Zabbix運維---zabbix server的高可用解決方案

本文轉載自查看原文 2020-10-11 15:06 1113 Linux 企業運維

實驗環境

[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優化

GSSAPIAuthentication no

UseDNS no

本次實驗一共准備了，三台機器

主機名	ip	軟件環境
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規划：192.168.56.66

本文中用到了sshpass免密鑰交互，也可以做ssh相互免密鑰登錄

zabbix server的高可用，我試過在agent配置文件中，使用VIP，發現不能正常監控，於是才有本文。

我的做法agent中的配置文件，Server和ServerActive中分別都配置了兩個ip，就是為了保證，zabbix-server01宕機了，還可以把監控數據發往zabbix-server02，由於兩個zabbix-server共用一個數據庫，肯定不能同時往數據庫寫數據，於是我想到了使用keepalived來控制zabbix server的開關，做到VIP在哪，那台機器的zabbix server就啟動，另外一台關閉，而zabbix的web頁面使用VIP去訪問

本文把zabbix數據庫獨立出來，為了方便做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
修改兩處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/

因為zabbix3.0需要php5.4以上，這里安裝一個php的yum源

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

安裝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

安裝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

打開瀏覽器進行安裝

安裝完成后

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

修改兩處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/

安裝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

安裝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：一個主機上有兩個IP，限制我從那個IP地址出去取值

修改如下三處：

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上分別安裝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