动态流量切换路由降级方案

时间：2016-04-14 02:05:52 阅读：326 评论：0 收藏：0 [点我收藏+]

? ? ? ??1.整体架构方案

?
?

2.分解决执行

2.1动态流量切换选择模块ngx_dynamic_upstream,api+python方式(直接操作upstream里的server)

因为api接口操作不是太直观，在django上以web方式增删查改upstream ?

HTTP APIs

You can operate upstreams dynamically with HTTP APIs.

list

$ curl "http://127.0.0.1:6000/dynamic?upstream=zone_for_backends"
server 127.0.0.1:6001;
server 127.0.0.1:6002;
server 127.0.0.1:6003;
$

verbose

$ curl "http://127.0.0.1:6000/dynamic?upstream=zone_for_backends&verbose="
server 127.0.0.1:6001 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6002 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6003 weight=1 max_fails=1 fail_timeout=10;
$

update_parameters

$ curl "http://127.0.0.1:6000/dynamic?upstream=zone_for_backends&server=127.0.0.1:6003&weight=10&max_fails=5&fail_timeout=5"
server 127.0.0.1:6001 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6002 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6003 weight=10 max_fails=5 fail_timeout=5;
$

The supported parameters are blow.

weight
max_fails
fail_timeout

down

$ curl "http://127.0.0.1:6000/dynamic?upstream=zone_for_backends&server=127.0.0.1:6003&down="
server 127.0.0.1:6001 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6002 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6003 weight=1 max_fails=1 fail_timeout=10 down;
$

up

$ curl "http://127.0.0.1:6000/dynamic?upstream=zone_for_backends&server=127.0.0.1:6003&up="
server 127.0.0.1:6001 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6002 weight=1 max_fails=1 fail_timeout=10;
server 127.0.0.1:6003 weight=1 max_fails=1 fail_timeout=10;
$

add

$ curl "http://127.0.0.1:6000/dynamic?upstream=zone_for_backends&add=&server=127.0.0.1:6004"
server 127.0.0.1:6001;
server 127.0.0.1:6002;
server 127.0.0.1:6003;
server 127.0.0.1:6004;
$

remove

$?curl?"http://127.0.0.1:6000/dynamic?upstream=zone_for_backends&remove=&server=127.0.0.1:6003"
server?127.0.0.1:6001;
server?127.0.0.1:6002;
server?127.0.0.1:6004;

reference:

https://github.com/cubicdaiya/ngx_dynamic_upstream

2.2 路由方案nginx+lua+api

1.制定路由规则

2.对外提供路由api(权限控制,暂时只提供get)

3.一键持久化redis数据，一键回复redis数据

4.冗余，容错机制

封装redis路由，restful api