# Which Problems Are Solved
Milestones used existing events from a number of aggregates. OIDC
session is one of them. We noticed in load-tests that the reduction of
the oidc_session.added event into the milestone projection is a costly
business with payload based conditionals. A milestone is reached once,
but even then we remain subscribed to the OIDC events. This requires the
projections.current_states to be updated continuously.
# How the Problems Are Solved
The milestone creation is refactored to use dedicated events instead.
The command side decides when a milestone is reached and creates the
reached event once for each milestone when required.
# Additional Changes
In order to prevent reached milestones being created twice, a migration
script is provided. When the old `projections.milestones` table exist,
the state is read from there and `v2` milestone aggregate events are
created, with the original reached and pushed dates.
# Additional Context
- Closes https://github.com/zitadel/zitadel/issues/8800
# Which Problems Are Solved
We identified the need of caching.
Currently we have a number of places where we use different ways of
caching, like go maps or LRU.
We might also want shared chaches in the future, like Redis-based or in
special SQL tables.
# How the Problems Are Solved
Define a generic Cache interface which allows different implementations.
- A noop implementation is provided and enabled as.
- An implementation using go maps is provided
- disabled in defaults.yaml
- enabled in integration tests
- Authz middleware instance objects are cached using the interface.
# Additional Changes
- Enabled integration test command raceflag
- Fix a race condition in the limits integration test client
- Fix a number of flaky integration tests. (Because zitadel is super
fast now!) 🎸🚀
# Additional Context
Related to https://github.com/zitadel/zitadel/issues/8648
# Which Problems Are Solved
Adds the possibility to mirror an existing database to a new one.
For that a new command was added `zitadel mirror`. Including it's
subcommands for a more fine grained mirror of the data.
Sub commands:
* `zitadel mirror eventstore`: copies only events and their unique
constraints
* `zitadel mirror system`: mirrors the data of the `system`-schema
* `zitadel mirror projections`: runs all projections
* `zitadel mirror auth`: copies auth requests
* `zitadel mirror verify`: counts the amount of rows in the source and
destination database and prints the diff.
The command requires one of the following flags:
* `--system`: copies all instances of the system
* `--instance <instance-id>`, `--instance <comma separated list of
instance ids>`: copies only the defined instances
The command is save to execute multiple times by adding the
`--replace`-flag. This replaces currently existing data except of the
`events`-table
# Additional Changes
A `--for-mirror`-flag was added to `zitadel setup` to prepare the new
database. The flag skips the creation of the first instances and initial
run of projections.
It is now possible to skip the creation of the first instance during
setup by setting `FirstInstance.Skip` to true in the steps
configuration.
# Additional info
It is currently not possible to merge multiple databases. See
https://github.com/zitadel/zitadel/issues/7964 for more details.
It is currently not possible to use files. See
https://github.com/zitadel/zitadel/issues/7966 for more information.
closes https://github.com/zitadel/zitadel/issues/7586
closes https://github.com/zitadel/zitadel/issues/7486
### Definition of Ready
- [x] I am happy with the code
- [x] Short description of the feature/issue is added in the pr
description
- [x] PR is linked to the corresponding user story
- [x] Acceptance criteria are met
- [x] All open todos and follow ups are defined in a new ticket and
justified
- [x] Deviations from the acceptance criteria and design are agreed with
the PO and documented.
- [x] No debug or dead code
- [x] My code has no repetitions
- [x] Critical parts are tested automatically
- [ ] Where possible E2E tests are implemented
- [x] Documentation/examples are up-to-date
- [x] All non-functional requirements are met
- [x] Functionality of the acceptance criteria is checked manually on
the dev system.
---------
Co-authored-by: Livio Spring <livio.a@gmail.com>
