最近有一个需求,就是需要使用 nginx 反向代理 websocket,经过查找一番资料,目前已经测试通过,本文只做一个记录
1.下载 tengine 最近的源码
2.安装基础的依赖包
3.解压编译安装
nginx.conf 的配置如下:
error_log logs/error.log;
pid logs/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;
events {
use epoll;
worker_connections 65535;
}
# load modules compiled as Dynamic Shared Object (DSO)
#
#dso {
# load ngx_http_fastcgi_module.so;
# load ngx_http_rewrite_module.so;
#}
http {
include mime.types;
default_type application/octet-stream;
server_names_hash_bucket_size 128;
client_header_buffer_size 4k;
large_client_header_buffers 4 32k;
client_max_body_size 80m;
sendfile on;
tcp_nopush on;
client_body_timeout 5;
client_header_timeout 5;
keepalive_timeout 5;
send_timeout 5;
open_file_cache max=65535 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 1;
tcp_nodelay on;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;
client_body_buffer_size 512k;
proxy_connect_timeout 5;
proxy_read_timeout 60;
proxy_send_timeout 5;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
proxy_temp_path /dev/shm/temp;
proxy_cache_path /dev/shm/cache levels=2:2:2 keys_zone=cache_go:200m inactive=5d max_size=7g;
log_format log_access '$remote_addr - $remote_user [$time_local] "$request" "$request_time" "$upstream_response_time"'
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" $http_x_forwarded_for $host $hostname' ;
#websocket 需要加下这个
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
include /home/apps/tengine/conf/test.com;
}
test.com 的配置文件内容:
server {
listen 80;
server_name test.com;
#charset koi8-r;
#access_log logs/host.access.log main;
location ^~ /websocket {
proxy_pass http://test.com;
proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}
解析 map 指令
上面 nginx.conf 配置中的 map $http_upgrade $connection_upgrade 的作用,参考 http://www.ttlsa.com/nginx/using-nginx-map-method/
该作用主要是根据客户端请求中 $http_upgrade 的值,来构造改变 $connection_upgrade 的值,即根据变量 $http_upgrade 的值创建新的变量 $connection_upgrade,创建的规则就是 {} 里面的东西,请见配置:
其中的规则没有做匹配,因此使用默认的,即 $connection_upgrade 的值会一直是 upgrade。然后如果 $http_upgrade为空字符串的话,那值会是 close。个人的理解!