kubectl-nodepools

kubectl-nodepools

A kubectl plugin for listing node pools/groups.

Installation

Make sure your Go bin directory is in your PATH:

export PATH="$(go env GOPATH)/bin:${PATH}"

You can install kubectl-nodepools using krew with the following command:

kubectl krew install nodepools

You can also install it using the following command:

go install github.com/grafana/kubectl-nodepools@latest

Usage

kubectl-nodepools accepts the default flags from kubectl, like --context. Pass --help for additional help.

Listing node pools/groups

kubectl nodepools list

Listing nodes in a given node pool/group

kubectl nodepools nodes $nodepool

Where $nodepool should be the name of an existing node pool.

Using a custom node pool label

If your cluster uses a different label than the ones supported in code, you can pass a custom label using the --label/-l flag or by setting the KUBE_NODEPOOLS_LABEL environment variable:

# list nodepools using a custom label
kubectl nodepools list --label 'custom.domain.io/fancy-node-label'

# list nodes with a nodepool using a custom label
kubectl nodepools nodes -l 'custom.domain.io/fancy-node-label' $nodepool

# using environment variable
export KUBE_NODEPOOLS_LABEL="custom.domain.io/fancy-node-label"
kubectl nodepools list
kubectl nodepools nodes $nodepool

Working with Karpenter

Because Karpenter does not provision node groups, it must be handled separately. By default, Karpenter nodes are listed in the format "(Karpenter) {Provisioner}". The Provisioner refers to the provisioner that Karpenter used to create this particular node. In order to search for nodes from particular provisioners, use the --label flag.

# list nodes with karpenter included
kubectl nodepools list

# list nodes for a particular karpenter provisioner
kubectl nodepools nodes --label 'karpenter.sh/provisioner-name' provisionerA