@startuml
title User creates a Cluster with KubeadmControlPlane

' -- GROUPS START ---

box #lightgreen
participant "API Server"
end box

box #violet
participant "KubeadmControlPlane Controller"
end box

' -- GROUPS END ---

note right of "KubeadmControlPlane Controller":Watches KubeadmControlPlanes,\nClusters, and owned Machines

"API Server"-->>"KubeadmControlPlane Controller": Machine Updated

"KubeadmControlPlane Controller"-> "KubeadmControlPlane Controller":Enqueues KubeadmControlPlane Reconcile

"KubeadmControlPlane Controller"-> "KubeadmControlPlane Controller":KubeadmControlPlane Controller Reconcile
activate "KubeadmControlPlane Controller"

note over "KubeadmControlPlane Controller": - ✅ KubeadmControlPlane.OwnerReferences \ncontains a Cluster

"KubeadmControlPlane Controller"->"API Server": Get Cluster
"KubeadmControlPlane Controller"<<--"API Server": Response

note over "KubeadmControlPlane Controller": - ✅ Cluster.Status.InfrastructureReady is true\n- ✅ KubeadmControlPlane instance is valid

"KubeadmControlPlane Controller"->"API Server": Get Machines matching label selector
"KubeadmControlPlane Controller"<<--"API Server": Response

opt #FFFFFFCC KubeadmControlPlane.Spec.Replicas >= 1, 1 or more existing Machines found that is "Ready"

"KubeadmControlPlane Controller"-> "KubeadmControlPlane Controller":Set KubeadmControlPlane.Status.Initialized = true

opt num Machines matches Replicas, and all Machines "Ready"

"KubeadmControlPlane Controller"-> "KubeadmControlPlane Controller":Set KubeadmControlPlane.Status.Ready = true

end

end

"KubeadmControlPlane Controller"->"API Server": Patch KubeadmControlPlane
"KubeadmControlPlane Controller"<<--"API Server": Response

hide footbox
@enduml