Subject really says it all.
version 7.14
The cluster is new and has just one node for testing and this is the first datastream I have tried to create.
One thing that is puzzling me is what does it mean by "composable template"?
I create the template in kibana from that index-templates page.
There is this message in the ES server log:
[2021-12-07T07:21:21,066][INFO ][o.e.c.m.MetadataIndexTemplateService] [secmonprd08] adding index template [simulate_template_6vmtsg5kq_eziqoggn7r-a] for index patterns [45a298b8-5fa9-479c-a4a0-340b1410d769]
the template now has no index setting, component templates or aliases. Just mapping. I have created mapping both by hand and by json.
The only thing I turned up when searching the message was a discussion on github amongst ES developers about how unsatisfactory the message was!