Kubectl get nodes

https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/

• kubectl get nodes
• kubectl get nodes -A
• kubectl get nodes -o yaml
• kubectl get nodes -A -o yaml
• kubectl get nodes -o wide
• kubectl get nodes -w
• kubectl get nodes --watch
• kubectl get nodes --label-columns
• kubectl get -h
• kubectl get nodes -A -o yaml | grep instance-type
• kubectl get nodes -A -o yaml | egrep "node.kubernetes.io/instances-type|name: ip|capacity-type" | grep -v address | grep -v hostname
• kubectl get nodes -A -o wide | awk '{print $6}' | grep -v INTERNAL-IP
• kubectl get nodes -o json | jq ".items[] | {name:.metadata.name} + .status.capacity"

• ROLES: control-plane, master

Examples

kubectl get nodes
NAME           STATUS   ROLES    AGE   VERSION
node2          Ready    <none>   23h   v1.14.3-docker-2
ubuntu1804-1   Ready    master   23h   v1.14.3-docker-2

kubectl get nodes
NAME             STATUS   ROLES    AGE   VERSION
172.17.255.254   Ready    master   11d   v1.14.8

kubectl get nodes 
NAME     STATUS   ROLES    AGE   VERSION 
master   Ready    master   67m   v1.14.0
node01   Ready    <none>   67m   v1.14.0

kubectl get nodes -o json | jq -r '.items[] | select(.status.capacity."nvidia.com/gpu" != null) | {name: .metadata.name, capacity: .status.capacity}'

Official doc:

kubectl get nodes
NAME                     STATUS       ROLES     AGE     VERSION
kube-worker-1            NotReady     <none>    1h      v1.23.3
kubernetes-node-bols     Ready        <none>    1h      v1.23.3
kubernetes-node-st6x     Ready        <none>    1h      v1.23.3
kubernetes-node-unaj     Ready        <none>    1h      v1.23.3

EKS

kubectl get nodes
NAME                                           STATUS   ROLES    AGE     VERSION
ip-192-168-72-109.us-east-2.compute.internal   Ready    <none>   9m38s   v1.21.5-eks-bc4871b
ip-192-168-8-185.us-east-2.compute.internal    Ready    <none>   9m34s   v1.21.5-eks-bc4871b

Terraform example:

kubectl get nodes
NAME                                       STATUS   ROLES    AGE   VERSION
ip-10-0-1-48.us-east-2.compute.internal    Ready    <none>   32m   v1.20.11-eks-f17b81
ip-10-0-1-85.us-east-2.compute.internal    Ready    <none>   33m   v1.20.11-eks-f17b81
ip-10-0-3-153.us-east-2.compute.internal   Ready    <none>   32m   v1.20.11-eks-f17b81

kubectl get nodes
NAME                                       STATUS   ROLES    AGE     VERSION
ip-10-0-1-149.us-east-2.compute.internal   Ready    <none>   5h40m   v1.20.11-eks-f17b81
ip-10-0-2-121.us-east-2.compute.internal   Ready    <none>   5h40m   v1.20.11-eks-f17b81

GKE

kubectl get nodes
NAME                                           STATUS                     ROLES    AGE    VERSION
gke-your-pool-1-040c69dc-gq56                   Ready                      <none>   30h    v1.21.11-gke.1900
gke-your-pool-2-040c69dc-ncj5                   Ready                      <none>   30h    v1.21.11-gke.1900
gke-your-pool-2-040c69dc-rkj2                   Ready                      <none>   30h    v1.21.11-gke.1900
gke-your-pool-3-737b2f5f-tbu5                   Ready,SchedulingDisabled   <none>   28h    v1.21.11-gke.1900

Errors

kubectl get nodes
Unable to connect to the server: dial tcp: lookup 00A50xxxx.gr7.us-east-2.eks.amazonaws.com: no such host

Solution: review ~/.kube/config

kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?

kubectl get nodes
Unable to connect to the server: EOF

kubectl get nodes
error: exec plugin: invalid apiVersion "client.authentication.k8s.io/v1alpha1"

Minikube

kubectl get nodes
NAME       STATUS   ROLES           AGE   VERSION
minikube   Ready    control-plane   38d   v1.27.4

kubectl get nodes
NAME       STATUS   ROLES                  AGE     VERSION
minikube   Ready    control-plane,master   3d21h   v1.21.2

kubectl get nodes
NAME       STATUS   ROLES    AGE   VERSION
minikube   Ready    master   12m   v1.18.0

• Related: minikube start --nodes 2 -p my-multinode-demo

kind

k get no
NAME                 STATUS   ROLES           AGE     VERSION
kind-control-plane   Ready    control-plane   4m44s   v1.29.2

kubectl get nodes
NAME                 STATUS   ROLES                  AGE   VERSION
kind-control-plane   Ready    control-plane,master   10m   v1.20.2

KillerCoda

kubectl get nodes
NAME           STATUS   ROLES           AGE   VERSION
controlplane   Ready    control-plane   23d   v1.25.3
node01         Ready    <none>          23d   v1.25.3

kubectl get nodes --show-labels (See also: Kubectl label)

kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?

kubectl get nodes -w

kubectl get nodes
error: You must be logged in to the server (Unauthorized)

Related

• kubectl get pods
• kubectl get svc
• kubectl describe nodes
• kubectl label
• ~/.kube/config
• kubectl drain
• kubectl uncordon

• Terraform: cluster_version, worker_groups
• aws eks create-nodegroup
• Kubernetes node-problem-detector
• kubectl (alias)

See also

• kubectl get nodes: -A
• K8s nodes: get | uncordon | cordon | drain | taint | describe | patch ] nodes
• Kubernetes nodes, node.kubernetes.io K8s Node controller (node-controller), MemoryPressure, DiskPressure, NodeHasDiskPressure, events, NodeNotReady, Node-pressure Eviction, RemovingNode, ProviderID, kubectl node-shell, kubectl describe nodes