deploy/superset/charts/redis/templates/sentinel/ports-configmap.yaml

{{- if and (eq .Values.architecture "replication") .Values.sentinel.enabled (eq .Values.sentinel.service.type "NodePort") (not .Values.sentinel.service.nodePorts.redis ) }}
{{- /* create a list to keep track of ports we choose to use */}}
{{ $chosenports := (list ) }}

{{- /* Get list of all used nodeports */}}
{{ $usedports := (list ) }}
{{- range $index, $service := (lookup "v1" "Service" "" "").items }}
  {{- range.spec.ports }}
    {{- if .nodePort }}
      {{- $usedports = (append $usedports .nodePort) }}
    {{- end }}
  {{- end }}
{{- end }}

{{- /*
comments that start with # are rendered in the output when you debug, so you can less and search for them
Vars in the comment will be rendered out, so you can check their value this way.
https://helm.sh/docs/chart_best_practices/templates/#comments-yaml-comments-vs-template-comments

remove the template comments and leave the yaml comments to help debug
*/}}

{{- /* Sort the list */}}
{{ $usedports = $usedports | sortAlpha }}
#usedports {{ $usedports }}

{{- /* How many nodeports per service do we want to create, except for the main service which is always two */}}
{{ $numberofPortsPerNodeService := 2 }}

{{- /* for every nodeport we want, loop though the used ports to get an unused port */}}
{{- range $j := until (int (add (mul (int .Values.replica.replicaCount) $numberofPortsPerNodeService) 2)) }}
  {{- /* #j={{ $j }} */}}
  {{- $nodeport := (add $j 30000) }}
  {{- $nodeportfound := false }}
  {{- range $i := $usedports }}
    {{- /* #i={{ $i }}
    #nodeport={{ $nodeport }}
    #usedports={{ $usedports }} */}}
    {{- if and (has (toString $nodeport) $usedports) (eq $nodeportfound false) }}
      {{- /* nodeport conflicts with in use */}}
      {{- $nodeport = (add $nodeport 1) }}
    {{- else if and ( has $nodeport $chosenports) (eq $nodeportfound false) }}
      {{- /* nodeport already chosen, try another */}}
      {{- $nodeport = (add $nodeport 1) }}
    {{- else if (eq $nodeportfound false) }}
      {{- /* nodeport free to use: not already claimed and not in use */}}
      {{- /* select nodeport, and place into usedports */}}
      {{- $chosenports = (append $chosenports $nodeport) }}
      {{- $nodeportfound = true }}
    {{- else }}
      {{- /* nodeport has already been chosen and locked in, just work through the rest of the list to get to the next nodeport selection */}}
    {{- end }}
  {{- end }}
  {{- if (eq $nodeportfound false) }}
    {{- $chosenports = (append $chosenports $nodeport) }}
  {{- end }}

{{- end }}

{{- /* print the usedports and chosenports for debugging */}}
#usedports {{ $usedports }}
#chosenports {{ $chosenports }}}}

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ template "common.names.fullname" . }}-ports-configmap
  namespace: {{ .Release.Namespace | quote }}
  labels: {{- include "common.labels.standard" . | nindent 4 }}
    {{- if .Values.commonLabels }}
    {{- include "common.tplvalues.render" ( dict "value" .Values.commonLabels "context" $ ) | nindent 4 }}
    {{- end }}
  {{- if .Values.commonAnnotations }}
  annotations:
    {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
  {{- end }}
data:
{{ $portsmap := (lookup "v1" "ConfigMap" $.Release.Namespace (printf "%s-%s" ( include "common.names.fullname" . ) "ports-configmap")).data }}
{{- if $portsmap }}
{{- /* configmap already exists, do not install again */ -}}
  {{- range $name, $value := $portsmap }}
  "{{ $name }}": "{{ $value }}"
  {{- end }}
{{- else }}
{{- /* configmap being set for first time */ -}}
  {{- range $index, $port := $chosenports }}
  {{- $nodenumber := (floor (div $index 2)) }}
  {{- if (eq $index 0) }}
  "{{ template "common.names.fullname" $ }}-sentinel": "{{ $port }}"
  {{- else if (eq $index 1) }}
  "{{ template "common.names.fullname" $ }}-redis": "{{ $port }}"
  {{- else if (eq (mod $index 2) 0) }}
  "{{ template "common.names.fullname" $ }}-node-{{ (sub $nodenumber 1) }}-sentinel": "{{ $port }}"
  {{- else if (eq (mod $index 2) 1) }}
  "{{ template "common.names.fullname" $ }}-node-{{ (sub $nodenumber 1) }}-redis": "{{ $port }}"
  {{- end }}
  {{- end }}
{{- end }}
{{- end }}