Lab-15.1 Pending status issue Installing MariaDb with Helm

Hi everybody! I followed the steps in lab-15.1 installing mariadb via Helm package manager.

helm --debug install stable/mariadb

Once done, the status of the pod is pending.

master $ kubectl get po

NAME                                             READY     
alliterating-starfish-mariadb-69f5c444d7-8g5g9   0/1       

STATUS    RESTARTS   AGE

Pending   0          18m

Looking into the PVC that the pod makes, it has the following error:

master $ kubectl describe pvc alliterating-starfish-mariadb
Name:          alliterating-starfish-mariadb
Namespace:     default
StorageClass:
Status:        Pending
Volume:
Labels:        app=mariadb
               chart=mariadb-3.0.3
               heritage=Tiller
               release=alliterating-starfish
Annotations:   <none>
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
Events:
  Type    Reason         Age                From                         Message
  ----    ------         ----               ----                         -------
  Normal  FailedBinding  4m (x63 over 19m)  persistentvolume-controller  no persistent
 volumes available for this claim and no storage class is set

¿Any help on how to resolve this error?: no persistent volumes available for this claim and no storage class is set 

Thanks!