How to delete replication controller and its pods in kubernetes?
What is the command to delete replication controller and its pods?
I am taking a course to learn k8s on pluralsight. I am trying to delete the pods that I have just created using Replication controller. Following is my YAML:
apiVersion: v1
kind: ReplicationController
metadata:
name: hello-rc
spec:
replicas: 2
selector:
app: hello-world
template:
metadata:
labels:
app: hello-world
spec:
containers:
- name: hello-ctr
image: nigelpoulton/pluralsight-docker-ci:latest
ports:
- containerPort: 8080If I do 'kubectl get pods' following is the how it looks on my mac:
I have tried the following two commands to delete the pods that are created in the Minikube cluster on my mac, but they are not working:
kubectl delete pods hello-world kubectl delete pods hello-rc
Could someone help me understand what I am missing?
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2 Answers
you can delete the pods by deleting the replication controller that created them
kubectl delete rc hello-rcalso, because pods created are just managed by ReplicationController, you can delete only theReplicationController and leave the pods running
kubectl delete rc hello-rc --cascade=falsethis means the pods are no longer managed .you can create a new ReplicationController with the proper label selector and manage them again
Also,instead of replicationcontrollers, you can use replica sets. They behave in a similar way, but they have more expressive pod selectors. For example, a ReplicationController can’t match pods with 2 labels
below command is just enough
kubectl delete rc hello-rcOne more thing is that ReplicationController is deprecated rather ReplicaSets is preferred