备注:
Nchan 的数据持久化,以及ha 都是通过redis实现的,如果要做到无单点可以使用redis cluster
同对于Nchan server 进行多副本
1. 安装
下载nginx or openresty 源码同时下载Nchan 源码进行编译打包即可
2. 简单sub/pub 配置
location 配置
location = /sub {
nchan_subscriber;
nchan_channel_id $arg_id;
nchan_use_redis on; // 关键
}
location = /pub {
nchan_publisher;
nchan_channel_id $arg_id;
nchan_use_redis on; // 关键
}
redis server 配置
nchan_redis_url "redis://127.0.0.1:6379";
3. ha 配置(伪ha,实际就是nginx 反向代理两台编译了Nchan 的nginx)
lb 配置
server:
server {
listen 8089;
location / {
proxy_pass http://ws;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}
upstream:
upstream ws {
server xxxxxx:80 weight=2 max_fails=2 fail_timeout=30s;
server xxxxxxxx:8090 weight=1 max_fails=2 fail_timeout=30s;
}
Nchan 配置:
参考上面的,必须在一台机器
redis cluster 版本的配置
http {
upstream redis_cluster {
nchan_redis_server redis://127.0.0.1:7000;
nchan_redis_server redis://127.0.0.1:7001;
nchan_redis_server redis://127.0.0.1:7002;
# you don't need to specify all the nodes, they will be autodiscovered
# however, it's recommended that you do specify at least a few master nodes.
}
server {
listen 80;
location ~ /sub/(\w+)$ {
nchan_subscriber;
nchan_channel_id $1;
nchan_redis_pass redis_cluster;
}
location ~ /pub/(\w+)$ {
nchan_publisher;
nchan_channel_id $1;
nchan_redis_pass redis_cluster;
}
}
}
4. 测试
// http post data
curl \
-H "Content-type: application/json" \
-d '{"name": "dalong","age":333}' \
'http://xxxxx:8089/pub?id=demo'
// browser recived data
var ws =new WebScoket("ws://xxxxx:8089/sub?id=demo")
ws.onMessage=funciton(data){
console.log(data)
}
打开多个浏览器会发现数据是同步的,没有添加redis 的会出现数据无法接受到了
5. redis 数据存储查看
127.0.0.1:6379> KEYS *
1) "{channel:/demo}"
2) "{channel:/demo}:msg:1511175437:2"
3) "{channel:/demo}:msg:1511175436:2"
4) "{channel:/demo}:msg:1511175435:0"
5) "{channel:/demo}:msg:1511175437:0"
6) "{channel:/demo}:messages"
7) "{channel:/demo}:msg:1511175436:0"
8) "{channel:/demo}:msg:1511175437:3"
9) "{channel:/demo}:msg:1511175424:1"
10) "{channel:/demo}:msg:1511175437:1"
11) "{channel:/demo}:msg:1511175436:3"
12) "{channel:/demo}:msg:1511175436:1"