Add support for DCN adoption

dt/dcn_nostorage/README.md

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+# DT: DCN
+
+If you are looking for information on how to deploy the DCN DT, then
+please see the
+[DCN README in the examples directory](../../examples/dt/dcn/README.md).
+
+This directory, `architecture/dt/dcn/`, exists so that the
+[kustomization.yaml](../../examples/dt/dcn/kustomization.yaml)
+in the examples directory for the DCN DT, reference it by path as a
+component. Its contents are likely uninteresting unless you want to
+understand how kustomize was implemented in this repository.

dt/dcn_nostorage/control-plane/kustomization.yaml

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+---
+apiVersion: kustomize.config.k8s.io/v1alpha1
+kind: Component
+
+transformers:
+  # Set namespace to OpenStack on all namespaced objects without a namespace
+  - |-
+    apiVersion: builtin
+    kind: NamespaceTransformer
+    metadata:
+      name: _ignored_
+      namespace: openstack
+    setRoleBindingSubjects: none
+    unsetOnly: true
+    fieldSpecs:
+      - path: metadata/name
+        kind: Namespace
+        create: true
+
+components:
+  - ../../../lib/control-plane/
+
+replacements:
+  # Control plane custom service configs
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.nova.customServiceConfig
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.nova.template.apiServiceTemplate.customServiceConfig
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.nova.metadataServiceTemplate
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.nova.template.metadataServiceTemplate
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.nova.cellTemplates
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.nova.template.cellTemplates
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.neutron.template.customServiceConfig
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.neutron.template.customServiceConfig
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.ovn.template.ovnController.external-ids
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.ovn.template.ovnController.external-ids
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.ovn.template.ovnController.nicMappings
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.ovn.template.ovnController.nicMappings
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.cinderBackup.customServiceConfig
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.cinder.template.cinderBackup.customServiceConfig
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.cinderVolumes
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.cinder.template.cinderVolumes
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.cinderAPI.replicas
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.cinder.template.cinderAPI.replicas
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.cinder.customServiceConfig
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.cinder.template.customServiceConfig
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.cinderBackup.replicas
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.cinder.template.cinderBackup.replicas
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.glance.keystoneEndpoint
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.glance.template.keystoneEndpoint
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.glance.glanceAPIs
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.glance.template.glanceAPIs
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.manila.enabled
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.manila.enabled
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.manila.manilaAPI.customServiceConfig
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.manila.template.manilaAPI.customServiceConfig
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.manila.manilaShares
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.manila.template.manilaShares
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.galera.templates
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.galera.templates
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.rabbitmq.templates
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.rabbitmq.templates
+        options:
+          create: true
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.extraMounts
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.extraMounts
+        options:
+          create: true
+
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.octavia.enabled
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.octavia.enabled
+        options:
+          create: true
+
+  - source:
+      kind: ConfigMap
+      name: service-values
+      fieldPath: data.octavia.template
+    targets:
+      - select:
+          kind: OpenStackControlPlane
+        fieldPaths:
+          - spec.octavia.template
+        options:
+          create: true

dt/dcn_nostorage/kustomization.yaml

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+---
+apiVersion: kustomize.config.k8s.io/v1alpha1
+kind: Component
+
+secretGenerator:
+  - name: octavia-ca-passphrase
+    literals:
+      - server-ca-passphrase=12345678
+    options:
+      disableNameSuffixHash: true
+
+transformers:
+  # Set namespace to OpenStack on all namespaced objects without a namespace
+  - |-
+    apiVersion: builtin
+    kind: NamespaceTransformer
+    metadata:
+      name: _ignored_
+      namespace: openstack
+    setRoleBindingSubjects: none
+    unsetOnly: true
+    fieldSpecs:
+      - path: metadata/name
+        kind: Namespace
+        create: true
+
+components:
+  - ../../lib/networking/metallb
+  - ../../lib/networking/netconfig
+  - ../../lib/networking/nad
+  - ../../lib/control-plane
+
+resources:
+  - nad.yaml
+
+# Add storagemgmt network template, as it is needed for CephHCI
+patches:
+  - target:
+      version: v1beta1
+      kind: NetConfig
+      name: netconfig
+    patch: |-
+      - op: add
+        path: /spec/networks/-
+        value:
+          dnsDomain: _replaced_
+          name: storagemgmt
+          subnets:
+            - _replaced_
+          mtu: 1500
+
+# Add storagemgmt network replacements
+replacements:
+  # NetConfig dnsDomain specific to this VA
+  - source:
+      kind: ConfigMap
+      name: network-values
+      fieldPath: data.storagemgmt.dnsDomain
+    targets:
+      - select:
+          kind: NetConfig
+        fieldPaths:
+          - spec.networks.[name=storagemgmt].dnsDomain
+  # NetConfig MTU specific to this VA
+  - source:
+      kind: ConfigMap
+      name: network-values
+      fieldPath: data.storagemgmt.mtu
+    targets:
+      - select:
+          kind: NetConfig
+        fieldPaths:
+          - spec.networks.[name=storagemgmt].mtu
+  # NetConfig subnets specific to this VA
+  - source:
+      kind: ConfigMap
+      name: network-values
+      fieldPath: data.storagemgmt.subnets
+    targets:
+      - select:
+          kind: NetConfig
+        fieldPaths:
+          - spec.networks.[name=storagemgmt].subnets
+
+  # Octavia support
+  - source:
+      kind: ConfigMap
+      name: network-values
+      fieldPath: data.octavia.net-attach-def
+    targets:
+      - select:
+          kind: NetworkAttachmentDefinition
+          name: octavia
+        fieldPaths:
+          - spec.config

dt/dcn_nostorage/nad.yaml

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+---
+apiVersion: k8s.cni.cncf.io/v1
+kind: NetworkAttachmentDefinition
+metadata:
+  name: octavia
+  labels:
+    osp/net: octavia
+    osp/net-attach-def-type: standard

dt/dcn_nostorage/namespace.yaml

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+---
+apiVersion: builtin
+kind: NamespaceTransformer
+metadata:
+  name: _ignored_
+  namespace: openstack
+setRoleBindingSubjects: none
+unsetOnly: true
+fieldSpecs:
+  - path: metadata/name
+    kind: Namespace
+    create: true