The Standard Fullname and Labels Helpers
Reading the conventional helpers helm create ships.
The Standard Fullname and Labels Helpers is a free Helm Academy lesson on CoddyKit — lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Helm Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Helpers You Get for Free
Every chart from helm create ships a _helpers.tpl full of ready-made partials. Knowing them saves you from reinventing names and labels.
The name Helper
The chart.name partial returns the chart's base name, allowing an override via values. It is the building block for the others.
{{- define "mychart.name" -}}
{{- default .Chart.Name .Values.nameOverride -}}
{{- end -}}The fullname Helper
The chart.fullname partial builds a unique resource name, usually the release name joined with the chart name, so installs never collide.
name: {{ include "mychart.fullname" . }}Why fullname Truncates
Kubernetes names cap at 63 characters. The fullname helper runs the result through trunc and trimSuffix to stay within that limit.
{{ ... | trunc 63 | trimSuffix "-" }}The chart Label Helper
The chart.chart partial returns a name plus version string for the helm.sh/chart label. It records which chart version produced a resource.
helm.sh/chart: {{ include "mychart.chart" . }}Common Labels
The chart.labels partial emits the full recommended label set: managed-by, the chart label, version, and the selector labels combined.
metadata:
labels:
{{- include "mychart.labels" . | nindent 4 }}Selector Labels Are Separate
The chart.selectorLabels partial holds only the immutable pair used to match pods. It stays stable so a Deployment selector never breaks.
app.kubernetes.io/name: {{ include "mychart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}Why Two Label Helpers
Full labels include version, which changes on upgrade. Selector labels must never change, so Helm keeps them in a separate, smaller partial.
The serviceAccountName Helper
The generated chart also defines chart.serviceAccountName, which picks the right account name based on whether one is being created.
serviceAccountName: {{ include "mychart.serviceAccountName" . }}Reuse, Do Not Rewrite
When you author manifests, call these standard helpers instead of hand-writing names and labels. You inherit Kubernetes best practices automatically.
Read Your _helpers.tpl
Open the file helm create generated and read each define. Understanding these few partials unlocks most charts you will ever meet.
Quick Check
Which helper should you reference in a Deployment's selector.matchLabels?
Recap: Standard Helpers
You met the fullname, labels, and selectorLabels helpers from helm create. Call them in your manifests for consistent, conventional output. 🏷️
Frequently asked questions
Is the “The Standard Fullname and Labels Helpers” lesson free?
Yes — the full text of “The Standard Fullname and Labels Helpers” is free to read here on the web, and the Helm Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Helm Academy course, upgrade to CoddyKit PRO.
What will I learn in “The Standard Fullname and Labels Helpers”?
Reading the conventional helpers helm create ships. You practise Helm Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Helm Academy?
No prior experience is required. Helm Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “The Standard Fullname and Labels Helpers” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Helm Academy lesson?
Yes. Every Helm Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Defining a Partial with define
- Inserting Partials with template and include
- The Standard Fullname and Labels Helpers
- Passing Scope into a Named Template