Nginx處理靜態web頁面，tomcat處理動態頁面，動靜結合。
Nginx+tomcat實現負載均衡1
負載均衡服務器：192.168.0.179
負載均衡主機：192.168.0.179
192.168.0.34
179主機配置如下：
[root@server79 lnmp]# scp tomcat/ jdk/ 192.168.0.34:/usr/local/
[root@server79 conf]# vim nginx.conf
# location ~ \.jsp$ {
# proxy_pass http://127.0.0.1:8080;
#}
http {
upstream westos{
server 192.168.0.34:8080;
server 192.168.0.179:8080;
}
include mime.types;
server {
listen 80;
server_name www.westos.org;
location ~ \.jsp$ {
proxy_pass http://westos;
}
[root@server79 ROOT]# vim test.jsp
server79 time is: <%=new java.util.Date() %>
[root@server79 ROOT]# scp test.jsp 192.168.0.34:/usr/local/tomcat/webapps/ROOT
[email protected]'s password:
test.jsp
Nginx -t,nginx -s reload
34測試主機：
[root@server34 bin]# vim /etc/profile
export JAVA_HOME=/usr/local/jdk
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$PATH:$JAVA_HOME/bin
激活
[root@server34 bin]# source /etc/profile
[root@server34 ROOT]# vim test.jsp
server34 time is: <%=new java.util.Date() %>
[root@server34 bin]# ./startup.sh
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr/local/jdk
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
測試：
http：//www.westos.org/test.jsp
多次刷新會看到：server79 time is: Tue Apr 22:03:42:52 CST 2014
Server34 time is: Tue Apr 22:03:42:54 CST 2014
Nginx+tomcat實現負載均衡2
在Nginx+tomcat實現負載均衡1已經通過nginx+tomcat實現了負載均衡，但出現一個問題，當刷新頁面時，界面會跳動，這樣的場景我們不奔潰，客戶早都淚奔。爲了解決界面跳動的問題，我們用nginx-sticky粘住界面，只有當客戶清除歷史記錄再次刷新時纔有可能跳轉到另一界面。以下就是實現此功能的過程：
負載均衡服務器：192.168.0.179
測試主機：192.168.0.34
192.168.0.179
下載包： nginx-sticky-module-1.0.tar.gz
nginx-1.4.2.tar.gz
解壓
[root@server79 ~]# tar zxf nginx-sticky-module-1.0 nginx-1.4.2.tar.gz
爲了安全，刪除版本號
[root@server79 nginx-1.4.2]# vim src/core/nginx.h
#define NGINX_VER "nginx"
註釋掉debug，使得編譯更純淨
[root@server79 nginx-1.4.2]# vim auto/cc/gcc
#CFLAGS="$CFLAGS -g"
編譯，增加https加密模塊，http的狀態模塊，nginx-sticky模塊
[[email protected]]#./configure --prefix=/usr/local/lnmp/nginx/ --with-http_ssl_module--with-http_stub_status_module --add-module=/root/nginx-sticky-module-1.0
make之前，stop掉nginx
[root@server79 nginx-1.4.2]# nginx -s stop
修改nginx的配置文件，加入sticky參數
[root@server79 nginx-1.4.2]# vim /usr/local/lnmp/nginx/conf/nginx.conf
http {
upstream westos{
sticky;
server 192.168.0.34:8080;
server 192.168.0.179:8080;
}
檢測nginx的配置文件時顯示檢測失敗，需make
[root@server79 nginx-1.4.2]# nginx -t
nginx:[emerg]unknowndirective "sticky" in /usr/local/lnmp/nginx/conf/nginx.conf:20
nginx: configuration file /usr/local/lnmp/nginx/conf/nginx.conf test failed
[root@server79 nginx-1.4.2]# make && make install
再次檢測成功
[root@server79 nginx-1.4.2]# nginx -t
nginx: the configuration file /usr/local/lnmp/nginx//conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/lnmp/nginx//conf/nginx.conf test is successful
啓動nginx
[root@server79 nginx-1.4.2]# nginx
測試：
[root@server79 bin]# ./startup.sh
[root@server79 bin]# pwd
/usr/local/lnmp/tomcat/bin
[root@server34 bin]# ./startup.sh
http://www.westos.org/test.jsp
出現：server79 time is:Sun Apr 20 09:28:17 CST 2014,當持續刷新時。頁面的server79一直沒變即成功，要想出現192.168.0.34的測試頁面，需清除記錄