app-job-2-proxy.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: job-sa
  namespace: default
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: job-pod-status
rules:
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["get"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: job-pod-status
subjects:
  - kind: ServiceAccount
    name: job-sa
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: job-pod-status
---
apiVersion: batch/v1
kind: Job
metadata:
  name: app2-job
  namespace: default
spec:
  backoffLimit: 1
  template:
    metadata:
      annotations:
        sidecar.vault.talend.org/inject: "true"
        sidecar.vault.talend.org/mode: "proxy,job"  # Enable only 'proxy' and 'job' modes
        # Vault Sidecar Injector receive the pod spec: don't know whether it is a job or a deployment. 
        # Annotation below is deprecated, use 'sidecar.vault.talend.org/mode' instead.
        #sidecar.vault.talend.org/workload: "job"
      labels:
        com.talend.application: test
    spec:
      restartPolicy: Never
      # custom serviceAccountName with role allowing to perform GET on pods (needed to poll for job's pod status)
      serviceAccountName: job-sa
      containers:
        - name: app2-job-container
          image: everpeace/curl-jq
          command:
            - "sh"
            - "-c"
            - |
              set -e
              echo "Job started"
              echo "Now using Vault Agent as a proxy to leverage Encryption as a Service feature"
              echo "Advantage: you do not need to deal with any Vault tokens and you just have to send requests to the local Vault Agent sidecar (available at 127.0.0.1) that will then forward everything to Vault server."
              echo

              isVaultReady=$(curl -s -X GET http://127.0.0.1:8200/v1/sys/health | jq --raw-output .initialized)
              while [ "$isVaultReady" != "true" ];do
                sleep 5
                isVaultReady=$(curl -s -X GET http://127.0.0.1:8200/v1/sys/health | jq --raw-output .initialized)
              done

              plaintext="Secret data to protect"
              echo "Data that is going to be ciphered and deciphered: $plaintext"
              echo
              b64Plaintext=$(echo "$plaintext" | base64)
              
              ciphertext=$(curl -s -X POST --data "{\"plaintext\": \"$b64Plaintext\"}" http://127.0.0.1:8200/v1/transit/encrypt/test-key | jq --raw-output .data.ciphertext)
              echo "Ciphertext"
              echo "=========="
              echo "$ciphertext"
              echo
              
              cleartext=$(curl -s -X POST --data "{\"ciphertext\": \"$ciphertext\"}" http://127.0.0.1:8200/v1/transit/decrypt/test-key | jq --raw-output .data.plaintext)
              echo "Cleartext"
              echo "=========="
              echo "$cleartext" | base64 -d
              echo
              echo "Job stopped"