diff --git a/README.md b/README.md
index 4fac75f..fb323ad 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 # MinioK8sBuckets
 
-Automatically create Minio buckets based on K8S CRD.
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+Automatically create Minio buckets based on K8S CRD.
+
+WIP, early project
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diff --git a/crd/minio-instance.yaml b/crd/minio-instance.yaml
new file mode 100644
index 0000000..a4a48a5
--- /dev/null
+++ b/crd/minio-instance.yaml
@@ -0,0 +1,48 @@
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  # name must match the spec fields below, and be in the form: <plural>.<group>
+  name: minioinstances.communiquons.org
+spec:
+  # group name to use for REST API: /apis/<group>/<version>
+  group: communiquons.org
+  # list of versions supported by this CustomResourceDefinition
+  versions:
+    - name: v1
+      # Each version can be enabled/disabled by Served flag.
+      served: true
+      # One and only one version must be marked as the storage version.
+      storage: true
+      schema:
+        openAPIV3Schema:
+          type: object
+          properties:
+            spec:
+              type: object
+              description: Information about how to reach the Minio bucket
+              properties:
+                endpoint:
+                  description: The URL where the Minio API can be reached
+                  example: https://minio.communiquons.org
+                  type: string
+                credentials:
+                  description: |
+                    The name of the secret containings privilegied / root credentials of Minio instance
+
+                    The secret must contains two fields :
+                    * An access key named `accessKey`
+                    * A secret key named `secretKey`
+                  type: string
+                  example: minio-root
+  # either Namespaced or Cluster
+  scope: Namespaced
+  names:
+    # plural name to be used in the URL: /apis/<group>/<version>/<plural>
+    plural: minioinstances
+    # singular name to be used as an alias on the CLI and for display
+    singular: minioinstance
+    # kind is normally the CamelCased singular type. Your resource manifests use this.
+    kind: MinioInstance
+    # shortNames allow shorter string to match your resource on the CLI
+    shortNames:
+    - mis
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