Adding common PV and PVC scripts to ./service/common folder

Since PV and PVC templates are identical for all sercices, this PS makles them
a common template. Required size parameter will be passed from service_resources.yaml
After it is commited Mariadb and Glance will be repoted to use these scripts.

TrivialFix

Change-Id: I7fd58332ce0a9623b7a72f7310681ced93e68987

services/common/common-pv.yml.j2

@@ -0,0 +1,46 @@
+{%- set resourceName = kolla_kubernetes.cli.args.service_name %}
+
+{%- if storage_provider in ["host", "ceph", "gce"] -%}
+
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: {{ resourceName }}
+spec:
+  accessModes:
+    - ReadWriteOnce
+  capacity:
+    storage: {{ kolla_kubernetes.template.vars.size_in_gb }}Gi
+{%- if storage_provider == "host" %}
+  hostPath:
+    path: /var/lib/kolla/volumes/{{ resourceName }}
+
+{%- elif storage_provider == "gce" %}
+  gcePersistentDisk:
+    pdName: {{ resourceName }}
+    fsType: ext4
+
+{%- elif storage_provider == "ceph" %}
+  rbd:
+    monitors:
+      {%- for k in storage_ceph.monitors %}
+      - "{{ k }}:6789"
+      {%- endfor %}
+    pool: {{ storage_ceph.pool }}
+    image: {{ resourceName }}
+    user: {{ storage_ceph.user }}
+    keyring: {{ storage_ceph.keyring }}
+    secretRef:
+      name: {{ storage_ceph.secretName }}
+    fsType: ext4
+    readOnly: false
+{%- endif %}
+
+{%- elif storage_provider == "aws" %}
+  # NO-OP for AWS, which supports Experimental Persistent Volume Provisioning
+  # https://github.com/kubernetes/kubernetes/blob/release-1.2/examples/experimental/persistent-volume-provisioning/README.md
+
+{%- else %}
+  {{ raise('Unknown storage_provider: check kolla-kubernetes.yml:storage_provider') }}
+
+{%- endif %}

services/common/common-pvc.yml.j2

@@ -0,0 +1,18 @@
+{%- if storage_provider in ["host", "ceph", "gce"] -%}
+
+{%- set resourceName = kolla_kubernetes.cli.args.service_name %}
+
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: {{ resourceName }}
+{%- if storage_provider in ["aws"] %}
+  annotations:
+    volume.alpha.kubernetes.io/storage-class: experimental_can_be_anything_in_kubernetes_1_2
+{%- endif %}
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: {{ kolla_kubernetes.template.vars.size_in_gb }}