Debug headers inside a kubernetes cluster behind a nginx ingress

header_debug.kubernetes.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: debug-headers
  namespace: your-namespace
  labels:
    app: debug-headers
spec:
  selector:
    matchLabels:
      app: debug-headers
  replicas: 1
  template:
    metadata:
      labels:
        app: debug-headers
    spec:
      containers:
        - image: mendhak/http-https-echo
          name: debug-headers
          ports:
            - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: debug-headers
  namespace: your-namespace
spec:
  type: ClusterIP
  selector:
    app: debug-headers
  ports:
    - name: http
      port: 80
      protocol: TCP
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: debug-headers
  namespace: open-source-tool
  annotations:
    kubernetes.io/ingress.class: nginx
spec:
  tls:
    - secretName: internal-tls-certs
      hosts:
        - my.domain
  rules:
    - host: my.domain
      http:
        paths:
          - pathType: Prefix
            path: "/"
            backend:
              service:
                name: debug-headers
                port:
                  name: http