Add common labels/names helper

library/common/templates/lib/chart/_capabilities.tpl

+{{/*
+Return the appropriate apiVersion for DaemonSet objects.
+*/}}
+{{- define "common.capabilities.daemonset.apiVersion" -}}
+{{- print "apps/v1" -}}
+{{- end -}}
+
+{{/*
+Return the appropriate apiVersion for Deployment objects.
+*/}}
+{{- define "common.capabilities.deployment.apiVersion" -}}
+{{- print "apps/v1" -}}
+{{- end -}}
+
+{{/*
+Return the appropriate apiVersion for StatefulSet objects.
+*/}}
+{{- define "common.capabilities.statefulset.apiVersion" -}}
+{{- print "apps/v1" -}}
+{{- end -}}

library/common/templates/lib/chart/_labels.tpl

+{{/*
+Common labels shared across objects.
+*/}}
+{{- define "common.labels" -}}
+helm.sh/chart: {{ include "common.names.chart" . }}
+{{ include "common.labels.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels shared across objects.
+*/}}
+{{- define "common.labels.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "common.names.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}

library/common/templates/lib/chart/_names.tpl

+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "common.names.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).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "common.names.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 }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "common.names.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}