Why Helm simplifies deployments in Kubernetes - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to install a Helm chart named 'myapp'.

Kubernetes

helm [1] install myapp ./mychart

Drag options to blanks, or click blank then click option'

Aupdate

Bcreate

Cdelete

Dinstall

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'create' instead of 'install' will not deploy the app.

Using 'delete' removes apps, not installs them.

The install command is used to deploy a Helm chart to Kubernetes.

2fill in blank

medium

Complete the code to upgrade an existing Helm release named 'myapp'.

Kubernetes

helm [1] upgrade myapp ./mychart

Drag options to blanks, or click blank then click option'

Ainstall

Bupgrade

Crollback

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'install' again may cause errors if release exists.

Using 'rollback' reverts changes, not upgrades.

The upgrade command updates an existing Helm release with new chart changes.

3fill in blank

hard

Fix the error in the Helm command to list all releases.

Kubernetes

helm [1] --all-namespaces

Drag options to blanks, or click blank then click option'

Alist

Bshow

Cget

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'show' or 'get' does not list releases.

Using 'status' shows info for one release only.

The list command shows all Helm releases, and --all-namespaces includes all namespaces.

4fill in blank

hard

Fill both blanks to create a Helm values override file and apply it during install.

Kubernetes

helm install myapp ./mychart -f [1] --set [2]

Drag options to blanks, or click blank then click option'

Acustom-values.yaml

BreplicaCount=3

Cimage.tag=latest

Ddefault-values.yaml

Attempts:

3 left

💡 Hint

Common Mistakes

Using default-values.yaml may not reflect custom settings.

Setting image.tag=latest is valid but not the expected answer here.

The -f flag loads a values file like custom-values.yaml. The --set flag overrides specific values like replicaCount=3.

5fill in blank

hard

Fill all three blanks to define a Helm template snippet that creates a ConfigMap with a key and value.

Kubernetes

apiVersion: v1
kind: ConfigMap
metadata:
  name: [1]
data:
  [2]: [3]

Drag options to blanks, or click blank then click option'

Amy-config

BconfigKey

C"configValue"

Ddefault-config

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around the value causes YAML errors.

Using default-config as name is valid but not the expected answer.

The ConfigMap name is my-config. The data key is configKey with value "configValue" (quotes needed for string).

Practice

1. What is the main reason Helm simplifies Kubernetes deployments?

easy

A. It replaces Kubernetes with a simpler system

B. It packages all app parts together for easy install and update

C. It removes the need for containers

D. It automatically writes application code

Solution

1. Step 1: Understand Helm's packaging role

   Helm groups all parts of a Kubernetes app into one package called a chart.

2. Step 2: Recognize deployment benefits

   This packaging makes installing and updating apps easier and less error-prone.

3. Final Answer:

   It packages all app parts together for easy install and update -> Option B

4. Quick Check:

   Helm packages apps [OK]

Hint: Helm bundles app parts to simplify deployment [OK]

Common Mistakes:

• Thinking Helm replaces Kubernetes
• Believing Helm removes containers
• Assuming Helm writes app code

2. Which Helm command is used to install a packaged application chart?

easy

A. helm delete myapp

B. helm update myapp

C. helm create myapp

D. helm install myapp ./mychart

Solution

1. Step 1: Identify install command syntax

   The correct command to install a chart is helm install [release-name] [chart-path].

2. Step 2: Match options to syntax

   helm install myapp ./mychart matches this syntax with helm install myapp ./mychart.

3. Final Answer:

   helm install myapp ./mychart -> Option D

4. Quick Check:

   Install command = helm install [OK]

Hint: Install uses 'helm install' followed by name and chart [OK]

Common Mistakes:

• Using 'helm update' to install
• Confusing 'helm create' with install
• Using 'helm delete' to install

3. Given the command helm list, what output should you expect?

medium

A. A list of all Kubernetes pods running

B. The YAML configuration of the current release

C. A list of installed Helm releases with their status

D. An error saying command not found

Solution

1. Step 1: Understand 'helm list' purpose

   This command shows all Helm releases installed in the cluster with their status.

2. Step 2: Compare options to expected output

   This matches 'A list of installed Helm releases with their status'.

3. Final Answer:

   A list of installed Helm releases with their status -> Option C

4. Quick Check:

   helm list shows releases [OK]

Hint: 'helm list' shows installed releases and status [OK]

Common Mistakes:

• Confusing 'helm list' with pod listing
• Expecting YAML config output
• Assuming command causes error

4. You ran helm upgrade myapp ./mychart but got an error about missing chart. What is the likely fix?

medium

A. Check if the chart path './mychart' exists and is correct

B. Run 'helm delete myapp' before upgrade

C. Use 'kubectl upgrade' instead of helm

D. Restart the Kubernetes cluster

Solution

1. Step 1: Analyze error cause

   The error about missing chart usually means the path './mychart' is wrong or chart files are missing.

2. Step 2: Identify correct fix

   Verifying and correcting the chart path fixes the problem.

3. Final Answer:

   Check if the chart path './mychart' exists and is correct -> Option A

4. Quick Check:

   Missing chart error = check path [OK]

Hint: Verify chart path exists before upgrade [OK]

Common Mistakes:

• Deleting release unnecessarily
• Using kubectl instead of helm for upgrade
• Restarting cluster without cause

5. How does Helm's version tracking help when deploying updates to a Kubernetes app?

hard

A. It allows rolling back to previous working versions easily

B. It automatically fixes bugs in the app code

C. It prevents any changes to the app after first install

D. It deletes old versions permanently to save space

Solution

1. Step 1: Understand Helm version tracking

   Helm keeps track of each deployed version of an app release.

2. Step 2: Recognize rollback benefit

   This tracking allows users to revert to a previous version if the new update causes problems.

3. Final Answer:

   It allows rolling back to previous working versions easily -> Option A

4. Quick Check:

   Version tracking enables rollback [OK]

Hint: Version tracking lets you undo bad updates [OK]

Common Mistakes:

• Thinking Helm fixes app bugs automatically
• Believing app can't change after install
• Assuming old versions are deleted immediately