feat(chart): new value image.tagSuffix for container flavor selection

deploy/charts/x509-certificate-exporter/README.md

@@ -311,6 +311,7 @@ in the container namespace.
 | image.registry | string | `"docker.io"` | x509-certificate-exporter image registry |
 | image.repository | string | `"enix/x509-certificate-exporter"` | x509-certificate-exporter image repository |
 | image.tag | string | `nil` | x509-certificate-exporter image tag (defaults to Chart appVersion) |
+| image.tagSuffix | string | `nil` | Suffix added to image tags for container flavor selection (could be `-busybox`, `-alpine`, or `-scratch`) |
 | image.pullPolicy | string | `"IfNotPresent"` | x509-certificate-exporter image pull policy |
 | psp.create | bool | `false` | Should Pod Security Policy resources be created |
 | rbac.create | bool | `true` | Should RBAC resources be created |

deploy/charts/x509-certificate-exporter/templates/_helpers.tpl

@@ -60,7 +60,7 @@ Return the proper x509-certificate-exporter image name
 {{- define "x509-certificate-exporter.image" -}}
 {{- $registryName := .Values.image.registry -}}
 {{- $repositoryName := .Values.image.repository -}}
-{{- $tag := default .Chart.AppVersion .Values.image.tag | toString -}}
+{{- $tag := printf "%s%s" ( default .Chart.AppVersion .Values.image.tag | toString ) ( .Values.image.tagSuffix | toString ) -}}
 {{/*
 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.

deploy/charts/x509-certificate-exporter/values.yaml

@@ -30,6 +30,8 @@ image:
   repository: enix/x509-certificate-exporter
   # -- x509-certificate-exporter image tag (defaults to Chart appVersion)
   tag:
+  # -- Suffix added to image tags for container flavor selection (could be `-busybox`, `-alpine`, or `-scratch`)
+  tagSuffix:
   # -- x509-certificate-exporter image pull policy
   pullPolicy: IfNotPresent