🔐Kubernetes Secrets Are Not Encrypted Labs

🎯 Objective

Show that Kubernetes Secrets are only base64-encoded by default and not securely encrypted at rest without additional configuration.

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🧰 Prerequisites

• Kubernetes cluster

• kubectl configured

• Admin access to the cluster

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🔹 Lab 1: Create a Simple Kubernetes Secret

kubectl create secret generic demo-secret   --from-literal=username=admin   --from-literal=password='SuperSecret123'

✅ A secret named demo-secret is created.

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🔹 Lab 2: View the Secret Using kubectl

kubectl get secret demo-secret -o yaml

✅ Output:

apiVersion: v1
data:
  password: U3VwZXJTZWNyZXQxMjM=
  username: YWRtaW4=
kind: Secret
metadata:
  name: demo-secret
type: Opaque

🔍 The password and username fields are base64 encoded, not encrypted.

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🔹 Lab 3: Decode the Secret Locally

Decode the username:

echo "YWRtaW4=" | base64 --decode

Decode the password:

echo "U3VwZXJTZWNyZXQxMjM=" | base64 --decode

✅ You retrieve the original credentials easily with base64.

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🔹 Lab 4: Check How Secrets Are Stored in etcd

⚠️ Warning: Direct access to etcd is needed for real inspection; we simulate this.

Simulate reading etcd storage

If you had direct etcd access (example from /var/lib/etcd), you'd see that the stored secrets are still base64-encoded.

This proves that without encryption at rest enabled, secrets are only encoded — not securely encrypted.

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🔹 Lab 5: How to Enable Secret Encryption (for Real Protection)

Edit the Kubernetes API server manifest (usually /etc/kubernetes/manifests/kube-apiserver.yaml) to include:

--encryption-provider-config=/etc/kubernetes/encryption-config.yaml

Sample encryption-config.yaml:

apiVersion: apiserver.config.k8s.io/v1
kind: EncryptionConfiguration
resources:
- resources:
  - secrets
  providers:
  - aescbc:
      keys:
      - name: key1
        secret: <base64-encoded-aes-key>
  - identity: {}

✅ This encrypts Secrets at rest using AES encryption.

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🔹 Lab 6: Clean Up

kubectl delete secret demo-secret

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✅ Wrap-Up

• ✅ Created and inspected a Kubernetes Secret

• ✅ Verified Secrets are only base64-encoded by default

• ✅ Learned how to enable true encryption for Secrets at rest

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