Imperative commands

The recommanded way to create resources in Kubernetes is by using YAML file. YAML provides a declarative approach, making it easier to manage the configuration. However, if you’re working on a local cluster and need a quicker solution, you can use kubectl imperative commands like kubectl create.

Examples of Imperative Commands

• creating a Deployment with 5 Pod replicas

kubectl create deploy my-dep --image=nginx:1.24 --replicas=5

• creating a Job

kubectl create job my-job --image=busybox -- echo "Hello, Kubernetes!"

• creating a Pod and exposing it with a ClusterIP Service at the same time

kubectl run ghost --image=ghost:4 --port=2368 --expose

Feel free to explore and use these commands, you can get the list with kubectl create --help, to get a clearer view of all the available options.

Also, from these imperative commands you can easily retrieve the YAML specification of a resource using the options --dry-run=client -o yaml. The example below allows creates a Pod specification in pod.yaml

kubectl run nginx --image=nginx:1.20 --dry-run=client -o yaml > pod.yaml