Added Solution for CKA Challenge Week 4

Study Group Submissions/CKA Challenge Week 4 Answer/MohanVaddella.md

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+**Name**: Mohan Vaddella
+
+**Email**: [email protected]
+
+---
+
+# Weekly Challenge: Daemonset Configuration in Kubernetes
+
+## Proposed Solution
+
+First, let’s create the pods `service-red` and `service-blue`:
+
+```yaml
+# service-red.yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: service-red
+spec:
+  containers:
+  - name: service-red
+    image: kodekloud/simple-webapp
+    ports:
+    - containerPort: 8080
+    env:
+    - name: APP_COLOR
+      value: "red"
+```
+
+```yaml
+# service-blue.yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: service-blue
+spec:
+  containers:
+  - name: service-blue
+    image: kodekloud/simple-webapp
+    ports:
+    - containerPort: 8080
+    env:
+    - name: APP_COLOR
+      value: "blue"
+```
+
+Apply these configurations with `kubectl apply -f service-red.yaml` and `kubectl apply -f service-blue.yaml`.
+
+Next, let’s create the ConfigMap `nginx-conf` with the provided Nginx configuration:
+
+```yaml
+kubectl create configmap nginx-conf --from-literal=default.conf='
+server {
+    listen 80;
+    server_name localhost;
+
+    location /service-red {
+        proxy_pass http://service-red;
+    }
+
+    location /service-blue {
+        proxy_pass http://service-blue;
+    }
+}'
+```
+
+Now, let’s define the DaemonSet `nginx-reverse-proxy-daemonset`:
+
+```yaml
+# nginx-reverse-proxy-daemonset.yaml
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: nginx-reverse-proxy-daemonset
+spec:
+  selector:
+    matchLabels:
+      name: nginx-reverse-proxy
+  template:
+    metadata:
+      labels:
+        name: nginx-reverse-proxy
+    spec:
+      containers:
+      - name: nginx-reverse-proxy
+        image: nginx
+        ports:
+        - containerPort: 80
+        volumeMounts:
+        - name: conf
+          mountPath: /etc/nginx/conf.d/default.conf
+      volumes:
+      - name: conf
+        configMap:
+          name: nginx-conf
+```
+
+Apply this configuration with `kubectl apply -f nginx-reverse-proxy-daemonset.yaml`.
+
+Finally, you can validate the setup by accessing the service. You can use `kubectl port-forward` or `kubectl proxy` to access the service from your local machine. For example:
+
+```yaml
+kubectl port-forward daemonset/nginx-reverse-proxy-daemonset 8080:80
+```
+
+Then, you can access the service at `http://localhost:8080/service-red` and `http://localhost:8080/service-blue`.
+
+
+