Extend NFS scenario to support cinder

We do have NFS scenario to deploy glance with NFS backend. However
we did not test cinder with NFS. With this change we extend possible
usecase of NFS server to support cinder as a backend.

Change-Id: I5bc0e5e08fdfd8f0fb90e5716cc6b9a0b1401c55

tests/roles/bootstrap-host/tasks/prepare_nfs.yml

@@ -73,6 +73,7 @@
     group: "nfs-user"
   with_items:
     - "/srv/nfs/glance"
+    - "/srv/nfs/cinder"
 
 - name: Create exports file
   lineinfile:
@@ -84,6 +85,7 @@
     create: yes
   with_items:
     - "/srv/nfs/glance"
+    - "/srv/nfs/cinder"
   register: nfs_exportfs
 
 - name: Restart nfs-server

tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2

@@ -287,7 +287,7 @@ deployment_environment_variables:
 lxc_container_networks: {}
 {% endif %}
 
-{% if 'ceph' not in bootstrap_host_scenarios_expanded %}
+{% if 'ceph' not in bootstrap_host_scenarios_expanded and 'nfs' not in bootstrap_host_scenarios_expanded %}
 cinder_backends:
   lvm:
     volume_group: cinder-volumes

tests/roles/bootstrap-host/templates/user_variables_nfs.yml.j2

@@ -6,3 +6,18 @@ glance_remote_client:
     where: "/var/lib/glance/images"
     type: "nfs"
     options: "_netdev,auto"
+cinder_default_volume_type: aio_nfs
+cinder_backends:
+  aio_nfs:
+    volume_backend_name: nfs
+    volume_driver: cinder.volume.drivers.nfs.NfsDriver
+    nfs_shares_config: /etc/cinder/nfs_shares
+    nfs_qcow2_volumes: true
+    nfs_mount_options: vers=4,nfsvers=4,noatime,rw,bg,intr,async,timeo=60
+    nfs_snapshot_support: true
+    nas_secure_file_operations: false
+    shares:
+      - ip: 172.29.244.100
+        share: /srv/nfs/cinder
+tempest_test_includelist:
+    - tempest.scenario.test_volume_boot_pattern.TestVolumeBootPattern.test_volume_boot_pattern