UPDATE!

It's better to apply the compression on the upstream because it gives us more flexibility, such as doing static compression to the maximum level.

nginx-ingress-brotli

Add Brotli Compression to the kubernetes-ingress image

To enable this feature

1. Edit your nginx-ingress.yaml

from:

...
spec:
  serviceAccountName: nginx-ingress
  containers:
  - image: nginx/nginx-ingress:2.1.0

    imagePullPolicy: IfNotPresent
    name: nginx-ingress
        ...

to this:

spec:
  serviceAccountName: nginx-ingress
  containers:
  - image: pujianto/nginx-ingress-brotli:2.1.0
    imagePullPolicy: IfNotPresent
    name: nginx-ingress

2. Update your nginx-config configMap

Make sure nginx to load the .so brotli modules via main-snippets in your nginx-config configMap

apiVersion: v1
kind: ConfigMap
metadata:
  creationTimestamp: null
  name: nginx-config
  namespace: nginx-ingress
data:
  http2: "true"
  main-snippets: |
    load_module "modules/ngx_http_brotli_filter_module.so";
    load_module "modules/ngx_http_brotli_static_module.so";    

3. Now you can load brotli module from your ingress resources

You can enable this using server-snippets

Example:

...
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: your-ingress
  annotations:
    nginx.org/server-snippets: |
      brotli on;
      brotli_static on;
 ...