Kubernetes commands

• kubectl get – list resources
• kubectl describe – show detailed information about a resource
• kubectl logs – print the logs from a container in a pod
• kubectl exec – execute a command on a container in a pod

List existing pods

kubectl get pods

Get detailed information on the pods

kubectl describe pods

Start a proxy to access the containers within the pod

kubectl proxy

Get the pod name and store it in the POD_NAME environment variable

export POD_NAME=$(kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}')
echo Name of the Pod: $POD_NAME

Access an API running in the pod. The name of the pod is in the POD_NAME environment variable

curl http://localhost:8001/api/v1/namespaces/default/pods/POD_NAME/proxy/

View the STDOUT of the only container of the pod

kubectl logs POD_NAME

View the STDOUT of a specific container of the pod

kubectl logs POD_NAME -c CONTAINER_NAME

View the STDOUT of all containers of the pod

kubectl logs POD_NAME --all-containers=true

Execute a command in the only container of the pod

kubectl exec POD_NAME MY_COMMAND

Execute a command in a container of the pod

kubectl exec POD_NAME -c CONTAINER_NAME MY_COMMAND

Start a Bash session in the container (container name is optional if the pod has only one container)

kubectl exec -ti POD_NAME -c CONTAINER_NAME bash

To check an API from the Bash console within the container (use localhost to address it within the container)

curl localhost:8080

Force the deletion of all pods of a deployment

Make sure the MY_DEPLOYMENT_NAME only returns the pods you really want to delete

# IMPORTANT!!!
# First make sure the query only returns the list of pods you really want to delete

kubectl get pods | grep MY_DEPLOYMENT_NAME | awk '{print $1}')

Execute the command to delete the pods

while IFS= read -r result
do
    kubectl delete pod $result --grace-period=0 --force
done < <(kubectl get pods | grep MY_DEPLOYMENT_NAME | awk '{print $1}')