Made a new host group for the first db in the cluster

hosts

@@ -9,6 +9,9 @@ db1-hostname
 db2-hostname
 db3-hostname
 
+[db_first_cluster_node]
+db1-hostname
+
 [proxy]
 haproxy-hostname
 

playbooks/galeradb.yml

@@ -14,13 +14,13 @@
    - include: ../roles/db/tasks/install.yml
 
 - name: Start and create cluser on first db node
-  hosts: db[0]
+  hosts: db_first_cluster_node
   user: root
   tasks:
    - include: ../roles/db/tasks/startcluster.yml
 
 - name: Start mysql on other nodes
-  hosts: db[1-2]
+  hosts: db
   user: root
   tasks:
    - include: ../roles/db/tasks/startmysql.yml