weight round robin for Openresty. Similar to ngx_http/stream_upstream_round_robin module.
http {
...
init_by_lua_block {
local wrr = require "resty.wrr"
local servers = {
{addr="192.168.0.1:80",weight=1,max_fails=5,fail_timeout=3,max_conns=1000,},
{addr="192.168.0.2:80",weight=2,max_fails=5,fail_timeout=3,max_conns=2000,},
}
rrp = wrr.new(servers)
}
server {
listen 8080;
location / {
access_by_lua_block {
local peer = rrp:init()
local s = peer:get()
...
peer:free()
}
proxy_pass ups;
}
}
}syntax: rrp, err = wrr.new(servers)
Creates a wrr object by servers. the failures, returns nil and error.
syntax: peer = rrp:init(tries?)
Creates a object for request. the tries is max retry times.
peer.tries: remaining retry times.
syntax: server = peer:get()
Pick a upstream server in peer object. No server is available, returns nil.
syntax: peer:free(state?)
Free the pick server and report a health failure, the state is wrr.PEER_FAILED(failed) or 0(OK).
wenqiang li(vislee)
This module is licensed under the BSD license.
Copyright (C) 2021-, by vislee.
All rights reserved.