# sdb-cluster-crd.yaml

This is the custom resource definition for the MemsqlCluster resource. This is the definition of the custom resource that is supplied to the Operator to generate the cluster. This adds the `MemsqlCluster` resource to the internal api-resources in the cluster so that objects of this kind can be generated.

Create a CustomResourceDefinition file to define the MemsqlCluster resource type.

```yaml
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  name: memsqlclusters.memsql.com
spec:
  group: memsql.com
  names:
    kind: MemsqlCluster
    listKind: MemsqlClusterList
    plural: memsqlclusters
    singular: memsqlcluster
    shortNames:
      - singlestore
      - singlestoredb
      - memsql
  scope: Namespaced
  versions:
  - name: v1alpha1
    served: true
    storage: true
    schema:
      openAPIV3Schema:
        description: Schema for the SingleStore Cluster
        properties:
          apiVersion:
            description: 'APIVersion defines the versioned schema of this representation
              of an object. Servers should convert recognized schemas to the latest
              internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
            type: string
          kind:
            description: 'Kind is a string value representing the REST resource this
              object represents. Servers may infer this from the endpoint the client
              submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
            type: string
          metadata:
            type: object
          spec:
            description: Spec defines the desired state of Cluster
            type: object
            x-kubernetes-preserve-unknown-fields: true
          status:
            description: Status defines the observed state of Cluster
            type: object
            x-kubernetes-preserve-unknown-fields: true
        type: object
    subresources:
      status: {}
    additionalPrinterColumns:
    - name: Aggregators
      type: integer
      description: Number of Aggregators
      jsonPath: .status.expectedAggregators
    - name: Leaves
      type: integer
      description: Number of Leaf Nodes (per availability group)
      jsonPath: .status.expectedLeaves
    - name: Redundancy Level
      type: integer
      description: Redundancy level of the Cluster
      jsonPath: .spec.redundancyLevel
    - name: Age
      type: date
      jsonPath: .metadata.creationTimestamp

```

***

Modified at: July 20, 2023

Source: [/db/v9.1/deploy/kubernetes/create-the-object-definition-files/sdb-cluster-crd-yaml/](https://docs.singlestore.com/db/v9.1/deploy/kubernetes/create-the-object-definition-files/sdb-cluster-crd-yaml/)

(An index of the documentation is available at /llms.txt)