Unable to change the default storage class.

[jasoncwik]

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
/kind bug

NOTE: This is a clone of kubernetes/kubernetes#66222. The original fix was done inside kubernetes core and didn't fix minikube. I will provide a PR for minikube shortly.

What happened:
Not able to change the default storage class.

What you expected to happen:
Default storage class to change.

How to reproduce it (as minimally and precisely as possible):

storageclass "standard" patched

$ kubectl describe sc standard
Name:            standard
IsDefaultClass:  No
Annotations:     kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"storage.k8s.io/v1","kind":"StorageClass","metadata":{"annotations":{"storageclass.beta.kubernetes.io/is-default-class":"true"},"labels":{"addonmanager.kubernetes.io/mode":"Reconcile"},"name":"standard","namespace":""},"provisioner":"k8s.io/minikube-hostpath"}
,storageclass.beta.kubernetes.io/is-default-class=false
Provisioner:        k8s.io/minikube-hostpath
Parameters:         <none>
ReclaimPolicy:      Delete
VolumeBindingMode:  Immediate
Events:             <none>

$ kubectl get sc
NAME                        PROVISIONER                AGE
rook-ceph-block (default)   ceph.rook.io/block         14h
standard                    k8s.io/minikube-hostpath   14h

But after few mins.

$ kubectl get sc --watch
NAME                        PROVISIONER                AGE
rook-ceph-block (default)   ceph.rook.io/block         14h
standard                    k8s.io/minikube-hostpath   14h
standard (default)   k8s.io/minikube-hostpath   14h 

$ kubectl get sc
NAME                        PROVISIONER                AGE
rook-ceph-block (default)   ceph.rook.io/block         14h
standard (default)          k8s.io/minikube-hostpath   14h

$ kubectl describe sc rook-ceph-block
Name:               rook-ceph-block
IsDefaultClass:     Yes
Annotations:        storageclass.beta.kubernetes.io/is-default-class=true
Provisioner:        ceph.rook.io/block
Parameters:         clusterNamespace=rook-ceph,pool=replicapool
ReclaimPolicy:      Delete
VolumeBindingMode:  Immediate
Events:             <none>
Anything else we need to know?:
Tried to remove the annotation but no luck.

Please provide the following details:

Environment: Ubuntu 16.04

Minikube version (use minikube version): 0.31

• OS (e.g. from /etc/os-release):
• VM Driver (e.g. cat ~/.minikube/machines/minikube/config.json | grep DriverName): none
• ISO version (e.g. cat ~/.minikube/machines/minikube/config.json | grep -i ISO or minikube ssh cat /etc/VERSION):
• Install tools:
• Others:
  The above can be generated in one go with the following commands (can be copied and pasted directly into your terminal):

minikube version
echo "";
echo "OS:";
cat /etc/os-release
echo "";
echo "VM driver:"; 
grep DriverName ~/.minikube/machines/minikube/config.json
echo "";
echo "ISO version";
grep -i ISO ~/.minikube/machines/minikube/config.json

What happened:

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Output of minikube logs (if applicable):

Anything else do we need to know:

[tstromberg]

Closing as the PR has merged. Please re-open if this is in error. Thanks!