nginx高可用

Keepalived高可用软件介绍
keepalived是一个可以快速构建高可用服务的解决方案


Nginx主备



#yum install keepalived 

#vi /etc/keepalived/keepalived.conf

#master 主配置
! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   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_script check_nginx{
	script "[ -f /usr/local/nginx/logs/nginx.pid ] && exit 0 || exit 1"
	interval 1     
	weight -20 
}

vrrp_instance VI_1 {
    state MASTER                  #MASTER / BACKUP
    interface eth0
    virtual_router_id 51          #
    priority 100				  #优先级
    advert_int 1                  #发送心跳包间隔时间，1秒
    authentication {
        auth_type PASS
        auth_pass 1111
    }
	track_script {
		check_nginx
	}
    virtual_ipaddress {
        192.168.200.16/24         #24位掩码
        #192.168.200.17
        #192.168.200.18
    }
}

#backup  配置

! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   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_script check_nginx{
	script "[ -f /usr/local/nginx/logs/nginx.pid ] && exit 0 || exit 1"
	interval 1     
	weight -20 
}

vrrp_instance VI_1 {
    state BACKUP                  #MASTER / BACKUP
    interface eth0                #ifconfig可以查看网络接口
    virtual_router_id 51          #
    priority 90  				  #优先级
    advert_int 1                  #发送心跳包间隔时间，1秒
	track_script {
		check_nginx
	}
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.200.16/24
    }
}


systemctl  restart keepalived




nginx双主
配置1


! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   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_script check_nginx{
	script "[ -f /usr/local/nginx/logs/nginx.pid ] && exit 0 || exit 1"
	interval 1     
	weight -20 
}

vrrp_instance VI_1 {
    state MASTER                  #MASTER / BACKUP
    interface eth0
    virtual_router_id 51          #
    priority 100				  #优先级
    advert_int 1                  #发送心跳包间隔时间，1秒
    authentication {
        auth_type PASS
        auth_pass 1111
    }
	track_script {
		check_nginx
	}
    virtual_ipaddress {
        192.168.200.16/24         #24位掩码
        #192.168.200.17
        #192.168.200.18
    }
}

vrrp_instance VI_2 {
    state BACKUP                  #MASTER / BACKUP
    interface eth0
    virtual_router_id 52          #
    priority 90				  #优先级
    advert_int 1                  #发送心跳包间隔时间，1秒
    authentication {
        auth_type PASS
        auth_pass 1111
    }
	track_script {
		check_nginx
	}
    virtual_ipaddress {
        192.168.200.17/24         #24位掩码
    }
}

配置2

! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   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_script check_nginx{
	script "[ -f /usr/local/nginx/logs/nginx.pid ] && exit 0 || exit 1"
	interval 1     
	weight -20 
}

vrrp_instance VI_1 {
    state BACKUP                  #MASTER / BACKUP
    interface eth0                #ifconfig可以查看网络接口
    virtual_router_id 51          #
    priority 90  				  #优先级
    advert_int 1                  #发送心跳包间隔时间，1秒
	track_script {
		check_nginx
	}
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.200.16/24
    }
}

vrrp_instance VI_2 {
    state MASTER                  #MASTER / BACKUP
    interface eth0                #ifconfig可以查看网络接口
    virtual_router_id 52          #
    priority 100  				  #优先级
    advert_int 1                  #发送心跳包间隔时间，1秒
	track_script {
		check_nginx
	}
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.200.17/24
    }
}