helm install
- Docker & Kubernetes course
- Advanced
- Lesson 9/70
- 4 min
Learn to install a chart with helm install.
helm install
helm install RELEASE CHART renders the templates with the values and applies the resulting YAMLs to the cluster. The chart can come from a repository, a local folder or a .tgz package:
helm install magaza ./magaza -n magaza --create-namespace
helm install cache bitnami/redis --version 20.2.1
helm install magaza ./magaza --dry-run --debug # only show--wait waits until all resources are ready; it's used on CI to catch a failed installation.
See the template first
helm template renders the templates without connecting to the cluster at all and prints the resulting YAML. It's used to see what a chart will produce and to feed GitOps tools; helm lint checks the chart for errors:
helm lint ./magaza
helm template magaza ./magaza --set replicaCount=3 | kubectl apply --dry-run=server -f -Practice Install the chart
Write three commands: lint the ./magaza chart; render the templates locally with the release name magaza; install ./magaza with the release name magaza into the magaza namespace (creating it if missing) and wait until ready.
Starter code
# buraya yazSample solution
helm lint ./magaza
helm template magaza ./magaza
helm install magaza ./magaza -n magaza --create-namespace --waitExpected output
==> Linting ./magaza 1 chart(s) linted, 0 chart(s) failed --- # Source: magaza/templates/deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: magaza-web NAME: magaza NAMESPACE: magaza STATUS: deployed REVISION: 1
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 What does helm install ... --version 20.2.1 pin?
- The Kubernetes version
- The chart version Correct answer
- The application (image) version
- The Helm version
Explanation: For a reproducible installation, the chart version is always pinned.
2 Create the namespace if it doesn't exist.
helm install magaza ./magaza -n magaza ____helm install magaza ./magaza -n magaza --create-namespaceExplanation: Helm creates the namespace itself.
3 Match.
| Term | Meaning |
|---|---|
helm install |
Install |
--dry-run |
Show without applying |
helm template |
Render locally |
helm lint |
Check the chart |