MongoDB Kubernetes Operator Test Repository

This is a test repository for setting up and testing the MongoDB Kubernetes Operator in a local minikube environment. The repository contains Helm charts and automation scripts to deploy a complete MongoDB stack with certificate management and operations manager.

Prerequisites

Before using this repository, ensure you have the following tools installed:

Required Tools

• minikube - Local Kubernetes cluster for testing
• kubectl - Kubernetes command-line tool
• Helm (v3.x) - Kubernetes package manager
• Docker - Container runtime (required by minikube)

Optional Tools

• k9s - Terminal-based UI for Kubernetes clusters (recommended for monitoring)

Quick Start

1. Initialize Minikube Environment

Run the initialization script to set up your complete MongoDB Kubernetes environment:

chmod +x init-minikube.sh
./init-minikube.sh

2. Verify Installation

Check that all components are running:

# Check minikube status
minikube status

# Check all pods are running
kubectl get pods --all-namespaces

# Check MongoDB operator
kubectl get pods -n mongodb

What does init-minikube.sh do?

The init-minikube.sh script automates the complete setup of a MongoDB Kubernetes environment. Here's what it does step by step:

1. Minikube Setup

• Starts a local minikube cluster
• Enables the ingress addon for external access
• Enables the metrics-server addon for resource monitoring

2. MongoDB Kubernetes Operator

• Adds the official MongoDB Helm repository
• Installs the MongoDB Kubernetes Operator (v1.5.0) in the mongodb namespace
• This operator manages MongoDB deployments, replica sets, and sharded clusters

3. External DNS Configuration

• Installs External DNS (v1.19.0) with CoreDNS provider
• Enables automatic DNS record creation for ingress resources
• Deployed in the external-dns namespace

4. Certificate Management

• Installs cert-manager (v1.19.1) for automatic TLS certificate provisioning
• Installs trust-manager for certificate bundle management
• Both deployed in the cert-manager namespace with CRDs enabled

5. Custom Certificate Setup

• Deploys the ca-crt chart for Certificate Authority setup
• Installs the mongodb-crt chart for MongoDB-specific certificates
• Ensures proper TLS encryption for MongoDB connections

6. Operations Manager

• Deploys the ops-manager chart for MongoDB cluster management
• Provides a web interface for monitoring and managing MongoDB deployments

Repository Structure

├── init-minikube.sh          # Main initialization script
├── charts/                   # Helm charts directory
│   ├── ca-crt/              # Certificate Authority setup
│   ├── mongodb-crt/         # MongoDB certificate configuration
│   └── opsmanager/          # MongoDB Operations Manager
└── README.md                # This file

Usage Notes

• The script uses --wait flags to ensure each component is fully deployed before proceeding
• All MongoDB-related components are deployed in the mongodb namespace
• Certificate management components use the cert-manager namespace
• The setup includes both development certificates and production-ready certificate management

Cleanup

To remove the entire environment:

minikube delete

This will completely remove the minikube cluster and all deployed components.

Contributing

This is a test repository for MongoDB Kubernetes operator experimentation. Feel free to modify the charts and scripts to test different configurations.