====== CentOS 安裝 Nginx 擔任網站分派器 ======
===== 安裝 nginx yum repo =====
==== CentOS 6 ==== 
<code sh>
rpm -ivh http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm
</code>

==== CentOS 7 ====
<code sh>
rpm -ivh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
</code>

===== 安裝 nginx web-server =====
<code sh>
yum install nginx
</code>

===== 設定開機自動啟動 nginx ===== 
<code sh>
chkconfig nginx on
</code>

===== 設定 Virtual Host =====
  * 假設連上 nginx 有 abc.ichiayo.com  與 xyz.ichiayi.com 兩個 Virtual Host 分別對應到 192.168.11.233 / 192.168.11.232
<code sh>
vi /etc/nginx/nginx.conf
</code><file>
:
worker_processes  2;
:
    gzip  on;

    include /etc/nginx/conf.d/*.conf;
}
</file><code sh>
vi /etc/nginx/conf.d/default.conf
</code><file>
server {
    listen       80;
    server_name  localhost;
:
</file><code sh>
vi /etc/nginx/conf.d/abc_ichiayi.conf
</code><file>
server {
        server_name     abc.ichiayi.com abc1.ichiayi.com;

        access_log /var/log/nginx/abc.ichiayi.com.access.log main;
        error_log /var/log/nginx/abc.ichiayi.com.error.log;

        location / {
                set_real_ip_from  192.168.11.0/24;
                real_ip_header    X-Forwarded-For;
                real_ip_recursive on;

                proxy_pass       http://192.168.11.233:80;
                proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
                proxy_redirect off;
                proxy_buffering off;
                proxy_set_header Host      $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location /292/ {
                proxy_pass http://192.168.11.292/;
        }
}
</file><code sh>
vi /etc/nginx/conf.d/xyz_ichiayi.conf
</code><file>
server {
        server_name     xyz.ichiayi.com;

        access_log /var/log/nginx/xyz.ichiayi.com.access.log main;
        error_log /var/log/nginx/xyz.ichiayi.com.error.log;

        location / {
                set_real_ip_from  192.168.11.0/24;
                real_ip_header    X-Forwarded-For;
                real_ip_recursive on;

                proxy_pass       http://192.168.11.232:80;
                proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
                proxy_redirect off;
                proxy_buffering off;
                proxy_set_header Host      $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        }
}
</file>

<note>
  * 當設定多個 Virtual Host 之後, 如果 DNS 有設定, 但未設定 Virtual Host 的 Domain Name 希望能指定預設網站, 可在預設的 server 設定檔內設定如下:<file>
server {
    listen      192.168.1.2:80 default_server;
    server_name example.com www.example.com;
    ...
}
</file>
  * 也就是在 listen 80 後面加上 **default_server**
  * https 也可以這樣指定 Exp. <file>
:
listen 443 ssl default_server;
:
</file>
</note>


<WRAP center round info 80%>
  * 因有朋友告知 http://ichiayi.com 出現 404 找不到網頁狀況, 所以針對 /etc/nginx/conf.d/www_ichiayi.conf 進行修改, 將 ichiayi.com 加入 server 內和 www.ichiayi.com 一樣<file>
server {
        server_name     ichiayi.com www.ichiayi.com;
:
:
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
    if ($host = www.ichiayi.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    if ($host = ichiayi.com) {
        return 301 https://www.ichiayi.com$request_uri;
    }

        listen  80 default_server;
        server_name     ichiayi.com www.ichiayi.com;
    return 404; # managed by Certbot
}
</file>然後重新啟動 nginx <cli>
systemctl restart nginx
</cli>
</WRAP>

===== 其他相關資訊 =====
  * **[[tech/ssl_letsencrypt]]**
  * **[[tech/nginx_proxy_real_ip]]**

===== 參考網址 =====
  * http://www.cyberciti.biz/faq/install-nginx-centos-rhel-6-server-rpm-using-yum-command/
  * http://www.php100.com/html/program/nginx/2013/0905/5516.html
  * http://nginx.org/en/docs/http/request_processing.html
  * https://ma.ttias.be/nginx-proxy-upstream-sent-big-header-reading-response-header-upstream/

{{tag>install nginx centos web}}