Lua-Resty-Checkups基于Lua的upstream管理和健康检查模块
Lua-Resty-Checkups是一个基于lua的upstream管理和健康检查模块，由又拍云开源。
特点：
支持周期性upstream服务管理操作
支持管理和健康检查
支持upstream动态更新
有利于加权轮询或哈希平衡
支持 Nginx C upstream同步操作
可使用级别和键值实现集群
使用简介：
-- config.lua
_M = {}
_M.global = {
checkup_timer_interval = 15,
checkup_shd_sync_enable = true,
shd_config_timer_interval = 1,
}
_M.ups1 = {
cluster = {
{
servers = {
{host="127.0.0.1", port=4444, weight=10, max_fails=3, fail_timeout=10},
}
},
},
}
lua_package_path "/path/to/lua-resty-checkups/lib/checkups/?.lua;/path/to/config.lua;;";
lua_shared_dict state 10m;
lua_shared_dict mutex 1m;
lua_shared_dict locks 1m;
lua_shared_dict config 10m;
server {
listen 12350;
return 200 12350;
}
server {
listen 12351;
return 200 12351;
}
init_worker_by_lua_block {
local config = require "config"
local checkups = require "resty.checkups.api"
checkups.prepare_checker(config)
checkups.create_checker()
}
server {
location = /12350 {
proxy_pass http://127.0.0.1:12350/;
}
location = /12351 {
proxy_pass http://127.0.0.1:12351/;
}
location = /t {
content_by_lua_block {
local checkups = require "resty.checkups.api"
local callback = function(host, port)
local res = ngx.location.capture("/" .. port)
ngx.say(res.body)
return 1
end
local ok, err
-- connect to a dead server, no upstream available
ok, err = checkups.ready_ok("ups1", callback)
if err then ngx.say(err) end
-- add server to ups1
ok, err = checkups.update_upstream("ups1", {
{
servers = {
{host="127.0.0.1", port=12350, weight=10, max_fails=3, fail_timeout=10},
}
},
})
if err then ngx.say(err) end
ngx.sleep(1)
ok, err = checkups.ready_ok("ups1", callback)
if err then ngx.say(err) end
ok, err = checkups.ready_ok("ups1", callback)
if err then ngx.say(err) end
-- add server to new upstream
ok, err = checkups.update_upstream("ups2", {
{
servers = {
{host="127.0.0.1", port=12351},
}
},
})
if err then ngx.say(err) end
ngx.sleep(1)
ok, err = checkups.ready_ok("ups2", callback)
if err then ngx.say(err) end
-- add server to ups2, reset rr state
ok, err = checkups.update_upstream("ups2", {
{
servers = {
{host="127.0.0.1", port=12350, weight=10, max_fails=3, fail_timeout=10},
{host="127.0.0.1", port=12351, weight=10, max_fails=3, fail_timeout=10},
}
},
})
if err then ngx.say(err) end
ngx.sleep(1)
ok, err = checkups.ready_ok("ups2", callback)
if err then ngx.say(err) end
ok, err = checkups.ready_ok("ups2", callback)
if err then ngx.say(err) end
}
}
Lua 配置示例：
_M = {}
-- Here is the global part
_M.global = {
checkup_timer_interval = 15,
checkup_timer_overtime = 60,
default_heartbeat_enable = true,
checkup_shd_sync_enable = true,
shd_config_timer_interval = 1,
}
-- The rests parts are cluster configurations
_M.redis = {
enable = true,
typ = "redis",
timeout = 2,
read_timeout = 15,
send_timeout = 15,
protected = true,
cluster = {
{ -- level 1
try = 2,
servers = {
{ host = "192.168.0.1", port = 6379, weight=10, max_fails=3, fail_timeout=10 },
{ host = "192.168.0.2", port = 6379, weight=10, max_fails=3, fail_timeout=10 },
}
},
{ -- level 2
servers = {
{ host = "192.168.0.3", port = 6379, weight=10, max_fails=3, fail_timeout=10 },
}
},
},
}
_M.api = {
enable = false,
typ = "http",
http_opts = {
query = "GET /status HTTP/1.1\r\nHost: localhost\r\n\r\n",
statuses = {
[500] = false,
[502] = false,
[503] = false,
[504] = false,
},
},
mode = "hash",
cluster = {
dc1 = {
servers = {
{ host = "192.168.1.1", port = 1234, weight=10, max_fails=3, fail_timeout=10 },
}
},
dc2 = {
servers = {
{ host = "192.168.1.2", port = 1234, weight=10, max_fails=3, fail_timeout=10 },
}
}
}
}
_M.ups_from_nginx = {
timeout = 2,
cluster = {
{ -- level 1
upstream = "api.com",
},
{ -- level 2
upstream = "api.com",
upstream_only_backup = true,
},
},
}
return _M评论