一、构建两个tomcat容器并启动
- [root@localhost bin]# ps -ef|grep tomcat
- root 1525 1 12 10:19 pts/0 00:00:03 /usr/bin/java -Djava.util.logging.config.file=/usr/local/tomcat-1/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /usr/local/tomcat-1/bin/bootstrap.jar:/usr/local/tomcat-1/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/tomcat-1 -Dcatalina.home=/usr/local/tomcat-1 -Djava.io.tmpdir=/usr/local/tomcat-1/temp org.apache.catalina.startup.Bootstrap start
- root 1586 1 39 10:19 pts/0 00:00:02 /usr/bin/java -Djava.util.logging.config.file=/usr/local/tomcat-2/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /usr/local/tomcat-2/bin/bootstrap.jar:/usr/local/tomcat-2/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/tomcat-2 -Dcatalina.home=/usr/local/tomcat-2 -Djava.io.tmpdir=/usr/local/tomcat-2/temp org.apache.catalina.startup.Bootstrap start
二、修改两个容器的web首页，并测试两个容器是否正常
三、启动Nginx并查看进程
- [root@www ~]# /usr/local/nginx/sbin/./nginx
- [root@www ~]# ps -ef|grep nginx
- root 5354 1 0 13:00 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/./nginx
- nobody 5355 5354 0 13:00 ? 00:00:00 nginx: worker process
四、开始实验：
Nginx代理服务器IP：192.168.249.132
Tomcat-1 IP：192.168.249.133：8080
Tomcat-2 IP：192.168.249.133：8081
1.配置测试反向代理
1）修改Nginx的配置文件
- [root@www conf]# cat nginx.conf|grep -E -v "#|^$"
- worker_processes 1;
- events {
- worker_connections 1024;
- }
- http {
- include mime.types;
- default_type application/octet-stream;
- sendfile on;
- keepalive_timeout 65;
- server {
- listen 80;
- server_name localhost;
- location / {
- proxy_pass http://192.168.249.133:8080; #将请求转向后端定义的Tomcat-1上.
- }
- error_page 500 502 503 504 /50x.html;
- location = /50x.html {
- root html;
- }
- }
- }
2）重新载入nginx.conf
- [root@www conf]# cat nginx.conf|grep -E -v "#|^$"
3）访问Nginx代理服务器，查看是否跳转
2.负载均衡算法测试——轮询算法
1）在nginx.conf的server块里写入upstream配置块，并修改proxy_pass参数
- [root@www conf]# cat nginx.conf|grep -E -v "#|^$"
- worker_processes 1;
- events {
- worker_connections 1024;
- }
- http {
- include mime.types;
- default_type application/octet-stream;
- sendfile on;
- keepalive_timeout 65;
- upstream nginxtest {
- server 192.168.249.133:8080;
- server 192.168.249.133:8081;
- }
- server {
- listen 80;
- server_name localhost;
- location / {
- proxy_pass http://nginxtest;
- }
- error_page 500 502 503 504 /50x.html;
- location = /50x.html {
- root html;
- }
- }
- }
2）重新载入nginx.conf
- [root@www conf]# ../sbin/./nginx -s reload
3）多次访问Nginx代理服务器
一直刷新页面会发现随机出现两个网页，这就是nginx默认的负载均衡算法：轮询算法
3.负载均衡权重测试——权重算法
1）在nginx.conf的server块里修改upstream配置块，在其中server参数后添加weight参数
- [root@www conf]# cat nginx.conf|grep -E -v "#|^$"
- worker_processes 1;
- events {
- worker_connections 1024;
- }
- http {
- include mime.types;
- default_type application/octet-stream;
- sendfile on;
- keepalive_timeout 65;
- upstream nginxtest {
- server 192.168.249.133:8080 weight=3;
- server 192.168.249.133:8081 weight=2;
- }
- server {
- listen 80;
- server_name localhost;
- location / {
- proxy_pass http://nginxtest;
- }
- error_page 500 502 503 504 /50x.html;
- location = /50x.html {
- root html;
- }
- }
- }
2）重新载入nginx.conf
- [root@www conf]# ../sbin/./nginx -s reload
3）访问nginx代理服务器
发现刷新三次是tomcat-1后，后两次刷新是tomcat-2.
剩下的两种算法持续更新哦……
经验首页