The docs for a basic roll-over seem to be lacking a bit around how the index write alias is managed. Does it have to exist on the index or will ISM add it? When an index “Rolls over” for various conditions, does the new index automatically get the alias and the previous index has the alias removed…

Rollover alias question

jasonrojas June 3, 2020, 5:42am 6

One more thing to add:
the index template does not automatically set the index alias:

Topic		Replies	Views
Rollover alias not pointing to the rolled over index Index Management	1	1073	August 24, 2020
Why am I getting "Missing alias or not the write index when rollover"? OpenSearch index-management	6	65	September 26, 2025
ISM rollover and alias Index Management	1	1089	August 16, 2021
Help, Missing alias or not the write index when rollover Community	10	1876	July 28, 2023
Stuck at "Attempting to rollover" Index Management	11	2910	June 29, 2020