Kubernetes Container Orchestration Helm and Package Management 2 — Questions and Answers
Question 1: Which Helm command updates the local cache of available charts from configured repositories?
- helm repo sync
- helm repo update (Correct answer)
- helm cache refresh
- helm chart pull
Correct answer: helm repo update
`helm repo update` fetches the latest chart metadata from all configured repositories.
Question 2: What is the purpose of the `_helpers.tpl` file in a Helm chart?
- It stores default configuration values
- It defines reusable template snippets and named templates (Correct answer)
- It contains the chart dependency list
- It holds Kubernetes RBAC policies for the chart
Correct answer: It defines reusable template snippets and named templates
`_helpers.tpl` is a conventions file for defining reusable named templates that other templates can call with `{{ include }}`.
Question 3: How do you pass a custom values file when installing a Helm chart?
- helm install myapp ./chart --set-file values.yaml
- helm install myapp ./chart -f custom-values.yaml (Correct answer)
- helm install myapp ./chart --values-override custom-values.yaml
- helm install myapp ./chart --config custom-values.yaml
Correct answer: helm install myapp ./chart -f custom-values.yaml
The `-f` or `--values` flag specifies one or more custom values files to merge with the chart defaults.
Question 4: What does `helm lint` do?
- Formats the chart templates for consistency
- Validates the chart structure and templates for potential errors (Correct answer)
- Runs unit tests defined in the chart
- Checks if chart dependencies are up to date
Correct answer: Validates the chart structure and templates for potential errors
`helm lint` examines a chart for potential issues including template rendering errors and missing required fields.
Question 5: In Helm, what is a 'release'?
- A versioned snapshot of a chart stored in a repository
- A specific instance of a chart deployed to a Kubernetes cluster (Correct answer)
- A changelog entry describing updates between chart versions
- A signed artifact proving chart authenticity
Correct answer: A specific instance of a chart deployed to a Kubernetes cluster
A Helm release is a named, running instance of a chart deployed in a specific namespace with a specific configuration.
Question 6: Which command shows all Helm releases across all namespaces?
- helm list --all
- helm list -A (Correct answer)
- helm ls --global
- helm status --all-namespaces
Correct answer: helm list -A
`helm list -A` (or `--all-namespaces`) lists releases from every namespace in the cluster.
Question 7: What Helm built-in object provides access to the chart's metadata like name and version?
- .Release
- .Chart (Correct answer)
- .Values
- .Capabilities
Correct answer: .Chart
The `.Chart` object gives access to fields from `Chart.yaml` such as `.Chart.Name`, `.Chart.Version`, and `.Chart.AppVersion`.
Kubernetes Container Orchestration Helm and Package Management 2
Which Helm command updates the local cache of available charts from configured repositories?