understackdb: handle db name discrepancies

In our current setup, the Kubernetes resource is called 'nova-api', but
the database name is 'nova_api'.

Author: skrobul

helm-charts/understackdb/README.md

@@ -23,6 +23,7 @@ Helm chart to deploy MariaDB Database instances for Understack
 | databases | list | databases for all Understack components (horizon, ironic, nova, neutron, keystone) | list of databases to create |
 | databases[0].characterSet | string | `"utf8"` | database's character set |
 | databases[0].collate | string | `"utf8_general_ci"` | database's collation |
+| databases[0].dbname | string | value of `.name` is used if unspecified. | database name override (if different from metadata.name) |
 | databases[0].instanceName | string | `"mariadb"` | name of the `MariaDB` cluster identifier (`.spec.metadata.name` on MariaDB resource) |
 | databases[0].name | required | `"glance"` | database name |
 | databases[0].namespace | string | openstack | namespace that `Database` record will be created in |

helm-charts/understackdb/templates/databases.yaml

@@ -10,6 +10,7 @@ spec:
     name: {{ $.Values.instanceName }}
     waitForIt: true
   characterSet: {{ .characterSet | default "utf8" }}
+  name: {{ .dbname | default .name }}
   collate: {{ .collate | default "utf8_general_ci" }}
   retryInterval: {{ .retryInterval | default "5s" }}
   {{- with .extraConfig }}

helm-charts/understackdb/values.yaml

@@ -96,6 +96,9 @@ databases:
     # -- namespace that `Database` record will be created in
     # @default -- openstack
     namespace: openstack
+    # -- database name override (if different from metadata.name)
+    # @default -- value of `.name` is used if unspecified.
+    dbname:
     # -- name of the `MariaDB` cluster identifier (`.spec.metadata.name` on MariaDB resource)
     instanceName: mariadb
     # -- database's character set
@@ -111,7 +114,9 @@ databases:
   - name: neutron
   - name: nova
   - name: nova-api
+    dbname: nova_api
   - name: nova-cell0
+    dbname: nova_cell0
   - name: placement
 
 # -- list of databases to create