关于FastDFS蛋疼的集群和负载均衡(七)之Nginx高可用集群应用到FastDFS集群

Interesting things

这将会是关于FastDFS蛋疼的集群和负载均衡系列收官之篇，不排除有总结篇！这篇就是将keepalived实现的nginx集群高可用应用到我们的FastDFS集群中。

What did you do today

• 我们需要修改192.168.12.77和192.168.12.88设备上的nginx.conf，配置如下所示:

  
  #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 {

cmazxiaoma is handsome

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 fastdfs_tracker {
            server  192.168.12.11:8000 weight=1 max_fails=2 fail_timeout=30s;
            server  192.168.12.22:8000 weight=1 max_fails=2 fail_timeout=30s;
    }

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;

    access_log  logs/host.access.log  main;

    location /fastdfs {
            root html;
            index index.html index.htm;
            proxy_pass http://fastdfs_tracker/;
            proxy_set_header Host $http_host;
            proxy_set_header Cookie $http_cookie;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            client_max_body_size 300m;
    }

    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;
#    }
#}

}

*  我们对配置做了一些修改。
 * 一处是添加了负载均衡upstream fastdfs_tracker.把192.168.12.11和192.168.12.22两台设备作为tracker，现在我们集群了一层nginx来代理2台tracker

    upstream fastdfs_tracker {
            server  192.168.12.11:8000 weight=1 max_fails=2 fail_timeout=30s;
            server  192.168.12.22:8000 weight=1 max_fails=2 fail_timeout=30s;
    }

* 另一处修改是添加了一个location，匹配路径中含有fastdfs。

* 我们再上传一张图片。上传成功返回group1/M00/00/00/wKgMIVpE8IKAWxlrAADRd6mMX3g207.jpg

![上传图片](http://upload-images.jianshu.io/upload_images/4636177-4fd69861aca61594.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

* 我们试着访问http://192.168.12.111/fastdfs/group1/M00/00/00/wKgMIVpE8IKAWxlrAADRd6mMX3g207.jpg，完美！
![我爱五月天](http://upload-images.jianshu.io/upload_images/4636177-07147ed46d678851.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

***
###Summary
> FastDFS负载均衡和集群终于搞定了。
1.虚拟ip 192.168.12.111提供入口
2.一层Nginx集群负载均衡(192.168.12.77、192.168.12.88)
3.Tracker+Nginx负载均衡(192.168.12.11)
4.Tracker + Nginx负债均衡(192.168.12.22)
5.Group1包含Stroage+Nginx(192.168.12.33), Storage+Nginx(192.168.12.44)
6.Group2包含Stroage+Nginx(192.168.12.55), Storage+Nginx(192.168.12.66)
一共2台tracker、4台storage、8台nginx。

###What to do tomorrow
> 写一篇关于FastDFS集群和负载均衡的总结。这个星期把Spring Security和二叉树两篇博客搞定，预习Zookeeper。下一个星期把Zookeeper撸一遍。