Kubernetes cheat sheet

Kubernetes Cluster commands

Cluster Information

kubectl cluster-info

API Versions supported in Kubernetes

kubectl api-versions

API Resources available in Kubernetes

kubectl api-resources

Kubernetes get Object Info

List all kubernetes objects in the namespace

kubectl get all -n <namespace>

List all pods

kubectl get pods -n <namespace>

List Network policy

    I:\k8s-deploy>kubectl get netpol -n <namespace>

    NAME                                 POD-SELECTOR     AGE
    allow-ingress-to-helloworld-policy   app=helloworld   22h

Output Formats

Kubernetes supports multiple output format such as : yaml, json, wide, name, . You can use -o flag

kubernetes Deployment Commands

Apply yml definition to kubernetes

kubectl apply -f <file_name.yml> -f <namespace>

Running a Docker image in Interactive mode in kubernetes cluster

kubectl run --generator=run-pod/v1 --image hr4g67xo8d45/product-service -it product-service  -- /bin/bash

Delete any kubernetes object

kubectl delete -n <namespace> <object_type>/<object_name> ...

for example :

    kubectl delete -n <namespace> pod/nginx-wdswe2-343dcd service/nginx

Delete all kubernetes objects defined in an yaml file

    kubectl delete -f <file_name.yml> -f <namespace>