feat(glance): allow users to provide configs in glance.conf.d

Allow users to provide additional projected volumes to be mounted into
the various deployments, statefulsets, and jobs that the glance chart has
in the /etc/glance/glance.conf.d/ path. This allows for users to provide
service account or database secrets via different operators as well as
provide ways to use the chart to define common deployments while being
able to have site specific overrides.

Change-Id: Ie5f9b3cbfa22711205f2658cfe3eea3e3a75a14d
Signed-off-by: Mathieu Gagné <mgagne@calavera.ca>

glance/templates/deployment-api.yaml

@@ -37,6 +37,8 @@ httpGet:
 
 {{- $serviceAccountName := "glance-api" }}
 {{ tuple $envAll "api" $serviceAccountName | include "helm-toolkit.snippets.kubernetes_pod_rbac_serviceaccount" }}
+
+{{- $etcSources := .Values.pod.etcSources.glance_api }}
 ---
 apiVersion: apps/v1
 kind: Deployment
@@ -203,6 +205,9 @@ spec:
               mountPath: /etc/glance/glance-api.conf
               subPath: glance-api.conf
               readOnly: true
+            - name: glance-etc-snippets
+              mountPath: /etc/glance/glance.conf.d/
+              readOnly: true
             - name: glance-etc
               mountPath: /etc/glance/glance-api-uwsgi.ini
               subPath: glance-api-uwsgi.ini
@@ -323,6 +328,14 @@ spec:
           secret:
             secretName: glance-etc
             defaultMode: 0444
+        - name: glance-etc-snippets
+{{- if $etcSources }}
+          projected:
+            sources:
+{{ toYaml $etcSources | indent 14 }}
+{{- else }}
+          emptyDir: {}
+{{ end }}
 {{- if eq .Values.storage "pvc" }}
         - name: glance-images
           persistentVolumeClaim:

glance/values.yaml

@@ -908,6 +908,11 @@ pod:
       glance_db_sync:
         volumeMounts:
         volumes:
+  # -- This allows users to add Kubernetes Projected Volumes to be mounted at /etc/glance/glance.conf.d/
+  ## This is a list of projected volume source objects for each deployment/statefulset/daemonset/cronjob
+  ## https://kubernetes.io/docs/concepts/storage/projected-volumes/
+  etcSources:
+    glance_api:
   replicas:
     api: 1
   lifecycle:

releasenotes/notes/glance-cbd61a1ae1e902b5.yaml

@@ -0,0 +1,7 @@
+---
+glance:
+  - |
+    Allow users to add additional sources to the Projected Volume that is mounted
+    at /etc/glance/glance.conf.d/ so they may more easily override configs or provide
+    additional configs for the various services in the chart.
+...