Fix secret syntax
diff --git a/roles/percona_xtradb_cluster/tasks/main.yml b/roles/percona_xtradb_cluster/tasks/main.yml
index 855edc6..e854896 100644
--- a/roles/percona_xtradb_cluster/tasks/main.yml
+++ b/roles/percona_xtradb_cluster/tasks/main.yml
@@ -4,7 +4,7 @@
     state: present
     definition:
       apiVersion: v1
-      data:
+      stringData:
         clustercheck: "{{ lookup('password', '/dev/null chars=ascii_lowercase,ascii_uppercase,digits length=32') }}"
         monitor: "{{ lookup('password', '/dev/null chars=ascii_lowercase,ascii_uppercase,digits length=32') }}"
         operator: "{{ lookup('password', '/dev/null chars=ascii_lowercase,ascii_uppercase,digits length=32') }}"