一、如图
二、安装tomcat(jdk安装参考http://blog.csdn.net/u011254180/article/details/77893457)
一、tar格式的安装(以apache-tomcat-7.0.52.tar.gz为例)
1)上传tomcat到linux上
2)解压Tomcat到/usr/local下
tar -zxvf apache-tomcat-7.0.52.tar.gz -C /usr/local/tomcat
3)开放Linux的对外访问的端口8080
/sbin/iptables -I INPUT -p tcp --dport 8080 -j ACCEPT
/etc/rc.d/init.d/iptables save
4)启动关闭Tomcat
进入tomcat的bin下启动:./startup.sh
进入tomcat的bin下关闭:./shutdown.sh
三、安装nginx(参考http://blog.csdn.net/u011254180/article/details/77897663)
配置文件和之前的一样
user nobody nobody;#定义Nginx运行的用户和用户组 worker_processes 4; #nginx进程数,建议设置为等于CPU总核心数。 error_log logs/error.log info;#全局错误日志定义类型,[ debug | info | notice | warn | error | crit ] worker_rlimit_nofile 1024; #一个nginx进程打开的最多文件描述符数目,所以建议与ulimit -n的值保持一致。 pid logs/nginx.pid;#进程文件 #工作模式及连接数上限 events { use epoll;#参考事件模型,use [ kqueue | rtsig | epoll | /dev/poll | select | poll ]; epoll模型是Linux 2.6以上版本内核中的高性能网络I/O模型 worker_connections 1024;#单个进程最大连接数(最大连接数=连接数*进程数) } #设定http服务器,利用它的反向代理功能提供负载均衡支持 http { include mime.types;#文件扩展名与文件类型映射表 default_type application/octet-stream;#默认文件类型 #设定负载均衡的服务器列表 upstream tomcatxxxcom { server 192.168.56.200:8080; server 192.168.56.201:8080; } #设定日志格式 log_format www_xy_com '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; sendfile on;#开启高效文件传输模式,sendfile指令指定nginx是否调用sendfile函数来输出文件,对于普通应用设为 on,如果用来进行下载等应用磁盘IO重负载应用,可设置为off,以平衡磁盘与网络I/O处理速度,降低系统的负载。注意:如果图片显示不正常把这个改成off。 keepalive_timeout 65; #长连接超时时间,单位是秒 #gzip on; #设定虚拟主机,默认为监听80端口 server { listen 80; server_name tomcat.xxx.com;#域名可以有多个,用空格隔开 #charset koi8-r; #设定本虚拟主机的访问日志 access_log /data/logs/access.log www_xy_com; #对 "/" 启用反向代理 location / { proxy_pass http://tomcatxxxcom; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } #error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } } |
lvs-dr.sh:和之前对比,变化之处就是vip和转发的端口。
#!/bin/bash #description:start lvs server echo "1" >/proc/sys/net/ipv4/ip_forward WEB1=192.168.56.200 WEB2=192.168.56.201 VIP1=192.168.56.90 /etc/rc.d/init.d/functions case "$1" in start) echo "start LVS of directorServer" #set the Virtual address and sysctl parameter /sbin/ifconfig eth1:0 $VIP1 broadcast $VIP1 netmask 255.255.255.255 up #clear ipvs table /sbin/ipvsadm -C #set LVS #web apache or tomcat /sbin/ipvsadm -A -t $VIP1:80 -s rr /sbin/ipvsadm -a -t $VIP1:80 -r $WEB1:80 -g /sbin/ipvsadm -a -t $VIP1:80 -r $WEB2:80 -g #run LVS /sbin/ipvsadm ;; stop) echo "close LVS directorserver" echo "0" >/proc/sys/net/ipv4/ip_forward /sbin/ipvsadm -C /sbin/ipvsadm -Z ;; *) echo "usage:$0 {start|stop}" exit 1 esac |
#!/bin/sh #description start realserver #chkconfig 235 26 26 VIP1=192.168.56.90 /etc/rc.d/init.d/functions case "$1" in start) echo "start LVS of realserver" /sbin/ifconfig lo:0 $VIP1 broadcast $VIP1 netmask 255.255.255.255 up 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 ;; stop) /sbin/ifconfig lo:0 down echo "close lvs dirctorserver" 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 "usage:$0{start|stop}" exit 1 esac |
注意:在用keepalived做tomcat和nginx的热备时,需要加入realserver的配置。但是做lvs的热备则不需要配置realserver,因为keepalived有lvs的配置参数。
backup:
! 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_instance VI_1 { state BACKUP interface eth1 lvs_sync_daemon_inteface eth1 virtual_router_id 51 priority 100 nopreempt advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.56.90 } } virtual_server 192.168.56.90 80 { delay_loop 6 lb_algo rr lb_kind DR #nat_mask 255.255.255.0 persistence_timeout 1 protocol TCP } |
! 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_instance VI_1 { state MASTER interface eth1 lvs_sync_daemon_inteface eth1 virtual_router_id 51 priority 200 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.56.90 } } virtual_server 192.168.56.90 80 { delay_loop 6 lb_algo rr lb_kind DR #nat_mask 255.255.255.0 persistence_timeout 1 protocol TCP } |
wangsf.sh脚本文件内容
#!/bin/bash while true; do A=`ipvsadm -ln | wc -l` B=`ps -ef|grep keepalived |wc -l` if [ $A -eq 3 ];then echo 'restart lvs!!!!' /usr/local/lvs/lvs-dr.sh start if [ $A -eq 3 ];then if [ $B -gt 1 ];then echo 'lvs dead !!!! kill keepalived' killall keepalived break fi fi fi if [ $A -eq 6 ];then if [ $B -eq 1 ];then echo 'tomcat live !!!! start keepalived' service keepalived start fi fi sleep 3 done |