前言：
lvs-dr模型與之前的lvs-nat模型情況基本差不多，只是網絡拓撲結構不同。
HostVS
OS：CentOS-7-x86_64
hostname:ws1
eno16777736: 10.0.0.60/8(DIP)
eno167777336:0: 10.0.0.61/32(VIP)
gateway:10.0.0.254
HostRS1
OS：CentOS-7-x86_64
hostname:ws2
eno16777736：10.0.0.101/8 (RIP1)
lo:0 10.0.0.61/32 (VIP)
gateway:10.0.0.254
HostRS2
OS：CentOS-7-x86_64
hostname:ws3
eno16777736：10.0.0.102/8(RIP2)
lo:0 10.0.0.61/32(VIP)
gateway:10.0.0.254
HostDB
OS：CentOS-7-x86_64
hostname:ws4
eno16777736: 10.0.0.202/8
gateway:10.0.0.254
時間同步：
# ntpdate cn.pool.ntp.org # hwclock --sysohc
安裝軟件：
HostDB
安裝二進制mariadb-5.5.46
詳細配置請入傳送門：http://wscto.blog.51cto.com/11249394/1783131
安裝NFS
# yum install -y nfs-utils
HostRS2
安裝nginx，注意nginx屬於epel源
# yum install-y nginx php-fpm php-mbstring php-mysql nfs-utils mariadb
HostRS1
安裝nginx，注意nginx屬於epel源
# yum install-y nginx php-fpm php-mbstring php-mysql nfs-utils mariadb
HostVS
安裝LVS的cli接口程序ipvsadm
# yum install -y ipvsadm
配置集羣
HostDB
配置mariadb
安全初始化完成後，創建discuz數據庫和discuz用戶，並授權其可遠程操作數據庫
# mysql_secure_installation # mysql -u root -p > create database discuz; > create user 'discuz'@'lodalhost' identified by '123456'; > grant all privileges on discuz.* to 'discuz'@'%' identified by '123456'; > flush privileges;
配置NFS
# mkdir /nfshare/ # ls -ld /nfshare/ drwxr-xr-x 2 root root 6 May 9 17:01 /nfshare/ # echo "/nfshare/ 10.0.0.101(rw,no_root_squash,async) 10.0.0.102(rw,no_root_squash,async)" > /etc/exports # /etc/init.d/rpcbind start Starting rpcbind: [ OK ] # /etc/init.d/nfs start Starting NFS services: [ OK ] Starting NFS quotas: [ OK ] Starting NFS mountd: [ OK ] Starting NFS daemon: [ OK ] Starting RPC idmapd: [ OK ] # chkconfig rpcbind on # chkconfig nfs on # chkconfig rpcbind --list rpcbind 0:off 1:off 2:on 3:on 4:on 5:on 6:off # chkconfig nfs --list nfs 0:off 1:off 2:on 3:on 4:on 5:on 6:off # showmount -e 127.0.0.1 Export list for 127.0.0.1: /nfshare/ 10.0.0.101,10.0.0.102 exportfs -avr 檢查設置是否正確
注意：rpcbind和nfs兩個服務啓動順序不能更換，否則會出問題
解壓discuz的程序包至/nfsshare/目錄
# mkdir /nfshare/discuz # unzip /Discuz_X3.2_SC_UTF8.zip -d /nfshare/discuz/ # ls /nfshare/discuz/ readme upload utility
HostRS1
給RS配置VIP之前先要禁止RS響應VIP的ARP請求
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
在本地迴環接口別名lo:0上配置VIP，並增添路由
ifconfig lo:0 10.0.0.61 broadcast 10.0.0.61 netmask 255.255.255.255 route add -host 10.0.0.61 dev lo:0
測試鏈接HostDB上的mariadb
# mysql -h 10.0.0.202 -u discuz -p
掛載HostDB上的NFS共享存儲目錄，屬主屬組修改爲apache
# showmount -e 172.18.64.202 Export list for 172.18.64.202: /nfshare/ 10.0.0.101,10.0.0.102 # mkdir /htdocs # ls -ld /htdocs/ drwxr-xr-x 2 root root 6 May 9 17:05 /htdocs/ # mount -t nfs 172.18.64.202:/nfshare /htdocs # ls /htdocs/ discuz # chown -R apache:apache /htdocs/discuz/
啓動php-fpm
# systemctl start php-fpm.service # ss -tnl | grep 9000
配置nginx的配置文件
# vim /etc/nginx/nginx.conf
server {
listen 80;
server_name ws2
# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
location / {
root /htdocs/discuz/upload;
index index.html index.htm index.php;
}
location ~ \.php$ {
root /htdocs/discuz/upload;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include /etc/nginx/fastcgi.conf;
}
error_page 404 /404.html;
location = /40x.html {
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
}
# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
# nginx
# ss -tnl | grep 80
LISTEN 0 128 *:80 *:*測試訪問discuz安裝頁面主機加上最後的/
# curl -I http://10.0.0.101/install/ HTTP/1.1 200 OK Server: nginx/1.6.3 Date: Mon, 09 May 2016 10:23:50 GMT Content-Type: text/html Connection: keep-alive X-Powered-By: PHP/5.4.16
HostRS2
配置同上
HostVS
配置VIP地址，並打開核心轉發功能。
# ifconfig eno16777736:0 10.0.0.61 broadcast 10.0.0.61 netmask 255.255.255.255 up # echo 1 > /proc/sys/net/ipv4/ip_forward
先使用rr調度算法，期望會話丟失情況出現，若出現會話丟失情況，改用sh調度算法再做測試，期望會話能夠保持。
# ipvsadm -A -t 10.0.0.61:80 -s rr # ipvsadm -a -t 10.0.0.61:80 -r 10.0.0.101:80 -g # ipvsadm -a -t 10.0.0.61:80 -r 10.0.0.102:80 -g # ipvsadm -Ln
測試驗證：