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规划结构图
nginx接收用户请求反向代理至后端应用服务器
应用服务器或者session服务器其中一台宕机,不影响客户端会话的信息
OS:CentOS release 6.7 (Final)
Memcached设置
两台memcached1 2 各进行配置
1.安装memcached
[root@Memcached1 ~]# yum install memcached
[root@Memcachd2 ~]# yum install memcached
2.启动服务
[root@Memcached1 ~]# service memcachedstart
Starting memcached: [ OK ]
[root@Memcachd2 ~]# service memcached start
Starting memcached: [ OK ]
3.测试
[root@Memcached1 ~]# ss -tln
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 :::11211 :::*
LISTEN 0 128 *:11211 *:*
]# telnet 192.168.1.180 11211
Trying 192.168.1.180...
Connected to 192.168.1.180.
Escape character is '^]'.
quit
Connection closed by foreign host.
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[root@Memcachd2 ~]# ss –tln
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 :::11211 :::*
LISTEN 0 128 *:11211 *:*
]# telnet 192.168.1.190 11211
Trying 192.168.1.190...
Connected to 192.168.1.190.
Escape character is '^]'.
quit
Connection closed by foreign host.
| Tomcat设置
1.TomcatA B 安装
参照tomcat基本安装
2.上传jar文件
分别把依赖包上传到 Tomcat A B
]# pwd
/usr/local/tomcat/lib
3.TomcatA 设置
3.1创建目录
[root@TomcatA lib]# mkdir -pv /usr/local/tomcat/webapps/test/WEB-INF/{classes,lib}
mkdir: created directory `/usr/local/tomcat/webapps/test'
mkdir: created directory `/usr/local/tomcat/webapps/test/WEB-INF'
mkdir: created directory `/usr/local/tomcat/webapps/test/WEB-INF/classes'
mkdir: created directory `/usr/local/tomcat/webapps/test/WEB-INF/lib'
修改权限
[root@TomcatA lib]# chown -R tomcat /usr/local/tomcat/webapps/test/
| 3.2 创建主页内容
]# vim /usr/local/tomcat/webapps/test/index.jsp
TomcatA
TomcatA.zrd.com
Session ID
Created on
| 3.3 修改server.xml
高亮部分为 添加的内容其他不要修改
[root@TomcatA conf]# vim /usr/local/tomcat/conf/server.xml
| 4.TomcatB 设置
4.1创建目录
[root@TomcatB classes]# mkdir -pv /usr/local/tomcat/webapps/test/WEB-INF/{classes,lib}
mkdir: created directory `/usr/local/tomcat/webapps/test'
mkdir: created directory `/usr/local/tomcat/webapps/test/WEB-INF'
mkdir: created directory `/usr/local/tomcat/webapps/test/WEB-INF/classes'
mkdir: created directory `/usr/local/tomcat/webapps/test/WEB-INF/lib'
| 4.2创建主页内容
#]vim /usr/local/tomcat/webapps/test/index.jsp
TomcatB
TomcatB.zrd.com
Session ID
Created on
| 4.3 修改server.xml
添加高亮部分内容,其他不用改动
[root@TomcatB ~]# vim /usr/local/tomcat/conf/server.xml
| proxy设置
使用nginx作为反向代理服务器
1.安装
需要配置epel源(http://mirrors.sohu.com/fedora-epel/6/x86_64/ )
yum install nginx
2.修改配置文件
高亮部分为添加的内容,其他不动
[root@zrd0 nginx]# cat /etc/nginx/nginx.conf
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log;
#error_log /var/log/nginx/error.log notice;
#error_log /var/log/nginx/error.log info;
pid /run/nginx.pid;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
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;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf;
index index.html index.htm;
upstream tomcats {
# ip_hash;
server 192.168.1.150:8080;
server 192.168.1.160:8080;
}
server {
listen 80;
server_name localhost;
root /usr/share/nginx/html;
#charset koi8-r;
#access_log /var/log/nginx/host.access.log main;
location / {
proxy_pass http://tomcats/;
}
# redirect server error pages to the static page /40x.html
#
error_page 404 /404.html;
location = /40x.html {
}
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# root html;
# location / {
# }
#}
# HTTPS server
#
#server {
# listen 443;
# server_name localhost;
# root html;
# ssl on;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_timeout 5m;
# ssl_protocols SSLv2 SSLv3 TLSv1;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# }
#}
}
| 测试
启动服务
memcached
[root@Memcached1 ~]# service memcached start
Starting memcached: [ OK ]
[root@Memcachd2 ~]# service memcached start
Starting memcached: [ OK ]
| Tomcat
[root@TomcatA conf]# service tomcat start
[root@TomcatB conf]# service tomcat start
| nginx
[root@zrd0 nginx]# service nginx start
| 轮询测试
关闭Memcached2,故障转移是否成功
[root@Memcachd2 ~]# service memcached stop
Stopping memcached: [ OK ]
故障转移到Memcached1成功
配置文件
TomcatA B
nginx
附件:http://down.运维网.com/data/2366273
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