helm/core/templates/deployment.yaml

{{- if eq .Values.gateway.kind "Deployment" -}}
{{- if eq .Values.gateway.unprivilegedPortSupported nil -}}
  {{- $unprivilegedPortSupported := true }}
  {{- range $index, $node := (lookup "v1" "Node" "default" "").items }}
    {{- $kernelVersion := $node.status.nodeInfo.kernelVersion }}
    {{- if $kernelVersion }}
      {{- $kernelVersion = regexFind "^(\\d+\\.\\d+\\.\\d+)" $kernelVersion }}
      {{- if and $kernelVersion (semverCompare "<4.11.0" $kernelVersion) }}
      {{- $unprivilegedPortSupported = false }}
      {{- end }}
    {{- end }}
  {{- end -}}
  {{- $_ := set .Values.gateway "unprivilegedPortSupported" $unprivilegedPortSupported -}}
{{- end -}}

apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ include "gateway.name" . }}
  namespace: {{ .Release.Namespace }}
  labels:
    {{- include "gateway.labels" . | nindent 4}}
  annotations:
    {{- .Values.gateway.annotations | toYaml | nindent 4 }}
spec:
  {{- if not .Values.gateway.autoscaling.enabled }}
  {{- if not (or .Values.global.local .Values.global.kind) }}
  replicas: {{ .Values.gateway.replicas }}
  {{- else }}
  replicas: 1
  {{- end }}
  {{- end }}
  selector:
    matchLabels:
      {{- include "gateway.selectorLabels" . | nindent 6 }}
  strategy:
    rollingUpdate:
      maxSurge: {{ .Values.gateway.rollingMaxSurge }}
      {{- if or .Values.global.local .Values.global.kind }}
      maxUnavailable: 100%
      {{- else }}
      maxUnavailable: {{ .Values.gateway.rollingMaxUnavailable }}
      {{- end }}

  {{- include "gateway.podTemplate" $ | nindent 2 -}}

{{- end }}