Index lifecycle actions

Allocate
Move shards to nodes with different performance characteristics and reduce the number of replicas.
Delete
Permanently remove the index.
Force merge
Reduce the number of index segments and purge deleted documents. Makes the index read-only.
Freeze
Freeze the index to minimize its memory footprint.
Read only
Block write operations to the index.
Rollover
Remove the index as the write index for the rollover alias and start indexing to a new index.
Set Priority
Lower the priority of an index as it moves through the lifecycle to ensure that hot indices are recovered first.
Shrink
Reduce the number of primary shards by shrinking the index into a new index.
Unfollow
Convert a follower index to a regular index. Performed automatically before a rollover, shrink, or searchable snapshot action.
Wait for snapshot
Ensure that a snapshot exists before deleting the index.