??一、?地址規劃

??????? nginx1-10.1.1.2

??????? nginx2-10.1.1.3

??????? vip-10.1.1.4

??? 修改兩臺主機名：hostnamectl set-hostname nginx1

???????????????????????????? hostnamectl set-hostname nginx2

??二、在nginx1和nginx2上分別安裝nginx，這里用的是最新的穩定版

?? 先安裝依賴包

?? yum -y install gcc gcc++ prce pcre-devel zlib zlib-devel openssl openssl-devel

??? 官網下載nginx-1.10.3源碼包

??? tar xzvf nginx-1.10.3.tar.gz?
?? mkdir -p /usr/local/nginx
?? mv nginx-1.10.3 /usr/local/
??? cd /usr/local/nginx-1.10.3/
? ./configure --prefix=/usr/local/nginx
?? make && make install

? 安裝后注冊nginx服務，使其可以開機啟動
?? vi /lib/systemd/system/nginx.service
? [Unit]
? Description=nginx
? After=network.target
?
? [Service]
? Type=forking
? ExecStart=/usr/local/nginx/sbin/nginx
? ExecReload=/usr/local/nginx/sbin/nginx -s reload
? ExecStop=/usr/local/nginx/sbin/nginx -s quit
? PrivateTmp=true
?
? [Install]
? WantedBy=multi-user.target

??設置nginx開機啟動命令： systemctl enable nginx

?? 啟動nginx systemctl start nginx

?三、分別在nginx1-2上安裝keepalived

?centos7可以直接yum安裝keepalived,注意配置文件和腳本，否則不成功

keepalived -v
Keepalived v1.2.13 (11/05,2016) 版本信息

??yum -y install keepalived
? mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.orginal
??vi /etc/keepalived/keepalived.conf

? nginx1-master配置文件如下（為了方便你的粘貼就不上截圖了）：
?more /etc/keepalived/keepalived.conf （nginx1-master）

! Configuration file for keepalived
global_defs {
?? notification_email {
??? admin@wf.com
??????? }
?? notification_email_from admin@wf.com
?? smtp_server 127.0.0.1
?? smtp_connect_timeout 30
?? router_id LVS_DEVEL
}
#監控nginx
vrrp_script chk_nginx {
??? script "/etc/keepalived/script/monitor_nginx.sh"
??? interval 2
??? weight 2
}

vrrp_instance VI_1 {
??? state MASTER? #主從設置 MASTER
??? interface eth1? #網卡名
??? virtual_router_id 51
??? mcast_src_ip 10.1.1.2 #本機ip
??? priority 51? #從機小于主機
??? advert_int 1
??? authentication {
??????? auth_type PASS
??????? auth_pass chtopnet
??? }
??? virtual_ipaddress {
??????? 10.1.1.4? #VIP 的IP
??? }
??? track_script {
??????? chk_nginx? #檢測腳本
??? }

}

virtual_server 10.1.1.4 80 {
??? delay_loop 6
??? lb_algo rr
??? lb_kind DR
??? persistence_timeout 50
??? protocol TCP

??? real_server 10.1.1.2 80 {
??????? weight 3
??????? TCP_CHECK {
??????????? connect_timeout 10
??????????? nb_get_retry 3
??????????? delay_before_retry 3
??????????? connect_port 80
??????? }
??? }?

nginx2-backup配置文件如下：

more /etc/keepalived/keepalived.conf （nginx1-backup）

! Configuration file for keepalived
global_defs {
?? notification_email {
??? admin@wf.com
??????? }
?? notification_email_from admin@wf.com
?? smtp_server 127.0.0.1
?? smtp_connect_timeout 30
?? router_id LVS_DEVEL
}
#監控NGINX
vrrp_script chk_nginx {
??? script "/etc/keepalived/script/monitor_nginx.sh"
??? interval 2
??? weight 2
}

vrrp_instance VI_1 {
??? state BACKUP? #主從設置 MASTER
??? interface eth1? #網卡名
??? virtual_router_id 50
??? mcast_src_ip 10.1.1.2 #本機ip
??? priority 50? #從機小于主機
??? advert_int 1
??? authentication {
??????? auth_type PASS
??????? auth_pass chtopnet
??? }
??? virtual_ipaddress {
??????? 10.1.1.4? #VIP 的IP
??? }
??? track_script {
??????? chk_nginx? #檢測腳本
??? }

}

virtual_server 10.1.1.4 80 {
??? delay_loop 6
??? lb_algo rr
??? lb_kind DR
??? persistence_timeout 50
??? protocol TCP

??? real_server 10.1.1.2 80 {
??????? weight 3
??????? TCP_CHECK {
??????????? connect_timeout 10
??????????? nb_get_retry 3
??????????? delay_before_retry 3
??????????? connect_port 80
??????? }
??? }
??? real_server 10.1.1.3 80 {
??????? weight 3
??????? TCP_CHECK {
??????????? connect_timeout 10
??????????? nb_get_retry 3
??????????? delay_before_retry 3
??????????? connect_port 80
??????? }
??? }
}
監測腳本如下（nginx1-2相同）：

??more /etc/keepalived/monitor_nginx.sh

?#!/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
??????? systemctl stop keepalived
??? fi
fi

?hostnamectl set-hostname nginx2
# 安裝ipvsadm ()

# ?yum install ipvsadm

在兩臺nginx分別執行腳本，綁定虛擬IP，抑制ARP廣播

?

#!/bin/bash
#description: Config realserver

VIP=10.1.1.4
?
/etc/rc.d/init.d/functions
?
case "$1" in
start)
?????? /sbin/ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP
?????? /sbin/route add -host $VIP dev lo:0
?????? echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
?????? echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
?????? echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
?????? echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
?????? sysctl -p >/dev/null 2>&1
?????? echo "RealServer Start OK"
?????? ;;
stop)
?????? /sbin/ifconfig lo:0 down
?????? /sbin/route del $VIP >/dev/null 2>&1
?????? echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
?????? echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
?????? echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
?????? echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
?????? echo "RealServer Stoped"
?????? ;;
*)
?????? echo "Usage: $0 {start|stop}"
?????? exit 1
esac
?
exit 0

?

???

?

轉載于:https://blog.51cto.com/dadloveu/1905001

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