From 115d7975862f92fe5fbf21f3e3c4b2c914f98f4a Mon Sep 17 00:00:00 2001
From: Dominik Chilla <dominik@zwackl.de>
Date: Sat, 8 May 2021 18:43:57 +0200
Subject: [PATCH] k3d upstream DNS

---
 README.md | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/README.md b/README.md
index 61341a7..6634aee 100644
--- a/README.md
+++ b/README.md
@@ -130,6 +130,22 @@ Error: Kubernetes cluster unreachable
 $ kubectl config view --raw > ~/kubeconfig-k3d.yaml 
 $ export KUBECONFIG=~/kubeconfig-k3d.yaml
 ```
+If you need to change the upstream DNS-resolver:
+```
+kubectl -n kube-system edit configmap coredns
+```
+Find the line containing 
+```
+  forward . /etc/resolv.conf
+```
+and change the content to
+```
+  forward . ipaddr.of.your.dns-resolver
+```
+Finally redeploy the CoreDNS deployment with:  
+`kubectl -n kube-system rollout restart deployment coredns`
+
+**Note:** If you restart the cluster (`k3d cluster stop your-cluster` and `k3d cluster start your-cluster`), the changes will be gone!
 
 # Namespaces and resource limits <a name="user-content-namespaces-limits"></a>
 ```