linux上安装keepalived+nginx

一、准备：
1：和机房沟通好，哪台机器和哪些ip需要漂移，并且保证漂移的ip，漂移后能外网访问这个漂移的ip
2：yum -y install keepalived nignx

二、主设置：

cp /etc/keepalived/keepalived.conf  keepalived.conf-back
vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]   ---三个收件的邮箱(可不动)
     [email protected]
   }
   notification_email_from [email protected]   ---发送的邮箱（可不动）
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
  #vrrp_strict       ---------注释掉，要不然ping不通vip
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

~~~~~~~~~~~~~~~~~上面其他的都可以不动~~~~~~~~~~~~~~~~~~~~~~~~~

vrrp_instance VI_1 {
    state MASTER     -------------主
    interface eth0   ---注意填写外网，网卡名称
    virtual_router_id 51
    priority 100    ------------优先级（主不用动）
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
    202.60.230.94    --vip地址可以配置一个，也可以配置多个
	202.60.230.95
	202.60.230.97

	202.60.230.99
	202.60.230.101
	202.60.230.107
    }
}

下面全面删除

三、从设置：

cp /etc/keepalived/keepalived.conf  keepalived.conf-back
vim /etc/keepalived/keepalived.conf


! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]   ---三个收件的邮箱(可不动)
     [email protected]
   }
   notification_email_from [email protected]  ---发送的邮箱（可不动）
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
  #vrrp_strict     ---------注释掉，要不然ping不通vip
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

~~~~~~~~~~~~~~~~~上面其他的都可以不动~~~~~~~~~~~~~~~~~~~~~~~~~

vrrp_instance VI_1 {
    state BACKUP   -------------从
    interface eth0   ---注意填写外网，网卡名称
    virtual_router_id 51
    priority 80      ------------优先级（比主低）
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        202.60.230.94  --vip地址可以配置一个，也可以配置多个
        202.60.230.95
        202.60.230.97

        202.60.230.99
        202.60.230.101
        202.60.230.107

    }
}

下面全面删除

四、书写脚本自我检查


vim /mnt/keep-chenk.sh

#!/bin/bash
for i in `seq 20`
do
AA=`ps -ef | grep /usr/local/nginx/sbin/nginx | grep -v grep | wc -l`
if [ $AA == 0 ];then
    systemctl stop keepalived
fi
sleep 3
done

五、启动服务
    先启动主keepalived，再启动从keepalived


六、故障处理
    列如：主keepalived的nginx挂了，自动检查就会停掉keepalived（ip会自动漂移到另外一台nginx上）
	需要把ip再漂移回来，只需启动主的nginx后再systemctl restart keepalievd就可以看到ip又漂回来了

linux上安装keepalived+nginx

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