Unable to add keystore secure password through kubernetes init containers

Elastic Stack Elasticsearch
1
  1. Deploying elasticsearch as docker in kubernetes
  2. Trying to add keystore secure password as part of kubernetes init container while deploying the a statefulset but the password is not getting added.
      initContainers:
      - name: setup
        image: $REGISTRY_ADDRESS/elasticsearch:$DOCKER_TAG
        env:
        - name: XPACK_SECURITY_TRANSPORT_SSL_KEYSTORE_SECURE_PASSWORD
          valueFrom:
            secretKeyRef:
              name: $K8S_SERVICE_SECRETS
              key: xpack.security.transport.ssl.keystore.secure_password
        command:
        - sh
        - -c
        - |
          echo $XPACK_SECURITY_TRANSPORT_SSL_KEYSTORE_SECURE_PASSWORD | /usr/share/elasticsearch/bin/elasticsearch-keystore add --stdin --force xpack.security.transport.ssl.keystore.secure_password
        resources:
          requests:
            cpu: $POD_RESOURCE_REQUESTS_CPU
            memory: $POD_RESOURCE_REQUESTS_MEM
          limits:
            cpu: $POD_RESOURCE_LIMITS_CPU
            memory: $POD_RESOURCE_LIMITS_MEM
        securityContext:
          privileged: true
  1. Tried adding as docker args but it fails for below reason.
docker run es-local echo abc | /usr/local/share/elasticsearch/bin/elasticsearch-keystore add abc
-bash: /usr/local/share/elasticsearch/bin/elasticsearch-keystore: No such file or directory
write /dev/stdout: broken pipe
2

Hello,

I have some experience with Docker and the Elasticsearch keystore utilities, but unfortunately I have less experience with Kubernetes. I see you've posted a fragment of your configuration file. Do you think you could create a version of the configuration where I could run kubectl -f sample-conf.yaml and see the problem for myself?

-William