🌟 KodeKloud Kubernetes Solutions

📌 Project Overview

This repository contains solutions for Kubernetes lab tasks from KodeKloud, organized by difficulty levels (Level 1 to Level 4). Each task is documented in a detailed Markdown file with step-by-step instructions, YAML manifests, verification commands, troubleshooting tips, and production notes. These solutions are designed to assist the Nautilus DevOps team in deploying and managing Kubernetes resources efficiently. It is important to note that when starting any Kubernetes task, users are already logged into the Jump Host by default as the thor user. Therefore, the SSH command to connect again is for educational purposes. This repository serves as a comprehensive record of my learning experience through the KodeKloud Engineer challenge, showcasing real-world tasks and projects designed to build practical DevOps Kubernetes expertise. The tasks documented here reflect the specific challenges I encountered during the challenge, including detailed solutions and verification steps. Note: While the core objectives and challenges remain consistent, the specific values (e.g., server names, file paths, or other parameters) in these tasks may differ from those you encounter in your own environment. However, the underlying concepts and problem-solving approaches remain applicable, enabling you to adapt the solutions to your specific context.

🔍 Purpose: Provide clear, executable solutions for Kubernetes labs, ensuring best practices and alignment with task requirements.

🛠️ Tools Used:

• Kubernetes: Managed via kubectl on the jump host.
• Images: Official images (e.g., nginx:latest, debian:latest, jenkins/jenkins).
• Environment: KodeKloud lab environment with pre-configured kubectl.

📂 Repository Structure:

kodekloud-kubernetes-solutions/
├── level-1/
│   ├── Task-01-VolumeShareDevops.md
│   ├── Task-02-WebserverPod.md
│   ├── Task-03-NginxDeployment.md
│   ├── Task-04-PodResourceLimits.md
│   ├── Task-05-HttpdDeploymentRollback.md
│   ├── Task-06-JenkinsDeployment.md
│   ├── Task-07-GrafanaDeployment.md
│   ├── Task-08-TomcatDeployment.md
│   ├── Task-09-NodeDeployment.md
│   ├── Task-10-TimeCheckPod.md
│   ├── Task-11-SidecarFix.md
│   ├── Task-12-UpdateDeploymentService.md
│   ├── Task-13-ReplicationController.md
│   ├── Task-14-NginxPHPFPMFix.md
├── level-2/
│   ├── Task-01-VolumeShareDevops.md
│   ├── Task-02-WebserverPod.md
│   ├── Task-03-NginxDeployment.md
│   ├── Task-04-PrintEnvarsGreeting.md
│   ├── Task-05-HttpdDeploymentRollback.md
│   ├── Task-06-JenkinsDeployment.md
│   ├── Task-07-GrafanaDeployment.md
│   ├── Task-08-TomcatDeployment.md
│   ├── Task-09-NodeDeployment.md
│   ├── Task-10-TroubleshootDeployment.md
│   ├── Task-11-LAMPEnvironmentFix.md
├── level-3/
│   ├── Task-01-PythonAppFix.md
│   ├── Task-02-LAMPStackDeployment.md
│   ├── Task-03-InitContainers.md
│   ├── Task-04-PersistentVolumes.md
│   ├── Task-05-ManageSecrets.md
│   ├── Task-06-EnvironmentVariables.md
│   ├── Task-07-LEMPSetup.md
│   ├── Task-08-KubernetesTroubleshooting.md
│   ├── Task-09-IronGalleryDeployment.md
│   ├── Task-10-PythonAppFix.md
├── level-4/
│   ├── Task-01-RedisDeployment.md
│   ├── Task-02-MySQLDeployment.md
│   ├── Task-03-NginxPHPFPMSetup.md
│   ├── Task-04-DrupalAppDeployment.md
│   ├── Task-05-GuestBookAppDeployment.md
├── commands-reference/
│   └── Kubernetes-Commands-Cheatsheet.md 
├── troubleshooting/
│   └── Common-Issues-Solutions.md 
└── README.md

---

🚀 Level 1 Tasks

Task #	Title/Link	Status	Difficulty	Description
1	Volume Share Devops	✅ Done	🟢 Basic	Create a pod with shared volume between two containers
2	Webserver Pod	✅ Done	🟢 Basic	Create a pod with nginx and sidecar logging container
3	Nginx Deployment	✅ Done	🟡 Intermediate	Deploy nginx with 3 replicas and NodePort service
4	Pod with Resource Limits	✅ Done	🟡 Intermediate	Set CPU and memory limits for an httpd pod
5	Httpd Deployment Rollback	✅ Done	🟡 Intermediate	Deploy httpd, update, and rollback with NodePort service
6	Jenkins Deployment	✅ Done	🟡 Intermediate	Deploy Jenkins with NodePort service
7	Grafana Deployment	✅ Done	🟡 Intermediate	Deploy Grafana with NodePort service
8	Tomcat Deployment	✅ Done	🟡 Intermediate	Deploy Tomcat with NodePort service
9	Node Deployment	✅ Done	🟡 Intermediate	Deploy Node app with 2 replicas and NodePort service
10	Time Check Pod	✅ Done	🟢 Basic	Create a pod to display time every 10 seconds
11	Sidecar Fix	✅ Done	🟡 Intermediate	Fix a sidecar container logging issue
12	Update Deployment Service	✅ Done	🟡 Intermediate	Update deployment and service for an application
13	Replication Controller	✅ Done	🟡 Intermediate	Create a replication controller for an application
14	Nginx PHP-FPM Fix	✅ Done	🟡 Intermediate	Fix an Nginx and PHP-FPM application deployment

---

🚀 Level 2 Tasks

Task #	Title/Link	Status	Difficulty	Description
1	Volume Share Devops	✅ Done	🟢 Basic	Create a pod with shared volume between two containers
2	Webserver Pod	✅ Done	🟢 Basic	Create a pod with nginx and sidecar logging container
3	Nginx Deployment	✅ Done	🟡 Intermediate	Deploy nginx with 3 replicas and NodePort service
4	Print Envars Greeting	✅ Done	🟢 Basic	Create a pod with environment variables and echo command
5	Httpd Deployment Rollback	✅ Done	🟡 Intermediate	Deploy httpd, update, and rollback with NodePort service
6	Jenkins Deployment	✅ Done	🟡 Intermediate	Deploy Jenkins with NodePort service
7	Grafana Deployment	✅ Done	🟡 Intermediate	Deploy Grafana with NodePort service
8	Tomcat Deployment	✅ Done	🟡 Intermediate	Deploy Tomcat with NodePort service
9	Node Deployment	✅ Done	🟡 Intermediate	Deploy Node app with 2 replicas and NodePort service
10	Troubleshoot Deployment	✅ Done	🟡 Intermediate	Fix issues in a Kubernetes deployment
11	LAMP Environment Fix	✅ Done	🟡 Intermediate	Fix issues in a LAMP stack deployment

---

🚀 Level 3 Tasks

Task #	Title/Link	Status	Difficulty	Description
1	Python App Fix	✅ Done	🟡 Intermediate	Fix a misconfigured Python application deployment
2	LAMP Stack Deployment	✅ Done	🟡 Intermediate	Deploy a LAMP stack with persistent storage
3	Init Containers	✅ Done	🟡 Intermediate	Configure init containers for pod initialization
4	Persistent Volumes	✅ Done	🟡 Intermediate	Configure persistent volumes for storage
5	Manage Secrets	✅ Done	🟡 Intermediate	Manage Kubernetes secrets for secure configuration
6	Environment Variables	✅ Done	🟢 Basic	Configure environment variables for pods
7	LEMP Setup	✅ Done	🟡 Intermediate	Deploy an LEMP stack with Nginx and PHP
8	Kubernetes Troubleshooting	✅ Done	🟡 Intermediate	Troubleshoot and resolve Kubernetes issues
9	Iron Gallery Deployment	✅ Done	🟡 Intermediate	Deploy Iron Gallery app with database
10	Python App Fix	✅ Done	🟡 Intermediate	Fix another misconfigured Python application deployment

---

🚀 Level 4 Tasks

Task #	Title/Link	Status	Difficulty	Description
1	Redis Deployment	✅ Done	🟠 Advanced	Deploy Redis master and slave with services
2	MySQL Deployment	✅ Done	🟠 Advanced	Deploy MySQL with persistent storage and service
3	Nginx PHP-FPM Setup	✅ Done	🟠 Advanced	Deploy Nginx and PHP-FPM with custom configuration
4	Drupal App Deployment	✅ Done	🟠 Advanced	Deploy Drupal with MySQL and persistent storage
5	Guest Book App Deployment	✅ Done	🟠 Advanced	Deploy guestbook app with Redis backend and frontend

---

💡 How to Use This Repository

1. Clone the Repository:

   git clone https://github.com/MiqdadProjects/kodekloud-kubernetes-solutions.git
   cd kodekloud-kubernetes-solutions

2. Navigate to Task Files:

   • Level 1 tasks: level-1/
   • Level 2 tasks: level-2/
   • Level 3 tasks: level-3/
   • Level 4 tasks: level-4/

3. Apply Solutions:

   • Copy the YAML manifests from each task’s Markdown file.
   • Run kubectl apply -f <file>.yaml to deploy resources.
   • Follow verification steps (e.g., kubectl get pods, kubectl logs) to ensure success.

4. Troubleshooting:

   • Refer to the "Troubleshooting Common Issues" section in each task file.
   • Use commands like kubectl describe pod or kubectl logs for debugging.
   • Check the troubleshooting/Common-Issues-Solutions.md file (TBD) for common fixes.

5. Test in Lab Environment:

   • Use the jump host (ssh thor@jumphost) with pre-configured kubectl.
   • Verify application accessibility via lab buttons (e.g., "App," "Jenkins," "Grafana").

---

🔧 Prerequisites

• Kubernetes Cluster: Access to a Kubernetes cluster via kubectl on the jump host.
• Text Editor: VS Code or similar for editing Markdown and YAML files.
• Git: For version control and repository management.
• Lab Environment: KodeKloud lab with pre-configured jump host.

---

📋 Detailed Setup Guide

1. Access the Jump Host:

   ssh thor@jumphost

2. Create and Edit YAML Files:

   vi <task-file>.yaml
   # Paste YAML content from the task’s Markdown file
   # Save with :wq

3. Apply Manifests:

   kubectl apply -f <task-file>.yaml

4. Verify Resources:

   kubectl get pods
   kubectl get svc
   kubectl get deployment
   kubectl logs <pod-name>
   curl http://<node-ip>:<node-port>

5. Test Application Access:

   • Use curl or the lab’s UI buttons (e.g., "App," "NodeApp") to verify accessibility.
   • Example: For Task 3 (Level 4), click the "App" button to check Nginx PHP-FPM on port 30012.

6. Debug Issues:

   • Check pod status: kubectl describe pod <pod-name>
   • View logs: kubectl logs <pod-name> -c <container-name>
   • Verify services: kubectl describe svc <service-name>

---

⚠️ Important Notes

• Filenames: Task files use the format Task-XX-DescriptiveName.md to avoid VS Code naming issues (e.g., resolved issue with Task-04-Pod-Resource-Limits.md by using Task-04-PodResourceLimits.md).
• Image Tags: Always use specified image tags (e.g., nginx:latest, httpd:2.4.27) to meet task requirements.
• Dry Runs: Test manifests with kubectl apply -f <file>.yaml --dry-run=client to validate syntax.
• Production Readiness: Each task includes production notes for real-world considerations.
• Level Completion: All tasks in Levels 1, 2, 3, and 4 are complete.

---

🚀 Contributing

Contributions are welcome! To add new tasks, improve solutions, or update documentation:

1. Fork the repository.
2. Create a new branch:

   git checkout -b task-XX

3. Add or update Markdown/YAML files in the appropriate level directory.
4. Commit changes:

   git commit -m "Add Task XX solution"

5. Push to the branch:

   git push origin task-XX

6. Open a pull request with a detailed description of changes.

---

📜 License

This project is licensed under the MIT License. See the LICENSE file for details.

---

📞 Contact

For questions, issues, or task details, contact the Nautilus DevOps team or open an issue in the repository.

Happy Kuberneting! 🚀