nginx做负载均衡和反向代理

nginx做负载均衡。

我们了解负载均衡的实现，一般有3种形式。第一种，默认方式是1:1轮巡，第二种，权重，第三种，哈希。

实验的图如下：

当然是首先要配置好系统和4个LNMP结构。我们这里着重直说Nginx里面负载均衡的配置。

worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
error_log logs/error.log error;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
sendfile on;
keepalive_timeout 65;
#nginx vhosts config
include extra/www.conf;
include extra/bbs.conf;
include extra/blog.conf;
include extra/status.conf;
}

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这个是负载均衡器上的

worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
error_log logs/error.log error;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
upstream bbs_server_pools{
server 192.168.3.103 weight=3;
server 192.168.3.104 weight=2;
}
#nginx vhosts config
include extra/lb_bbs.conf;
}