Add support for 'fake' Cinder backend

This commit adds the ability to use the fake cinder backend
over Ceph if necessary.

Author: wilkers-steve

cinder/templates/deployment-volume.yaml

@@ -71,6 +71,7 @@ spec:
               mountPath: /etc/cinder/conf/cinder.conf
               subPath: cinder.conf
               readOnly: true
+            {{- if .Values.ceph.enabled }}
             - name: cephconf
               mountPath: /etc/ceph/ceph.conf
               subPath: ceph.conf
@@ -79,6 +80,7 @@ spec:
               mountPath: /etc/ceph/ceph.client.{{ .Values.ceph.cinder_user }}.keyring
               subPath: ceph.client.{{ .Values.ceph.cinder_user }}.keyring
               readOnly: true
+            {{- end }}
       volumes:
         - name: pod-etc-cinder
           emptyDir: {}
@@ -87,9 +89,11 @@ spec:
         - name: cinderconf
           configMap:
             name: cinder-etc
+        {{- if .Values.ceph.enabled }}
         - name: cephconf
           configMap:
             name: cinder-etc
         - name: cephclientcinderkeyring
           configMap:
             name: cinder-etc
+        {{- end }}

cinder/templates/etc/_cinder.conf.tpl

@@ -64,6 +64,7 @@ rabbit_ha_queues = true
 rabbit_hosts = {{ .Values.messaging.hosts }}
 
 [rbd1]
+volume_backend_name = rbd
 volume_driver = cinder.volume.drivers.rbd.RBDDriver
 rbd_pool = {{ .Values.backends.rbd1.pool }}
 rbd_ceph_conf = /etc/ceph/ceph.conf
@@ -78,3 +79,9 @@ rbd_secret_uuid = {{- include "secrets/ceph-client-key" . -}}
 {{- end }}
 rbd_secret_uuid = {{ .Values.backends.rbd1.secret }}
 report_discard_supported = True
+
+{{- if .Values.backends.fake.enabled }}
+[fake]
+volume_backend_name = fake
+volume_driver = cinder.tests.fake_driver.FakeLoggingVolumeDriver
+{{- end }}

cinder/values.yaml

@@ -20,6 +20,25 @@
 development:
   enabled: false
 
+backends:
+  enabled:
+  - rbd1
+  rbd1:
+    secret: null
+    user: "admin"
+    pool: "volumes"
+  fake:
+    enabled: false
+
+ceph:
+  enabled: true
+  monitors: []
+  cinder_user: "admin"
+  # a null value for the keyring will
+  # attempt to use the key from
+  # common/secrets/ceph-client-key
+  cinder_keyring: null
+
 replicas:
   api: 1
   volume: 1
@@ -77,23 +96,6 @@ database:
   cinder_password: password
   cinder_user: cinder
 
-ceph:
-  enabled: true
-  monitors: []
-  cinder_user: "admin"
-  # a null value for the keyring will
-  # attempt to use the key from
-  # common/secrets/ceph-client-key
-  cinder_keyring: null
-
-backends:
-  enabled:
-  - rbd1
-  rbd1:
-    secret: null
-    user: "admin"
-    pool: "volumes"
-
 glance:
   version: 2
 
@@ -102,7 +104,6 @@ messaging:
   user: rabbitmq
   password: password
 
-
 api:
   workers: 8
 

docs/developer/minikube.md

@@ -178,7 +178,7 @@ To deploy Openstack-Helm in development mode, ensure you've created a minikube-a
 /var/lib/docker
 ```
 
-As a result of this guidence, we recommend creating the following for MariaDB like shown below.
+As a result of this guidance, we recommend creating the following for MariaDB like shown below.
 
 ```
 $ sudo mkdir -p /data/openstack-helm/mariadb
@@ -194,6 +194,9 @@ $ kubectl label nodes openstack-control-plane=enabled --all --namespace=openstac
 ```
 ***NOTE:*** *You do not need to label your minikube cluster for `ceph-storage`, since development mode uses hostPath.*
 
+### Change Cinder Backend
+
+Currently, Cinder uses Ceph for the RBD backend out of the box. To avoid Ceph in development mode, developers can use the Cinder 'Fake' backend by both adding the `fake` driver to the list of [enabled backends](https://github.com/att-comdev/openstack-helm/blob/master/cinder/values.yaml#L87) in Cinder's values.yaml file, and changing the `enabled` flag under `fake` to true. The Fake backend allows developers to create volumes and log events. In the future, the Fake backend will be replaced with the LVM backend in development mode to allow developers to create and attach volumes to instances.
 
 ### Deploy MariaDB