Add roadmap draft to docs

docs/roadmap/index.md

@@ -0,0 +1,81 @@
+# Roadmap
+
+!!! hint "Work in Progress"
+    We will be building the roadmap together with the Flux community,
+    our end-users and everyone who is interested in integrating with us.
+    So a lot of this is still TBD - read this as our shopping list of
+    ideas after some brainstorming as Flux maintainers.
+
+## The road to Flux v2
+
+### Flux read-only feature parity
+
+This would be the first stepping stone: we want the GitOps Toolkit to be on-par with today's Flux in
+[read-only mode](https://github.com/fluxcd/flux/blob/master/docs/faq.md#can-i-run-flux-with-readonly-git-access)
+and FluxCloud notifications.
+
+Goals
+
+- Offer an in-place migration tool for those that are using Flux in read-only mode to synchronize plain manifests
+- Offer a migration guide for those that are using Flux in read-only mode to synchronize Kustomize overlays
+- Offer a dedicated component for forwarding events to external messaging platforms 
+
+Non-Goals
+
+- Migrate users that are using Flux to run custom scripts with flux.yaml
+- Automate the migration of flux.yaml kustomize users
+
+Tasks
+
+- Review the git source and kustomize APIs
+- 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
+- Implement the migration command in tk
+- Create a migration guide for flux.yaml kustomize users
+
+### Flux image update feature parity
+
+Goals
+
+- Offer a dedicated component that can replace Flux v1 image update feature
+
+Non-Goals
+
+- Maintain backwards compatibility with Flux v1 annotations
+
+Tasks
+
+- Design the git push API
+- Implement git push in source controller
+- Design the image scanning API
+- Implement an image scanning controller
+- Design the manifests patching component
+- Implement the image scan/patch/push workflow
+- Integrate the new components in the toolkit assembler
+- Create a migration guide from Flux annotations
+
+## The road to Helm Operator v2
+
+### Helm v3 feature parity
+
+Goals
+
+- Offer a migration guide for those that are using Helm Operator with Helm v3 and Helm Repositories
+
+Non-Goals
+
+- Migrate users that are using Helm v2
+- Migrate users that are using Helm charts from Git
+
+Tasks
+
+- Review the helm release, chart and repository APIs
+- Design helm releases based on source API
+- Implement a helm controller for Helm v3 covering all the current release options
+- Implement events in helm controller
+- Implement prometheus metrics in helm controller
+- Create a migration guide for helm operator users

mkdocs.yml

@@ -78,3 +78,4 @@ nav:
     - Sync source: cmd/tk_sync_source.md
     - Sync source git: cmd/tk_sync_source_git.md
     - Uninstall: cmd/tk_uninstall.md
+  - Roadmap: roadmap/index.md