Nginx负载均衡服务器实现会话粘贴的几种方式
1、使用Nginx 的ip_hash作为负载均衡服务并支持Session sticky
2、使用nginx sticky第三方模块实现基于cookie的负载均衡
3、使用nginx的map指令根据cookie分流：
map $COOKIE_abcdexpid $group {
~*1$ apache001;
~*2$ apache002;
default root;
}
upstream apache001 {
server 192.168.1.1:8080 weight=1 max_fails=1 fail_timeout=30s;
}
upstream apache002 {
server 192.168.1.2:8080 weight=1 max_fails=1 fail_timeout=30s;
}
upstream root {
server 192.168.1.0:8080 weight=1 max_fails=1 fail_timeout=30s;
}
server {
listen 8080;
server_name neoremind.net;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" "group=$group"'
'"$http_user_agent" $gzip_ratio $request_time "$http_x_forwarded_for"';
access_log logs/access_log main;
error_log logs/error_log;
location / {
proxy_pass http://$group;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
4、利用set和if…else… 根据cookie分流
upstream apache001 {
server 192.168.1.1:8080 weight=1 max_fails=1 fail_timeout=30s;
}
upstream apache002 {
server 192.168.1.2:8080 weight=1 max_fails=1 fail_timeout=30s;
}
upstream root {
server 192.168.1.0:8080 weight=1 max_fails=1 fail_timeout=30s;
}
server {
listen 8080;
server_name beidoutest.baidu.com;
#match cookie
set $group "root";
if ($http_cookie ~* "abcdexpid=([^;]+)(1$)"){
set $group apache001;
}
if ($http_cookie ~* "abcdexpid=([^;]+)(2$)"){
set $group apache002;
}
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" "group=$group"'
'"$http_user_agent" $gzip_ratio $request_time "$http_x_forwarded_for"';
access_log logs/access_log main;
error_log logs/error_log;
location / {
proxy_pass http://$group;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
5、nginx1.7.2版本后提供的hash方法：
# http context
upstream backend_hosts {
hash $cookie_JSESSIONID consistent;
server host1.example.com;
server host2.example.com;
server host3.example.com;
}