mapping - How to make elasticsearch add the timestamp field to every document in all indices?

Question

Elasticsearch experts,

I have been unable to find a simple way to just tell ElasticSearch to insert the _timestamp field for all the documents that are added in all the indices (and all document types).

I see an example for specific types: http://www.elasticsearch.org/guide/reference/mapping/timestamp-field/

and also see an example for all indices for a specific type (using _all): http://www.elasticsearch.org/guide/reference/api/admin-indices-put-mapping/

but I am unable to find any documentation on adding it by default for all documents that get added irrespective of the index and type.

Answer 1

Elasticsearch used to support automatically adding timestamps to documents being indexed, but deprecated this feature in 2.0.0

From the version 5.5 documentation:

The _timestamp and _ttl fields were deprecated and are now removed. As a replacement for _timestamp, you should populate a regular date field with the current timestamp on application side.