diff --git a/hco/env/ctrl1-wrkr3.yaml b/hco/env/ctrl1-wrkr3.yaml
index b11a8cc..ef0145b 100644
--- a/hco/env/ctrl1-wrkr3.yaml
+++ b/hco/env/ctrl1-wrkr3.yaml
@@ -1,5 +1,6 @@
 resource_registry:
   "VMInstances": ../fragments/VMInstance.yaml
+  "VMInstancesCeph": ../fragments/VMInstanceCeph.yaml
 
 parameters:
   controllers_size: 1
@@ -7,3 +8,23 @@
   image: jammy-server-cloudimg-amd64-20240417
   public_net_id: c3799996-dc8e-4477-a309-09ea6dd71946
   cluster_public_key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+  worker_metadata: {"labels": {"role":"ceph-osd-node"}}
+  workers_flavor: 'system.compact.openstack.control.ephemeral'
+  hardware_metadata: |
+    '00:00:00:00:00:00':
+      write_files:
+        - path: /usr/share/metadata/ceph.yaml
+          content: |
+            storageDevices:
+              - name: vdb
+                role: hdd
+                sizeGb: 20
+            ramGb: 8
+            cores: 2
+            # The roles will be assigned based on node labels.
+            # roles:
+            #   - mon
+            #   - mgr
+            ips:
+              - 192.168.122.101
+            crushPath: {}