案例分析
Nginx 很大的一个作用就是作为web前端进行负载均衡和反向代理，但负载均衡的一个关键点就是状态检查，因为不能把请求分配给有故障的后端服务器
下面对一个案例进行分析
代码语言：javascript复制[root@i-1avyrt2d conf]# cat nginx.conf | grep -v "#" | grep -v "^$"
user nginx nginx;
worker_processes 4;
error_log /var/log/nginx/error.log error;
worker_rlimit_nofile 65535;
events {
worker_connections 65535;
use epoll;
}
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
keepalive_timeout 65;
include apps/proxy_tengine.conf;
}
[root@i-1avyrt2d conf]# cat apps/proxy_tengine.conf | grep -v "#" | grep -v "^$"
upstream test_apps {
server x.x.x.x:80 max_fails=1 fail_timeout=10s weight=25;
server y.y.y.y:80 max_fails=1 fail_timeout=10s weight=25;
server x.x.x.x:80 max_fails=1 fail_timeout=10s weight=25;
server y.y.y.y:80 max_fails=1 fail_timeout=10s weight=25;
check interval=5000 fall=5 rise=2 timeout=2000 default_down=false type=http;
check_http_send "HEAD /health_status HTTP/1.0rnrn";
check_http_expect_alive http_2xx http_3xx;
}
server {
listen 80;
server_name *.boohee.com _;
keepalive_timeout 30;
location /nginx-status {
stub_status on;
access_log off;
allow z.z.z.z;
allow i.i.i.i/28;
deny all;
}
location /status {
auth_basic "input your name and passsword";
auth_basic_user_file apps/status.passwd;
check_status;
access_log off;
allow all;
}
location / {
proxy_pass http://test_apps;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
[root@i-1avyrt2d conf]# ../sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@i-1avyrt2d conf]# kill -HUP `cat ../logs/nginx.pid `
[root@i-1avyrt2d conf]# 
