How can I get nginx-rtmp-module stats for all workers?

[Roman Arutyunyan]

Hi,

On Thu, May 11, 2017 at 09:42:35AM +0000, Alexander Chekalin wrote:
> Thank you for the patch (and your attention). The only thing I don’t like in the idea is that patch is against nginx source, right? Just in a case nginx will ever change the source (and the patch is a bit outdated, isn’t it?) we can see problems on patching newer versions.
> 
> Just out of curiosity, is it possible to have one (accumulated) stat from all workers? I’m not a programmer by myself but I can try to find someone who can do that if the change is easy to implement.

It does not look easy.  Otherwise I would have done this long ago.
Probably a solution is to store statistics in shared memory and make workers
update it regularly.

> Or maybe it is possible to output stats for different workers without patching nginx code itself (e.g. maybe via different URIs)?

Currently not.

> Thank you again for your module and you attention for us your users! :)
> 
> 
> > On 10 May 2017, at 17:25, Roman Arutyunyan <arut at nginx.com> wrote:
> > 
> > Hello,
> > 
> > On Wed, May 10, 2017 at 03:33:26PM +0000, Alexander Chekalin wrote:
> >> Hello,
> >> 
> >> I’ve set up nginx with nginx-rtmp-module as a NGINX-based Media Streaming Server, and it works fine, but now I try to get stats for this server. 
> >> 
> >> General approach is to use 
> >> 
> >> location /stat {  rtmp_stat all; }
> >> 
> >> which produce xml that can be parsed nicely, but my suspicions are that I got stats for one worker random worker on each poll (not accumulated stats for all workers). The host itself is 4-cores, so I have 4 workers running and I think I got confusing stats since each poll brings me stats for random worker.
> >> 
> >> Is there any way I can use to get cumulated stats for all workers on host?
> > 
> > Yes, RTMP statistics is only available for a single worker.
> > For multi-worker statictics there was a patch "per-worker-listener" at
> > https://url.serverdata.net/?aZyQRg2CGut2qgyHrdHxA3r5xEAceK79DVxYd3Bfe3feJf7HCqpY0DPDS06nZJMU0e8eXTfFB-VA1xp75D9zo3w~~.
> > However, this solution is not perfect.
> > 
> > -- 
> > Roman Arutyunyan
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> 
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-- 
Roman Arutyunyan