user"
zcat /opt/create.sql.gz |mysql -uzabbix -p123456 zabbix

在zabbix-server01上

sed -i '81a DBHost=192.168.56.99' /etc/zabbix/zabbix_server.conf
sed -i '116a DBPassword=123456' /etc/zabbix/zabbix_server.conf

/etc/init.d/httpd start
/etc/init.d/zabbix-server start
/etc/init.d/zabbix-agent start

打开浏览器进行安装

安装完成后

scp /etc/zabbix/web/zabbix.conf.php root@192.168.56.30:/opt

在zabbix-server02

rpm -ivh http://mirrors.aliyun.com/zabbix/zabbix/3.0/rhel/6/x86_64/zabbix-release-3.0-1.el6.noarch.rpm

修改两处bashurl

vim /etc/yum.repos.d/zabbix.repo
baseurl=http://mirrors.aliyun.com/zabbix/zabbix/3.0/rhel/6/x86_64/
baseurl=http://mirrors.aliyun.com/zabbix/non-supported/rhel/6/x86_64/

安装httpd和php

rpm -ivh http://mirror.webtatic.com/yum/el6/latest.rpm
yum install httpd -y
yum install php55w php55w-mysql php55w-common php55w-gd php55w-mbstring php55w-mcrypt php55w-devel php55w-xml php55w-bcmath -y

安装zabbix

yum install -y zabbix-agent.x86_64 zabbix-get.x86_64 zabbix-server-mysql.x86_64 zabbix-web.noarch zabbix-web-mysql.noarch

cp -R /usr/share/zabbix/ /var/www/html/

sed -i 's#^post_max_size = 8M#post_max_size = 16M#g' /etc/php.ini
sed -i 's#^max_execution_time = 30#max_execution_time = 300#g' /etc/php.ini
sed -i 's#^max_input_time = 60#max_input_time = 300#g' /etc/php.ini
sed -i '883a date.timezone = Asia/shanghai' /etc/php.ini
sed -i '276a ServerName 127.0.0.1:80' /etc/httpd/conf/httpd.conf
sed -i '81a DBHost=192.168.56.99' /etc/zabbix/zabbix_server.conf
sed -i '116a DBPassword=123456' /etc/zabbix/zabbix_server.conf

mv /opt/zabbix.conf.php /etc/zabbix/web/
/etc/init.d/httpd start

注意：一个主机上有两个IP，限制我从那个IP地址出去取值

修改如下三处：

vi /etc/zabbix/zabbix_agentd.conf

Server=192.168.56.30,192.168.56.29
ServerActive=192.168.56.30,192.168.56.29
Hostname=192.168.56.99

修改完成如下

/etc/init.d/zabbix-agent start

在zabbix-server01和zabbix-server02上分别安装keepalived的

zabbix-server01

配置文件如下

cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL 29
}

vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}

virtual_ipaddress {
192.168.56.66
}
notify_master /opt/to_master.sh
}

cat /opt/to_master.sh
#!/bin/bash
sshpass -p 123456 ssh -o StrictHostKeyChecking=no root@192.168.56.30 "/etc/init.d/zabbix-server stop"
/etc/init.d/zabbix-server start

zabbix-server02
配置文件如下
cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL 30
}

vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}

virtual_ipaddress {
192.168.56.66
}

notify_master /opt/to_master.sh
}

[root@zabbix3 zabbix]# cat /opt/to_master.sh
#!/bin/bash
sshpass -p 123456 ssh -o StrictHostKeyChecking=no root@192.168.56.29 "/etc/init.d/zabbix-server stop"
/etc/init.d/zabbix-server start