kodekloud-engineer/kubernetes/mock exams/exam-1.md

# Task 1

```bash
apiVersion: v1
kind: Pod
metadata:
  labels:
    run: mc-pod
  name: mc-pod
  namespace: mc-namespace
spec:
  containers:
  - image: nginx:1-alpine
    name: mc-pod-1
    env:
    - name: NODE_NAME
      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName    
  - image: busybox:1
    name: mc-pod-2
    command: ["sh", "-c"]
    args: ["while true; do date >> /var/log/shared/date.log; sleep 1; done"]
    volumeMounts:
    - mountPath: /var/log/shared
      name: shared-log
  - image: busybox:1
    name: mc-pod-3
    command: ["sh", "-c"]
    args: ["tail -f /var/log/shared/date.log"]
    volumeMounts:
    - mountPath: /var/log/shared
      name: shared-log
  volumes:
  - name: shared-log
    emptyDir:
      sizeLimit: 500Mi


echo "verticalpodautoscalercheckpoints" >> /root/vpa-crds.txt
echo "verticalpodautoscalers" >> /root/vpa-crds.txt


kubectl expose pod messaging --port=6379 --name=messaging-service

kubectl create deployment hr-web-app --image=kodekloud/webapp-color --replicas=2

cat webapp-hpa.yaml 
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: webapp-hpa
  namespace: default
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: kkapp-deploy
  minReplicas: 2
  maxReplicas: 10



cat pv.yaml 
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-analytics
spec:
  hostPath:
    path: /pv/data-analytics
  accessModes:
    - ReadWriteMany
  capacity: 
    storage: 100Mi

cat orange.yaml 
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: "2026-07-21T19:20:48Z"
  generation: 1
  name: orange
  namespace: default
  resourceVersion: "4629"
  uid: 3a8c1925-7db8-4518-9489-e6ae2e814ac5
spec:
  containers:
  - command:
    - sh
    - -c
    - echo The app is running! && sleep 3600
    image: busybox:1.28
    imagePullPolicy: IfNotPresent
    name: orange-container
    resources: {}
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: kube-api-access-jhc2d
      readOnly: true
  dnsPolicy: ClusterFirst
  enableServiceLinks: true
  initContainers:
  - command:
    - sh
    - -c
    - sleep 2;
    image: busybox
    imagePullPolicy: Always
    name: init-myservice
    resources: {}
    terminationMessagePath: /dev/termination-log
    terminationMessagePolicy: File
    volumeMounts:
    - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
      name: kube-api-access-jhc2d
      readOnly: true
  nodeName: controlplane
  preemptionPolicy: PreemptLowerPriority
  priority: 0
  restartPolicy: Always
  schedulerName: default-scheduler
  securityContext: {}
  serviceAccount: default
  serviceAccountName: default
  terminationGracePeriodSeconds: 30
  tolerations:
  - effect: NoExecute
    key: node.kubernetes.io/not-ready
    operator: Exists
    tolerationSeconds: 300
  - effect: NoExecute
    key: node.kubernetes.io/unreachable
    operator: Exists
    tolerationSeconds: 300
  volumes:
  - name: kube-api-access-jhc2d
    projected:
      defaultMode: 420
      sources:
      - serviceAccountToken:
          expirationSeconds: 3607
          path: token
      - configMap:
          items:
          - key: ca.crt
            path: ca.crt
          name: kube-root-ca.crt
      - downwardAPI:
          items:
          - fieldRef:
              apiVersion: v1
              fieldPath: metadata.namespace
            path: namespace     

kubectl expose deployment hr-web-app --port=8080 --type=NodePort --name=hr-web-app-service                 

-----------

cat /root/webapp-hpa.yaml
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: webapp-hpa
spec:
  maxReplicas: 10
  metrics:
  - resource:
      name: cpu
      target:
        averageUtilization: 50
        type: Utilization
    type: Resource
  minReplicas: 1
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: kkapp-deploy
status:
  currentMetrics: null
  desiredReplicas: 0

----------------------------

# vpa
# ----------------

apiVersion: autoscaling.k8s.io/v1
kind: VerticalPodAutoscaler
metadata:
  name: analytics-vpa
  namespace: default
spec:
  targetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: analytics-deployment
  updatePolicy:
    updateMode: "Recreate"
  resourcePolicy:
    containerPolicies:
    - containerName: "*"
      controlledResources: ["cpu", "memory"]

# -----------------
# gateway
# -------

apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: web-gateway
  namespace: nginx-gateway
spec:
  gatewayClassName: nginx
  listeners:
  - name: http
    protocol: HTTP
    port: 80
    allowedRoutes:
      namespaces:
        from: Same

# --------
helm upgrade -n kk-ns kk-mock1 kk-mock1/podinfo --version 6.11.2

# --------

```