{{- $gateway := index .Values "gateways" "istio-ingressgateway" }}
{{- if eq $gateway.injectionTemplate "" }}
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ $gateway.name }}
  namespace: {{ .Release.Namespace }}
  labels:
{{ $gateway.labels | toYaml | indent 4 }}
    release: {{ .Release.Name }}
    istio.io/rev: {{ .Values.revision | default "default" | quote }}

pilot:
  autoscaleEnabled: false
  traceSampling: 100
  resources:
    requests:
      cpu: 10m
      memory: 100Mi

gateways:
  istio-egressgateway:
    autoscaleEnabled: false
    resources:
      requests:
        cpu: 10m
        memory: 40Mi
  istio-ingressgateway:
    autoscaleEnabled: false
    ports:

pilot:
  autoscaleEnabled: false
  traceSampling: 100
  resources:
    requests:
      cpu: 10m
      memory: 100Mi

gateways:
  istio-egressgateway:
    autoscaleEnabled: false
    resources:
      requests:
        cpu: 10m
        memory: 40Mi
  istio-ingressgateway:
    autoscaleEnabled: false
    ports:

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  components:
    base:
      enabled: false
    pilot:
      enabled: false
    ingressGateways:
    - name: istio-ingressgateway
      enabled: false
    istiodRemote:

# with the appropriate version
version: 1.0.0
appVersion: 1.0.0
tillerVersion: ">=2.7.2"
description: Helm chart for deploying Istio gateways
keywords:
  - istio
  - ingressgateway
  - gateways
sources:
  - http://github.com/istio/istio
engine: gotpl

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: {{ $gateway.name }}-sds
  namespace: {{ .Release.Namespace }}
  labels:
    release: {{ .Release.Name }}
    istio.io/rev: {{ .Values.revision | default "default" | quote }}
    install.operator.istio.io/owning-resource: {{ .Values.ownerName | default "unknown" }}
    operator.istio.io/component: "IngressGateways"
roleRef:

                                            "filter_metadata": {
                                                "istio": {
                                                    "workload": "istio-ingressgateway;istio-system;istio-ingressgateway;latest;Kubernetes"
                                                }
                                            }
                                        },

{{ $gateway := index .Values "gateways" "istio-ingressgateway" }}
{{- if not $gateway.customService }}
apiVersion: v1
kind: Service
metadata:
  name: {{ $gateway.name }}
  namespace: {{ .Release.Namespace }}
  annotations:
    {{- range $key, $val := $gateway.serviceAnnotations }}
    {{ $key }}: {{ $val | quote }}
    {{- end }}
  labels:
{{ $gateway.labels | toYaml | indent 4 }}
    release: {{ .Release.Name }}

apiVersion: v1
kind: Namespace
metadata:
  name: user-ingressgateway-ns
  labels:

4. Modify the DNS server to add the A record of the new namespace
5. Check traffic
6. Delete the A record corresponding to the gateway in istio-system
7. Upgrade istio-system, disabling the ingressgateway
8. Delete the domain TLS certs from istio-system.