[WIP] Adapt webhosting-operator to external sharding implementation

docs/getting-started.md

@@ -8,6 +8,11 @@ To experience how they work, the webhosting-operator is deployed in the followin
 While webhosting-operator is developed in the same repository, it only serves as an example.
 Sharding support can be implemented in any other controller and programming language as well, so that it works well with the sharding components from this project.
 
+> [!NOTE]
+> The external sharding components are work in progress.
+> While the following steps also deploy the new sharding components, they are not activated for now (no `ClusterRing` object is created).
+> Instead, the existing sharding implementation in controller-runtime embedded in webhosting-operator is used.
+
 ## Quick Start
 
 ```bash

webhosting-operator/config/manager/clusterring/clusterring.yaml

@@ -0,0 +1,15 @@
+apiVersion: sharding.timebertt.dev/v1alpha1
+kind: ClusterRing
+metadata:
+  name: operator
+spec:
+  kinds:
+  - apiGroup: webhosting.timebertt.dev
+    kind: Website
+    controlledKinds:
+    - apiGroup: apps
+      kind: Deployment
+    - kind: ConfigMap
+    - kind: Service
+    - apiGroup: networking.k8s.io
+      kind: Ingress

webhosting-operator/config/manager/clusterring/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+- clusterring.yaml

webhosting-operator/go.mod

@@ -25,7 +25,7 @@ require (
 )
 
 // https://github.com/timebertt/controller-runtime/tree/sharding-0.15
-replace sigs.k8s.io/controller-runtime => github.com/timebertt/controller-runtime v0.6.1-0.20230910160759-61c8e6d9a2de
+replace sigs.k8s.io/controller-runtime => github.com/timebertt/controller-runtime v0.6.1-0.20231103173444-c2f2d2ddd36b
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect

webhosting-operator/go.sum

@@ -149,8 +149,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/timebertt/controller-runtime v0.6.1-0.20230910160759-61c8e6d9a2de h1:LxfB3lU0Su0pjmdqB3NsI5oIF4835lhFqPH+RNbJ1mM=
-github.com/timebertt/controller-runtime v0.6.1-0.20230910160759-61c8e6d9a2de/go.mod h1:dC7gCD9Y6rWUT9YaaCuR/kHLZqppXydmPLCc/2KffF4=
+github.com/timebertt/controller-runtime v0.6.1-0.20231103173444-c2f2d2ddd36b h1:6lRmAbgfx8z5A+7y6JgNIIQ//l7RBIm00UJzu6l8KfQ=
+github.com/timebertt/controller-runtime v0.6.1-0.20231103173444-c2f2d2ddd36b/go.mod h1:LBDKEuL9yGGrRraKBF6dSprE/R33ehmfCDYnh3fexwA=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=

webhosting-operator/skaffold.yaml

@@ -80,6 +80,30 @@ profiles:
     path: /manifests/kustomize/paths/0
     value: config/manager/shoot-non-sharded
 ---
+# This is an optional module that activates the external sharding implementation by deploying the ClusterRing object.
+# Set the USE_CLUSTERRING env var to true to activate this module.
+# We keep this optional for now until the external sharding implementation is fully implemented so that we don't break
+# trying out the existing implementation.
+apiVersion: skaffold/v4beta6
+kind: Config
+metadata:
+  name: clusterring
+profiles:
+- name: clusterring
+  activation:
+  - command: USE_CLUSTERRING=true
+  manifests:
+    kustomize:
+      paths:
+      - config/manager/clusterring
+  deploy:
+    kubectl:
+      defaultNamespace: ""
+      flags:
+        apply:
+        - --server-side
+        - --force-conflicts
+---
 apiVersion: skaffold/v4beta6
 kind: Config
 metadata: