added k11 labs

Author: imShakil

kubernetes/11.md

@@ -0,0 +1,107 @@
+# Update Deployment and Service in Kubernetes
+
+An application deployed on the Kubernetes cluster requires an update with new features developed by the Nautilus application development team. The existing setup includes a deployment named nginx-deployment and a service named nginx-service. Below are the necessary changes to be implemented without deleting the deployment and service:
+
+- 1.) Modify the service nodeport from `30008` to `32165`
+- 2.) Change the replicas count from `1` to `5`
+- 3.) Update the image from `nginx:1.17` to `nginx:latest`
+
+> Note: The kubectl utility on jump_host is configured to operate with the Kubernetes cluster.
+
+## Steps
+
+1. Lets extract deployments into yaml file:
+
+    ```sh
+    kubectl get deployments.apps nginx-deployment -o yaml > nginx-deployment.yml
+    ```
+
+2. Let's update replicas and container image:
+
+    ```sh
+    vi nginx-deployment.yml
+    ```
+
+    - `replicas`: 1 to 5
+    - `image`: nginx:1.17 to nginx:latest
+
+3. Update deployment
+
+    ```sh
+    kubectl apply -f nginx-deployment.yml
+    ```
+
+4. Let's extract service
+
+    ```sh
+    kubectl get svc
+    kubectl get svc nginx-service -o yaml > svc.yml
+    ```
+
+5. Let's change the nodeport
+
+    ```sh
+    vi svc.yml
+    ```
+
+    - change `nodeport`: 30008 to 32165
+
+    ```YAML
+    apiVersion: v1
+    kind: Service
+    metadata:
+    annotations:
+        kubectl.kubernetes.io/last-applied-configuration: |
+        {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"name":"nginx-service","namespace":"default"},"spec":{"ports":[{"nodePort":30008,"port":80,"targetPort":80}],"selector":{"app":"nginx-app"},"type":"NodePort"}}
+    creationTimestamp: "2025-09-16T15:47:20Z"
+    name: nginx-service
+    namespace: default
+    resourceVersion: "755"
+    uid: 11a1de9f-9881-4be2-afa3-7c9e64c5c33a
+    spec:
+    clusterIP: 10.96.194.172
+    clusterIPs:
+    - 10.96.194.172
+    externalTrafficPolicy: Cluster
+    internalTrafficPolicy: Cluster
+    ipFamilies:
+    - IPv4
+    ipFamilyPolicy: SingleStack
+    ports:
+    - nodePort: 32165
+        port: 80
+        protocol: TCP
+        targetPort: 80
+    selector:
+        app: nginx-app
+    sessionAffinity: None
+    type: NodePort
+    status:
+    loadBalancer: {}
+    ```
+
+6. Update service
+
+    ```sh
+    kubectl apply -f svc.yml
+    ```
+
+7. Verify
+
+    ```shell
+     kubectl get svc
+    NAME            TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
+    kubernetes      ClusterIP   10.96.0.1       <none>        443/TCP        21m
+    nginx-service   NodePort    10.96.194.172   <none>        80:32165/TCP   17m
+    ```
+
+    > replicas:
+
+    ```$ kubectl get pods
+    NAME                                READY   STATUS    RESTARTS   AGE
+    nginx-deployment-854ff588b7-fq8c4   1/1     Running   0          9m25s
+    nginx-deployment-854ff588b7-k6fhw   1/1     Running   0          9m26s
+    nginx-deployment-854ff588b7-mm7x4   1/1     Running   0          9m39s
+    nginx-deployment-854ff588b7-rscc2   1/1     Running   0          9m39s
+    nginx-deployment-854ff588b7-swrwm   1/1     Running   0          9m39s
+    ```