[Spce-user] [EXTERNAL] Re: nginx and prometheus-nginx-exporter fail to load after reboot

[Cesar Mora]

I’m so sorry! My email client keeps messing up the TO address.

I found a conflict of port 8081 with nginx and tproxy, not sure if this is a part of nginx.

root at spce:/# grep -Rn "tproxy" /etc/ngcp-config/
/etc/ngcp-config/templates/etc/services.tt2:339:tproxy          8081/tcp                        # Transparent Proxy
/etc/ngcp-config/templates/etc/services.tt2:383:#nginx-status                   [% nginx.status_port %]/tcp # Conflicts with tproxy
/etc/ngcp-config/templates/etc/kamailio/proxy/proxy.cfg.tt2:921:        # for BYE, mark whether or not to stop rtproxy
root at spce:/#

Further digging, I only found 2 references to port 8081 on /etc/nginx/

root at spce:~# grep -Rn "8081" /etc/nginx/
/etc/nginx/sites-enabled/nginx-status:2:        listen localhost:8081;
/etc/nginx/sites-available/nginx-status:2:      listen localhost:8081;

But I’m guessing the sites-enabled entry is a symlink

Other than this, only tproxy refers to 8081 under the config.

> On Jan 27, 2025, at 6:08 AM, Michael Prokop via Spce-user <spce-user at lists.sipwise.com> wrote:
> 
> Hi,
> 
> * Cesar Mora [Mon Jan 27, 2025 at 10:02:36AM +0000]:
> 
>> Thanks for the reply! Yes, as I included in the previous message:
>> 
>> root at spce:/etc/nginx/sites-enabled# ls
>> ngcp-panel_admin_api  ngcp-panel_csc  ngcp-panel_system_api  nginx-status
>> 
>> There is no file or directory called nginx in /etc/nginx/sites-enabled/. What you see there is what is in there. Inside  /etc/nginx/sites-enabled are:
> [...]
> 
> It's about all the files inside the /etc/nginx directory, not a file
> named "nginx" inside /etc/nginx/sites-enabled.
> 
> But if there really is no other file referring to port 8081, this is
> about the issue that Guillem already pointed you to. quoting from
> his mail:
> 
> | This is a known limitation from this prometheus exporter, which fails
> | to start if nginx is not running. This has been fixed upstream with
> | https://github.com/nginx/nginx-prometheus-exporter/pull/504, so on
> | the future NGCP release where we rebase on top of Debian trixie,
> | we'll get that new fixed behavior.
> 
> PS: No need to Cc me, I'm subscribed to the mailing list.
> 
> regards
> -mika-
> 
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