task-018-replicaset

• How many replicasets exist

$ kubectl get replicaset        
No resources found in default namespace.

• Which image has been used to create pods using the replica set

$ kubectl describe replicaset replicaset-1 | grep Image
    Image:        nginx

• How many pods are in ready state

$ kubectl get pods                                     
NAME                 READY   STATUS    RESTARTS   AGE
replicaset-1-66pmk   1/1     Running   0          60s
replicaset-1-tmlkq   1/1     Running   0          60s

• Create a replicaset using nginx image

kubectl apply -f replicaset.yaml

NOTE: The selector:matchLabels:A:B and template:metadata:labels:A:B must always match. It makes sense as the replica set is aimed at maintaining pods which have lables mentioned (for example) A:B

• Can you edit the existing the replicaset to have more pods

$ kubectl edit replicaset replicaset-1                                       
replicaset.apps/replicaset-1 edited

OR

$ kubectl scale replicaset --replicas=5 replicaset-1 
replicaset.apps/replicaset-1 scaled