Shutdown hooks in OpenResty?

[Rollin Crittendon]

I was wondering if there is a shutdown-hook in OpenResty.

I would like to have something that cleans up resources on shutdown.

[DeJiang Zhu]

hi,

There is no shutdown-hook in OpenResty, but you can try like this:

init_worker_by_lua_file worker.lua

worker.lua

-----------------

local handler

local delay = 5

handle = function (premature)

    if ngx.worker.exiting() then

         --- cleanup()

         return

    end

    local ok, err = ngx.timer.at(delay, handle)

    if not ok then

        ngx.log(ngx.ERR, "failed to create timer: ", err)

    end

end

if not ok then

    ngx.log(ngx.ERR, "failed to create timer: ", err)

end

2015-08-31 22:43 GMT+08:00 Rollin Crittendon <rw...@rwag.net>:

I was wondering if there is a shutdown-hook in OpenResty.

I would like to have something that cleans up resources on shutdown.

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[Rollin Crittendon]

Thanks DeJiang,

I have a question about this one.

I put in a timer just like that, see it log, but it never shows that the ngx.worker.exiting() is true, always displays as false, UNLESS I reload instead of stop.

Does it actually shutdown on "nginx -s stop" but just not display it?

[DeJiang Zhu]

hi, Rollin

This works only nginx graceful shutdown. `nginx -s quit` shoud works fine.

http://nginx.org/en/docs/beginners_guide.html

[Rollin Crittendon]

Excellent, thank you Dejiang, this is working great for me.