Switch glance store backend to swift

This provides the options to move the glance store
to swift. We leave the default value to pvc so as
not to break existing deployments accidently. Howerver,
providing a override on the helm command to --storage=swift
will deploy a glance with swift backend.

These values should be overwritten in your region
specific secrets file to ensure no mistake.

helm-configs/glance/glance-helm-overrides.yaml

@@ -1,5 +1,5 @@
 # radosgw, rbd, swift or pvc
-storage: pvc  # This should likely be set to swift or rbd in production
+storage: swift # Use override to switch to pvc or rbd
 
 labels:
   api:
@@ -251,6 +251,9 @@ conf:
       rbd_store_ceph_conf: /etc/ceph/ceph.conf
       filesystem_store_datadir: /var/lib/glance/images
       default_swift_reference: ref1
+      swift_auth_address: https://swift.cluster.local
+      swift_user: glance:glance-store
+      swift_password: override_from_your_secrets_files
       swift_store_container: glance
       swift_store_create_container_on_put: true
       swift_store_config_file: /etc/glance/swift-store.conf
@@ -367,6 +370,11 @@ conf:
     auth_address = {{ tuple "ceph_object_store" "public" "api" . | include "helm-toolkit.endpoints.keystone_endpoint_uri_lookup" }}
     user = {{ .Values.endpoints.ceph_object_store.auth.glance.username }}:swift
     key = {{ .Values.endpoints.ceph_object_store.auth.glance.password }}
+    {{- else if eq .Values.storage "swift" }}
+    auth_version = 1
+    auth_address = {{ .Values.conf.glance.glance_store.swift_auth_address }}
+    user = {{ .Values.conf.glance.glance_store.swift_user }}
+    key = {{ .Values.conf.glance.glance_store.swift_password }}
     {{- else }}
     user = {{ .Values.endpoints.identity.auth.glance.project_name }}:{{ .Values.endpoints.identity.auth.glance.username }}
     key = {{ .Values.endpoints.identity.auth.glance.password }}