couchdb/templates/_helpers.tpl

{{/* vim: set filetype=mustache: */}}
{{/*
Expand the name of the chart.
*/}}
{{- define "couchdb.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
{{- end -}}

{{/*
Create a default fully qualified app name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
*/}}
{{- define "couchdb.fullname" -}}
{{- if .Values.fullnameOverride -}}
{{- printf "%s-%s" .Values.fullnameOverride .Chart.Name | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- $name := default .Chart.Name .Values.nameOverride -}}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- end -}}

{{/*
In the event that we create both a headless service and a traditional one,
ensure that the latter gets a unique name.
*/}}
{{- define "couchdb.svcname" -}}
{{- if .Values.fullnameOverride -}}
{{- printf "%s-svc-%s" .Values.fullnameOverride .Chart.Name | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- $name := default .Chart.Name .Values.nameOverride -}}
{{- printf "%s-svc-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- end -}}

{{/*
Create a random string if the supplied key does not exist
*/}}
{{- define "couchdb.defaultsecret" -}}
{{- if . -}}
{{- . | b64enc | quote -}}
{{- else -}}
{{- randAlphaNum 20 | b64enc | quote -}}
{{- end -}}
{{- end -}}

{{- /*
Create a random string if the supplied "secret" key does not exist. Otherwise create the key in a persistent fashion
using `lookup` and `get`. The "key", "ns", and "secretName" keys need to be provided for this to work
*/ -}}
{{- define "couchdb.defaultsecret-stateful" -}}
  {{- if .secret -}}
    {{- .secret | b64enc | quote -}}
  {{- else -}}
    {{- /* generate secret, which will be overwritten if already exists */ -}}
    {{- $autoSecret := randAlphaNum 20 | b64enc -}}
    {{- if and (not (empty .key)) (not (empty .secretName)) }}
      {{- $currentSecret := lookup "v1" "Secret" .ns .secretName }}
      {{- if $currentSecret }}
        {{- /* already exists, looking up */ -}}
        {{- $autoSecret = get $currentSecret.data .key -}}
      {{- end }}
    {{- end }}
    {{- print $autoSecret | quote -}}
  {{- end -}}
{{- end -}}

{{/*
Labels used to define Pods in the CouchDB statefulset
*/}}
{{- define "couchdb.ss.selector" -}}
app: {{ template "couchdb.name" . }}
release: {{ .Release.Name }}
{{- end -}}

{{/*
Generates a comma delimited list of nodes in the cluster
*/}}
{{- define "couchdb.seedlist" -}}
{{- $nodeCount :=  min 5 .Values.clusterSize | int }}
  {{- range $index0 := until $nodeCount -}}
    {{- $index1 := $index0 | add1 -}}
    {{ $.Values.erlangFlags.name }}@{{ template "couchdb.fullname" $ }}-{{ $index0 }}.{{ template "couchdb.fullname" $ }}.{{ $.Release.Namespace }}.svc.{{ $.Values.dns.clusterDomainSuffix }}{{ if ne $index1 $nodeCount }},{{ end }}
  {{- end -}}
{{- end -}}

{{/*
If serviceAccount.name is specified, use that, else use the couchdb instance name
*/}}
{{- define "couchdb.serviceAccount" -}}
{{- if .Values.serviceAccount.name -}}
{{- .Values.serviceAccount.name }}
{{- else -}}
{{- template "couchdb.fullname" . -}}
{{- end -}}
{{- end -}}

{{/*
Fail if couchdbConfig.couchdb.uuid is undefined
*/}}
{{- define "couchdb.uuid" -}}
{{- required "A value for couchdbConfig.couchdb.uuid must be set" (.Values.couchdbConfig.couchdb | default dict).uuid -}}
{{- end -}}

{{/*
Repurpose volume claim metadata whether using the new volume claim template
or existing volume claims.
*/}}
{{- define "persistentVolume.metadata" -}}
{{- $context := index . "context" -}}
{{- $claim := index . "claim" -}}
name: {{ $claim.claimName | default "database-storage" }}
labels:
  app: {{ template "couchdb.name" $context }}
  release: {{ $context.Release.Name }}
{{- with $context.Values.persistentVolume.annotations }}
annotations:
  {{- toYaml . | nindent 6 }}
{{- end }}
{{- end -}}

{{/*
Repurpose volume claim spec whether using the new volume claim template
or an existing volume claim.
*/}}
{{- define "persistentVolume.spec" -}}
{{- $context := index . "context" -}}
{{- $claim := index . "claim" -}}
accessModes:
{{- range $context.Values.persistentVolume.accessModes }}
- {{ . | quote }}
{{- end }}
resources:
  requests:
    storage: {{ $context.Values.persistentVolume.size | quote }}
{{- if $context.Values.persistentVolume.storageClass }}
{{- if (eq "-" $context.Values.persistentVolume.storageClass) }}
storageClassName: ""
{{- else }}
storageClassName: "{{ $context.Values.persistentVolume.storageClass }}"
{{- end }}
{{- end }}
{{- if $claim.persistentVolumeName }}
volumeName: {{ $claim.persistentVolumeName }}
{{- end }}
{{- end -}}