Merge pull request #31617 from jsafrane/default-storage-class

Automatic merge from submit-queue

Deploy a default StorageClass instance on AWS and GCE

This needs a newer kubectl in kube-addons-manager container. It's quite tricky to test as I cannot push new container image to gcr.io and I must copy the newer container manually.

cc @kubernetes/sig-storage

**Release note**:
```release-note
Kubernetes now installs a default StorageClass object when deployed on AWS, GCE and
OpenStack with kube-up.sh scripts. This StorageClass will automatically provision
a PeristentVolume in corresponding cloud for a PersistentVolumeClaim that cannot be
satisfied by any existing matching PersistentVolume in Kubernetes.

To override this default provisioning, administrators must manually delete this default StorageClass.
```

cluster/saltbase/salt/kube-addons/init.sls

@@ -177,3 +177,13 @@ addon-dir-create:
     - user: root
     - group: root
     - mode: 755
+
+{% if pillar.get('enable_default_storage_class', '').lower() == 'true' and grains['cloud'] is defined and grains['cloud'] in ['aws', 'gce', 'openstack'] %}
+/etc/kubernetes/addons/storage-class/default.yaml:
+  file.managed:
+    - source: salt://kube-addons/storage-class/{{ grains['cloud'] }}/default.yaml
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+{% endif %}