@startuml controller-manager-deployment
!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Deployment.puml

title Deployment diagram for EKS-A controller manager

Container(kubeApiServer, "Kubernetes API server", "Go", "Provides read/write access to the kubernetes API objects stored in the etcd server and allows to subscribe to events when they change")

Deployment_Node(controllerManagerDeployment, "Controller Manager", "Kubernetes Deployment"){
    Deployment_Node(controllerManagerContainer, "Controller Manager", "App Container"){
        Deployment_Node(controllerManager, "Controller Manager", "Binary"){
            Container(clusterController, "Cluster controller", "controller-runtime Controller", "Reconciles EKS-A Clusters")
            Container(vsphereDatacenterController, "VSphereDatacenterConfig controller", "controller-runtime Controller", "Runs validations for VSphereDatacenterConfig that require external API calls (eg. vSphere endpoint)")
            Container(snowMachineConfigController, "SnowMachineConfig controller", "controller-runtime Controller", "Runs validations for SnowMAchineConfig that require external API calls (eg. Snow endpoint)")

            Container(clusterMutation, "Cluster mutation webhook", "K8s mutation webhook", "Sets defaults in Cluster objects before they are validated")
            Container(clusterValidation, "Cluster validation webhook", "K8s validation webhook", "Validates Cluster objects before they are accepted by the kube api server")
        }
    }
}

Container_Ext(vCenter, "vCenter Server", "VMware", "vSphere Automation API")
Rel(vsphereDatacenterController, vCenter, "Makes API calls", "JSON/HTTPS")

Container_Ext(snowAPI, "Snow API endpoint")
Rel(snowMachineConfigController, snowAPI, "Makes API calls", "JSON/HTTPS")

Rel(clusterController, kubeApiServer, "Subscribes/reads/writes", "JSON/HTTPS")
Rel(vsphereDatacenterController, kubeApiServer, "Subscribes/reads/writes", "JSON/HTTPS")
Rel(snowMachineConfigController, kubeApiServer, "Subscribes/reads/writes", "JSON/HTTPS")

Rel(kubeApiServer, clusterMutation, "Calls", "JSON/HTTPS")
Rel(kubeApiServer, clusterValidation, "Calls", "JSON/HTTPS")

SHOW_LEGEND()
@enduml