Allow scheduling of pods on Kubernetes master?

Question

I set up Kubernetes on CoreOS on bare metal using the generic install scripts. It\'s running the current stable release, 1298.6.0, with Kubernetes version 1.5.4.

We\

Answer 1

For anyone using kops on AWS. I wanted to enable scheduling of Pods on master.

$ kubectl get nodes -owide was giving me this output:

NAME                                          STATUS
...
...
ip-1**-**-**-***.********.compute.internal    Ready                      node
ip-1**-**-**-***.********.master.internal     Ready,SchedulingDisabled   master
                                                    ^^^^^^^^^^^^^^^^^^
ip-1**-**-**-***.********.compute.internal    Ready                      node
...
...

And $ kubectl describe nodes ip-1**-**-**-***.********.master.internal:

...
...
Taints:             <none>
Unschedulable:      true
...                 ^^^^
...

Patching the master with this command:

$ kubectl patch node MASTER_NAME -p "{\"spec\":{\"unschedulable\":false}}"

worked for me and scheduling of Pods is now enabled.

Ref: https://github.com/kubernetes/kops/issues/639#issuecomment-287015882

Answer 2

If you are using Kubernetes 1.7 and above:

kubectl taint node mymasternode node-role.kubernetes.io/master:NoSchedule-