Practice Test - ReplicaSets

Run the command kubectl get pods and count the number of pods.
Details
```
$ kubectl get pods
```
Run the command kubectl get replicaset and count the number of replicasets.
Details
```
$ kubectl get rs
```
Run the command kubectl get replicaset
Details
```
$ kubectl get rs
```
Run the command kubectl get replicaset and look at the count under the Desired column
Details
```
$ kubectl get rs
```
Run the command kubectl describe replicaset and look under the containers section.
Details
```
$ kubectl describe replicaset (or)
$ kubectl get rs -o wide
```
Run the command kubectl get replicaset and look at the count under the Ready column
Details
```
$ kubectl get repplicaset
```
Run the command kubectl describe pods and look under the events section.
Details
```
$ kubectl describe pods
```
Run the command kubectl delete pod <podname>
Details
```
$ kubectl delete pod new-replica-set-XXXX
```
Run the command kubectl get pods and count the number of PODs
Details
```
$ kubectl get pods
```
ReplicaSets ensures that desired number of PODs always run
The value for apiVersion is incorrect. Find the correct apiVersion for ReplicaSet.

Get the apiVersion for replicaset
Details
```
$ kubectl explain replicaset|grep VERSION
```
Update the replicaset defination file with correct version and create a replicaset
Details
```
$ kubectl create -f replicaset-defination-1.yaml
```

The values for labels on lines 9 and 13 should match.

Details

Selector matchLabels should match with POD labels - Update the replicaset-defination-2.yaml
$ kubectl create -f replicaset-defination-2.yaml

Run the command kubectl delete replicaset

Details

$ kubectl delete replicaset replicaset-1
$ kubectl delete rs replicaset-2

Run the command kubectl edit replicaset new-replica-set, modify the image name to busybox and then save the file.
Details
```
$ kubectl edit replicaset new-replica-set
```
Run the command kubectl edit replicaset new-replica-set, modify the replicas and then save the file.
Details
```
$ kubectl edit replicaset new-replica-set
```
Another way
Details
```
$ kubectl scale --replicas=5 replicaset new-replica-set
```
Run the command kubectl edit replicaset new-replica-set, modify the replicas and then save the file.
Details
```
$ kubectl edit replicaset new-replica-set
```
Another way
Details
```
$ kubectl scale --replicas=2 replicaset new-replica-set
```

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