From ef4b6b43b091b7a82e59aba6f4daaa3279f0f88f Mon Sep 17 00:00:00 2001
From: Johannes Scheuermann <johscheuer@users.noreply.github.com>
Date: Wed, 5 Feb 2020 19:30:59 +0100
Subject: [PATCH] Make CoreDNS docs for Multi Cluster more precise (#5819)

* Make CoreDNS docs for Multi Cluster more precise

* Add DNS port to forward command
---
 .../install/multicluster/gateways/index.md    | 41 ++++++++++++++++++-
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/content/en/docs/setup/install/multicluster/gateways/index.md b/content/en/docs/setup/install/multicluster/gateways/index.md
index b2125988ba..b64b73a1e5 100644
--- a/content/en/docs/setup/install/multicluster/gateways/index.md
+++ b/content/en/docs/setup/install/multicluster/gateways/index.md
@@ -183,7 +183,7 @@ EOF
 
 {{< /tab >}}
 
-{{< tab name="CoreDNS (>= 1.4.0)" category-value="coredns-after-1.4.0" >}}
+{{< tab name="CoreDNS (== 1.4.0)" cookie-value="coredns-1.4.0" >}}
 
 {{< text bash >}}
 $ kubectl apply -f - <<EOF
@@ -212,7 +212,44 @@ data:
     global:53 {
         errors
         cache 30
-        forward . $(kubectl get svc -n istio-system istiocoredns -o jsonpath={.spec.clusterIP})
+        forward . $(kubectl get svc -n istio-system istiocoredns -o jsonpath={.spec.clusterIP}):53
+    }
+EOF
+{{< /text >}}
+
+{{< /tab >}}
+
+{{< tab name="CoreDNS (>= 1.4.0)" cookie-value="coredns-after-1.4.0" >}}
+
+{{< text bash >}}
+$ kubectl apply -f - <<EOF
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: coredns
+  namespace: kube-system
+data:
+  Corefile: |
+    .:53 {
+        errors
+        health
+        ready
+        kubernetes cluster.local in-addr.arpa ip6.arpa {
+           pods insecure
+           upstream
+           fallthrough in-addr.arpa ip6.arpa
+        }
+        prometheus :9153
+        forward . /etc/resolv.conf
+        cache 30
+        loop
+        reload
+        loadbalance
+    }
+    global:53 {
+        errors
+        cache 30
+        forward . $(kubectl get svc -n istio-system istiocoredns -o jsonpath={.spec.clusterIP}):53
     }
 EOF
 {{< /text >}}