Helm _helpers.tpl

{{/*
Expand the name of the chart.
*/}}
{{- define "mychart.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
{{- end -}}

{{/*
A release-scoped full name, truncated to fit inside the 63-character
limit Kubernetes puts on most names (and keeps room for suffixes a
template might add on top).
*/}}
{{- define "mychart.fullname" -}}
{{- if .Values.fullnameOverride -}}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- $name := default .Chart.Name .Values.nameOverride -}}
{{- if contains $name .Release.Name -}}
{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- end -}}
{{- end -}}

{{/*
The standard set of labels every object in the chart should carry --
used both on metadata.labels and on a Deployment's selector, so the
two can never silently drift apart.
*/}}
{{- define "mychart.labels" -}}
app.kubernetes.io/name: {{ include "mychart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version }}
{{- end -}}

{{/*
Just the subset of labels a selector is allowed to use -- selectors
are immutable once a Deployment exists, so this deliberately excludes
version/chart labels that change on every upgrade.
*/}}
{{- define "mychart.selectorLabels" -}}
app.kubernetes.io/name: {{ include "mychart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
{{- end -}}