Encrypter

This application is used to compare two secret engines, Transit and Transform, in HashiCorp Vault.

Build and Push the Docker Image

Use the following steps to build the docker image and push it to Docker Hub.

# Build the Docker image
~]$ sudo docker build --tag encrypter .
...
Successfully tagged encrypter:latest

# Tag the Docker image with the latest tag
~]$ sudo docker tag encrypter jacobmammoliti/encrypter

# Push the Docker image to Docker Hub
~]$ sudo docker push jacobmammoliti/encrypter:latest
...
latest: digest: sha256:xxx

Build and Deploy Kubernetes Manifest

Use the following steps to deploy the application into Kubernetes.

# Create a separate namespace
~]$ kubectl create ns encrypter

# Create PVC to persist encrypted data.
~]$ kubectl -n encrypter apply -f <<EOF
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: encrypter-pv-claim
  labels:
    app: encrypter
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
EOF

# Create Kubernetes secret for Vault Approle SECRET_ID
~]$ kubectl -n encrypter create secret generic vault-secret-id --from-literal=id=XXX

# Create deployment. Be sure to update the VAULT_ADDR and ROLE_ID.
~]$ kubectl -n encrypter apply -f <<EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: encrypter-deployment
  labels:
    app: encrypter
spec:
  selector:
    matchLabels:
      app: encrypter
  template:
    metadata:
      labels:
        app: encrypter
    spec:
      containers:
      - name: encrypter
        image: jacobmammoliti/encrypter:latest
        ports:
        - containerPort: 8080
        env:
        - name: VAULT_ADDR
          value: ""
        - name: ROLE_ID
          value: ""
        - name: SECRET_ID
          valueFrom:
            secretKeyRef:
              name: vault-secret-id
              key: id
        volumeMounts:
        - name: data
          mountPath: /mnt/data
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: encrypter-pv-claim
EOF

# Create a LoadBalancer type service to expose the deployment.
# Use ClusterIP if planning to use an Ingress Controller.
~]$ kubectl -n encrypter apply -f <<EOF
apiVersion: v1
kind: Service
metadata:
  name: encrypter-service
spec:
  selector:
    app: encrypter
  ports:
    - port: 8080
      targetPort: 8080
  type: LoadBalancer
EOF

~]$ kubectl -n encrypter get all
NAME                                        READY   STATUS    RESTARTS   AGE
pod/encrypter-deployment-6fd9bbfbcd-f8tkz   1/1     Running   0          10m

NAME                        TYPE           CLUSTER-IP       EXTERNAL-IP      PORT(S)          AGE
service/encrypter-service   LoadBalancer   10.109.211.155   10.100.100.220   8080:30917/TCP   10m

NAME                                   READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/encrypter-deployment   1/1     1            1           10m

NAME                                              DESIRED   CURRENT   READY   AGE
replicaset.apps/encrypter-deployment-6fd9bbfbcd   1         1         1       10m