I have setup nginx ingress controller configurations under the data property as shown in the below yaml file.

1. I would like to know is this the correct way to set nginx configurations instead of providing a nginx.conf file.

2. Secondly I would like to find out whether the provided configurations are set. To find whether the new configurations are applied, should I exec into the pod and run nginx -T or is there any other way to find it?

kind: ConfigMap
apiVersion: v1
metadata:
  name: nginx-configuration
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
data:
  worker-processes: "24"
  worker-connections: "100000"
  worker-rlimit-nofile: "102400"
  worker-cpu-affinity: "auto 111111111111111111111111"
  keepalive: "200"
  main-template: | 
   user nginx;
   worker_processes  {{.WorkerProcesses}};
   {{- if .WorkerRlimitNofile}}
   worker_rlimit_nofile {{.WorkerRlimitNofile}};{{end}}
   {{- if .WorkerCPUAffinity}}
   worker_cpu_affinity {{.WorkerCPUAffinity}};{{end}}
   {{- if .WorkerShutdownTimeout}}
   worker_shutdown_timeout {{.WorkerShutdownTimeout}};{{end}}
   daemon off;

   error_log  /var/log/nginx/error.log {{.ErrorLogLevel}};
   pid        /var/run/nginx.pid;

   {{- if .MainSnippets}}
   {{range $value := .MainSnippets}}
   {{$value}}{{end}}
   {{- end}}

   events {
       worker_connections  {{.WorkerConnections}};
   }

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

       sendfile        on;
       access_log  off;
       tcp_nopush  on;
       tcp_nodelay on;

       keepalive_timeout  315;
       keepalive_requests 10000000;

       #gzip  on;   
        ...
   }

---
kind: ConfigMap
apiVersion: v1
metadata:
  name: tcp-services
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---
kind: ConfigMap
apiVersion: v1
metadata:
  name: udp-services
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nginx-ingress-serviceaccount
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx