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Add a couple of questions and exercises

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abregman
2021-09-01 01:02:32 +03:00
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exercises/kubernetes/killing_containers.md Normal file
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## "Killing" Containers
1. Run Pod with a web service (e.g. httpd)
2. Verify the web service is running with the `ps` command
3. Check how many restarts the pod has performed
4. Kill the web service process
5. Check how many restarts the pod has performed
6. Verify again the web service is running
## After you complete the exercise
* Why did the "RESTARTS" count raised?

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exercises/kubernetes/solutions/killing_containers.md Normal file
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## "Killing" Containers - Solution
1. Run Pod with a web service (e.g. httpd) - `kubectl run web --image registry.redhat.io/rhscl/httpd-24-rhel7`
2. Verify the web service is running with the `ps` command - `kubectl exec web -- ps`
3. Check how many restarts the pod has performed - `kubectl get po web`
4. Kill the web service process -`kubectl exec web -- kill 1`
5. Check how many restarts the pod has performed - `kubectl get po web`
6. Verify again the web service is running - `kubectl exec web -- ps`
## After you complete the exercise
* Why did the "RESTARTS" count raised? - `because we killed the process and Kubernetes identified the container isn't running proprely so it performed restart to the Pod`