nginx 反向代理，和ssl重定向。

1. 安装nginx，

准备

yum install gcc-c++
yum install -y pcre pcre-devel                  //正则表达式支持
yum install -y zlib zlib-devel                      //压缩
yum install -y openssl openssl-devel

下载nginx压缩包，传至服务器

tar -zxvf nginx1.14.0.tar.gz //解压

mv nginx-1.14.0 ngnix //改名

cp -r nginx /usr/local/src //将源码拷贝至src目录

进入src目录，编译

./configure --prefix=/usr/nginx --with-http_ssl_module //prefix 为安装目录，后面的为ssl支持

make install

2. 配置nginx的ssl

将证书拷贝至nginx的安装目录下的conf目录下的cert 目录（新建）

vim nginx.conf

每行语句结束的必须有分号，否则报错。“；”

server {
        listen       443 ssl;
        server_name  www.yiwiki.com;
        ssl_certificate cert/5xxx6_www.yiwiki.com.pem;
        ssl_certificate_key cert/5xxx56_www.yiwiki.com.key;
        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        location / {
          #  root   html;
          #  index  index.html index.htm;
        proxy_set_header HOST $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_pass http://www.yiwiki.com;
        }

然后编辑 server的80口端

server{
        listen 80;
    #   return 301 https://$host$request_uri;
        server_name www.yiwiki.com;
    #   return 301 https://$server_name$request_uri;
    ############以下为重定向，设置成功后，停止启动nginx服务器，不能reload，不起作用。
        rewrite ^(.*)$ https://$host$1 permanent;
        location / {
        proxy_set_header HOST $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_pass http://www.yiwiki.com/;
    }
        }

3. 设置反向代理

#keepalive_timeout  0;
    keepalive_timeout  65;
    ####以下为关键代码,server为提前装好的tomcat，可以多个，进行轮询，可以编写权重，需要开启ip_hash，防止session跨域异常,后面设置权重，和健康检查，两次失败后自动剔除，30s无响应为确认失败
    upstream www.yiwiki.com{
        server 127.0.0.1:8080 weight=1 max_fails=2 fail_timeout=30s;
        server 127.0.0.1:8090 weight=1 max_fails=2 fail_timeout=30s;

} #gzip on;

------------------------------------

打补丁看健康监控，另外一篇设置健康检测

https://www.cnblogs.com/wangxiaoqiangs/p/7793497.html

轮询时间为3秒，有2次成功为up，5次失败为down，超时时间为2秒。

 upstream www.yiwiki.com{
        server 127.0.0.1:8080;
　　　　server 127.0.0.1:8090;
        check interval=3000 rise=2 fall=5 timeout=2000 type=http;
        check_http_expect_alive http_2xx http_3xx;
     }

 server {
        listen       443 ssl;
        server_name  www.yiwiki.com;
        #rewrite ^(.*)$ https://$host$1;
        ssl_certificate cert/5089556_www.yiwiki.cn.pem;
        ssl_certificate_key cert/5089556_www.yiwiki.cn.key;
        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
       #charset koi8-r;
        #access_log  logs/host.access.log  main;
        location / {
          #  root   html;
          #  index  index.html index.htm;
        proxy_set_header HOST $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://www.yiwiki.cn;
        }
#######################加入这段后，可以通过浏览器 Https://www.yiwiki.com/status 查看页面，如果爆红，说明有问题
        location /status{
                check_status;
        }

        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html
        #

这个的安装，有些复杂

首先安装git， yum install git ,然后，切换到/usr/nginx，得到clone的文件，里面有多个版本的patch

 git clone https://github.com/yaoweibin/nginx_upstream_check_module.git

安装打补丁的patch程序

yum -y install patch

然后切换至nginx的源码目录，在src上层。

运行patch，注意版本和nginx的保持一致，

patch -p1 < /usr/nginx/nginx_upstream_check_module/check_1.14.0+.patch

然后运行nginx的configure文件，/nginx_xxx_module的目录是刚才下载的patch的目录。上一步补丁，只是说明编译时需要加的参数，后面add module是确切的文件。即下载的原始git文件夹

./configure --prefix=/usr/nginx --with-http_ssl_module --add-module=/usr/nginx/nginx_upstream_check_module

然后make，make install。

4. 重启nginx，重启nginx，

一定用ps -ef | grep nginx，查看占用情况。

root 3042 742 0 09:21 pts/0 00:00:00 grep --color=auto nginx //grep 带 color的为本条命令自身。

如果其他还有nginx进程，则会出现配置不起作用的情况。

cd /usr/nginx/sbin

./nginx -s stop //停止

./nginx //启动

./nginx -s reload // 重启，有时不好用，一定要用ps -ef | grep nginx 查看

5.自启动

https://www.cnblogs.com/gimin/p/8893559.html，需修改官方文档中的ngnix和conf的目录。

https://www.nginx.com/resources/wiki/start/topics/examples/redhatnginxinit/

#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 yiwiki{
        server 127.0.0.1:8080;
        server 112.126.56.244:80;
check interval=3000 rise=2 fall=5 timeout=2000 type=http;
check_http_expect_alive http_2xx http_3xx;
ip_hash;
        } 
   
    server {
        listen 80;
        server_name localhost;
        rewrite ^(.*)$ https://$host$1 permanent;
    } 

    server {
        listen      443 ssl;
        server_name  localhost;
        ssl_certificate cert/508556_www.yiwiki.cn.pem;
        ssl_certificate_key cert/508556_www.yiwiki.cn.key;
        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
        #    root   html;
        #    index  index.html index.htm;
        #proxy_set_header HOST $host;
        #proxy_set_header X-Forwarded-Proto $scheme;
        #proxy_set_header X-Real-IP $remote_addr;
        #proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://yiwiki/;
    }

    location /status{
        check_status;
    }
        #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;
    #    }
    #}

}