[nginx] dso

[洪志道]

Hi,

Assume Now it runs well, then I change nginx source code, should I compile
the module files again?
It seems It will get wrong when new nginx rpm run together with old so
files.

Thanks!

B.R.

2016-04-28 3:02 GMT+08:00 Igor Sysoev <igor at sysoev.ru>:

> On 27 Apr 2016, at 19:32, 洪志道 <hongzhidao at gmail.com> wrote:
>
> Get.
> In production, there may be some possibility with load_module directive.
> 1. add new module: load_module  modules/some_module.so;   [?]
> 2. remove exist load_module directive, just comment out.   [?]
> 3. directive not changed but the so file changed.   [kill -USR2 `cat
> nginx.pid`; sleep 2; kill -QUIT `cat nginx.pid.oldbin`]
> And how to deal with?
>
>
> USR2/QUIT is online binary upgrade procedure:
> http://nginx.org/en/docs/control.html#upgrade
> And this procedure should be used to change and to unload modules.
>
>
> --
> Igor Sysoev
> http://nginx.com
>
> 2016-04-28 0:08 GMT+08:00 Igor Sysoev <igor at sysoev.ru>:
>
>> On 27 Apr 2016, at 18:51, 洪志道 <hongzhidao at gmail.com> wrote:
>>
>> Thanks for your reply.
>>
>> Is it the only way to solve the problem?
>>
>>
>> This is a way to reload a module in production without
>> service interruption.
>>
>> I think it will be common that developers try to use dso instead of
>> static module.
>>
>>
>> Developers can simply stop and start nginx again.
>>
>> --
>> Igor Sysoev
>> http://nginx.com
>>
>> Nginx offical site points out we could load in so modules using reload or
>> restart, but it seems forget to instruct the details about reload.
>> And it's a great design, thanks again.
>>
>> 2016-04-27 19:22 GMT+08:00 Igor Sysoev <igor at sysoev.ru>:
>>
>>> On 27 Apr 2016, at 12:10, 洪志道 <hongzhidao at gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> for example following config:
>>>
>>> daemon  on;
>>> ...
>>> load_module  modules/ngx_http_test_module.so;
>>> ...
>>>
>>> > start nginx
>>> > change ngx_http_test_module.c, then regenerate so file
>>> > kill -HUP pid
>>>
>>> I found nginx still run the old so file (load first time), and how to
>>> work with new so file?
>>>
>>> I tried .../sbin/nginx -s reload, It works as I expected. It seems there
>>> is some differences in 'kill -HUP' and 'sbin/nginx -s reload’;
>>>
>>>
>>> kill -USR2 `cat nginx.pid`; sleep 2; kill -QUIT `cat nginx.pid.oldbin`
>>>
>>>
>>> --
>>> Igor Sysoev
>>> http://nginx.com
>>>
>>
>>
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>>
>
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