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Web集群部署（Nginx+Keepalived+Varnish+LAMP+NFS）
Web集群部署（Nginx+Keepalived+Varnish+LAMP+NFS）
一、服务介绍
1.1 Nginx服务
Nginx是一个高性能的HTTP和反向代理服务器，也是一个支持IMAP/POP3/SMTP的代理服务器。Nginx即支持Web服务正向代理，也支持反向代理，尤其是反向代理功能十分强大。Nginx支持缓存功能，负载均衡，FASTCGI协议，支持第三方模块。时下Nginx的Web反向代理功能非常流行。
1.2 Keepalived
Keepalived见名知意，即保持存活，其目的是解决单点故障，当一台服务器宕机或者故障时自动切换到其他的服务器中。Keepalived是基于VRRP协议实现的。VRRP协议是用于实现路由器冗余的协议，VRRP协议将两台或多台路由器设备虚拟成虚拟设备，可以对外提供虚拟路由器IP(一个或多个)，即漂移（VIP）。用户通过VIP访问WEB访问。
1.3 Varnish
Varnish Cache是一个Web 应用加速器，也是一个知名的反向代理程序。你可以把它安装在任
何http服务器的前端，同时对它进行配置来缓存内容。varnish真的很快，单台代理的分发速度可以达到300 - 1000x，当然这也依赖于你架构。
1.4 Httpd
Httpd是一个高性能的Web服务器，也被称为Apache。Httpd支持很多的功能，拥有大量的模块，可以实现大量的功能。Httpd支持CGI（Common Gataway Interface）协议，支持反向代理，支持负载均衡，支持大量第三方模块。本文将Httpd作为Web静态服务器以及支持php的动态服务器。
1.5 Mariadb
Mariadb是多用户，多线程的SQL数据库服务器。它是C/S架构，即client/server，客服端/服务端架构。MariaDB基于事务的Maria存储引擎，使用了Percona的 XtraDB，InnoDB的变体，性能十分的强大。mariadb由开源社区维护，采用GPL授权许可，完全兼容MySQL。
1.6 NFS
NFS叫做网络文件系统，是由SUN公司研发的。见名知意，简单理解就是通过网络互联，将本地的文件系统共享出去，从而实现资源的共享。
二、架构要求
2.1 架构要求
1.用户可通过客户端Internet访问到如下网站
http://www.huwho.com
http://blog.huwho.com
2.通过客户端设置Hosts解析，解析到Nginx前端代理服务器上，代理服务器将请求轮询到后面的Varnish服务器，动态内容则直接分发到LAMP Web服务器上，动态内容也可以经由Varnish代理分发到动态服务器上但是不缓存。
3.在LAMP的Web服务器在分别部署www.huwho.com blog.huwho.com
4.当用户更新wordpress博客时，会通过Web服务器把数据写入Mariadb数据库服务器中。(注意：Mariadb与Web是分离的，不在一台服务器上，注意授权）。
5.当用户上传图片，附件时，其数据将通过Web服务器传到后端的NFS存储上，而不保存在Web服务器上。
6.为开发人员搭建phpmyadmin MySQL客户端管理软件管理MySQL。
7.为数据库人员安装Mycli数据库管理工具。
8.为Nginx负载均衡反向代理配置双主高可用。
2.2 系统版本选择
OS:centos7.3
Kernel：3.10.0-514.el7.x86_64
X86_64
2.3 部署环境
三、Linux系统环境查看
3.1 查看服务器硬件信息
dmidecode | grep "Product Name"
3.2 查看 CPU CPU型号
lscpu | grep "Model name"
3.3 查看CPU个数
lscpu | grep "^CPU(s)"
3.4 查看内存大小
free -h | grep Mem|awk ‘{print $2}‘ 四、系统初始化
#!/bin/bash
#CentOS7 initialization
if [[ "$(whoami)" != "root" ]]; then
echo "please run this script as root ." >&2
exit 1
fi
echo -e "\033[31m centos7系统初始化脚本，请慎重运行！ press ctrl+C to cancel \033[0m"
sleep 5
#update system pack
yum_update(){
yum -y install wget
cd /etc/yum.repos.d/
mkdir bak
mv ./*.repo bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum clean all && yum makecache
yum -y install net-tools lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel wget vim ncurses-devel autoconf automake zlib-devel python-devel expect
}
#set ntp
zone_time(){
cp /usr/share/zoneinfo/Asia/Chongqing /etc/localtime
printf ‘ZONE="Asia/Chongqing"\nUTC=false\nARC=false‘ > /etc/sysconfig/clock
/usr/sbin/ntpdate pool.ntp.org
echo "*/5 * * * * /usr/sbin/ntpdate pool.ntp.org > /dev/null 2>&1" >> /var/spool/cron/root;chmod 600 /var/spool/cron/root
echo ‘LANG="en_US.UTF-8"‘ > /etc/sysconfig/i18n
source /etc/sysconfig/i18n
}
#set ulimit
ulimit_config(){
echo "ulimit -SHn 102400" >> /etc/rc.local
cat >> /etc/security/limits.conf << EOF
* soft nofile 102400
* hard nofile 102400
* soft nproc 102400
* hard nproc 102400
EOF
}
#set ssh
sshd_config(){
sed -i ‘s/^GSSAPIAuthentication yes$/GSSAPIAuthentication no/‘ /etc/ssh/sshd_config
sed -i ‘s/#UseDNS yes/UseDNS no/‘ /etc/ssh/sshd_config
systemctl start crond
}
#set sysctl
sysctl_config(){
cp /etc/sysctl.conf /et/sysctl.conf.bak
cat > /etc/sysctl.conf << EOF
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 262144
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.ip_local_port_range = 1024 65535
EOF
/sbin/sysctl -p
echo "sysctl set OK!!"
}
#disable selinux
selinux_config(){
sed -i ‘s@SELINUX=enforcing@SELINUX=disabled@g‘ /etc/selinux/config
setenforce 0
}
iptables_config(){
systemctl stop firewalld.servic
systemctl disable firewalld.service
yum install iptables-services
cat > /etc/sysconfig/iptables << EOF
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:syn-flood - [0:0]
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p icmp -m limit --limit 100/sec --limit-burst 100 -j ACCEPT
-A INPUT -p icmp -m limit --limit 1/s --limit-burst 10 -j ACCEPT
-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -j syn-flood
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A syn-flood -p tcp -m limit --limit 3/sec --limit-burst 6 -j RETURN
-A syn-flood -j REJECT --reject-with icmp-port-unreachable
COMMIT
EOF
/sbin/service iptables restart
}
main(){
yum_update
zone_time
ulimit_config
sysctl_config
sshd_config
selinux_config
iptables_config
}
main 五、部署架构环境
5.1 分析每台服务器干了哪些活！
node1&node2
1.配置Nginx反向代理将用户的请求代理到后端的LAMP服务器上。
2.配置双主keepalived完成Nginx proxy的双主机高可用，当一台Nginx proxy宕机时，通过Keepalived把VIP转移到BACKUP服务器。
3.主要的文件需要每天凌晨通过Rsync备份（本文暂时未提供，会在后续补上）
node3&node4
1.配置Varnish缓存代理服务器。
2.缓存图片，html，css等静态文件；不缓存php,php5等动态文件。
node5
1.部署httpd服务，使用httpd的虚拟主机功能虚拟出四个web服务
2.Web1用来放置静态内容（暂时不用，只做测试）；Web2部署wordpress，PhpMyAdmin，Img1，Img2用于图片服务器.
3.挂载在远端的NFS共享目录到本地，实现图片放置到NFS服务器上。
4.重要文件在每天凌晨通过Rsync备份
node6
1.部署NFS服务，expect分发公钥
2.实时同步（暂时未部署）
3.重要文件每天凌晨通过Rsync备份
node7
1.与Httpd分离，须授权允许远程连接
2.通过Crond+Rsync定时备份（暂未提供）
3.重要文件每天凌晨通过Rsync备份
5.2 分发sshkey
将NFS服务器作为批量分发服务器，目前通过“人工智能”实现，对分发工具这一块还不熟悉，待补充。
ssh-keygen -t rsa -P ‘‘ ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.7 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.8 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.20 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.21 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.31 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.188 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.0.189
5.3 分发/etc/hosts
将/etc/hosts文件分发至每一台主机。
vi FenfaHost.sh
#!/bin/bash
#
cat > /etc/hosts << EOF
192.168.0.7 node1
192.168.0.8 node2
192.168.0.20 node3
192.168.0.21 node4
192.168.0.31 node5
192.168.0.188 node6
192.168.0.189 node7
EOF
IP=192.168.0
for I in 7 8 20 21 31 189;do
scp /etc/hosts root@${IP}.$I:/etc/
done5.4 程序包选择
安装全部选择yum安装，但是推荐源码安装。这里推荐一下自动化工具ansible，能够非常轻量地实现应用服务批量模块化管理。（PS:正在研究中，相信不久就能搞定！）
node1&node2
yum install -y keepalived ipvsadm nginx
Version:
Keepalived v1.2.13 (11/05,2016)
ipvsadm v1.27 2008/5/15 (compiled with popt and IPVS v1.2.1)
nginx version: nginx/1.10.2
node3&node4
yum install -y varnish
Version:
varnish 4.0.4
node5
yum install -y httpd php php-mysql php-mcrypt php-xcache php-mbstring nfs-utils
Server version:
Apache/2.4.6 (CentOS)
PHP 5.4.16 (cli) (built: Nov 6 2016 00:29:02)
phpMyAdmin-4.0.10.20-all-languages.tar.gz
wordpress-4.7.4-zh_CN
node6
yum install nfs-utils rpcbind -y
node7
yum install -y mariadb
Version: mariadb 5.5.52
5.5 node1&node2环境配置
nginx.conf配置
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
log_format main ‘$remote_addr - $remote_user [$time_local] "$request" ‘
‘$status $body_bytes_sent "$http_referer" ‘
‘"$http_user_agent" "$http_x_forwarded_for"‘;
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
upstream cachesrvs {
server 192.168.0.20:80;
server 192.168.0.21:80;
}
include /etc/nginx/conf.d/*.conf;
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name www.huwho.com;
# root /usr/share/nginx/html;
# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
location / {
proxy_pass http://cachesrvs;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
error_page 404 /404.html;
location = /40x.html {
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
}
server {
listen 80;
server_name blog.huwho.com;
location / {
proxy_pass http://192.168.0.32:80;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
error_page 404 /404.html;
location = /40x.html {
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
} keepalived.conf配置（node2稍有不同会在代码中注释说明）
! Configuration File for keepalived
#全局配置端
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 10
router_id node1 #另一节点修改为：node2
vrrp_mcast_group4 224.0.0.223 #组播地址，须保持一致
}
#Keepalived健康探测
vrrp_script chk_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight -5
}
#Nginx健康探测
vrrp_script chk_nginx {
script "killall -0 nginx && exit 0 || exit 1"
interval 1
weight -5
fall 2
rise 1
}
#第一个虚拟路由器
vrrp_instance VI_1 {
state MASTER #另一个节点修改为：BACKUP
interface ens37
virtual_router_id 51
priority 100 #优先级，另一个节点修改为：90
advert_int 1
authentication {
auth_type PASS
auth_pass JzvnmfkY
}
virtual_ipaddress {
10.0.0.200/24 dev ens37
}
track_script {
chk_down
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
#第二个虚拟路由器
vrrp_instance VI_2 {
state BACKUP #另一个节点修改为：MASTER
interface ens37
virtual_router_id 52
priority 90 #另一个节点修改为：100
advert_int 1
authentication {
auth_type PASS
auth_pass azvnmfkY
}
virtual_ipaddress {
10.0.0.201/24 dev ens37
}
track_script {
chk_down
chk_nginx
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
} notify.sh配置放置到/etc/keepalived
#!/bin/bash
#description: An example of notify script
#
contact=‘root@localhost‘
notify(){
local mailsubject="$(hostname) to be $1 vip floating"
local mailbody="$(date +‘%F %T‘):vrrp1 transition,$(hostname) changed to be $1"
echo "$mailbody" | mail -s "$mailsubject" $contact
}
case $1 in
master)
systemctl start nginx
notify master
;;
backup)
systemctl start nginx
notify backup
;;
fault)
systemctl stop nginx
notify fault
;;
*)
echo "Usage:$(basename $0) {master|backup|fault}"
exit 1
;;
esac5.6 node3&node4环境配置
default.vcl配置
vcl 4.0;
import directors;
# probe
probe www_probe {
.url = "/";
}
# Default backend
backend default {
.host = "192.168.0.31";
.port = "80";
}
# backend server
backend web1 {
.host = "192.168.0.31";
.port = "80";
.connect_timeout = 2s;
.first_byte_timeout = 10s;
.between_bytes_timeout = 1s;
.probe = www_probe;
}
backend web2 {
.host = "192.168.0.32";
.port = "80";
.connect_timeout = 2s;
.first_byte_timeout = 10s;
.between_bytes_timeout = 1s;
.probe = www_probe;
}
backend img1 {
.host = "192.168.0.33";
.port = "80";
.connect_timeout = 2s;
.first_byte_timeout = 10s;
.between_bytes_timeout = 1s;
.probe = www_probe;
}
backend img2 {
.host = "192.168.0.34";
.port = "80";
.connect_timeout = 2s;
.first_byte_timeout = 10s;
.between_bytes_timeout = 1s;
.probe = www_probe;
}
# init
sub vcl_init {
new web_cluster = directors.round_robin();
web_cluster.add_backend(web1);
web_cluster.add_backend(web2);
new img_cluster = directors.random();
img_cluster.add_backend(img1, 10); # 2/3 to backend one
img_cluster.add_backend(img2, 5); # 1/3 to backend two
}
# acl purgers
acl purgers {
"127.0.0.1";
"192.168.0.0"/24;
}
# recv
sub vcl_recv {
if (req.url ~ "\.(php|asp|aspx|jsp|do|ashx|shtml)($|\?)") {
set req.backend_hint = web2;
}
if (req.url ~ "\.(bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)$") {
set req.backend_hint = img_cluster.backend();
}
if (req.url ~ "\.(html|htm|css|js)") {
set req.backend_hint = web1;
}
# allow PURGE from localhost and 192.168.0...
if (req.method == "PURGE") {
if (!client.ip ~ purgers) {
return (synth(405, "Purging not allowed for " + client.ip));
}
return (purge);
}
if (req.method != "GET" &&
req.method != "HEAD" &&
req.method != "PUT" &&
req.method != "POST" &&
req.method != "TRACE" &&
req.method != "OPTIONS" &&
req.method != "PATCH" &&
req.method != "DELETE") {
return (pipe);
}
if (req.method != "GET" && req.method != "HEAD") {
return (pass);
}
if (req.url ~ "\.(php|asp|aspx|jsp|do|ashx|shtml)($|\?)") {
return (pass);
}
if (req.http.Authorization) {
return (pass);
}
if (req.http.Accept-Encoding) {
if (req.url ~ "\.(bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)$") {
unset req.http.Accept-Encoding;
} elseif (req.http.Accept-Encoding ~ "gzip") {
set req.http.Accept-Encoding = "gzip";
} elseif (req.http.Accept-Encoding ~ "deflate") {
set req.http.Accept-Encoding = "deflate";
} else {
unset req.http.Accept-Encoding;
}
}
if (req.url ~ "\.(css|js|html|htm|bmp|png|gif|jpg|jpeg|ico|gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)($|\?)") {
unset req.http.cookie;
return (hash);
if (req.restarts == 0) {
if (req.http.X-Fowarded-For) {
set req.http.X-Forwarded-For = req.http.X-Forwarded-For + "," + client.ip;
} else {
set req.http.X-Forwarded-For = client.ip;
}
}
}
}
# pass
sub vcl_pass {
return (fetch);
}
# backen fetch
sub vcl_backend_fetch {
return (fetch);
}
# hash
sub vcl_hash {
hash_data(req.url);
if (req.http.host) {
hash_data(req.http.host);
} else {
hash_data(server.ip);
}
return (lookup);
}
# hit
sub vcl_hit {
if (req.method == "PURGE") {
return (synth(200, "Purged."));
}
return (deliver);
}
# miss
sub vcl_miss {
if (req.method == "PURGE") {
return (synth(404, "Purged."));
}
return (fetch);
}
# backend response
sub vcl_backend_response {
set beresp.grace = 5m;
if (beresp.status == 499 || beresp.status == 404 || beresp.status == 502) {
set beresp.uncacheable = true;
}
if (beresp.http.content-type ~ "text") {
set beresp.do_gzip = true;
}
if (bereq.url ~ "\.(php|jsp)(\?|$)") {
set beresp.uncacheable = true;
} else { //自定义缓存文件的缓存时长，即TTL值
if (bereq.url ~ "\.(css|js|html|htm|bmp|png|gif|jpg|jpeg|ico)($|\?)") {
set beresp.ttl = 15m;
unset beresp.http.Set-Cookie;
} elseif (bereq.url ~ "\.(gz|tgz|bz2|tbz|zip|rar|mp3|mp4|ogg|swf|flv)($|\?)") {
set beresp.ttl = 30m;
unset beresp.http.Set-Cookie;
} else {
set beresp.ttl = 10m;
unset beresp.http.Set-Cookie;
}
return (deliver);
}
}
# deliver
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT";
set resp.http.X-Cache-Hits = obj.hits;
} else {
set resp.http.X-Cache = "MISS";
}
unset resp.http.X-Powered-By;
unset resp.http.Server;
unset resp.http.X-Drupal-Cache;
unset resp.http.Via;
unset resp.http.Link;
unset resp.http.X-Varnish;
set resp.http.xx_restarts_count = req.restarts;
set resp.http.xx_Age = resp.http.Age;
set resp.http.hit_count = obj.hits;
unset resp.http.Age;
return (deliver);
}
sub vcl_purge {
return (synth(200,"success"));
}
/* sub vcl_backend_error {
if (beresp.status == 500 ||
beresp.status == 501 ||
beresp.status == 502 ||
beresp.status == 503 ||
beresp.status == 504) {
return (retry);
}
}
*/
sub vcl_fini {
return (ok);
}varnish.params配置
RELOAD_VCL=1 VARNISH_VCL_CONF=/etc/varnish/default.vcl VARNISH_LISTEN_PORT=80 VARNISH_ADMIN_LISTEN_ADDRESS=127.0.0.1 VARNISH_ADMIN_LISTEN_PORT=6082 # Shared secret file for admin interface VARNISH_SECRET_FILE=/etc/varnish/secret VARNISH_STORAGE="malloc,512M" # User and group for the varnishd worker processes VARNISH_USER=varnish VARNISH_GROUP=varnish # Other options, see the man page varnishd(1) #DAEMON_OPTS="-p thread_pool_min=5 -p thread_pool_max=500 -p thread_pool_timeout=300"
5.7 node5环境配置
conf.d/http.conf配置
<VirtualHost 192.168.0.31:80> DocumentRoot "/apps/web/web1" DirectoryIndex index.html index.htm <Directory "/apps/web/web1"> Options Indexes FollowSymLinks AllowOverride none </Directory> <Location /> Require all granted </Location> </VirtualHost> <VirtualHost 192.168.0.32:80> DocumentRoot "/apps/web/web2" DirectoryIndex index.html index.php <Directory "/apps/web/web2"> Options Indexes FollowSymLinks AllowOverride none </Directory> <Location /> Require all granted </Location> </VirtualHost> <VirtualHost 192.168.0.33:80> DocumentRoot "/apps/web/img1" <Directory "/apps/web/img1"> Options Indexes FollowSymLinks AllowOverride none </Directory> <Location /> Require all granted </Location> </VirtualHost> <VirtualHost 192.168.0.34:80> DocumentRoot "/apps/web/img2" <Directory "/apps/web/img2"> Options Indexes FollowSymLinks AllowOverride none </Directory> <Location /> Require all granted </Location> </VirtualHost>
config.inc.php配置（phpMyAdmin-4.0.10.20-all-languages）
$cfg[‘blowfish_secret‘] = ‘1a8b72fcog6eeddddd‘; #随机添加字符串，加密作用 $cfg[‘Servers‘][$i][‘host‘] = ‘192.168.0.189‘; #更改IP为数据库的IP
wp-config.php配置（wordpress）
define(‘DB_NAME‘, ‘wordpress‘); /** MySQL数据库用户名 */ define(‘DB_USER‘, ‘michael‘); /** MySQL数据库密码 */ define(‘DB_PASSWORD‘, ‘password‘); /** MySQL主机 */ define(‘DB_HOST‘, ‘node7‘);
5.8 node6环境配置
/etc/exports配置
/data 192.168.0.0/24(rw,sync,all_squash,anonuid=48,anongid=48)
5.9 node7环境配置
安装Mycli，MySQL自动补全软件，高亮显式，我会单独写一篇博客介绍。
mysql create database wordpress; grant all on wordpress.* to michael@‘192.168.0.%‘ identified by ‘password‘; flush privileged; flush PRIVILEGES;
六、测试
测试一下www.huwho.com。由于我之前用Tomcat做过实验，因为浏览器缓存的原因，所以这里它会显式Tomcat的图标。其实这一个httpd的web服务。
测试一下动态站点blog.huwho.com，由于我第一次用ip访问的所以这里它会自动跳转成IP地址。
测试Varnish html缓存，命中。
测试Varnish图片缓存，命中。
测试php文件，不缓存。
（PS：这是之前搭建的一个架构，由于时间匆忙，很多细节未能够记录下来，很多服务以及配置文件信息也还未进行优化，但总算时能跑起来了，还请见谅。作者水平有限，如有不足，还请指教。）
本文出自 “有趣灵魂” 博客，请务必保留此出处http://powermichael.blog.51cto.com/12450987/1951870
Web集群部署（Nginx+Keepalived+Varnish+LAMP+NFS）