How to use the master node as worker node in Kubernetes cluster?

Question

I want to use the resources of master node of kubernetes cluster for my application which will be launched.

I have two nodes setup. I can launch a job from master node which is running on worker node. But I dont want to waste my Master node resources.

score 4 · Accepted Answer · answered Jun 17 '19 at 15:33

4

From here

By default, your cluster will not schedule pods on the master for security reasons. If you want to be able to schedule pods on the master, e.g. for a single-machine Kubernetes cluster for development, run:

kubectl taint nodes --all node-role.kubernetes.io/master-

answered Jun 17 '19 at 15:33

Anshul Jindal

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Running this command gives me an error "error: at least one taint update is required" – Gautham Sreenivasan Jul 07 '22 at 06:08

yasin lachini · Answer 2 · 2019-06-18T12:07:36.360

4

As this link

First, get the name of the master

kubectl get nodes

NAME     STATUS   ROLES    AGE   VERSION
yasin   Ready    master   11d   v1.13.4

as we can see there is one node with the name of yasin and the role is master. If we want to use it as worker we should run

kubectl taint nodes yasin node-role.kubernetes.io/master-

edited Jun 18 '19 at 12:07

answered Jun 17 '19 at 16:20

yasin lachini

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score 2 · Answer 3 · answered Jul 26 '22 at 15:46

2

according to this link:

kubectl taint nodes --all node-role.kubernetes.io/control-plane-

It seems the master- keyword is not working for the new kubernetes versions.

answered Jul 26 '22 at 15:46

Mehdi Hamidi

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1
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How to use the master node as worker node in Kubernetes cluster?

3 Answers3