63 lines
1.2 KiB
Markdown
63 lines
1.2 KiB
Markdown
## ReplicaSet 02 - Solution
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1. Create a ReplicaSet with 2 replicas. The app can be anything.
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```
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cat >> rs.yaml <<EOL
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apiVersion: apps/v1
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kind: ReplicaSet
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metadata:
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name: web
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labels:
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app: somewebapp
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type: web
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spec:
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replicas: 2
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selector:
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matchLabels:
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type: web
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template:
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metadata:
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labels:
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type: web
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spec:
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containers:
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- name: httpd
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image: registry.redhat.io/rhscl/httpd-24-rhel7
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EOL
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kubectl apply -f rs.yaml
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```
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2. Verify a ReplicaSet was created and there are 2 replicas
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```
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kubectl get rs
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# OR a more specific way: kubectl get -f rs.yaml
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```
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3. Remove the ReplicaSet but NOT the pods it created
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```
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kubectl delete -f rs.yaml --cascade=orphan
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```
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4. Verify you've deleted the ReplicaSet but the Pods are still running
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```
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kubectl get rs # no replicas
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kubectl get po # Pods still running
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```
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5. Create again the same ReplicaSet, without changing anything
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```
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kubectl apply -f rs.yaml
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```
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6. Verify that the ReplicaSet used the existing Pods and didn't create new Pods
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```
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kubectl describe rs web # You should see there are no new events and if you list the pods with 'kubectl get po -f rs.yaml` you'll see they have the same names
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```
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