We use the flipper gem to provide feature gates in GitLab backed
with the ActiveSupportCacheStore adapter.

In a Geo setup, the primary and secondary do not share Redis state.
This means that changes to a feature on the primary do not invalidate
the cache on the secondary, leading to inconsistent behaviour.

To fix this send a cache invalidation event via the Geo log cursor
whenever features are changed.

Expires the cache of the given key when the secondary node
gets a Geo::CacheInvalidationEvent.

These changes introduce a new Geo event that can be triggered
to invalidate the cache for a specific key on Geo secondaries.

This event is necessary because enabling/disabling features does
not propagate correctly to Geo secondaries. It could be used for
other caches in the future (or existing caches that we currently
set to very short expiration periods on the secondary).

Rename Admin Area "Geo Nodes" nav item to "Geo"

Closes #7712

See merge request gitlab-org/gitlab-ee!7466

[EE] Improve the MR documentation

See merge request gitlab-org/gitlab-ee!7797

Add subscribe filter to labels page

See merge request gitlab-org/gitlab-ee!7724

EE port of Renders empty states in the Vue app in Job page

See merge request gitlab-org/gitlab-ee!7794

Support short reference to epics from project entities

Closes #7287

See merge request gitlab-org/gitlab-ee!7475

Signed-off-by: Rémy Coutable <remy@rymai.me>

Update CE-to-EE docs for 11.4

See merge request gitlab-org/gitlab-ee!7741

Docs: add product badge to Code Owners

See merge request gitlab-org/gitlab-ee!7767

Support autocomplete for commands in group entities

Closes #7723

See merge request gitlab-org/gitlab-ee!7588

Update DB model for security reports

See merge request gitlab-org/gitlab-ee!7779

Show promotion for epics on issues

See merge request gitlab-org/gitlab-ee!7602

Feature flags MVC

See merge request gitlab-org/gitlab-ee!7433

Simplify runner registration token resetting

See merge request gitlab-org/gitlab-ee!7511

Refactor labels_filter_path method to be consistent with other similar
methods like search_filter_path, milestones_filter_path etc.

Also move repeating code in labels index page nav into shared partial
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

CE upstream - 2018-10-03 09:21 UTC

See merge request gitlab-org/gitlab-ee!7781