nginx + keepalived 實現高可靠web網站

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組網圖：

 

配置資訊：

左邊nigx 伺服器的 /usr/local/nginx/conf/nginx.conf

 

 

#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;

 

    server {

        listen       80;

        server_name  192.168.248.200;

 

        #charset koi8-r;

 

        #access_log  logs/host.access.log  main;

 

        location / {

            root   html;

            index  index.html index.htm;

        }

 

        #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;

    #    }

    #}

 

}

 

 

右邊的nginx 伺服器的設定檔 /usr/loca/nginx/conf/nginx.conf內容如下：

 

#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;

 

    server {

        listen       80;

        server_name  192.168.248.200;

 

        #charset koi8-r;

 

        #access_log  logs/host.access.log  main;

 

        location / {

            root   html;

            index  index.html index.htm;

        }

 

        #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;

    #    }

    #}

 

}

 

左邊nginx伺服器的預設 html檔案內容為： ( /usr/local/nginx/html/index.html)

I am nginx master

右邊nginx伺服器的預設html檔案內容為：（路徑同上）

I am nginx-slave

 

左邊nginx伺服器的keepalived設定檔為：( /etc/keepalived/keepalived.conf)

global_defs {

    router_id NodeA

}

vrrp_instance VI_1 {

    state MASTER    #設定為主伺服器

    interface ens33  #監測網路介面

    virtual_router_id 51  #主、備必須一樣

    priority 100   #(主、備機取不同的優先順序，主機值較大，備份機值較小,值越大優先順序越高)

    advert_int 1   #VRRP Multicast廣播周期秒數

    authentication {

    auth_type PASS  #VRRP認證方式，主備必須一致

    auth_pass 1111   #(密碼)

}

virtual_ipaddress {

    192.168.248.200

}

 

右邊nginx伺服器的keepalived設定檔內容如下：

global_defs {

    router_id NodeB

}

vrrp_instance VI_1 {

    state BACKUP    #設定為主伺服器

    interface ens33  #監測網路介面

    virtual_router_id 51  #主、備必須一樣

    priority 90   #(主、備機取不同的優先順序，主機值較大，備份機值較小,值越大優先順序越高)

    advert_int 1   #VRRP Multicast廣播周期秒數

    authentication {

    auth_type PASS  #VRRP認證方式，主備必須一致

    auth_pass 1111   #(密碼)

}

virtual_ipaddress {

    192.168.248.200

}

 

啟動nginx伺服器和配置防火牆

#/usr/local/nginx/sbin/nginx

#firewall-cmd --permanent --add-port=80/tcp

#firewall-cmd --reload

 

實際測試結果如下：

關閉左邊的nginx的ens33連接埠後，造成nginx備生主，

 

nginx + keepalived 實現高可靠web網站