DevOps/Kubernetes/kubectl
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(Redirected from Kubectl)Kubectl is a command line interface for running commands against Kubernetes clusters.[1]
To install in MacOS execute: brew install kubernetes-cli
kubectl info commands
[edit | edit source]- Verify running Pods:
kubectl get pods
kubectl get pod PODNAME
kubectl get pod PODNAME -n MY_NAMESPACE
kubectl get pod PODNAME -n MY_NAMESPACE --watch
- Fetch metrics for PODNAME pod
kubectl top pod PODNAME
kubectl operation commands
[edit | edit source]- Connect to a Pod:
kubectl exec -it YOUR_POD_NANE -- /bin/bash
kubectl delete/destroy commands
[edit | edit source]kubectl delete namespace MY_NAMESPACE
kubectl Command Reference
[edit | edit source]The following table includes short descriptions and the general syntax for all of the kubectl
operations:[2]
- Apply
kubectl apply -f FILENAME [flags]
. Apply a configuration change to a resource from a file or stdin. Allows to create a Pod.
- Attach
kubectl attach POD -c CONTAINER [-i] [-t] [flags]
:Attach to a running container either to view the output stream or interact with the container (stdin)
- Auto Scale
kubectl autoscale (-f FILENAME \| TYPE NAME \| TYPE/NAME) [--min=MINPODS] --max=MAXPODS [--cpu-percent=CPU] [flags]
: Automatically scale the set of pods that are managed by a replication controller
- Cluster Info
kubectl cluster-info [flags]
:Display endpoint information about the master and services in the cluster
- Create
kubectl create -f FILENAME [flags]
: Create one or more resources from a file or stdinkubectl create namespace myexamplenamespace
kubectl create sa my_new_user
(Create service account for your my_new_user)kubectl create -f mypod.yaml
- Config:
kubectl config .../...
kubectl config view
- Delete
kubectl delete (-f FILENAME \| TYPE [NAME \| /NAME \| -l label \| --all]) [flags]
:Delete resourceskubectl delete --all namespaces
- Describe
kubectl describe (-f FILENAME \| TYPE [NAME_PREFIX \| /NAME \| -l label]) [flags]
: Detailed state of one or more resources.kubectl describe pod MyPodName
kubectl describe pods
kubectl describe replicaset MyReplicaName
- Edit
kubectl edit (-f FILENAME \| TYPE NAME \| TYPE/NAME) [flags]
: Edit and update the definition of one or more resources on the server by using the default editor.
- Execute
kubectl exec POD [-c CONTAINER] [-i] [-t] [flags] [-- COMMAND [args...]]
: Execute a command against a container in a pod
- Logs
kubectl logs POD [-c CONTAINER] [--follow] [flags]
: Print the logs for a container in a pod.kubectl logs -l app=elasticsearch
(using labels: -l)
- Get:
kubectl get apiservices
kubectl get nodes
kubectl get pods
kubectl get pod PODNAME -n NAMESPACE -o yaml | kubectl replace --force -f -
[3]
- Replace:
kubectl replace --force -f yml_file_describing_pod.yml
- Proxy:
kubectl proxy --port=8080
[4]
- Rolling-update:
kubectl rolling-update
- Run
kubectl run NAME --image=image [--env="key=value"] [--port=port] [--replicas=replicas] [--dry-run=bool] [--overrides=inline-json] [flags]
: Run a specified image on the cluster.
- Scale:
kubectl scale deployment YOUR_DEPLOYMENT_NAME
- Stop
kubectl stop
- Version
kubectl version [--client] [flags]
: Display the Kubernetes version running on the client and server.
See also
[edit | edit source]- EKS
- kubeadm tools for creating Kubernetes cluster.
- Certified Kubernetes Administrator