Add custom 404.html to nginx default backend

values/ingress-nginx/manifests/custom-error-pages.cm.yaml

@@ -0,0 +1,8 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: custom-error-pages
+  namespace: ingress-nginx
+data:
+  "404": |
+    <span>Oceanbox is having a woopsie dupsie. uwu</span>

values/ingress-nginx/values/ingress-nginx.yaml.gotmpl

@@ -132,3 +132,21 @@ defaultBackend:
      operator: Exists
      effect: NoSchedule
 
+  ## Additional volumeMounts to the default backend container.
+  #  - name: copy-portal-skins
+  #   mountPath: /var/lib/lemonldap-ng/portal/skins
+  extraVolumeMounts:
+    - name: custom-error-pages
+      mountPath: /www
+
+  ## Additional volumes to the default backend pod.
+  #  - name: copy-portal-skins
+  #    emptyDir: {}
+  extraVolumes:
+  - name: custom-error-pages
+    configMap:
+      name: custom-error-pages
+      items:
+      - key: "404"
+        path: "404.html"
+