Nginx 配置高可用

1 安装两台服务器 到Nginx
2安装 keepalived
yum install keepalived -y
软件 安装在 etc 文件keepalived 文件下的conf配置
修改配置文件 添加检测Nginx 脚本
启动 systemctl start keepalived.service

! 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 #服务器的ID
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}

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 MASTER #备份服务器上将master 改为 BACKUP
interface eth0 #网卡 ifconfig 命令看网卡
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 {
192.168.200.16 #VRRP H 虚拟地址
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
    }
}

}

检测脚本
#!/bin/bash
A=‘ps -C nginx -no-header |wc -l’
if [ $A -eq 0];tehn
/usr/local/nginx/sbin/nginx
sleep 2
if [‘ps -C nginx --no-header |c -l’ -eq 0];then
killall keepalived
fi
fi