Auto number of worker processes, and default number of connections

[RealOrangeOne]

Description:

Set the number workers automatically based on the number of available cores.

Benefits of this PR and context:

This allows NGINX to better take advantage of multiple cores.

How Has This Been Tested?

Source / References:

https://nginx.org/en/docs/ngx_core_module.html#worker_processes

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://lsio-ci.ams3.digitaloceanspaces.com/lspipepr/baseimage-nginx/282077be-pkg-282077be-pr-53/index.html
https://lsio-ci.ams3.digitaloceanspaces.com/lspipepr/baseimage-nginx/282077be-pkg-282077be-pr-53/shellcheck-result.xml

[aptalca]

Thanks for the PR, but this has not been tested extensively in docker.

Also, nginx.conf is fully user configurable, so this can easily be applied runtime.

[RealOrangeOne]

@aptalca

nginx.conf is fully user configurable

it is, however requires the end user to maintain the config file for themselves, which is a lot more effort for the sake of 2 (primarily 1) changes. Could be done by modifying command, but again that's more changes.

this has not been tested extensively in docker.

I'd be interested to know what makes you say this. I've been running it fine in production for years, and default nginx container has exactly these settings:

$ docker run --rm nginx:alpine cat /etc/nginx/nginx.conf
user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

Believe that counts as enough testing?