init_worker_by_lua ------------------ **语法:** *init_worker_by_lua <lua-script-str>* **环境:** *http* **阶段:** *starting-worker* 开启master进程模式，Nginx工作进程启动时执行指定的Lua代码。关闭master模式，将在[init_by_lua*](#init_by_lua)后直接运行。 这个指令经常被用来创建单进程的反复执行定时器（通过[ngx.timer.at](#ngxtimerat) Lua API创建），可以是后端服务健康检查，也可以是其他定时的日常工作。下面是个例子： ```nginx init_worker_by_lua ' local delay = 3 -- in seconds local new_timer = ngx.timer.at local log = ngx.log local ERR = ngx.ERR local check check = function(premature) if not premature then -- do the health check or other routine work local ok, err = new_timer(delay, check) if not ok then log(ERR, "failed to create timer: ", err) return end end end local ok, err = new_timer(delay, check) if not ok then log(ERR, "failed to create timer: ", err) return end '; ``` 这个指令是在`v0.9.5`发行版第一次引入。 [返回目录](#directives) > English source: init_worker_by_lua ------------------ **syntax:** *init_worker_by_lua <lua-script-str>* **context:** *http* **phase:** *starting-worker* Runs the specified Lua code upon every Nginx worker process's startup when the master process is enabled. When the master process is disabled, this hook will just run after [init_by_lua*](#init_by_lua). This hook is often used to create per-worker reoccurring timers (via the [ngx.timer.at](#ngxtimerat) Lua API), either for backend healthcheck or other timed routine work. Below is an example, ```nginx init_worker_by_lua ' local delay = 3 -- in seconds local new_timer = ngx.timer.at local log = ngx.log local ERR = ngx.ERR local check check = function(premature) if not premature then -- do the health check or other routine work local ok, err = new_timer(delay, check) if not ok then log(ERR, "failed to create timer: ", err) return end end end local ok, err = new_timer(delay, check) if not ok then log(ERR, "failed to create timer: ", err) return end '; ``` This directive was first introduced in the `v0.9.5` release. [Back to TOC](#directives)