To test the ES healthcheck with kubectl proxy:
    curl "http://localhost:8001/api/v1/namespaces/default/services/docmag-elasticsearch:http/proxy/_cluster/health"

A backup could be manually executed with kubectl using:
    curl -X PUT "http://localhost:8001/api/v1/namespaces/default/services/docmag-elasticsearch:http/proxy/_snapshot/docidx_backup_0/snapshot_20180411?wait_for_completion=true" -H "Content-Type: application/json"

And a manual restore can be performed with:
    curl -X POST "http://localhost:8001/api/v1/namespaces/default/services/docmag-elasticsearch:http/proxy/_snapshot/docidx_backup_0/snapshot_20180411/_restore" -H "Content-Type: application/json"
