Difference between revisions of "Kubectl get nodes"

From wikieduonline
Jump to navigation Jump to search
Tags: Mobile web edit, Mobile edit
 
(37 intermediate revisions by 5 users not shown)
Line 1: Line 1:
 
{{lowercase}}
 
{{lowercase}}
[[kubectl get]] nodes
+
https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
[[kubectl get nodes -w]]
+
 
[[kubectl get nodes --watch]]
+
* <code>[[kubectl get]] nodes</code>
[[kubectl get -h]]
+
* <code>[[kubectl get nodes -A]]</code>
 +
* <code>[[kubectl get nodes -o yaml]]</code>
 +
* <code>[[kubectl get nodes -A -o yaml]]</code>
 +
* <code>[[kubectl get nodes -o wide]]</code>
 +
* <code>[[kubectl get nodes -w]]</code>
 +
* <code>[[kubectl get nodes --watch]]</code>
 +
* <code>[[kubectl get nodes --label-columns]]</code>
 +
* <code>[[kubectl get -h]]</code>
 +
* <code>[[kubectl get nodes -A -o yaml]] | grep [[instance-type]]</code>
 +
* <code>kubectl get nodes -A -o yaml | egrep "node.kubernetes.io/instances-type|name: ip|capacity-type" | grep -v address | grep -v hostname</code>
 +
* <code>kubectl get nodes -A -o wide | awk '{print $6}' | grep -v [[INTERNAL-IP]]</code>
 +
* <code>kubectl get nodes -o json | [[jq]] ".items[] | {name:.metadata.name} + [[.status.capacity]]"</code>
 +
 
 +
 
 +
* [[ROLES]]: <code>[[control-plane]], [[master]]</code>
  
 
== Examples ==
 
== Examples ==
 
  [[kubectl get]] [[nodes]]
 
  [[kubectl get]] [[nodes]]
  NAME          STATUS  ROLES    AGE  [[Kubectl version|VERSION]]
+
  NAME          STATUS  [[ROLES]]   AGE  [[Kubectl version|VERSION]]
 
  node2          Ready    <none>  23h  v1.14.3-docker-2
 
  node2          Ready    <none>  23h  v1.14.3-docker-2
 
  ubuntu1804-1  Ready    master  23h  v1.14.3-docker-2
 
  ubuntu1804-1  Ready    master  23h  v1.14.3-docker-2
Line 19: Line 33:
 
  master  Ready    master  67m  v1.14.0
 
  master  Ready    master  67m  v1.14.0
 
  node01  Ready    <none>  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:
 
Official doc:
Line 29: Line 45:
  
 
== [[EKS]] ==
 
== [[EKS]] ==
  kubectl get nodes
+
  [[kubectl get]] nodes
 
  NAME                                          STATUS  ROLES    AGE    VERSION
 
  NAME                                          STATUS  ROLES    AGE    VERSION
 
  ip-192-168-72-109.us-east-2.compute.internal  Ready    <none>  9m38s  v[[1.21]].5-eks-bc4871b
 
  ip-192-168-72-109.us-east-2.compute.internal  Ready    <none>  9m38s  v[[1.21]].5-eks-bc4871b
Line 46: Line 62:
 
  ip-10-0-2-121.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
 
  [[kubectl get]] nodes
 
  [[Unable to connect to the server]]: dial tcp: lookup 00A50xxxx.gr7.us-east-2.eks.amazonaws.com: [[no such host]]
 
  [[Unable to connect to the server]]: dial tcp: lookup 00A50xxxx.gr7.us-east-2.eks.amazonaws.com: [[no such host]]
Line 57: Line 83:
 
  kubectl get nodes
 
  kubectl get nodes
 
  Unable to connect to the server: EOF
 
  Unable to connect to the server: EOF
 +
 +
[[kubectl get]] nodes
 +
error: [[exec plugin]]: [[invalid apiVersion]] "[[client.authentication.k8s.io]]/[[v1alpha1]]"
  
 
== [[Minikube]] ==
 
== [[Minikube]] ==
 +
 +
kubectl get nodes
 +
NAME      STATUS  ROLES          AGE  VERSION
 +
minikube  Ready    [[control-plane]]  38d  [[v1.27.4]]
  
 
  kubectl get nodes
 
  kubectl get nodes
Line 67: Line 100:
 
  NAME      STATUS  ROLES    AGE  VERSION
 
  NAME      STATUS  ROLES    AGE  VERSION
 
  minikube  Ready    master  12m  v1.18.0
 
  minikube  Ready    master  12m  v1.18.0
 +
 +
* Related: <code>[[minikube start]] --nodes 2 -p my-multinode-demo</code>
  
 
== [[KinD (Kubernetes in Docker)|kind]] ==
 
== [[KinD (Kubernetes in Docker)|kind]] ==
 +
 +
k get no
 +
NAME                STATUS  ROLES          AGE    VERSION
 +
kind-control-plane  Ready    [[control-plane]]  4m44s  v1.29.2
 +
 
  kubectl get nodes
 
  kubectl get nodes
 
  NAME                STATUS  ROLES                  AGE  VERSION
 
  NAME                STATUS  ROLES                  AGE  VERSION
 
  kind-control-plane  Ready    control-plane,master  10m  v1.20.2
 
  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
  
  
Line 93: Line 138:
 
* <code>[[kubectl drain]]</code>
 
* <code>[[kubectl drain]]</code>
 
* <code>[[kubectl uncordon]]</code>
 
* <code>[[kubectl uncordon]]</code>
* <code>[[cluster_version]]</code>
+
 
 +
* [[Terraform]]: <code>[[cluster_version]]</code>, <code>[[worker_groups]]</code>
 +
* <code>[[aws eks create-nodegroup]]</code>
 +
* <code>[[Kubernetes node-problem-detector]]</code>
 +
* <code>[[kubectl (alias)]]</code>
  
 
== See also ==
 
== See also ==
* {{kubectl get}}
+
* {{kubectl get nodes}}
* {{kubectl info}}
+
* {{kubectl nodes}}
* {{kubectl}}
+
* {{Kubernetes nodes}}
  
 
[[Category:Kubernetes]]
 
[[Category:Kubernetes]]

Latest revision as of 09:14, 27 June 2024

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


Examples[edit]

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[edit]

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[edit]

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[edit]

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[edit]

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

kind[edit]

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[edit]

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[edit]

See also[edit]

Advertising: