From 03027f15fc77cf540593e50ef9263a9e1f9c4077 Mon Sep 17 00:00:00 2001
From: Fabio Rauber <fabiorauber@gmail.com>
Date: Thu, 30 Jun 2022 09:28:08 -0300
Subject: [PATCH] Implement podAntiAffinity for nginx

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

diff --git a/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml b/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml
index c344891..8257698 100644
--- a/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml
+++ b/charts/mailproxy/v0.1.0/templates/nginx-deployment.yaml
@@ -64,10 +64,20 @@ 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 "mailproxy.name" . }}
+                  - key: app.kubernetes.io/instance
+                    operator: In
+                    values:
+                      - {{ .Release.Name }}
+              topologyKey: "kubernetes.io/hostname"
       {{- with .Values.tolerations }}
       tolerations:
         {{- toYaml . | nindent 8 }}