From 801e1dabed89b35702563a66c044f2351c3360a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Zvon=C3=ADk?= <tomas.zvonik@techfides.cz>
Date: Fri, 16 Dec 2022 13:55:50 +0100
Subject: [PATCH] Add option to use existing secret to Helm chart

---
 .../chart/reloader/templates/deployment.yaml        | 13 ++++++++++++-
 deployments/kubernetes/chart/reloader/values.yaml   |  9 +++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/deployments/kubernetes/chart/reloader/templates/deployment.yaml b/deployments/kubernetes/chart/reloader/templates/deployment.yaml
index d1a8b72a..10fba512 100644
--- a/deployments/kubernetes/chart/reloader/templates/deployment.yaml
+++ b/deployments/kubernetes/chart/reloader/templates/deployment.yaml
@@ -67,7 +67,7 @@ spec:
       - image: "{{ .Values.reloader.deployment.image.name }}:{{ .Values.reloader.deployment.image.tag }}"
         imagePullPolicy: {{ .Values.reloader.deployment.image.pullPolicy }}
         name: {{ template "reloader-fullname" . }}
-      {{- if or (.Values.reloader.deployment.env.open) (.Values.reloader.deployment.env.secret) (.Values.reloader.deployment.env.field) (eq .Values.reloader.watchGlobally false) (.Values.reloader.enableHA)}}
+      {{- if or (.Values.reloader.deployment.env.open) (.Values.reloader.deployment.env.secret) (.Values.reloader.deployment.env.field) (.Values.reloader.deployment.env.existing) (eq .Values.reloader.watchGlobally false) (.Values.reloader.enableHA)}}
         env:
       {{- range $name, $value := .Values.reloader.deployment.env.open }}
       {{- if not (empty $value) }}
@@ -85,6 +85,17 @@ spec:
               key: {{ $name | quote }}
       {{- end }}
       {{- end }}
+      {{- range $secret, $values := .Values.reloader.deployment.env.existing }}
+      {{- range $name, $key := $values }}
+      {{- if not ( empty $name) }}
+        - name: {{ $name | quote }}
+          valueFrom:
+            secretKeyRef:
+              name: {{ $secret | quote }}
+              key: {{ $key | quote }}
+      {{- end }}
+      {{- end }}
+      {{- end }}
       {{- range $name, $value := .Values.reloader.deployment.env.field }}
       {{- if not ( empty $value) }}
         - name: {{ $name | quote }}
diff --git a/deployments/kubernetes/chart/reloader/values.yaml b/deployments/kubernetes/chart/reloader/values.yaml
index 2f451343..1b623295 100644
--- a/deployments/kubernetes/chart/reloader/values.yaml
+++ b/deployments/kubernetes/chart/reloader/values.yaml
@@ -82,6 +82,15 @@ reloader:
       #  ALERT_ADDITIONAL_INFO: <"Additional Info like Cluster Name if needed">
       # field supports Key value pair as environment variables. It gets the values from other fields of pod.
       field:
+      # existing secret, you can specify multiple existing secrets, for each
+      # specify the env var name followed by the key in existing secret that
+      # will be used to populate the env var
+      existing:
+      #  existing_secret_name:
+      #    ALERT_ON_RELOAD: alert_on_reload_key
+      #    ALERT_SINK: alert_sink_key
+      #    ALERT_WEBHOOK_URL: alert_webhook_key
+      #    ALERT_ADDITIONAL_INFO: alert_additional_info_key
 
     # Liveness and readiness probe timeout values.
     livenessProbe: {}