Summary - Helm

Combine install, values and upgrade to manage a chart.

Summary: Helm

In this group:

Helm is Kubernetes's package manager: chart (package), release (installed instance), repo (repository).
Chart: Chart.yaml (version, appVersion), values.yaml, Go-templated templates/.
helm install (-n, --create-namespace, --version, --wait), template, lint.
Values: values.yaml < -f < --set; helm get/show values.
upgrade --install, history, rollback, --atomic, uninstall.

helm upgrade --install magaza ./magaza -n magaza -f prod-values.yaml --atomic
helm rollback magaza 1 -n magaza

Exercise Write a template

Write a Helm Service template: apiVersion: v1, kind: Service; name {{ .Release.Name }}-web; type: {{ .Values.service.type }}; selector app: {{ .Release.Name }}-web; port port: {{ .Values.service.port }}.

Show example solution

# templates/service.yaml
apiVersion: v1
kind: Service
metadata:
  name: {{ .Release.Name }}-web
spec:
  type: {{ .Values.service.type }}
  selector:
    app: {{ .Release.Name }}-web
  ports:
    - port: {{ .Values.service.port }}

Test yourself

Which shows what a chart will produce without connecting to the cluster at all?
- helm history
- helm status
- helm template
- helm install
Show answer

helm template — helm install --dry-run talks to the cluster; helm template doesn't.

Uninstall the release.

helm ____ magaza -n magaza

Show answer

helm uninstall magaza -n magaza

Match.

install

Install
upgrade

Upgrade
rollback

Roll back
uninstall

Uninstall

Next lesson: What is a StatefulSet?

We Are Enhancing Your Experience

Cookie Preferences

Strictly Necessary Cookies

Analytical Cookies