nginx配置高可用的集群

上图:

 

(1)需要两台 nginx 服务器

(2)需要 keepalived

(3)需要虚拟 ip

准备工作

配置高可用的准备工作

(1)需要两台服务器,两个Linux虚拟机即可,这里是 192.168.17.129 和 192.168.17.131

(2)在两台服务器安装 nginx

(3)在两台服务器安装 keepalived

 使用 yum 命令进行安装:yum install keepalived –y

下载完成,查看keepalived被默认安装的位置:在/etc/keepalived下存在一个配置文件,

之后我们围绕这个配置文件的修改展开讲解

! Configuration File for keepalived

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
   vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.200.16
        192.168.200.17
        192.168.200.18
    }
}

virtual_server 192.168.200.100 443 {
    delay_loop 6
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP

    real_server 192.168.201.100 443 {
        weight 1
        SSL_GET {
            url {
              path /
              digest ff20ad2481f97b1754ef3e12ecd3a9cc
            }
            url {
              path /mrtg/
              digest 9b3a0c85a887a256d6939da88aabd8cd
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

virtual_server 10.10.10.2 1358 {
    delay_loop 6
    lb_algo rr 
    lb_kind NAT
    persistence_timeout 50
    protocol TCP

    sorry_server 192.168.200.200 1358

    real_server 192.168.200.2 1358 {
        weight 1
        HTTP_GET {
            url { 
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url { 
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url { 
              path /testurl3/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.200.3 1358 {
        weight 1
        HTTP_GET {
            url { 
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334c
            }
            url { 
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334c
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

virtual_server 10.10.10.3 1358 {
    delay_loop 3
    lb_algo rr 
    lb_kind NAT
    persistence_timeout 50
    protocol TCP

    real_server 192.168.200.4 1358 {
        weight 1
        HTTP_GET {
            url { 
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url { 
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url { 
              path /testurl3/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.200.5 1358 {
        weight 1
        HTTP_GET {
            url { 
              path /testurl/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url { 
              path /testurl2/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            url { 
              path /testurl3/test.jsp
              digest 640205b7b0fc66c1ea91c463fac6334d
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

 两台服务器的keepalived的配置究竟怎么修改,这里没有讲解...........................................以后可能会有,兄弟们可以绕道了

配置文件修改

1.分别修改/etc/keepalived/keepalivec.conf 配置文件,下面给出129服务器的一个示例。131服务器的自行仿照修改。

配置文件大致分为3块儿,全局的,脚本的,主从服务器以及虚拟IP的配置

global_defs {

notification_email {

acassen@firewall.loc

failover@firewall.loc

sysadmin@firewall.loc

}

notification_email_from Alexandre.Cassen@firewall.loc

smtp_server 192.168.17.129

smtp_connect_timeout 30

router_id LVS_DEVEL #访问到的Linux服务器主机名字,在/etc/hosts文件当中添加

}

vrrp_script chk_http_port {
script "/usr/local/src/nginx_check.sh"

interval 2    #(检测脚本执行的间隔)

weight 2

}

vrrp_instance VI_1 {

state BACKUP    # 备份服务器上将 MASTER 改为 BACKUP

interface ens33    //网卡

virtual_router_id 51    # 主、备机的 virtual_router_id 必须相同

priority 100    # 主、备机取不同的优先级,主机值较大,备份机值较小

advert_int 1

authentication {

auth_type PASS


auth_pass 1111

}

virtual_ipaddress {

192.168.17.50 // VRRP H 虚拟地址

}

}

 

2.在/usr/local/src 添加检测脚本,检测nginx是否存活。

#!/bin/bash

A=`ps -C nginx –no-header |wc -l`

if [ $A -eq 0 ];then

/usr/local/nginx/sbin/nginx

sleep 2

if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then

killall keepalived

fi

fi

3.把两台服务器上 nginx 和 keepalived 启动

启动 nginx:./nginx

启动 keepalived:systemctl start keepalived.service

最终测试

在浏览器地址栏输入 虚拟 ip 地址 192.168.17.50,证明虚拟IP可以正常访问

另外,可以查看现在主nginx服务器已经绑定到了该虚拟IP。

这个时候我们即使停止主服务器192.168.17.129.浏览器依然可以正常访问虚拟IP。

服务停止命令

systemctl stop keepalived.service

./nginx -s stop

会将虚拟IP绑定到从ngnix服务器上,自动切换到从服务器正常访问nginxf服务器。

posted @ 2020-08-01 15:22  月半大熊猫  阅读(450)  评论(0编辑  收藏  举报