An Elasticsearch index is a named collection of documents searched and queried as a unit. In centralized logging, each entry becomes a structured document with searchable fields, while different entries can use different fields because no fixed database schema is required. section 19.3
Daily container-log indexes
Fluentd saves each collected log entry as a document in an index named fluentd-{date}. In Kibana, create a data view named logs with the pattern fluentd* and use @timestamp as the timestamp field; Discover then searches and filters the collected documents. section 19.3
