Linux配置Nginx＋Tomcat负载均衡
cd /usr/local/tomcat1/webapps/ROOT/
tar -zxvf nginx-1.14.2.tar.gz -C /usr/local
一、Linux配置Nginx
一、下载Nginx
方式1：从http://nginx.org/en/download.html上下载稳定版，解压安装
方式2：直接在Linux上用命令下载： wget http://nginx.org/download/nginx-1.10.2.tar.gz
-bash: wget: command not found
安装wget:
yum -y install wget
再执行下载nginx
二、解压安装包&重命名
tar -zxvf nginx-1.14.2.tar.gz -C /usr/local
mv nginx-1.14.2 nginx
三、编译
1、cd 到nginx目录下
2、安装相关组件
yum install -y pcre pcre-develyum install -y zlib zlib-develyum install -y openssl openssl-devel
这是提示缺少c++环境 ，用 yum install gcc-c++ 安装一下，再执行 ./configure，然后又报错了：
./configure: error: the HTTP rewrite module requires the PCRE library.
You can either disable the module by using –without-http_rewrite_module
option, or install the PCRE library into the system, or build the PCRE library
statically from the source with nginx by using –with-pcre= option.
没装伪静态模块需要pcre库
解决方法：
yum install -y pcre pcre-devel
还有可能出现：
错误提示：./configure: error: the HTTP cache module requires md5 functions
from OpenSSL library. You can either disable the module by using
–without-http-cache option, or install the OpenSSL library into the system,
or build the OpenSSL library statically from the source with nginx by using
–with-http_ssl_module –with-openssl= options.
解决办法：
yum -y install openssl openssl-devel
最后 ./configure
执行make 编译：
然后：make install 报错：
问题原因： 直接把安装包重命名成nginx了，安装文件没有路径了。
解决办法如下：
删除nginx 文件夹
rm -rf nginx
重新解决源码
tar -zxvf nginx-1.10.2.tar.gz
cd /usr/local/nginx-1.10.2
生成Makefile文件
./configure --prefix=/usr/local/nginx
编译源码
make
安装
make install
这里不必要太纠结，只要 /usr/local/ 下出现了 /nagix文件就ok，进入 cd /usr/local/nginx/sbin 下，启动 ./nginx
问题1：出现端口占用，nginx一般是80端口，要么把其他的kill掉，要么更改nginx的端口
1、kill掉其他的之前，要知道哪个占用了：用 lsof -i:80可以查看，这里是之前的lamp占用了
2、我们可以修改nginx自身的监听端口，vi /usr/local/nginx/conf/nginx.conf ,将listen 80，改为自己要的就行，我们这里改81
server { listen 80; server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / { root html; index index.html index.htm; }
之后进入我们的ip:81就可以访问：
二、Linux配置Tomcat
1、下载
下载地址：https://tomcat.apache.org/download-90.cgi
这里我们用tomcat 9 吧，下载后，一样放到 /usr/local 下，解压两份，一份作为 tomcat1 ， 一份为 tomcat 2 这两份，用来做负载均衡
解压： tar -zxvf apache-tomcat-9.0.13.tar.gz -C /usr/local
重命名： mv apache-tomcat-9.0.13 tomcat1
2、配置：
修改其中一个tomcat2 的端口信息，tomcat1则不需要修改
cd /usr/local/tomcat2/conf
vi server.xml
改以下三个端口为：8006,8081,8099
<Server port="8005" shutdown="SHUTDOWN"> <Connector port="8080" protocol="HTTP/1.1" <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
3、分别更改两个 tomcat下默认的jsp页面
cd /usr/local/tomcat1/webapps/ROOT/
vi index.jsp
在body中添加一行html 代码，用于区分是哪个tomcat下的页面。
4、启动两个tomcat
cd /usr/local/tomcat1/bin
./startup.sh
打开本地的ip：8080和ip：8081可以看到，两个页面都有提示信息：
但是8080 被占用，我们用8081和8082:8081
8082
这样，就是安装成功啦！
三、Nginx配置Tomcat负载均衡
1、安装好nginx的情况下
2、修改配置文件
cd /usr/local/nginx/conf
vi nginx.conf
添加ngnix分配策略（权重策略）
upstream dangdang.com { server 192.168.66.129:8081 weight=1; //tomcat1 的ip和端口 server 192.168.66.129:8082 weight=1; //tomcat2 的ip和端口 }
整个文件的信息如下：
#user nobody; worker_processes 1; #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { worker_connections 1024; } http { include 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 logs/access.log main; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #gzip on; upstream dangdang.com {
server 192.168.66.129:8081 weight=1; //tomcat1 的ip和端口
server 192.168.66.129:8082 weight=1; //tomcat2 的ip和端口
} server { listen 81; server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / { root html; index index.html index.htm;
proxy_pass http://dangdang.com; } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root 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; # location / { # root html; # index index.html index.htm; # } #} # HTTPS server # #server { # listen 443 ssl; # server_name localhost; # ssl_certificate cert.pem; # ssl_certificate_key cert.key; # ssl_session_cache shared:SSL:1m; # ssl_session_timeout 5m; # ssl_ciphers HIGH:!aNULL:!MD5; # ssl_prefer_server_ciphers on; # location / { # root html; # index index.html index.htm; # } #} }
结果：一直刷新
结果1：
结果2：
