Kubernetes Operators and Helm Charts Repository

Welcome to the Kubernetes Operators and Helm Charts Repository, a comprehensive project designed for seamless deployment and management of Kubernetes applications using Helm Charts and custom Operators.

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Repository Structure

kubernetes-operators-helm-charts/
├── charts/               # Helm chart definitions
│   └── myapp/            # Helm chart for `myapp`
│       ├── Chart.yaml    # Helm chart metadata
│       ├── values.yaml   # Default configuration values
│       └── templates/    # Kubernetes resource templates
├── operators/            # Kubernetes operator implementations
│   └── myapp-operator/   # Operator for `myapp`
│       ├── Dockerfile    # Operator container image definition
│       ├── Makefile      # Build and deployment commands
│       ├── config/       # Configuration for the operator
│       │   ├── crd/      # Custom Resource Definitions (CRDs)
│       │   └── samples/  # Sample CR instances
│       ├── api/          # Custom resource API definitions
│       │   └── v1alpha1/ # API version implementation
│       └── controllers/  # Reconciliation logic
├── examples/             # Examples of deployments and configurations
├── docs/                 # Documentation for setup, optimization, and troubleshooting
├── .gitignore            # Ignored files for Git
├── LICENSE               # Project license
└── README.md             # Overview and usage guide

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Getting Started

Prerequisites

Ensure the following tools are installed on your system:

• Kubernetes Cluster (Minikube, KIND, or cloud-based clusters)
• kubectl (CLI tool for Kubernetes)
• Helm (Package manager for Kubernetes)
• Operator SDK (CLI for building Kubernetes operators)

Clone the Repository

git clone <repository-url>
cd kubernetes-operators-helm-charts

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Helm Chart Deployment

Chart Overview

The Helm chart is located under charts/myapp/. It includes:

• Chart.yaml: Metadata for the chart.
• values.yaml: Default configuration values.
• templates/: Kubernetes resource templates (e.g., Deployment, Service).

Deploy the Helm Chart

1. Lint the chart:

   helm lint charts/myapp

2. Install the chart:

   helm install myapp charts/myapp

3. Verify the deployment:

   kubectl get all

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Operator Development

Operator Overview

The custom Kubernetes operator is located under operators/myapp-operator/ and includes:

• CRDs: Define the custom resources (config/crd/).
• Reconciliation Logic: Implemented in the controller (controllers/myapp_controller.go).
• Container Image: Defined in the Dockerfile.

Steps to Build and Deploy the Operator

1. Build the operator binary:

   cd operators/myapp-operator
   make build

2. Run the operator locally:

   make run

3. Deploy the operator to the cluster:

   make deploy

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Examples

The examples/ directory includes sample configurations for testing:

• sample_deployment.yaml: Basic Deployment example.
• hpa_example.yaml: Horizontal Pod Autoscaler configuration.
• vpa_example.yaml: Vertical Pod Autoscaler configuration.

To apply a sample configuration:

kubectl apply -f examples/sample_deployment.yaml

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Documentation

Refer to the docs/ directory for detailed guides:

• setup.md: Step-by-step setup instructions.
• optimization.md: Techniques to optimize deployments.
• troubleshooting.md: Common issues and solutions.

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Contributing

We welcome contributions! Follow these steps:

1. Fork the repository.
2. Create a feature branch.
3. Commit your changes.
4. Open a pull request.

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License

This project is licensed under the MIT License.

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Contact

For questions or support, reach out via GitHub Issues or contact the maintainer directly.