The Kubernetes command-line tool, kubectl, allows you to run commands against Kubernetes clusters. You can use kubectl to deploy applications, inspect and manage cluster resources, and view logs.
Questions tagged [kubectl]
Kubernetes tag3648 questions
464
votes
11 answers
kubectl apply vs kubectl create?
What I understood by the documentation is that:
kubectl create
Creates a new k8s resource in the cluster
kubectl replace
Updates a resource in the live cluster
kubectl apply
If I want to do create + replace (Reference)
My questions are
Why…
Suresh Vishnoi
- 17,341
- 8
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- 55
282
votes
24 answers
Kubernetes pod gets recreated when deleted
I have started pods with command
$ kubectl run busybox \
--image=busybox \
--restart=Never \
--tty \
-i \
--generator=run-pod/v1
Something went wrong, and now I can't delete this Pod.
I tried using the methods described below but the Pod keeps…
yman
- 2,931
- 2
- 11
- 6
235
votes
6 answers
Kubernetes API - Get Pods on Specific Nodes
Reading the Kubernets documentation it looks to be possible to select a certain range of pods based on labels. I want to select all the pods on one node but I don't want to label each pod on their corresponding node.
Am I missing something from the…
Fran
- 3,693
- 4
- 19
- 19
234
votes
4 answers
Kubernetes: How do I delete clusters and contexts from kubectl config?
kubectl config view shows contexts and clusters corresponding to clusters that I have deleted.
How can I remove those entries?
The command
kubectl config unset clusters
appears to delete all clusters. Is there a way to selectively delete cluster…
Jeremy Lewi
- 6,386
- 6
- 22
- 37
232
votes
14 answers
kubectl logs - continuously
kubectl logs
gets latest logs from my deployment - I am working on a bug and interested to know the logs at runtime - How can I get continuous stream of logs ?
edit: corrected question at the end.
npr
- 4,325
- 4
- 20
- 30
210
votes
6 answers
How kubectl port-forward works?
kubectl exposes commands that can be used to create a Service for an application and assigns an IP address to access it from internet.
As far as I understand, to access any application within Kubernetes cluster there should be a Service resource…
karthikeayan
- 4,291
- 7
- 37
- 75
201
votes
15 answers
Restart container within pod
I have a pod test-1495806908-xn5jn with 2 containers. I'd like to restart one of them called container-test. Is it possible to restart a single container within a pod and how? If not, how do I restart the pod?
The pod was created using a…
s5s
- 11,159
- 21
- 74
- 121
192
votes
19 answers
Checking Kubernetes pod CPU and memory utilization
I am trying to see how much memory and CPU is utilized by a kubernetes pod. I ran the following command for this:
kubectl top pod podname --namespace=default
I am getting the following error:
W0205 15:14:47.248366 2767 top_pod.go:190] Metrics…
aniztar
- 2,443
- 4
- 18
- 24
176
votes
9 answers
How can I update a secret on Kubernetes when it is generated from a file?
I've created a secret using
kubectl create secret generic production-tls \
--from-file=./tls.key \
--from-file=./tls.crt
If I'd like to update the values - how can I do this?
Chris Stryczynski
- 30,145
- 48
- 175
- 286
165
votes
8 answers
kubectl get events only for a pod
When I run kubectl -n abc-namespace describe pod my-pod-zl6m6, I get a lot of information about the pod along with the Events in the end.
Is there a way to output just the Events of the pod either using kubectl describe or kubectl get commands?
Rakesh N
- 2,450
- 3
- 25
- 32
164
votes
13 answers
Listing all resources in a namespace
I would like to see all resources in a namespace.
Doing kubectl get all will, despite of the name, not list things like services and ingresses.
If I know the the type I can explicitly ask for that particular type, but it seems there is also no…
michas
- 25,361
- 15
- 76
- 121
155
votes
7 answers
Kubernetes sort pods by age
I can sort my Kubernetes pods by name using:
kubectl get pods --sort-by=.metadata.name
How can I sort them (or other resoures) by age using kubectl?
Eugene Platonov
- 3,145
- 3
- 26
- 20
140
votes
2 answers
Get error "unknown field "serviceName" in io.k8s.api.networking.v1.IngressBackend" when switch from v1beta1 to v1 in Kubernetes Ingress
I had the below YAML for my Ingress and it worked (and continues to work):
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: test-ingress
namespace: test-layer
annotations:
nginx.ingress.kubernetes.io/rewrite-target:…
Don Rhummy
- 24,730
- 42
- 175
- 330
135
votes
30 answers
did you specify the right host or port? error on Kubernetes
I have followed the helloword tutorial on http://kubernetes.io/docs/hellonode/.
When I run:
kubectl run hello-node --image=gcr.io/PROJECT_ID/hello-node:v1 --port=8080
I get:
The connection to the server localhost:8080 was refused - did you specify…
poiuytrez
- 21,330
- 35
- 113
- 172
132
votes
8 answers
How to pull environment variables with Helm charts
I have my deployment.yaml file within the templates directory of Helm charts with several environment variables for the container I will be running using Helm.
Now I want to be able to pull the environment variables locally from whatever machine the…
uberrebu
- 3,597
- 9
- 38
- 73