Helm Get Values Example: Access Kubernetes Secrets

In the realm of Kubernetes, understanding and manipulating values for ConfigMaps or Secrets is a fundamental task. The `helm get values` command is a powerful tool for achieving this. Let's delve into how you can use it to retrieve values from a Helm chart, along with example use cases.

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To get started, ensure you have Helm installed and initialized with a Kubernetes cluster. Also, make sure you have the desired chart installed in your namespace.

Basic Usage and Examples

The basic syntax for `helm get values` is as follows:

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helm get values --namespace

Replace with the name of your installed chart and with the namespace it's installed in.

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Displaying Values

The command above will display the current values used by the chart. Here's an example using the stable/redis chart:

helm get values redis --namespace my-namespace

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You'll see output similar to this:

Using Specific Keys

You can also fetch values using specific keys. Here's how:

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helm get values --namespace

For instance, to get only the 'Battery' value from the redis chart:

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helm get values redis Battery --namespace my-namespace

The output will be:

Comparing Values with Defaults

Sometimes, you might want to see how the used values differ from the default ones. The `helm get values` command can do this too.

Values and Defaults Side by Side

Use `helm get values --show-downloads` to display both the used and default values side by side like this:

helm get values redis --show-downloads --namespace my-namespace

The output will show both the current values and the ones the chart uses by default.

Values and Defaults in a Detailed Format

For a more detailed view, use the following command:

helm get values redis --all --output yaml --namespace my-namespace

This command will output the values in a detailed, YAML format, showing both the current and default values.

Understanding how to Retrieving values with `helm get values` is crucial for your day-to-day work with Helm. From displaying current values to comparing them with defaults, these examples illustrate the versatility of the command. Start incorporating them into your DevOps workflow today!