From playing with mermaid whiteboard

flowchart LR
 subgraph catalogd["Catalogd"]
        ClusterCatalogController["Cluster Catalog Controller"]
        CatalogdHttpServer["Catalogd HTTP Server"]
        CatalogdCache["Catalogd Content Cache"]
  end
 subgraph s1["k8s cluster"]
        catalogd
        ClusterCatalog["ClusterCatalog"]
        ClusterExtensionController["Cluster Extension Controller"]
  end
    n1(["Catalog Admin"]) --Creates--> ClusterCatalog
    ClusterCatalogController -- Reconciles --> ClusterCatalog
    CatalogdHttpServer --Reads--> CatalogdCache
    ClusterCatalogController --UnpacksTo--> CatalogdCache
    client(["Catalog Client"]) --Queries--> CatalogdHttpServer
    ClusterExtensionController --Queries--> CatalogdHttpServer
    c1(["Catalog Author"]) --PushesTo--> r1["Image Registry"]
    r1 --> ClusterCatalogController

catalogd states
former

stateDiagram-v2
  direction LR
  [*] --> PendingSt
    state PendingSt {
        [*] --> Unpack/Pending
        Unpack/Pending --> [*]
    }
    PendingSt --> UnpackingSt
    state UnpackingSt {
        [*] --> Unpacking
        state Success <<choice>>
        Unpacking --> Success
        Success --> Failing
        Success --> Unpacked
        Failing --> [*]
        Unpacked --> [*]
    }
    

stateDiagram-v2
  direction LR
  [*] --> Pending
  Pending --> Unpacking
  state Unpacking {
    IntlPending : Pending
    [*] --> IntlPending
    IntlPending --> UnpackSuccessful
    IntlPending --> UnpackFailed
  }
  Pending --> Failing
  Unpacking --> Unpacked
  Unpacked --> [*]
  state Unpacked {
    [*] --> FailedToStore
  }
  Failing --> Pending

PhasePending = "Pending"
PhaseUnpacking = "Unpacking"
PhaseFailing = "Failing"
PhaseUnpacked = "Unpacked"

ReasonUnpackPending = "UnpackPending"
ReasonUnpacking = "Unpacking"
ReasonUnpackSuccessful = "UnpackSuccessful"
ReasonUnpackFailed = "UnpackFailed"
ReasonStorageFailed = "FailedToStore"
ReasonStorageDeleteFailed = "FailedToDelete"