Kubernetes

This repo contains sample files and commands for managing a kubernetes cluster.

Listing Resources

This command can be used for listing resources in kubernetes

kubectl get pods/replicasets/deployments/services

For listing all resources

kubectl get all

This command can be used for detailed listing of resources in kubernetes

kubectl get pods/replicasets/deployments/services -o wide

Describe a resource

This command can be used for describing a resource in kubernetes

kubectl describe pod/replicaset/deployment RESOURCE_NAME

Creating a resource

This command can be used for creating a resource in kubernetes

kubectl create -f resource.yaml

Updating a resource

This command can be used for updating a resource in kubernetes

kubectl replace -f resource.yaml

Alternatively you could also use this command for update

kubectl apply -f resource.yaml

Deleting a resource

This command can be used for deleting a resource in kubernetes

kubectl delete pod/replicaset/deployment RESOURCE_NAME

Editing a resource

This command can be used for editing a resource in kubernetes

kubectl edit pod/replicaset/deployment RESOURCE_NAME

This command will extract the pod defination to a file and we can edit it and re create the pods.

kubectl get pod <pod-name> -o yaml > pod-definition.yaml

Watching rollout status of deployment

This command can be used for watching rollout status of deployments.

kubectl rollout status deployment/DEPLOYMENT_NAME

Rollout History of deployment

This command can be used for listing rollout history of the deployment.

kubectl rollout history deployment/DEPLOYMENT_NAME

Undo Last Rollout of deployment

This command can be used to undo last rollout of the deployment.

kubectl rollout undo deployment/DEPLOYMENT_NAME

Scale a deployment

This command can be used to scale a deployment.

kubectl scale deployment DEPLOYMENT_NAME --replicas=NUMBER_OF_REPLICAS