Default OpenStack Cinder Storage Class (#2083)

Add possibility to create default OpenStack Cinder Storage Class

Closes: #1609

roles/kubernetes-apps/persistent_volumes/meta/main.yml

@@ -0,0 +1,8 @@
+---
+dependencies:
+  - role: kubernetes-apps/persistent_volumes/openstack
+    when:
+      - cloud_provider is defined
+      - cloud_provider in [ 'openstack' ]
+    tags:
+      - persistent_volumes_openstack

roles/kubernetes-apps/persistent_volumes/openstack/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+persistent_volumes_enabled: false

roles/kubernetes-apps/persistent_volumes/openstack/tasks/main.yml

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+---
+- name: Kubernetes Persistent Volumes | Lay down OpenStack Cinder Storage Class template
+  template:
+    src: "{{item.file}}"
+    dest: "{{kube_config_dir}}/{{item.file}}"
+  with_items:
+    - {file: openstack-storage-class.yml, type: StorageClass, name: storage-class }
+  register: manifests
+  when:
+    - inventory_hostname == groups['kube-master'][0]
+
+- name: Kubernetes Persistent Volumes | Add OpenStack Cinder Storage Class
+  kube:
+    name: "{{item.item.name}}"
+    kubectl: "{{bin_dir}}/kubectl"
+    resource: "{{item.item.type}}"
+    filename: "{{kube_config_dir}}/{{item.item.file}}"
+    state: "latest"
+  with_items: "{{ manifests.results }}"
+  when:
+    - inventory_hostname == groups['kube-master'][0]

roles/kubernetes-apps/persistent_volumes/openstack/templates/openstack-storage-class.yml

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+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: standard
+  annotations:
+    storageclass.kubernetes.io/is-default-class: "true"
+provisioner: kubernetes.io/cinder
+parameters:
+  availability: nova