What keywords did you search in kubeadm issues before filing this one?

dns, resolv.conf, coredns

BUG REPORT

Versions

kubeadm version (use kubeadm version): kubeadm version: &version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.0", GitCommit:"91e7b4fd31fcd3d5f436da26c980becec37ceefe", GitTreeState:"clean", BuildDate:"2018-06-27T20:14:41Z", GoVersion:"go1.10.2", Compiler:"gc", Platform:"linux/amd64"}

Environment:

• Kubernetes version (use kubectl version):

  Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.0", GitCommit:"91e7b4fd31fcd3d5f436da26c980becec37ceefe", GitTreeState:"clean", BuildDate:"2018-06-27T20:17:28Z", GoVersion:"go1.10.2", Compiler:"gc", Platform:"linux/amd64"}
  Server Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.0", GitCommit:"91e7b4fd31fcd3d5f436da26c980becec37ceefe", GitTreeState:"clean", BuildDate:"2018-06-27T20:08:34Z", GoVersion:"go1.10.2", Compiler:"gc", Platform:"linux/amd64"}
  

• Cloud provider or hardware configuration: baremetal (Intel Xeon, 2x2TB HDD, 32GB RAM)

• OS (e.g. from /etc/os-release): Ubuntu 18.04 LTS (Bionic Beaver)

• Kernel (e.g. uname -a): 4.15.0-24-generic

What happened?

After installation of kubernetes via kubeadm the coredns Pods won’t come up. kubectl get pods --all-namespaces prints this:

NAMESPACE     NAME                                  READY     STATUS    RESTARTS   AGE
kube-system   coredns-78fcdf6894-kgg8d              0/1       Pending   0          2h
kube-system   coredns-78fcdf6894-vl9jf              0/1       Pending   0          2h
kube-system   etcd-beetlejuice                      1/1       Running   0          2h
kube-system   kube-apiserver-beetlejuice            1/1       Running   0          2h
kube-system   kube-controller-manager-beetlejuice   1/1       Running   0          2h
kube-system   kube-proxy-bjdqd                      1/1       Running   0          2h
kube-system   kube-scheduler-beetlejuice            1/1       Running   0          2h

What you expected to happen?

coredns changes into status ‘Running’ and kubernetes is running without problems

How to reproduce it (as minimally and precisely as possible)?

This is the script I used for installation:

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF

apt-get update
apt-get install -y docker.io
apt-get install -y kubeadm

kubeadm init --pod-network-cidr=10.27.0.0/16

Anything else we need to know?

I think yes, but I don’t know what… If you need some kind of logs, just tell me.