clearml-server/server/elastic/mappings/events_log.json

{
  "template": "events-log-*",
  "order" : 1,
  "mappings": {
    "_default_": {
      "properties": {
        "msg":    { "type":"text", "index": false },
        "level":  { "type":"keyword" }
      }
    }
  }
}