Completed upto lesson 28

lab/lesson-8-answer.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: cks-net-hard
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: ledger
+  namespace: cks-net-hard
+spec:
+  selector:
+    app: ledger
+  ports:
+    - port: 8080
+      targetPort: 8080
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: ledger
+  namespace: cks-net-hard
+  labels:
+    app: ledger
+spec:
+  containers:
+    - name: ledger
+      image: busybox:1.37
+      command: ["sh", "-c", "mkdir -p /www; echo ledger > /www/index.html; httpd -f -p 8080 -h /www"]
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: checkout
+  namespace: cks-net-hard
+  labels:
+    app: checkout
+spec:
+  containers:
+    - name: checkout
+      image: busybox:1.37
+      command: ["sh", "-c", "sleep 3600"]
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: intruder
+  namespace: cks-net-hard
+  labels:
+    app: intruder
+spec:
+  containers:
+    - name: intruder
+      image: busybox:1.37
+      command: ["sh", "-c", "sleep 3600"]
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: cks-net-hard
+  namespace: cks-net-hard
+spec:
+  podSelector: {}
+  policyTypes:
+  - Ingress
+  - Egress
+  ingress:
+  - from:
+    - podSelector:
+        matchLabels:
+          app: checkout
+    ports:
+    - protocol: TCP
+      port: 8080
+  egress:
+  - to:
+    - podSelector:
+        matchLabels:
+          app: ledger
+    ports:
+    - protocol: TCP
+      port: 8080
+    
+  - to:
+    - podSelector:
+        matchLabels:
+          app: checkout
+    ports:
+    - port: 53
+      protocol: TCP
+    - port: 53
+      protocol: UDP
+