From 5de1338ff14d9efd1df1589ebeb2d4ab0f268992 Mon Sep 17 00:00:00 2001
From: Fabio Rauber <fabiorauber@gmail.com>
Date: Fri, 1 Jul 2022 11:31:50 -0300
Subject: [PATCH] Implement podAntiAffinity for postfix

---
 charts/postfix/v0.1.0/templates/deployment.yaml | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/charts/postfix/v0.1.0/templates/deployment.yaml b/charts/postfix/v0.1.0/templates/deployment.yaml
index 03efe7a..71a8c30 100644
--- a/charts/postfix/v0.1.0/templates/deployment.yaml
+++ b/charts/postfix/v0.1.0/templates/deployment.yaml
@@ -63,10 +63,20 @@ spec:
       nodeSelector:
         {{- toYaml . | nindent 8 }}
       {{- end }}
-      {{- with .Values.affinity }}
       affinity:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app.kubernetes.io/name
+                    operator: In
+                    values:
+                      - {{ include "postfix.name" . }}
+                  - key: app.kubernetes.io/instance
+                    operator: In
+                    values:
+                      - {{ .Release.Name }}
+              topologyKey: "kubernetes.io/hostname"
       {{- with .Values.tolerations }}
       tolerations:
         {{- toYaml . | nindent 8 }}