NGINX load balancing - Proxy

Carlos Renato crenatovb at gmail.com
Tue Feb 15 15:31:06 UTC 2022


Hi, Josef

This what I get when trying to start NGINX with the simplified file.

[root at proxy conf.d]# cat webgateway.conf
upstream webgateway {
   server 192.168.239.151:9090;
   server 192.168.239.152:9090;
}

server {
   listen 9191;
   proxy_pass webgateway;
  }
}
[root at proxy conf.d]# nginx -t
nginx: [emerg] "proxy_pass" directive is not allowed here in
/etc/nginx/conf.d/webgateway.conf:8
nginx: configuration file /etc/nginx/nginx.conf test failed
[root at proxy conf.d]# systemctl status nginx
● nginx.service - The nginx HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor
preset: disabled)
   Active: failed (Result: exit-code) since Tue 2022-02-15 02:38:56 -03;
39s ago
  Process: 14415 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
  Process: 14700 ExecStartPre=/usr/sbin/nginx -t (code=exited,
status=1/FAILURE)
  Process: 14699 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited,
status=0/SUCCESS)
 Main PID: 14417 (code=exited, status=0/SUCCESS)

Feb 15 02:38:56 proxy.lab.local systemd[1]: Starting The nginx HTTP and
reverse proxy server...
Feb 15 02:38:56 proxy.lab.local nginx[14700]: nginx: [emerg] "proxy_pass"
directive is not allowed here in /etc/nginx/conf.d/webgateway.conf:8
Feb 15 02:38:56 proxy.lab.local nginx[14700]: nginx: configuration file
/etc/nginx/nginx.conf test failed
Feb 15 02:38:56 proxy.lab.local systemd[1]: nginx.service: control process
exited, code=exited status=1
Feb 15 02:38:56 proxy.lab.local systemd[1]: Failed to start The nginx HTTP
and reverse proxy server.
Feb 15 02:38:56 proxy.lab.local systemd[1]: Unit nginx.service entered
failed state.
Feb 15 02:38:56 proxy.lab.local systemd[1]: nginx.service failed.
[root at proxy conf.d]#


Thank You!

Em ter., 15 de fev. de 2022 às 12:25, Josef Vybíhal <josef.vybihal at gmail.com>
escreveu:

> Seems to me, that you are not using stream{} module as noted by
> Francis, and you are still putting server block to http{}. If not,
> post nginx -T
> J.
>
> On Tue, Feb 15, 2022 at 4:17 PM Carlos Renato <crenatovb at gmail.com> wrote:
> >
> > Hi Francis,
> > Thanks for the reply and willingness to help me.
> >
> > [root at proxy conf.d]# cat teste.conf
> > upstream webgateway {
> >     server 192.168.239.151:9090;
> >     server 192.168.239.152:9090;
> > }
> >
> > server {
> >     listen 9191;
> >     proxy_pass webgateway;
> > }
> > [root at proxy conf.d]#
> >
> > I cannot start NGINX.
> >
> > Feb 15 01:56:24 proxy.lab.local systemd[1]: Starting The nginx HTTP and
> reverse proxy server...
> > Feb 15 01:56:24 proxy.lab.local nginx[12274]: nginx: [emerg]
> "proxy_pass" directive is not allowed here in /etc/nginx/conf.d/teste.conf:8
> > Feb 15 01:56:24 proxy.lab.local nginx[12274]: nginx: configuration file
> /etc/nginx/nginx.conf test failed
> > Feb 15 01:56:24 proxy.lab.local systemd[1]: nginx.service: control
> process exited, code=exited status=1
> > Feb 15 01:56:24 proxy.lab.local systemd[1]: Failed to start The nginx
> HTTP and reverse proxy server.
> > Feb 15 01:56:24 proxy.lab.local systemd[1]: Unit nginx.service entered
> failed state.
> > Feb 15 01:56:24 proxy.lab.local systemd[1]: nginx.service failed.
> >
> > I can only start NGINX if the file is as below.
> >
> > upstream webgateway {
> >    server 192.168.239.151:9090;
> >    server 192.168.239.152:9090;
> > }
> >
> > server {
> >    listen 9191;
> >
> >    location / {
> >          proxy_set_header Host $host;
> >          proxy_set_header X-Real-IP $remote_addr;
> >          proxy_pass http://webgateway;
> >   }
> > }
> >
> > The behavior on the client is the same.
> > I can load HTTP page and cannot HTTPS. On the Web Gateway, I view the
> access logs with the client's IP.
> >
> > In tests, I noticed that the "http_pass" below the "listen", I can't
> start NGINX.
> > I had to also put it as "http" or http://webgateway;
> >
> > If you don't put the parameters below, the proxy tries to load the page
> http://webgateway.
> > proxy_set_header Host $host;
> >
> > The parameter below registers the IP-Real of the client in the proxy.
> > proxy_set_header X-Real-IP $remote_addr;
> >
> > Any tips? Thank You.
> >
> >
> >
> > Em ter., 15 de fev. de 2022 às 11:16, Francis Daly <francis at daoine.org>
> escreveu:
> >>
> >> On Tue, Feb 15, 2022 at 10:29:50AM -0300, Carlos Renato wrote:
> >>
> >> Hi there,
> >>
> >> > My file is like this.
> >>
> >> Untested by me, but I have edited this to now resemble what I think
> >> you want...
> >>
> >> > upstream webgateway {
> >> >    server 192.168.239.151:9090;
> >> >    server 192.168.239.152:9090;
> >> > }
> >> >
> >> > server {
> >> >    listen 9191;
> >> >    proxy_pass webgateway;
> >> > }
> >>
> >> ...that is, keep your upstream{} but remove the keepalive; adjust your
> >> server{} to just have "listen" and a different "proxy_pass"; and put
> >> the whole thing inside "stream{}" not "http{}".
> >>
> >> > I'm able to open HTTP requests in the client's browser.
> >> > The problem is being the HTTPS requests.
> >> > Is there any way for NGINX to receive the traffic and forward it
> (balanced)
> >> > to the proxy servers?
> >> > A simpler way. That way I could include the Web Gateway certificate
> in the
> >> > Windows client.
> >>
> >> If I have understood correctly what you are trying to do, the notes at
> >>
> https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/
> >> look relevant. That expands on what is at
> >> http://nginx.org/en/docs/stream/ngx_stream_core_module.html.
> >>
> >> Cheers,
> >>
> >>         f
> >> --
> >> Francis Daly        francis at daoine.org
> >> _______________________________________________
> >> nginx mailing list -- nginx at nginx.org
> >> To unsubscribe send an email to nginx-leave at nginx.org
> >
> >
> >
> > --
> >
> >
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