ceph: preserve volume claim template metadata in schema

The schema generation was not generating the metadata properties
under the VolumeClaimTemplate type, resulting in the properties being
ignored by the api server. The preserve unknown fields tag was
not working recursively on the volumeClaimTemplates since the subtypes
were defined. Now we post-process the schema so we can preserve
the unknown fields for the volume claim templates metadata.

We now use 'yq' to hot-fix the CRDs, the only 'downside' is that 'yq'
will not preserve the existing formatting, this is a known problem:

mikefarah/yq#465

Signed-off-by: Sébastien Han <[email protected]>

Author: leseb

Diff for: build/crds/build-crds.sh

@@ -46,6 +46,13 @@ copy_ob_obc_crds() {
 generating_crds_v1() {
   echo "Generating v1 in crds.yaml"
   "$CONTROLLER_GEN_BIN_PATH" "$CRD_OPTIONS" paths="./pkg/apis/ceph.rook.io/v1" output:crd:artifacts:config="$OLM_CATALOG_DIR"
+  $YQ_BIN_PATH w -i cluster/olm/ceph/deploy/crds/ceph.rook.io_cephclusters.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.mon.properties.stretchCluster.properties.zones.items.properties.volumeClaimTemplate.properties.metadata.x-kubernetes-preserve-unknown-fields true
+  $YQ_BIN_PATH w -i cluster/olm/ceph/deploy/crds/ceph.rook.io_cephclusters.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.mon.properties.volumeClaimTemplate.properties.metadata.x-kubernetes-preserve-unknown-fields true
+  $YQ_BIN_PATH w -i cluster/olm/ceph/deploy/crds/ceph.rook.io_cephclusters.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.storage.properties.volumeClaimTemplates.items.properties.metadata.x-kubernetes-preserve-unknown-fields true
+  $YQ_BIN_PATH w -i cluster/olm/ceph/deploy/crds/ceph.rook.io_cephclusters.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.storage.properties.nodes.items.properties.volumeClaimTemplates.items.properties.metadata.x-kubernetes-preserve-unknown-fields true
+  $YQ_BIN_PATH w -i cluster/olm/ceph/deploy/crds/ceph.rook.io_cephclusters.yaml spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.storage.properties.storageClassDeviceSets.items.properties.volumeClaimTemplates.items.properties.metadata.x-kubernetes-preserve-unknown-fields true
+  # fixes a bug in yq: https://github.com/mikefarah/yq/issues/351 where the '---' gets removed
+  sed -i '1i ---' cluster/olm/ceph/deploy/crds/ceph.rook.io_cephclusters.yaml
 }
 
 generating_crds_v1alpha2() {

Diff for: cluster/charts/rook-ceph/templates/resources.yaml

@@ -818,6 +818,7 @@ spec:
                                   metadata:
                                     description: 'Standard object''s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata'
                                     type: object
+                                    x-kubernetes-preserve-unknown-fields: true
                                   spec:
                                     description: 'Spec defines the desired characteristics of a volume requested by a pod author. More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims'
                                     properties:
@@ -972,6 +973,7 @@ spec:
                         metadata:
                           description: 'Standard object''s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata'
                           type: object
+                          x-kubernetes-preserve-unknown-fields: true
                         spec:
                           description: 'Spec defines the desired characteristics of a volume requested by a pod author. More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims'
                           properties:
@@ -1793,6 +1795,7 @@ spec:
                                 metadata:
                                   description: 'Standard object''s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata'
                                   type: object
+                                  x-kubernetes-preserve-unknown-fields: true
                                 spec:
                                   description: 'Spec defines the desired characteristics of a volume requested by a pod author. More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims'
                                   properties:
@@ -2839,6 +2842,7 @@ spec:
                                 metadata:
                                   description: 'Standard object''s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata'
                                   type: object
+                                  x-kubernetes-preserve-unknown-fields: true
                                 spec:
                                   description: 'Spec defines the desired characteristics of a volume requested by a pod author. More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims'
                                   properties:
@@ -3004,6 +3008,7 @@ spec:
                           metadata:
                             description: 'Standard object''s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata'
                             type: object
+                            x-kubernetes-preserve-unknown-fields: true
                           spec:
                             description: 'Spec defines the desired characteristics of a volume requested by a pod author. More info: https://kubernetes.io/docs/concepts/storage/persistent-volumes#persistentvolumeclaims'
                             properties: