Setup skeleton for in-place updates implementation

Signed-off-by: Alexandr Demicev <alexandr.demicev@suse.com>

Author: alexander-demicev

controlplane/config/manager/manager.yaml

@@ -25,7 +25,7 @@ spec:
         - "--diagnostics-address=${CAPRKE2_DIAGNOSTICS_ADDRESS:=:8443}"
         - "--insecure-diagnostics=${CAPRKE2_INSECURE_DIAGNOSTICS:=false}"
         - "--v=${CAPRKE2_DEBUG_LEVEL:=0}"
-        - "--concurrency=${CONCURRENCY_NUMBER:=10}"
+        - "--feature-gates=InPlaceUpdates=${EXP_IN_PLACE_UPDATES:=false}"
         image: controller:latest
         name: manager
         env:

controlplane/internal/controllers/rke2controlplane_controller.go

@@ -47,6 +47,7 @@ import (
 	clusterv1 "sigs.k8s.io/cluster-api/api/core/v1beta2"
 	"sigs.k8s.io/cluster-api/controllers/clustercache"
 	"sigs.k8s.io/cluster-api/controllers/remote"
+	runtimeclient "sigs.k8s.io/cluster-api/exp/runtime/client"
 	"sigs.k8s.io/cluster-api/util"
 	"sigs.k8s.io/cluster-api/util/annotations"
 	"sigs.k8s.io/cluster-api/util/cache"
@@ -93,6 +94,9 @@ type RKE2ControlPlaneReconciler struct {
 
 	SecretCachingClient client.Client
 
+	// RuntimeClient is the runtime client to interact with extensions.
+	RuntimeClient runtimeclient.Client
+
 	// WatchFilterValue is the label value used to filter events prior to reconciliation.
 	WatchFilterValue string
 
@@ -112,6 +116,7 @@ type RKE2ControlPlaneReconciler struct {
 // +kubebuilder:rbac:groups="bootstrap.cluster.x-k8s.io",resources=rke2configs,verbs=get;list;watch;create;patch;delete
 // +kubebuilder:rbac:groups="infrastructure.cluster.x-k8s.io",resources=*,verbs=get;list;watch;create;patch;delete
 // +kubebuilder:rbac:groups="apiextensions.k8s.io",resources=customresourcedefinitions,verbs=get;list;watch
+// +kubebuilder:rbac:groups=runtime.cluster.x-k8s.io,resources=extensionconfigs,verbs=get;list;watch
 
 // Reconcile is part of the main kubernetes reconciliation loop which aims to
 // move the current state of the cluster closer to the desired state.