We just updated to Elasticsearch 6.7, and were looking forward to start using Index Lifecycle Policies instead of Curator.
I was very surprised to see that index lifecycles are "activated" by attaching them to index templates, instead of simple index pattern matching. This makes the functionality a lot less valuable and harder to use, imho.
Couple of reasons:
Index lifecycles will only apply to indexes created after the lifecycle was "activated" since templates are applied to indexes upon creation. This strikes me as a strange choice, as it requires the continued use of Curator (or whatever tool one's using) to manage old indexes, while new indexes are handled via policies.
We have a lot of "prod/nonprod" indexes which are created from the same template, since the schema is identical. However, we want to have completely different retainment policies. This is not possible using policies, again since they are mapped to index templates and not indexes.
I was super-surprised to find this weird limitation. Am I missing something?