Nginx负载均衡使用

Here’s the table of contents:

安装
启动
重新载入配置文件【热加载】
重启nginx
停止nginx
配置多个IP映射到一个域名
配置支持TCP协议转发【bolt】
动态加载stream模块

安装

下载压缩包上传服务器解压

安装依赖模块

sudo yum -y install openssl openssl-devel
sudo yum -y install make zlib zlib-devel gcc-c++ libtool  openssl openssl-devel

编译
```
./configure
```
```
sudo make
```
安装
```
sudo make install
```

启动

cd /usr/local/nginx/sbin
sudo ./nginx

重新载入配置文件【热加载】

sudo ./nginx -s reload

nginx -s reload

重启nginx

sudo ./nginx -s reopen

停止nginx

sudo ./nginx -s stop

配置多个IP映射到一个域名

配置nginx.conf文件【ONgDB集群的HTTP服务使用Nginx服务做负载】

    #ONgDB SERVER
    upstream ongdb_http {
        least_conn;
        server 10.20.12.173:7474;
        server 10.20.13.146:7474;
        server 10.20.13.200:7474;
    }
    server {
        listen       80;
        server_name  testlab.ongdb.http.server;
        #charset koi8-r;
        #access_log  logs/host.access.log  main;
        location / {
            root   html;
            index  index.html index.htm;
            proxy_pass  http://ongdb_http;
            # 返回真实IP或域名，不要返回服务组名称
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header REMOTE-HOST $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
     }

Nginx负载均衡策略优化

# 其它所有的非backup机器down或者忙的时候，请求backup机器
# ONgDB SERVER
  upstream ongdb_http {
      least_conn;
      server 10.20.12.173:7474 backup;
      server 10.20.13.146:7474 backup;
      server 10.20.13.200:7474;
      server 10.20.0.157:7674;
  }

配置支持TCP协议转发【bolt】

# 该配置与http平级
# ONgDB负载
stream {
   upstream ongdb_7687 {
      #hash X-Forwarded-For;
      # hash X-Real-Ip;
      least_conn;
      server 10.20.12.173:7687 backup;
      server 10.20.13.146:7687 backup;
      server 10.20.13.200:7687;
      server 10.20.0.157:7687;
   }
   server {
      listen 7687;
      proxy_responses 1;
      proxy_connect_timeout 20s;
      proxy_bind $server_addr:$remote_port;
      proxy_pass ongdb_7687;
   }
}

动态加载stream模块

查看动态模块

./configure --help | grep dynamic
--with-http_xslt_module=dynamic    enable dynamic ngx_http_xslt_module
--with-http_image_filter_module=dynamic   enable dynamic ngx_http_image_filter_module
--with-http_geoip_module=dynamic   enable dynamic ngx_http_geoip_module
--with-http_perl_module=dynamic    enable dynamic ngx_http_perl_module
--with-mail=dynamic                enable dynamic POP3/IMAP4/SMTP proxy module
--with-stream=dynamic              enable dynamic TCP/UDP proxy module
--with-stream_geoip_module=dynamic enable dynamic ngx_stream_geoip_module
--add-dynamic-module=PATH          enable dynamic external module
--with-compat                      dynamic modules compatibility

stream模块加载

sudo ./configure --with-stream=dynamic
sudo make && sudo make install

修改nginx.conf配置

load_module  modules/ngx_stream_module.so;
sudo reload nginx即可

nginx.conf一个完整的配置样例 ``` load_module modules/ngx_stream_module.so; #user nobody; worker_processes 8; worker_rlimit_nofile 65535; #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { worker_connections 4096; } 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; client_max_body_size 64m; proxy_read_timeout 3600s; #gzip on; #ONgDB SERVER upstream ongdb_http { least_conn; server 10.20.12.173:7474 backup; server 10.20.13.146:7474 backup; server 10.20.13.200:7474; server 10.20.0.157:7674; } server { listen 80; server_name testlab.ongdb.http.server; #charset koi8-r; #access_log logs/host.access.log main; location / { root html; index index.html index.htm; proxy_pass http://ongdb_http; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } #location = / { # proxy_pass http://ongdb_http; #} # location = /db/data/transaction/commit { # proxy_pass http://ongdb_http; #} #location = /db/data { # proxy_pass http://ongdb_http; #} #location = /db/manage { # proxy_pass http://ongdb_http; #} #location = /db/data/transaction { # proxy_pass http://ongdb_http; #} #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } # proxy the PHP scripts to Apache listening on 127.0.0.1:80 # #location ~ .php$ { # 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; # } #}

} stream { upstream ongdb_7687 { #hash X-Forwarded-For; # hash X-Real-Ip; least_conn; server 10.20.12.173:7687 backup; server 10.20.13.146:7687 backup; server 10.20.13.200:7687; server 10.20.0.157:7689; } server { listen 7687; proxy_responses 1; proxy_connect_timeout 20s; proxy_bind $server_addr:$remote_port; proxy_pass ongdb_7687; } } ```

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