Make emailleg container upgrade in the same host

charts/emailleg/v1.4.0/templates/deployment.yaml

@@ -210,8 +210,23 @@ spec:
       nodeSelector:
         {{- toYaml . | nindent 8 }}
       {{- end }}
-      {{- with .Values.affinity }}
       affinity:
+        podAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - weight: 100
+              podAffinityTerm:
+                labelSelector:
+                  matchExpressions:
+                  - key: app.kubernetes.io/name
+                    operator: In
+                    values:
+                    - {{ include "emailleg.name" . }}
+                  - key: app.kubernetes.io/instance
+                    operator: In
+                    values:
+                    - {{ .Release.Name }}
+                topologyKey: kubernetes.io/hostname
+      {{- with .Values.affinity }}
         {{- toYaml . | nindent 8 }}
       {{- end }}
       {{- with .Values.tolerations }}