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This is a proud fork of label-watch repo, with just keeping things up-to-date and multi-arch ❤️
When Kubernetes cluster's created, worker nodes is tagged as none.
kube-node-role-label checks a specific label on worker node then create an label node-role.kubernetes.io/***
kube-node-role-label supports two mode of running. The first one is outside kubernetes cluster and inside
- You must have
kube configthat uses for connectingkubectl - Run command with the following flags:
$ kubectl get node
AME STATUS ROLES AGE VERSION
kind-control-plane Ready control-plane,master 39s v1.20.2
kind-worker NotReady <none> 8s v1.20.2
kind-worker2 NotReady <none> 8s v1.20.2
$ kubectl get node --show label
kind-control-plane Ready control-plane,master 54s v1.20.2 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=kind-control-plane,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node-role.kubernetes.io/master=
kind-worker Ready <none> 23s v1.20.2 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=kind-worker,kubernetes.io/os=linux
kind-worker2 Ready <none> 23s v1.20.2 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=kind-worker2,kubernetes.io/os=linux
$ kubectl label node kind-worker node-type="worker"
node/kind-worker labeled
$ kubectl label node kind-worker group="infra"
node/kind-worker labeled
$ kubectl label node kind-worker type="backend"
node/kind-worker labeled
$ kube-node-role-label -kubeconfig ~/.kube/config -label node-type,group,type
Running kube-node-role-label
Node kind-worker has been labelled successfully. Label: node-role.kubernetes.io/worker=true
Node kind-worker has been labelled successfully. Label: node-role.kubernetes.io/infra=true
Node kind-worker has been labelled successfully. Label: node-role.kubernetes.io/backend=true
$ kubectl get node
NAME STATUS ROLES AGE VERSION
kind-control-plane Ready control-plane,master 3m7s v1.20.2
kind-worker Ready backend,infra,worker 2m36s v1.20.2
kind-worker2 Ready <none> 2m36s v1.20.2- Modify ARGs in scripts/deployment.yml
- Deploy the kubernetes manifest from scripts/deployment.yml
$ kubectl get node
NAME STATUS ROLES AGE VERSION
kind-control-plane Ready control-plane,master 13m v1.20.2
kind-worker Ready <none> 12m v1.20.2
kind-worker2 Ready <none> 12m v1.20.2
$ kubectl apply -f deployment.yml
deployment.apps/kube-node-role-label configured
serviceaccount/kube-node-role-label created
clusterrole.rbac.authorization.k8s.io/kube-node-role-label created
clusterrolebinding.rbac.authorization.k8s.io/kube-node-role-label created
$ kubectl get node
NAME STATUS ROLES AGE VERSION
kind-control-plane Ready control-plane,master 14m v1.20.2
kind-worker Ready worker 13m v1.20.2
kind-worker2 Ready worker 13m v1.20.2Helm
$ helm repo add kube-node-role-label https://dntosas.github.io/kube-node-role-label/
$ helm repo update
$ helm upgrade -i kube-node-role-label/kube-node-role-label kube-node-role-label/kube-node-role-labelkube-node-role-label --help
Usage of kube-node-role-label:
-interval string
(optional) Start application in deamon mode. Supports format: 's', 'm', 'h'.
-kubeconfig string
(optional) absolute path to the kubeconfig file
-label string
Label that's checking on worker nodes then set label in format node-role.kubernetes.io/VALUE_FROM_LABEL=true.
Supports multiple labels: -label node-type,type,etc
Example:
$ kubectl get node NODE -o jsonpath='{.metadata.labels}' | jq
{
"beta.kubernetes.io/arch": "amd64",
....
"node-type": "worker"
}
$ kube-node-role-label -label node-type
$ kubectl get node NODE -o jsonpath='{.metadata.labels}' | jq
{
"beta.kubernetes.io/arch": "amd64",
....
"node-type": "worker",
"node-role.kubernetes.io/worker": "true"
}
-v Makes verbose output