Completed upto lesson 28

lab/lesson-8-solution.yaml

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+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny-all
+  namespace: cks-net-hard
+spec:
+  podSelector: {}
+  policyTypes:
+    - Ingress
+    - Egress
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: allow-ledger-ingress-from-checkout
+  namespace: cks-net-hard
+spec:
+  podSelector:
+    matchLabels:
+      app: ledger
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - podSelector:
+            matchLabels:
+              app: checkout
+      ports:
+        - protocol: TCP
+          port: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: allow-checkout-egress
+  namespace: cks-net-hard
+spec:
+  podSelector:
+    matchLabels:
+      app: checkout
+  policyTypes:
+    - Egress
+  egress:
+    - to:
+        - podSelector:
+            matchLabels:
+              app: ledger
+      ports:
+        - protocol: TCP
+          port: 8080
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+          podSelector:
+            matchLabels:
+              k8s-app: kube-dns
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53