Add notification controller to docs

docs/components/kustomize/controller.md

@@ -15,7 +15,7 @@ Features:
 - Health assessment of the deployed workloads
 - Runs pipelines in a specific order (depends-on relationship)
 - Prunes objects removed from source (garbage collection) 
-- Reports cluster state changes (Slack/Discord)
+- Reports cluster state changes (alerting provided by notification-controller)
 
 Links:
 

docs/components/notification/controller.md

@@ -0,0 +1,16 @@
+# Notification Controller
+
+The Notification Controller is a Kubernetes operator,
+specialized in dispatching events to external systems such as
+Slack, Microsoft Teams, Discord and Rocket chat.
+
+The controller receives events via HTTP and dispatch them to external
+webhooks based on event severity and involved objects.
+
+The controller can be configured with Kubernetes custom resources that
+define how events are processed and where to dispatch them.
+
+Links:
+
+- Source code [fluxcd/notification-controller](https://github.com/fluxcd/notification-controller)
+- Specification [docs](https://github.com/fluxcd/notification-controller/tree/master/docs/spec)

docs/index.md

@@ -41,6 +41,9 @@ Components:
     - [HelmRepository CRD](components/source/helmrepositories.md)
 - [Kustomize Controller](components/kustomize/controller.md)
     - [Kustomization CRD](components/kustomize/kustomization.md)
+- [Notification Controller](components/notification/controller.md)
+    - [Provider CRD](components/notification/provider.md)
+    - [Alert CRD](components/notification/alert.md)
 - Helm Controller (TBA)
 
 To get started with the toolkit please follow this [guide](get-started/index.md).

docs/roadmap/index.md

@@ -28,12 +28,12 @@ Non-Goals
 Tasks
 
 - Review the git source and kustomize APIs
-- Design the events API
+- ~~Design the events API~~
 - Implement events in source and kustomize controllers
 - Implement Prometheus metrics in source and kustomize controllers
 - Make the kustomize-controller apply/gc events on-par with Flux v1 apply events
-- Design the notifications and events filtering API
-- Implement a notification controller for Slack, MS Teams, Discord, Rocket
+- ~~Design the notifications and events filtering API~~
+- ~~Implement a notification controller for Slack, MS Teams, Discord, Rocket~~
 - Implement the migration command in tk
 - Create a migration guide for `flux.yaml` kustomize users