diff --git a/ansible/group_vars/omeroreadonly-hosts.yml b/ansible/group_vars/omeroreadonly-hosts.yml
index 4e006893..d4e23859 100644
--- a/ansible/group_vars/omeroreadonly-hosts.yml
+++ b/ansible/group_vars/omeroreadonly-hosts.yml
@@ -11,3 +11,13 @@ idr_omero_web_user_dropdown: false
 # Set this to 'ro' to mount /data/BioFormatsCache on read-only servers as
 # read-only, default is 'rw'
 # idr_bioformatscache_readwrite:
+
+# MS variables
+
+omero_ms_image_region_update_nginx: true
+omero_ms_image_region_db_url:  {{ omero_db_host_ansible }}
+omero_ms_image_region_db_name: idr
+omero_ms_image_region_db_username: omeroreadonly
+omero_ms_image_region_db_pass: {{ omero_server_dbpassword }}
+omero_data_dir: /data/OMERO
+omero_ms_image_region_session_id: sessionid_{{ idr_environment | default('idr') }}
diff --git a/ansible/idr-ms-image-region.yml b/ansible/idr-ms-image-region.yml
deleted file mode 100644
index 814a4250..00000000
--- a/ansible/idr-ms-image-region.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-- hosts: "{{ idr_environment | default('idr') }}-omeroreadonly-hosts"
-  become: true
-
-  pre_tasks:
-    - name: get database host
-      set_fact:
-        database_server_url: >-
-          {{
-            hostvars[groups[idr_environment | default('idr') + '-database-hosts'][0]]
-            ['ansible_' + (idr_net_iface | default('eth0'))]['ipv4']['address']
-          }}
-    - name: get database password
-      set_fact: >-
-        database_user_password: "{{ idr_secret_postgresql_password_ro | default('omero') }}"
-  roles:
-    - role: ome.omero_ms_image_region
-      omero_ms_image_region_update_nginx: true
-      omero_ms_image_region_db_url: {{ datab  ase_server_url }}
-      omero_ms_image_region_db_name: idr
-      omero_ms_image_region_db_username: omeroreadonly
-      omero_ms_image_region_db_pass: {{ database_user_password }}
-      omero_data_dir: /data/OMERO
-      omero_ms_image_region_session_id: sessionid_{{ idr_environment | default('idr') }}
diff --git a/ansible/idr-omero-readonly.yml b/ansible/idr-omero-readonly.yml
index fa5ef299..a657e922 100644
--- a/ansible/idr-omero-readonly.yml
+++ b/ansible/idr-omero-readonly.yml
@@ -229,3 +229,15 @@
         path: "{{ omero_common_basedir }}/server/OMERO.server/lib/scripts/omero"
         state: absent
       notify: restart omero-server
+
+# deploy ms
+# This will modify the omero web nginx configuration file
+# It should be executed after running idr-omero-web.yml
+# as it is in idr-01-install-idr.yml
+- hosts: "{{ idr_environment | default('idr') }}-omeroreadonly-hosts"
+  become: true
+
+  roles:
+  - role: ome.omero_ms_image_region
+
+  environment: "{{ idr_ANSIBLE_ENVIRONMENT_VARIABLES | default({}) }}"