## Summary
* Address https://github.com/elastic/kibana/issues/217145 - Put in place
a check to ensure we're upgrading from Kibana 8.18.0 or newer.
* Address https://github.com/elastic/kibana/issues/220521 - New attempt
at removing the `switchToModelVersionAt` property, inspired on
https://github.com/elastic/kibana/pull/219029.
The previous attempt caused a regression: index meta information started
storing _modelVersions_ that were older than the previously stored ones,
which were defaulting to 10.0.0 for SO types that did NOT define
`modelVersions`.
This was due to the removal of the applyTypeDefaults, which was ensuring
all SOs had the `switchToModelVersionAt` property set.
This flag was then used by
`src/core/packages/saved-objects/base-server-internal/src/model_version/version_map.ts`
to determine whether to use `modelVersions` or the legacy `migrations`
property in order to determine the latest model version for a given
type.
When removing the `switchToModelVersionAt` flag (and its default
backfill), the logic started defaulting to the latest `migrations`
version for those SO types that were not defining any `modelVersion`,
resulting in older versions that those stored in the SO indices. This
caused incident https://elasticco.atlassian.net/browse/INC-3818.
This regression has been shipped in 9.0.0 (the PR was
[backported](https://github.com/elastic/kibana/pull/219329)), so in top
of the cleanup, we now need to address
https://github.com/elastic/kibana/issues/220521 to ensure a smooth
transition _OnPrem => Serverless_.
---------
Co-authored-by: Christiane (Tina) Heiligers <christiane.heiligers@elastic.co>
Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
## Summary
Part of https://github.com/elastic/kibana/issues/201807
**Strategy**:
This PR assumes that `switchToModelVersionAt` has done it’s job and all
SO type owners now use `modelVersions` instead of `migrations`.
It takes the approach of trusting that this is fine™
**Changes in this PR:**
- `switchToModelVersionAt` removed from all registered saved objects, so
their mapping hash had to be updated.
- Implements `globalSwitchToModelVersionAt` directly in `version_map`
- Updates logic to prioritize `modelVersions` over `migrations` in
`getLatestMappingsModelVersion`, that previously relied on
`switchToModelVersionAt` being set
- Updates unit tests to match the refactored logic
- Updates snapshots
- Adapts SO types registered in the **cases**, **SLO** and **encrypted
saved objects** plugins.
- Updates docs
**Risks**:
- Plugin developers disregard the deprecated status of `migrations` and
introduce new versions, which will not be BWC. Saved object type hash
changes will notify the core team for a code owner review. The core team
needs to investigate the related changes and provide feedback.
### Checklist
Check the PR satisfies following conditions.
Reviewers should verify this PR satisfies this list as well.
- [x]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [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
- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)
---------
Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Saved objects declared as `hidden` can only be accessed with a client
that explicitly includes hidden types.
### Checklist
- [x]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
---------
Co-authored-by: Alejandro Fernández Haro <afharo@gmail.com>
## Summary
Added documentation explaining how SO migrations on serverless work
## Preview
<img width="741" alt="Screenshot 2024-03-22 at 16 15 13"
src="2217c01f-8447-4f22-a782-a07ff221aa42">
* Add deferred migrations parameter.
* Update outdated documents query to take into account deferred migrations.
* Update outdated documents query to take into account the core migration version.
* Update read operations in the saved objects repository to perform deferred migrations.
* Update the slugs to improve google analytics drilldown tracking
* more slug updates
* Fix some formatting issues in building blocks
* update paths
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
