You must connect to the correct host.

Task Summary

SSH into cka000054

Install a CNI plugin that supports NetworkPolicies

Two CNI options provided:

Flannel v0.26.1 (❌ does NOT support NetworkPolicies)

Calico v3.28.2 ✅ (does support NetworkPolicies)

❗ Decision Point: Which CNI to choose?

✅ Choose Calico, because only Calico supports enforcing NetworkPolicies natively. Flannel does not.

✅ Step-by-Step Solution

1️⃣ SSH into the correct node

ssh cka000054

⚠️ Required. Skipping this results in zero score.

2️⃣ Install Calico CNI (v3.28.2)

Use the official manifest provided:

kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.28.2/manifests/tigera-operator.yaml

This installs the Calico Operator, which then deploys the full Calico CNI stack.

3️⃣ Wait for Calico components to come up

Check the pods in tigera-operator and calico-system namespaces:

kubectl get pods -n tigera-operator

kubectl get pods -n calico-system

✅ You should see pods like:

calico-kube-controllers

calico-node

calico-typha

tigera-operator

Wait for all to be in Running state.

✅ (Optional) 4️⃣ Confirm CNI is enforcing NetworkPolicies

You can check:

kubectl get crds | grep networkpolicy

You should see:

networkpolicies.crd.projectcalico.org

This confirms Calico's CRDs are installed for policy enforcement.

Final Command Summary

ssh cka000054

kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.28.2/manifests/tigera-operator.yaml

kubectl get pods -n tigera-operator

kubectl get pods -n calico-system

kubectl get crds | grep networkpolicy