kubectl command

kubectl

common

version

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kubectl version
kubectl api-versions

health

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# check kubernetes inner ip 
kubectl get svc kubernetes -n default

# check api server
kubectl get componentstatuses

# check crd
kubectl get crd | grep cert-manager

# check all pods
kubectl get pods -A

namespace

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kubectl get namespaces

# delete all resource by specify namespace
kubectl delete all --all -n <namespace>

node

label

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# show all labels
kubectl get nodes --show-labels

# add label on node
kubectl label node <node-name> <label-key>=<label-value>

# remove label from node
kubectl label node <node-name> <label-key>-
# kubectl label nodes sd-shangdi-ceph17 dingofs-csi-node-

taint

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# check node is taint or not
kubectl describe node <nodeName> | grep -i taint

# taint node print
Taints: nodepool=fault:NoSchedule

# normal node print
Taints: <none>

All

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# delete all resource
kubectl delete all --all -n <namespace>

pod

basic

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# list namespace's pod
kubectl get pod -n {namespace}

# describe
kubectl describe pod {podName}

log

-c : Specify which container to retrieve logs from.

-f: Stream the logs in real-time.

–previous: Show logs from the last terminated container.

–since=: Return logs for the last period (e.g., 1h, 30m).

–tail=: Limit the number of log lines returned.

–all-containers=true: Get logs from all containers in the pod.

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# pod
kubectl logs -f {podId} -n {namespace}

# pod's container
kubectl logs <pod-name> -c <container-name> -n <namespace>

config

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kubectl get pod <容器id> --kubeconfig=/path/to/configfile -o yaml > env-vq48.yaml
# kubectl get -o yaml 这样的参数，会将指定的 Pod API 对象以 YAML 的方式展示出来。
# expose
kubectl get pod <pod-name> -n <namespace> -o yaml > pod-config.yaml

exec

without kubeconfig

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# kubectl exec -it {pod_name} -- /bin/bash
kubectl exec -it {pod_id} -n {namespace} -c {container_id} -- sh

copy

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kubectl cp 命令空间/容器id:/path/to/source_file ./path/to/local_file

delete

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# method 1
kubectl delete pod {pod_name} --grace-period=0 --force -n {namespace}

# method 2
kubectl patch pod <pod-name> -n <target-namespace> -p '{"metadata":{"finalizers":null}}' --type=merge

# method 3
step1 : kubectl edit pod <pod-name> -n <namespace>
step2 : delete the finalizers array under metadata, save the file, and exit
Aspect kubectl patch kubectl edit
Interaction Non-interactive (scriptable). Interactive (manual editing).
Precision Targets only the finalizers field. Requires manually deleting finalizers.
Use Case Automation (e.g., CI/CD pipelines). Debugging or ad-hoc fixes.
Safety Risk of typos in JSON syntax. Risk of accidental edits to other fields.

daemonsets

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kubectl get daemonsets --all-namespaces

# restart 
kubectl rollout restart daemonset/dingofs-csi-node -n dingofs

storage

CSIDriver

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kubectl get csidrivers

storageclass

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kubectl get storageclass

# delete 
kubectl delete storageclass <sc-name>

pvc

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kubectl get pvc

pv

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# list pv
kubectl get pv

# delete pv
## step1: change stragety
kubectl patch pv PV_NAME -p '{"spec":{"persistentVolumeReclaimPolicy":"Delete"}}'
## step2: delete
kubectl delete pv PV_NAME

# delete multiply pv
kubectl get pv --no-headers | grep <NAME> | awk '{print $1}' | xargs kubectl delete pv