Allow custom affinities for flagger deployment in helm chart

charts/flagger/README.md

@@ -164,7 +164,7 @@ The following tables lists the configurable parameters of the Flagger chart and
 | `resources.requests/memory` | Pod memory request | `32Mi` |
 | `resources.limits/cpu` | Pod CPU limit | `1000m` |
 | `resources.limits/memory` | Pod memory limit | `512Mi` |
-| `affinity` | Node/pod affinities | None  |
+| `affinity` | Node/pod affinities | prefer spread across hosts |
 | `nodeSelector` | Node labels for pod assignment | `{}` |
 | `threadiness` | Number of controller workers | `2` |
 | `tolerations` | List of node taints to tolerate | `[]` |

charts/flagger/templates/deployment.yaml

@@ -35,16 +35,10 @@ spec:
  {{- end }}
  spec:
  serviceAccountName: {{ template "flagger.serviceAccountName" . }}
+ {{- if .Values.affinity }}
  affinity:
- podAntiAffinity:
- preferredDuringSchedulingIgnoredDuringExecution:
- - weight: 100
- podAffinityTerm:
- labelSelector:
- matchLabels:
- app.kubernetes.io/name: {{ template "flagger.name" . }}
- app.kubernetes.io/instance: {{ .Release.Name }}
- topologyKey: kubernetes.io/hostname
+ {{- tpl (toYaml .Values.affinity) . | nindent 8 }}
+ {{- end }}
  {{- if .Values.image.pullSecret }}
  imagePullSecrets:
  - name: {{ .Values.image.pullSecret }}

charts/flagger/values.yaml

@@ -135,6 +135,17 @@ nodeSelector: {}
 
 tolerations: []
 
+affinity:
+ podAntiAffinity:
+ preferredDuringSchedulingIgnoredDuringExecution:
+ - weight: 100
+ podAffinityTerm:
+ labelSelector:
+ matchLabels:
+ app.kubernetes.io/name: '{{ template "flagger.name" . }}'
+ app.kubernetes.io/instance: '{{ .Release.Name }}'
+ topologyKey: kubernetes.io/hostname
+
 prometheus:
  # to be used with ingress controllers
  install: false