Fetch the pod's HOSTNAME via downward API and pass it as env.var

... when the pod is deployed as part of an StatefulSet, so it can
determine its identity on startup and pick the right config file
from the '*-configfiles' mount.

revad/Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v2
 name: revad
 description: The Reva daemon (revad) helm chart
 type: application
-version: 1.2.2
+version: 1.2.4
 appVersion: v1.2.1
 icon: https://reva.link/logo.svg
 home: https://reva.link

revad/templates/deployment.yaml

@@ -35,7 +35,7 @@ spec:
           args:
               - "-c"
               {{- if .Values.useStatefulSet }}
-              - "/etc/revad/${HOSTNAME}.toml"
+              - "/etc/revad/$(HOSTNAME).toml"
               {{- else }}
               - "/etc/revad/revad.toml"
               {{- end }}
@@ -50,9 +50,17 @@ spec:
             {{- if .Values.extraVolumeMounts }}
               {{ toYaml .Values.extraVolumeMounts | nindent 12 }}
             {{- end }}
-          {{- if .Values.env }}
+          {{- if or .Values.env .Values.useStatefulSet }}
           env:
-              {{ toYaml .Values.env | nindent 12}}
+            {{- if .Values.useStatefulSet }}
+            - name: HOSTNAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            {{- end }}
+            {{- if .Values.env }}
+            {{ toYaml .Values.env | nindent 12 }}
+            {{- end }}
           {{- end }}
       volumes:
         - name: {{ include "revad.fullname" . }}-configfiles