[stable/mariadb] Use global registry in secondary and/or metrics images (#12253)

Signed-off-by: Carlos Rodriguez Hernandez <crhernandez@bitnami.com>

stable/mariadb/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: mariadb
-version: 5.9.0
+version: 5.10.0
 appVersion: 10.1.38
 description: Fast, reliable, scalable, and easy to use open-source relational database system. MariaDB Server is intended for mission-critical, heavy-load production systems as well as for embedding into mass-deployed software. Highly available MariaDB cluster.
 keywords:

stable/mariadb/templates/_helpers.tpl

@@ -66,11 +66,24 @@ Also, we can't use a single if because lazy evaluation is not an option
 {{/*
 Return the proper metrics image name
 */}}
-{{- define "metrics.image" -}}
-{{- $registryName :=  .Values.metrics.image.registry -}}
+{{- define "mariadb.metrics.image" -}}
+{{- $registryName := .Values.metrics.image.registry -}}
 {{- $repositoryName := .Values.metrics.image.repository -}}
 {{- $tag := .Values.metrics.image.tag | toString -}}
-{{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
+{{/*
+Helm 2.11 supports the assignment of a value to a variable defined in a different scope,
+but Helm 2.9 and 2.10 doesn't support it, so we need to implement this if-else logic.
+Also, we can't use a single if because lazy evaluation is not an option
+*/}}
+{{- if .Values.global }}
+    {{- if .Values.global.imageRegistry }}
+        {{- printf "%s/%s:%s" .Values.global.imageRegistry $repositoryName $tag -}}
+    {{- else -}}
+        {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
+    {{- end -}}
+{{- else -}}
+    {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
+{{- end -}}
 {{- end -}}
 
 {{ template "mariadb.initdbScriptsCM" . }}

stable/mariadb/templates/master-statefulset.yaml

@@ -166,7 +166,7 @@ spec:
        {{- end }}
 {{- if .Values.metrics.enabled }}
       - name: metrics
-        image: {{ template "metrics.image" . }}
+        image: {{ template "mariadb.metrics.image" . }}
         imagePullPolicy: {{ .Values.metrics.image.pullPolicy | quote }}
         env:
         - name: MARIADB_ROOT_PASSWORD

stable/mariadb/templates/slave-statefulset.yaml

@@ -152,7 +152,7 @@ spec:
 {{- end }}
 {{- if .Values.metrics.enabled }}
       - name: metrics
-        image: {{ template "metrics.image" . }}
+        image: {{ template "mariadb.metrics.image" . }}
         imagePullPolicy: {{ .Values.metrics.image.pullPolicy | quote }}
         env:
         - name: MARIADB_MASTER_ROOT_PASSWORD