Kubernetes Nginx ingress setup for Strapi with x-forwarded headers

If you’re using Strapi and you’re trying to figure out how to setup Nginx Ingress for Kubernetes or you are trying to solve one of the following issues:
https://github.com/strapi/strapi/issues/3462
https://github.com/strapi/strapi/issues/2424

Here’s the ingress configuration, and your nginx ingress helm chart value you should be editing:

#1 Provide use-forwarded-headers in your helm chart’s controller config params

# values.yaml
controller:
  config:
    use-forwarded-headers: "true"

#2 My ingress config

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/use-regex: "true"
    nginx.ingress.kubernetes.io/proxy-body-size: 200m
    nginx.ingress.kubernetes.io/enable-cors: "true"
    nginx.ingress.kubernetes.io/cors-allow-origin: "*"
    nginx.ingress.kubernetes.io/cors-allow-headers: "*"
    nginx.ingress.kubernetes.io/cors-allow-credentials: "true"
    nginx.ingress.kubernetes.io/cors-allow-methods: "*"
    nginx.ingress.kubernetes.io/proxy-connect-timeout: "30s"
    nginx.ingress.kubernetes.io/proxy-read-timeout: "20s"
    nginx.ingress.kubernetes.io/client-body-buffer-size: "50m"
    kubernetes.io/ingress.class: nginx
  name: strapi-ingress
spec:
  rules:
  - host: mydomain.com
    http:
      paths:
      - path: /
        backend:
          serviceName: angular-ui
          servicePort: 80
      # Depends on the plugins you use
      - path: /(admin|plugins|email|settings-manager|documentation|content-type-builder|upload|users-permissions|users|content-manager|auth)/?.*$
        backend:
          serviceName: strapi
          servicePort: 1337

#3 Custom nginx ingress installation

You might want to create a custom configmap to us within your nginx ingress installation like the following:

apiVersion: v1
data:
  use-forwarded-headers: "true"
kind: ConfigMap
metadata:
  name: nginx-configuration

#4 Digital Ocean k8s

or if you are running your k8s in Digital Ocean you need to add few more config params, but I’d suggest you read this full blog post:

https://www.digitalocean.com/community/questions/how-to-set-up-nginx-ingress-for-load-balancers-with-proxy-protocol-support?answer=50313

#5 Nginx map directive

If you are simply using Nginx as a load balancer, you might want to setup the map directive outside your server block like the solution provided in this comment: https://github.com/strapi/strapi/issues/2424#issuecomment-445964719