Best Tools and Books for Helm Scripting to Buy in November 2025

1

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April Morning

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Before performing a helm install, you may need to run a script to configure certain aspects of your deployment. This script can be used to set up various dependencies or customizations required by your application or chart. Running a script before helm install ensures that all prerequisites are met, providing a smooth installation experience.

How to execute multiple scripts before helm install?

To execute multiple scripts before running helm install, you can create a shell script that executes all the necessary scripts in the desired order. Here's an example:

1. Create a new shell script file, for example, pre-install.sh.
2. Define the scripts you want to execute before helm install, separated by line breaks. For instance:

#!/bin/bash

Script 1

./script1.sh

Script 2

./script2.sh

Here, script1.sh and script2.sh are the scripts you want to execute before running helm install. 3. Save the file and make it executable. You can use the command chmod +x pre-install.sh to give it execution permissions. 4. Update your deployment process to run the pre-install.sh script before running helm install. You can do this in your CI/CD pipeline or directly from the command line.

Remember to adjust the file names and paths as per your requirements.

What is a script in the context of helm installation?

In the context of Helm installation, a script refers to a set of instructions or commands written in a specific programming language that is executed during the installation or deployment process.

These scripts are often used to facilitate the setup, configuration, or customization of a Helm chart. They can perform various tasks such as initializing database connections, generating configuration files, setting environment variables, creating resources in Kubernetes clusters, or running other command-line operations.

Helm provides two types of scripts that can be executed during installation:

1. Pre-installation scripts: These scripts are executed before the installation of the chart. They are useful for performing pre-requisites checks, configuring dependencies, or initializing resources required for the chart.
2. Post-installation scripts: These scripts are executed after the installation of the chart. They are commonly used for tasks like updating database schemas, starting background processes, or performing any additional configuration required post-installation.

By including scripts in the Helm chart, developers can automate complex installation processes, enhance configurability, and ensure consistency across deployments.

What are the best ways to test scripts before helm install?

There are several ways to test scripts before using helm install. Here are some best practices:

1. Linting: Use a linter tool like helm lint to check for common issues, such as formatting errors, missing required fields, or incorrect values. This helps catch simple mistakes early on.
2. Dry Run: Utilize the helm install --dry-run command to simulate the installation process without actually deploying the resources. It allows you to see the generated Kubernetes manifests and verifies whether the chart is well-formed.
3. Helm Template: Use helm template command to render the template files without applying any installation or runtime logic. This allows you to review the resulting YAML files and verify their correctness.
4. Local Testing: Set up a local Kubernetes cluster (e.g., minikube or kind) and use helm install on that cluster to validate the installation process. This helps identify any cluster-specific issues before deploying to a production environment.
5. Use Values Files: Helm allows you to specify values using --set or by providing a values file. By creating a dedicated test values file with specific test values, you can ensure that the chart installs correctly with the desired configuration.
6. Automated Tests: Write automated tests using frameworks like Helm Test or Kubernetes operations (KOps). These tests can validate the behavior of the deployed application, such as checking if the endpoints are accessible, services are running, or configuration settings are correctly applied.

By following these practices, you can ensure that your Helm charts are well-tested and minimize the risk of issues when deploying to a Kubernetes cluster.