Question: How can I schedule master node running pod/service as worker node?
By deafult, only worker node could run the pod, master only response for the scheduler/configuration.
$ kubectl get nodes -o json | jq .items[].spec.taints
[
{
"effect": "NoSchedule",
"key": "node-role.kubernetes.io/master"
}
]
$ kubectl get nodes -o json | grep master
"node-role.kubernetes.io/master": ""
"key": "node-role.kubernetes.io/master"
However, you could disable the “NoSchedule” property so master node could run pod as well.
$ kubectl taint nodes --all node-role.kubernetes.io/master- node/k8s-all-in-one untainted
$ kubectl get nodes -o json | jq .items[].spec.taints null
$ kubectl get nodes -o json | grep master
"node-role.kubernetes.io/master": ""