Commits on May 16, 2023

1. [Fleet] Rollover data streams when package w/ TSDB setting changed is… …

   … installed (elastic#157869)
   
   ## Summary
   
   Fixes elastic#157345
   
   When a package with a changed `index.mode` or `source.mode` setting is
   installed, Fleet will now automatically perform a rollover to ensure the
   correct setting is present on the resulting backing index.
   
   There is an issue with Elasticsearch wherein toggling these settings
   back and forth will incur a backing index range overlap error. See
   elastic/elasticsearch#96163.
   
   To test
   1. Install the `system` integration at version `1.28.0`
   2. Create an integration policy for the `system` integration (a standard
   default agent policy will do)
   3. Enroll an agent in this policy, and allow it to ingest some data
   4. Confirm that there are documents present in the
   `metrics-system.cpu-default` data stream, and note its backing index via
   Stack Management
   5. Create a new `1.28.1` version of the `system` integration where
   `elasticsearch.index_mode: time_series` is set and install it via
   `elastic-package install --zip`
   6. Confirm that a rollover occurs and the backing index for the
   `metrics-system.cpu-default` data stream has been updated
   
   ### Checklist
   
   Delete any items that are not applicable to this PR.
   
   - [x] [Unit or functional
   tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
   were updated or added to match the most common scenarios
   
   ---------
   
   Co-authored-by: Kibana Machine <[email protected]>
   (cherry picked from commit 22e3847)

   

   kpollich committed May 16, 2023
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