keepalived虚拟ip无法飘逸 keepalived虚拟ip冲突

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我心依旧 2024-03-20 16:00:07

文章标签 keepalived虚拟ip无法飘逸 php 服务器 IP nginx 文章分类 运维

目前需要做一个项目需要高可用项目采用Keepalived+VIP（虚拟IP）进行一个故障转移。Keepalived和VIP的相关知识就不在这里废话介绍了介绍一下当前的高可用环境实现思路。

目前有三台服务器。分别为三台服务器上部署keepalived 进行故障转移，当用户访问虚拟IP时，其keepalived会判断其优先级，主要根据监控的相关的服务端口如

nginx 监听的端口 80

数据库服务端口 3306

php-fpm的9000端口

将优先级的进行虚拟IP（VIP）的地址漂移。使用ip a 可以查看到其绑定的虚拟IP在哪一台服务器上，或通过相关日志进行查看。

服务器相关IP配置

资源	IP
服务器1	192.168.1.101
服务器1	192.168.1.102
服务器1	192.168.1.103

步骤一先从部署或交付那边拿到配置好的虚拟IP 如：192.168.1.86

步骤二启动关键的端口服务如 ngngx php-fpm mysql

步骤三修改或新增一个keepalived的配置如 keepalived.conf

下面贴出我的配置文件

! Configuration File for keepalived

global_defs {
   notification_email {
	yuluolishang@qq.com	
   }
   notification_email_from yuluolishang@yisa.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   script_user root
   enable_script_security
   vrrp_skip_check_adv_addr
   #vrrp_strict
   #vrrp_iptables
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_script chk_mysql_port {
       script "</dev/tcp/127.0.0.1/3306" # connects and exits
       interval 1                      # check every second
       weight -20                       # default priority: -20 if connect fails
}

vrrp_script chk_php_port {
       script "</dev/tcp/127.0.0.1/9000" # connects and exits
       interval 1                      # check every second
       weight -20                       # default priority: -20 if connect fails
}

vrrp_script chk_nginx_port {
       script "</dev/tcp/127.0.0.1/80" # connects and exits
       interval 1                      # check every second
       weight -20                       # default priority: -20 if connect fails
}
vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 66
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass Feipeng$
    }
    unicast_src_ip 192.168.1.101
    unicast_peer {
        192.168.1.102
        192.168.1.103
    }
    virtual_ipaddress {
        192.168.1.86/22
    }
    track_script {
       chk_mysql_port
       chk_php_port
       chk_nginx_port
    }
   
}

配置相关说明：

state BACKUP 三台服务器都被BACKUP 角色

interface etho 这个为该服务器的网卡名称

virtual_router_id 虚拟路由这个三台服务器为同一个必须同一个

priority 100 优先级

authentication 认证密码

unicast_src_ip 广播地址 即本机IP地址

unicast_peer 广播接收地址 即另外两台服务器的IP地址

virtual_ipaddress 虚拟IP(VIP)地址 后面的/22 代表子网掩码一般与三台服务器的真实IP在同一网段中。

track_script 里面为各监控的端口脚本名称 一行写一个检测。

步骤四启动keepalived 进程启动故障转移本keepalived 为离线部署离线包目录结构如下：

keepalived虚拟ip无法飘逸 keepalived虚拟ip冲突_nginx

启动命令 /keepalived/sbin/keepalived -f /keepalived/etc/keepalived/keepalived.conf

/keepalived/sbin/keepalived -f /keepalived/etc/keepalived/keepalived.conf

步骤五验证启动

查看keepalived 进程是否有启动输入 ps aux|grep keepalived

ps aux|grep keepalived

会输出如下：

ps aux|grep keepalived
root     182037  0.0  0.0  44096   888 ?        Ss   17:13   0:00 /keepalived/sbin/keepalived  -f /keepalive/etc/keepalived/keepalived.conf
root     182038  0.1  0.0  44096  1308 ?        S    17:13   0:00 /keepalived/sbin/keepalived  -f /keepalive/etc/keepalived/keepalived.conf
root     182343  0.0  0.0 112812   968 pts/0    S+   17:13   0:00 grep --color=auto keepalive

ip a 查看当前漂移VIP 绑定情况

步骤六模拟故障比如说nginx 挂掉了

输入命令 pkill nginx

然后输入lsof -i:80 此时可以得出 nginx 服务被停掉了