diff --git a/playbooks/wazuh-opendistro.yml b/playbooks/wazuh-opendistro.yml
index 271dfa5b..63b54eb2 100644
--- a/playbooks/wazuh-opendistro.yml
+++ b/playbooks/wazuh-opendistro.yml
@@ -2,3 +2,16 @@
 - hosts: es_cluster
   roles:
     - role: ../roles/opendistro/opendistro-elasticsearch
+
+  vars:
+    instances:           # A certificate will be generated for every node using the name as CN.
+      node1:
+        name: node-1
+        ip: <node-1 IP>
+      node2:
+        name: node-2
+        ip: <node-2 IP>
+      node3:
+        name: node-3
+        ip: <node-3 IP>
+