Add install guide for NGINX

website/src/content/docs/guides/ingress/nginx.md

@@ -2,6 +2,128 @@
 title: NGINX
 ---
 
+## Setup
+
+For NGINX we will setup 2 ingress controllers: Internal and External.
+Where External is either forwarded by your router or, for example, a cloudflare tunnel.
+Internal, however, is not routed anywhere and is used as a safe default to just have charts reached from your internal network only.
+
+### Example setup
+
+Here are example values to configure both Internal and External
+Please note the IP variables that need to be set to your specific configuration wishes and the use of metallb, that also has to be configured correctly
+
+#### Internal
+
+```
+    controller:
+      replicaCount: 2
+      service:
+        externalTrafficPolicy: Local
+        annotations:
+          metallb.io/ip-allocated-from-pool: main
+          metallb.io/loadBalancerIPs: ${NGINX_INTERNAL_IP}
+          metallb.universe.tf/ip-allocated-from-pool: main
+      ingressClassByName: true
+      ingressClassResource:
+        name: internal
+        default: true
+        controllerValue: k8s.io/internal
+      config:
+        allow-snippet-annotations: true
+        annotations-risk-level: Critical
+        client-body-buffer-size: 100M
+        client-body-timeout: 120
+        client-header-timeout: 120
+        enable-brotli: "true"
+        enable-ocsp: "true"
+        enable-real-ip: "true"
+        force-ssl-redirect: "true"
+        hide-headers: Server,X-Powered-By
+        hsts-max-age: "31449600"
+        keep-alive-requests: 10000
+        keep-alive: 120
+        proxy-body-size: 0
+        proxy-buffer-size: 16k
+        ssl-protocols: TLSv1.3 TLSv1.2
+        use-forwarded-headers: "true"
+      metrics:
+        enabled: true
+      extraArgs:
+        default-ssl-certificate: "clusterissuer/certificate-issuer-general-wildcard"
+        publish-status-address: ${NGINX_INTERNAL_IP}
+      terminationGracePeriodSeconds: 120
+      publishService:
+        enabled: false
+      resources:
+        requests:
+          cpu: 100m
+        limits:
+          memory: 500Mi
+    defaultBackend:
+      enabled: false
+```
+
+#### External
+
+```
+
+  values:
+    controller:
+      replicaCount: 2
+      service:
+        externalTrafficPolicy: Local
+        annotations:
+          metallb.io/ip-allocated-from-pool: main
+          metallb.io/loadBalancerIPs: ${NGINX_EXTERNAL_IP}
+          metallb.universe.tf/ip-allocated-from-pool: main
+      ingressClassByName: true
+      ingressClassResource:
+        name: external
+        default: false
+        controllerValue: k8s.io/external
+      config:
+        allow-snippet-annotations: true
+        annotations-risk-level: Critical
+        client-body-buffer-size: 100M
+        client-body-timeout: 120
+        client-header-timeout: 120
+        enable-brotli: "true"
+        enable-ocsp: "true"
+        enable-real-ip: "true"
+        force-ssl-redirect: "true"
+        hide-headers: Server,X-Powered-By
+        hsts-max-age: "31449600"
+        keep-alive-requests: 10000
+        keep-alive: 120
+        proxy-body-size: 0
+        proxy-buffer-size: 16k
+        ssl-protocols: TLSv1.3 TLSv1.2
+        use-forwarded-headers: "true"
+      metrics:
+        enabled: true
+      extraArgs:
+        default-ssl-certificate: "clusterissuer/certificate-issuer-general-wildcard"
+        publish-status-address: ${NGINX_EXTERNAL_IP}
+      terminationGracePeriodSeconds: 120
+      publishService:
+        enabled: false
+      resources:
+        requests:
+          cpu: 100m
+        limits:
+          memory: 500Mi
+    defaultBackend:
+      enabled: false
+```
+
+### Using the IngressClasses
+
+You can set charts to use either of them by specifying either:
+`ingressClassName: internal`
+or
+`ingressClassName: external`
+
 
 ## Annotations Examples