Default OpenStack Cinder Storage Class (#2083)

Add possibility to create default OpenStack Cinder Storage Class

Closes: #1609

inventory/group_vars/k8s-cluster.yml

@@ -159,6 +159,9 @@ istio_enabled: false
 # Local volume provisioner deployment
 local_volumes_enabled: false
 
+# Add Persistent Volumes Storage Class for corresponding cloud provider ( OpenStack is only supported now )
+persistent_volumes_enabled: false
+
 # Make a copy of kubeconfig on the host that runs Ansible in GITDIR/artifacts
 # kubeconfig_localhost: false
 # Download kubectl onto the host that runs Ansible in GITDIR/artifacts

roles/kubernetes-apps/meta/main.yml

@@ -33,3 +33,8 @@ dependencies:
     tags:
       - apps
       - istio
+  - role: kubernetes-apps/persistent_volumes
+    when: persistent_volumes_enabled
+    tags:
+      - apps
+      - persistent_volumes

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

+---
+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

+---
+persistent_volumes_enabled: false

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

+---
+- 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

+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

roles/kubespray-defaults/defaults/main.yaml

@@ -144,6 +144,7 @@ helm_enabled: false
 istio_enabled: false
 enable_network_policy: false
 local_volumes_enabled: false
+persistent_volumes_enabled: false
 
 # Base path for local volume provisioner addon
 local_volume_base_dir: /mnt/disks