♾ DevOps Real-time scenarios - 1 ♾

Scenario 1: Continuous Integration Pipeline Failure.

🔴 Issue: The continuous integration (CI) pipeline fails to build and test the application code after a recent commit.

🟢 Resolution:

✅ Identify the Issue: DevOps engineers first need to identify the root cause of the pipeline failure by examining the build logs and error messages.
✅ Rollback or Fix: Depending on the severity of the issue, they might choose to roll back the last commit or fix the issue directly.
✅ Update Tests: If the issue is related to failing tests, developers might need to update their tests to cover the recent changes.
✅ Modify Pipeline Configuration: If the pipeline failure is due to a misconfigured pipeline or missing dependencies, engineers should modify the pipeline configuration accordingly.
✅ Automated Tests: To prevent future regressions, engineers should focus on enhancing automated tests and adding more coverage.

---------------------------------------------

🔴 Scenario 2: Scalability and Performance.

Issue: The application experiences performance degradation and becomes slow during high-traffic periods.

🟢 Resolution:

✅ Performance Monitoring: DevOps teams should use monitoring tools to track application performance and identify the specific bottlenecks causing the slowdown.
✅ Load Testing: Conduct thorough load testing to simulate high-traffic situations and identify the breaking points of the application.
✅ Vertical or Horizontal Scaling: Depending on the bottleneck, teams might need to scale vertically (upgrading resources of existing servers) or horizontally (adding more servers to the cluster).
✅ Caching: Implement caching mechanisms to reduce the load on the database and improve response times.
✅ Database Optimization: Optimize database queries, indexing, and overall database design to enhance query performance.
✅ Content Delivery Network (CDN): Utilize a CDN to distribute content and reduce the load on the application servers.


🔵 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

If Kubernetes is your destination in 2025, Docker is the map.
Grasp container basics with Docker, and let Kubernetes guide their deployment at scale.

Explore these blogs for valuable insights into Docker ➡️➡️

➡️Docker Tutorial for Beginners – Introduction & Getting Started
https://lnkd.in/d_u5TrAi

➡️Docker Volumes – Guide with Examples
https://lnkd.in/demuuzHR

➡️What Is a Dockerfile And How To Build It – Best Practices
https://lnkd.in/dQdtVrix

➡️Docker Networking – Basics, Network Types & Examples
https://lnkd.in/dtu3HPiv

➡️Docker vs. Kubernetes: Container Solutions Comparison
https://lnkd.in/dp8sBGCN

➡️Docker Compose vs Kubernetes – Differences Explained
https://lnkd.in/dCm9cK82

➡️Docker Architecture Overview – Structure & Components
https://lnkd.in/dJRyY_gS

➡️How to Keep Docker Secrets Secure: Complete Guide
https://lnkd.in/dNMyqZ97

➡️Docker Cheat Sheet – 36 Docker CLI Commands
https://lnkd.in/d8f228S3

➡️21 Docker Security Best Practices: Daemon, Image, Containers
https://lnkd.in/dvcqCaai

➡️Docker ENTRYPOINT and CMD : Differences & Examples
https://lnkd.in/dXYS-mV8

➡️Docker Compose – What is It, Example & Tutorial
https://lnkd.in/d6cD5J4T

➡️How to Stop and Remove Docker Containers
https://lnkd.in/dJ5ufZsW

➡️Docker Ps Command – When to Use & Examples
https://lnkd.in/dB693Bgh

➡️What is Docker Init & When to Use It – Best Practices
https://lnkd.in/dFxwiPQS

➡️How to Expose a Docker Port – Tutorial & Examples
https://lnkd.in/dWYKFSMp

➡️Docker Compose vs Kubernetes – Differences Explained
https://lnkd.in/dCm9cK82

➡️Using Docker Cp Command to Copy Files in Containers [Examples]
https://lnkd.in/dbN6Ka-N

➡️How to Create a CI/CD Pipeline with Docker [Tutorial]
https://lnkd.in/dTnGUNpd

➡️How to List Docker Containers [All, Running, Stopped, and More]
https://lnkd.in/dF6NiU2J

➡️Docker Swarm vs. Kubernetes – Key Differences Explained
https://lnkd.in/dXHh8GnB

➡️How to Run Environment Variables in a Docker Container
https://lnkd.in/du3V4VFD

➡️Docker Compose Logs – Guide to Monitoring & Debugging
https://lnkd.in/dWEtipdN

➡️Top 12 Most Useful Docker Alternatives for 2025 [List]
https://lnkd.in/dTnGUNpd


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 Kubernetes Dashboard – Now Better Than Ever! 🎉

A powerful Kubernetes Dashboard with built-in health checks, Trivy scanning, and real-time pod monitoring – all in one place! No need for third-party tools!

➡️ What's New?
✅ Integrated health checks for system & pods
✅ Trivy Scanning for security vulnerabilities 🔍
✅ New UI with an enhanced frontend (CSS, JavaScript) 🎨
✅ Faster installation – reduced setup time ⏳
✅ Updated Kubernetes client for seamless integration 🔗
✅ Step-by-step installation guide 📖
✅ Works with any application architecture ⚙️

🔥 Try it now! → 📱 GitHub Repo: https://github.com/NotHarshhaa/kubernetes-dashboard

#Kubernetes #DevOps #ContainerSecurity #Cloud


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 Kubernetes Dashboard UI & Functionality Upgrade! ⭐️

Big update! We've revamped our Kubernetes Dashboard with a more modern UI and enhanced functionality:

✨ What's New?
✅ Improved dashboard structure for a cleaner look
✅ Enhanced styles for a better user experience
✅ Optimized app.js for faster data fetching & better event handling
✅ Added Health Check feature for real-time cluster status

🔗 Check out the latest updates on GitHub: https://github.com/NotHarshhaa/kubernetes-dashboard

⭐️ Try it out & let us know your thoughts! 🚀 #Kubernetes #DevOps #Dashboard #Upgrade


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

➡️ Big Update: Revamped README for Certified Kubernetes Administrator Repo! 🎉

We’ve given our README a complete makeover for a modern, detailed, and structured experience! 📖✨

✅ New Design & Better Structure
✅ Step-by-Step Setup Guide for smooth learning 🛠
✅ Essential Badges for quick insights 🏅
✅ Improved Navigation for seamless exploration 🚀
✅ More Clarity on Kubernetes, Helm, Operators, Prometheus & More 🔍

Whether you're preparing for the CKA exam or just diving into Kubernetes, this update will make your learning journey smoother!

📌 Check it out now: 📱 https://github.com/NotHarshhaa/Certified_Kubernetes_Administrator

⭐️ Give it a star if you find it useful! #Kubernetes #DevOps #CKA #Helm #Prometheus #OpenSource 🚀


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

👉 🆘 A comprehensive collection of essential DevOps tools for development, deployment, monitoring, and more. 🆘

🔗 Link: https://github.com/NotHarshhaa/devops-tools 🔗

We Explained Each and Every Tools with Detailed Manner with their official site links 🔫

=> Table of Contents
1. Development Environment Tools
2. Source Code Management
3. Build Tools
4. Continuous Integration Tools
5. Artifact Management Tools
6. Code Analysis Tools
7. Continuous Delivery & GitOps Tools
8. Infrastructure Provisioning Tools
9. Cloud Cost Management Tools
10. Configuration Management Tools
11. Secret Management Tools
12. Config/Service Discovery Tools
13. Containerization Tools
14. Container Orchestration Tools
15. Container Security Tools
16. Policy Management Tools
17. Service Mesh Tools
18. Logging Tools
19. Monitoring & Observability Tools
20. Visualization Tools
21. Internal Developer Platform Tools
22. API Tools
23. Collaboration Tools
24. Backups and Restoration Tools
25. Cloud Providers


✉️ 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!!

☁️ AWS Cloud All End-to-End Content 2025 ⚡️


➡️ This Includes:
- All AWS Content
- AWS Realtime scenarios
- All AWS Exercises with solutions
- No More AWS PDFs needed
- Easy to Learn from anywhere
- Detailed Explanation guide
- All AWS services for DevOps Engineer

🖥 Link : https://github.com/NotHarshhaa/into-the-devops/tree/master/topics/aws

📱 Follow me on GitHub : https://www.github.com/NotHarshhaa


📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

⭐️ Ansible End-to-End Content 2025


➡️ This Includes:
- All Ansible Content
- Realtime Ansible Scenarios
- Ansible Playbooks with Solutions
- No More PDFs Needed
- Easy to Learn from Anywhere
- Detailed Explanation Guide
- Ansible for DevOps Engineers

📌 Link: https://github.com/NotHarshhaa/into-the-devops/tree/master/topics/ansible

📱 Follow me on GitHub: https://www.github.com/NotHarshhaa


📱 Follow @prodevopsguy for more content around Cloud & DevOps!!! // Join for DevOps DOCs: @devopsdocs

Resolving merge conflicts in Git ☁️ can be done using a text editor and Git commands. Here are the steps:

1. Identify the Conflict:
When you encounter a merge conflict, Git will mark the conflicting lines in your files.
Open the conflicted file in your favorite text editor (e.g., Visual Studio Code).

2. Review the Conflict:
➡️Look for conflict markers in the file:

<<<<<<< HEAD: This shows the changes from the base or HEAD branch.
=======: Separates your changes from the other branch's changes.
>>>>>>> BRANCH-NAME: Displays the changes from the other branch.

Decide which changes to keep or modify.

3. Resolve the Conflict:
Edit the file to incorporate the desired changes.
Remove the conflict markers (<<<<<<<, =======, and >>>>>>>).
Save the file.

4. Stage the Changes:
Use the following command to stage the resolved changes:

git add FILENAME

5. Commit the Changes:
Create a new commit with the resolved conflict:

git commit -m "Resolved merge conflict"

That's it! You've successfully resolved the merge conflict. For more details, you can refer to the GitHub Docs or other resources[1]. Let me know if you need further assistance! 🚀

➡️Reference links: [1] [2] [3] [4] [5]


📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

📢 Kubernetes All End-to-End Content 2025

▶️ This Includes:
- All Kubernetes Content
- Kubernetes Realtime scenarios
- All Kubernetes Exercises with solutions
- No More AWS PDFs needed
- Easy to Learn from anywhere
- Detailed Explanation guide
- All Kubernetes Tricks & Techniques for DevOps guy
- Added Certified Kubernetes Administrator (CKA) Notes
- All Kubernetes Realtime examples included

📱 Link: https://github.com/NotHarshhaa/into-the-devops/tree/master/topics/kubernetes


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🔄 90% of DevOps engineers will fail to answer these AWS Interview Questions at various levels:

✅ Basic, Intermediate, and Advanced.


➡️ Basic and Intermediate AWS Interview questions:
- What is AWS?
- What is EC2?
- What is S3?
- What is IAM?
- What is VPC?
- What is a Security Group?
- What are Availability Zones (AZs)?
- What is the difference between S3 and EBS?
- What is Auto Scaling?
- Explain the difference between Instance Store and EBS.
- What is CloudFront?
- What is the difference between an Elastic Load Balancer (ELB) and a Classic Load Balancer (CLB)?
- What is the use of AWS Lambda?
- What is the difference between a public and private subnet in VPC?
- Explain the difference between RDS and DynamoDB.
- What is an S3 bucket policy?

➡️ Advanced AWS Interview Questions:
- How does AWS CloudFormation work, and how does it help in automation?
- What are the benefits of using AWS Organizations?
- How does Amazon Route 53 work?
- What is AWS Kinesis and how does it differ from AWS Lambda?
- Explain the concept of AWS Elastic Beanstalk.
- What are the different types of EBS volumes and their use cases?
- What is AWS Direct Connect, and how does it work?
- What is the Amazon Elastic File System (EFS) and its use cases?
- What are AWS Trusted Advisor and its key functions?
- Explain the AWS Well Architected Framework.


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 CI-CD EKS GitHub Actions Source Update! 🖥


We’ve made several key enhancements to our CI/CD pipeline, Kubernetes manifests, and Terraform configurations to improve efficiency, flexibility, and maintainability! 🔥

🆕 Recent Changes:
✅ Enhanced Docker setup with multi-stage builds, improved logging, and better test cases 🐳
✅ Fixed output variable references in GitHub Actions workflow 🤖
✅ Updated `.gitignore` to exclude Terraform, Kubernetes, logs, and editor files 📂
✅ Refactored Kubernetes manifests for Dev, Staging, and Prod environments 🏗
✅ Improved Terraform configurations for better maintainability & flexibility ⚙️
✅ Revamped README for a modern, structured, and detailed look

📱 Check out the repo: https://github.com/NotHarshhaa/CI-CD_EKS-GitHub_Actions

#DevOps #GitHubActions #Kubernetes #Terraform #CICD #AWS #EKS #Automation 🚀


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

📢 Ultimate DevOps Tools Cheatsheet Collection! 🛠

I've just published a comprehensive collection of DevOps Cheatsheets that cover a wide range of tools and topics to help you streamline your workflows and enhance your skills. Whether you're a beginner or looking to deepen your knowledge, these Cheatsheets have got you covered!

📚 What's Inside:
- Containerization: Docker, Kubernetes, Helm, Podman
- CI/CD: Jenkins, GitHub Actions, GitLab CI, CircleCI
- Monitoring: Prometheus, Grafana, ELK Stack, Nagios
- Security: Trivy, SonarQube, AquaSec, HashiCorp Vault
- Cloud: AWS, Azure, GCP, Terraform

➡️ 👥 Who Is This For?
- DevOps Engineers: Get quick access to the tools you use every day.
- Sysadmins: Simplify operations with easy-to-follow guides.
- Developers: Understand the infrastructure behind your applications.
- DevOps Newcomers: Learn the basics and avoid common pitfalls with our beginner-friendly Cheatsheets.

Explore detailed guides, from basic concepts to advanced techniques, and take your DevOps expertise to the next level! 🌟

☁️ Check it out here: DevOps Cheatsheet Repository

Feel free to dive in, contribute, and share your thoughts. Happy DevOps-ing! 🚀


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 Big Update: Terraform AWS EKS Deployment Improved! 🚀

We've made major improvements to our Terraform AWS EKS deployment repository to enhance scalability, security, and performance.

🔹 What’s Updated?
✅ EKS Module Enhancements – Improved cluster configuration, node group security, and IAM roles
✅ VPC Module Enhancements – Better subnet structure, IGW setup, and route table associations
✅ Kubernetes Deployment & Service – Fixed labels, improved resource allocation, and corrected selector issues
✅ Updated Outputs & Variables – Cleaned up and standardized variable definitions
✅ Provider Configuration Improved – Ensuring compatibility with Terraform best practices
✅ Refined `.gitignore` – Excluding unnecessary files for a cleaner repository

🖥 Check out the latest commit & code changes here: LINK
📱 GitHub Repo: https://github.com/NotHarshhaa/eks-cluster-terraform

📢 Stay tuned for more updates! Drop a ⭐️ on the repo if you find this useful! 🚀

#Terraform #AWS #EKS #Kubernetes #DevOps #Cloud #IaC


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

❤️‍🔥 Daily Useful Commands for DevOps ❤️‍🔥


#️⃣Linux Commands:

1️⃣ Check server uptime:

uptime

2️⃣ Check disk usage:

df -h

3️⃣ Check memory usage:

free -m

4️⃣ Check CPU usage:

top or htop

5️⃣ Check logs:

tail -f /var/log/syslog

6️⃣ Check network connections:

netstat -tulpn

7️⃣ Check running processes:

ps aux

8️⃣ Kill a process:

kill <pid>

9️⃣ Check file permissions:

ls -l

🔟 Change file permissions:

chmod <permissions> <file>

#️⃣Docker Commands:

1️⃣ List running containers:

docker ps

2️⃣ Start a container:

docker start <container_name>

3️⃣ Stop a container:

docker stop <container_name>

4️⃣ Remove a container:

docker rm <container_name>

5️⃣ List all containers:

docker ps -a

6️⃣ Pull an image:

docker pull <image_name>

7️⃣ Run a container:

docker run -d <image_name>

8️⃣ Exec into a container:

docker exec -it <container_name> /bin/bash

9️⃣ Check container logs:

docker logs <container_name>

🔟 Build a Docker image:

docker build -t <image_name> .

#️⃣Kubernetes Commands:

1️⃣ Get nodes:

kubectl get nodes

2️⃣ Get pods:

kubectl get pods

3️⃣ Get deployments:

kubectl get deployments

4️⃣ Get services:

kubectl get svc

5️⃣ Create a deployment:

kubectl create deployment <deployment_name> --image=<image_name>

6️⃣ Apply a configuration:

kubectl apply -f <config_file>

7️⃣ Get pod logs:

kubectl logs <pod_name>

8️⃣ Exec into a pod:

kubectl exec -it <pod_name> -- /bin/bash

9️⃣ Scale a deployment:

kubectl scale deployment <deployment_name> --replicas=<replica_count>

🔟 Delete a pod:

kubectl delete pod <pod_name>

#️⃣Git Commands:

1️⃣ Clone a repository:

git clone <repository_url>

2️⃣ Check repository status:

git status

3️⃣ Add changes:

git add <file_name>

4️⃣ Commit changes:

git commit -m "<commit_message>"

5️⃣ Push changes:

git push <remote_name> <branch_name>

6️⃣ Pull changes:

git pull <remote_name> <branch_name>

7️⃣ Check commit history:

git log

8️⃣ Create a new branch:

git branch <branch_name>

9️⃣ Switch to a branch:

git checkout <branch_name>

🔟 Merge a branch:

git merge <branch_name>

#️⃣AWS Commands:

1️⃣ List EC2 instances:

aws ec2 describe-instances

2️⃣ Create an EC2 instance:

aws ec2 run-instances --image-id <image_id> --instance-type <instance_type>

3️⃣ Start an EC2 instance:

aws ec2 start-instances --instance-ids <instance_id>

📍 Save this post for quick reference! 🔖
💬 Share with your DevOps community!

#DevOps #Linux #Docker #Kubernetes #Git #AWS #Cloud #Automation #ProDevOpsGuy


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚨 DevOps Interview Questions from My friend Recent Interview! 🚨

I recently my friend attended an interview for a DevOps Engineer role, and I wanted to share some of the key questions asked. If you’re preparing for DevOps interviews, these might help! 💡

✅ General & Git
🔹 Self-introduction.
🔹 Which area are you strongest in?
🔹 Deployment process related to Git.
🔹 Difference between git fetch, git rebase, and git merge.
🔹 How do you revert committed changes in Git?

✅ Linux & EC2
🔹 In which folder do you store files in a Linux-based EC2 instance?
🔹 How do you find a file inside an EC2 instance?
🔹 Disk management in EC2 (EBS Volume).
🔹 Difference between rsync, cp, and scp.
🔹 What should you do if you lose the .pem key for an EC2 instance?
🔹 How do you connect a public EC2 instance to a private server?
🔹 What would you do if disk usage reaches 100%?

✅ Kubernetes
🔹 Difference between Deployment and DaemonSet.
🔹 What happens if you delete a Pod but want to keep the data?
🔹 Difference between ConfigMap and Secrets.
🔹 Explain key Kubernetes components.
🔹 How do you schedule a Pod?
🔹 What are Node Affinity & Non-Affinity?
🔹 Difference between Pod Affinity & Pod Anti-Affinity.
🔹 Hard vs. Soft conditions in Pod Affinity/Anti-Affinity.
🔹 Explain HPA (Horizontal Pod Autoscaler) and VPA (Vertical Pod Autoscaler).
🔹 What conditions can be set in HPA?
🔹 What is Ingress in Kubernetes?
🔹 How would you debug a domain that isn’t reaching a Kubernetes service?
🔹 If a service is returning a 500 error, how would you troubleshoot it?
🔹 Explain Rolling Updates and restarts in Kubernetes.
🔹 When restarting using kubectl, will there be downtime?

✅ AWS & Cloud
🔹 How do you access an S3 bucket from Account A in Account B?
🔹 How do you connect an EC2 instance to an S3 bucket?

✅ Jenkins & CI/CD
🔹 Different types of pipelines in Jenkins.
🔹 How do you set up a daily job using a cron expression?
🔹 How do you run a second Jenkins job when one is already running?
🔹 How do you store credentials in a Jenkins pipeline?
🔹 If a Jenkins job fails, how do you debug it?
🔹 How do you trigger a job based on memory usage?
🔹 Can autoscaling be integrated with Jenkins?

✅ Docker & Containers
🔹 Key components of a Dockerfile.
🔹 Difference between CMD and ENTRYPOINT.
🔹 Difference between ARG and ENV in Dockerfile.
🔹 How do you create and remove a Docker image?
🔹 How do you expose a running container’s ports?
🔹 What are the different Kubernetes services?

💡 These were some of the real interview questions that one of my friend faced! If you’re preparing for a DevOps, AWS, or Kubernetes role, I hope this helps.

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

⭐️ 70 AWS interview questions ranging from beginner to advanced levels:


⭐️ Beginner Level
1. What is AWS?
2. What are the key services provided by AWS?
3. What is EC2 in AWS?
4. What is an S3 bucket?
5. Explain the difference between S3 and EBS.
6. What is IAM in AWS?
7. How does AWS VPC work?
8. What are Security Groups and how do they work?
9. What is an AWS region?
10. What are Availability Zones in AWS?
11. What is Auto Scaling?
12. What is Elastic Load Balancing?
13. What is Route 53?
14. Explain the difference between a public and private subnet.
15. What is CloudFormation?
16. What is AWS Lambda?
17. What is Amazon RDS?
18. How do you monitor AWS resources?
19. What is Amazon DynamoDB?
20. What is AWS Elastic Beanstalk?
21. What is Amazon CloudFront?
22. Explain Amazon SNS.
23. What is the difference between RDS and DynamoDB?
24. What are EIPs (Elastic IPs)?
25. How does AWS CloudTrail work?
26. What is Amazon CloudWatch?
27. What is the AWS Free Tier?
28. What is a NAT Gateway?
29. Explain the Shared Responsibility Model in AWS.
30. What are AWS Tags and why are they used?

⭐️ Intermediate Level
31. How do you secure data at rest and in transit in AWS?
32. Explain the difference between AWS S3 Standard and S3 Glacier.
33. How does AWS S3 versioning work?
34. What is AWS Elasticache?
35. Explain the concept of a bastion host.
36. How do you implement high availability in AWS?
37. What is AWS Direct Connect?
38. What are AWS Managed Services?
39. What is AWS Config?
40. How do you set up cross-region replication in S3?
41. Explain AWS KMS.
42. What is Amazon Redshift?
43. How does AWS handle data encryption?
44. What is Amazon EFS?
45. Explain AWS Elastic Transcoder.
46. What is AWS CodePipeline?
47. How do you implement disaster recovery in AWS?
48. What is AWS OpsWorks?
49. What is AWS Step Functions?
50. Explain the difference between Spot Instances and Reserved Instances.
51. What is Amazon SWF?
52. How do you secure an AWS API Gateway?
53. What are Placement Groups in AWS?
54. What is AWS CodeDeploy?
55. How does Amazon Athena work?
56. What is AWS Snowball?
57. Explain the concept of AWS CloudHSM.
58. What is AWS X-Ray?
59. How do you manage secrets in AWS?
60. Explain AWS Systems Manager.

⭐️ Advanced Level
61. What is the difference between horizontal and vertical scaling in AWS?
62. How does AWS Lambda handle cold starts?
63. What is a VPC peering connection and how does it work?
64. Explain the use of AWS Transit Gateway.
65. What is Amazon EKS?
66. How do you manage multi-account AWS environments?
67. Explain the concept of serverless architecture in AWS.
68. What are AWS Organizations?
69. How do you optimize costs in AWS?
70. What are the best practices for securing an AWS environment?


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🔖 I call it 'DevOps Day 0' Roadmap 👇


⚡️Linux: File Systems, Package Management, Systemd, Permissions, Logs, Disk and Process Management

⚡️Networking: TCP/IP, DNS, HTTP/S, VPN, Load Balancers, Firewalls, Network Protocols, Subnetting

⚡️Database: SQL vs. NoSQL, ACID Properties, Scalability, Data Modeling

⚡️Security: Encryption, Authentication, Authorization, OWASP Top 10, Security Policies, Risk Assessment, Compliance Standards (like GDPR, HIPAA).

⚡️Storage: Block Storage, Object Storage, File Storage, NAS, SAN, SSD vs. HDD.

⚡️Cache: In-memory Caches (Redis, Memcached), CDN, Cache Invalidation, Write-through vs. Write-back Cache, Cache Hit Ratio.

⚡️DR: Backup and Restore, Pilot Light, Warm Standby, Multi-site, RTO (Recovery Time Objective), RPO (Recovery Point Objective).

DevOps is 20% building, 80% optimizing and operating.

Get the 'Day 0' basics right before jumping into tools.

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 𝟲 𝗙𝗥𝗘𝗘 𝗘𝗻𝗱-𝗧𝗼-𝗘𝗻𝗱 𝗗𝗲𝘃𝗢𝗽𝘀 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗼𝗻 𝗬𝗼𝘂𝘁𝘂𝗯𝗲 (𝟮𝗠+ 𝗩𝗶𝗲𝘄𝘀) 😳
Kick-start your career in DevOps with these hands-on projects! You’ll gain more knowledge than any paid course – 𝗳𝗼𝗿 𝗙𝗥𝗘𝗘!

Spend your weekend mastering DevOps with these amazing projects 👇

1️⃣𝗩𝗶𝗱𝗲𝗼 𝘁𝗼 𝗔𝘂𝗱𝗶𝗼 𝗣𝘆𝘁𝗵𝗼𝗻 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗔𝗽𝗽 𝗼𝗻 𝗞𝘂𝗯𝗲𝗿𝗻𝗲𝘁𝗲𝘀
🔗 https://lnkd.in/dpVThbJ7
✅ Develop a microservices application in Python
✅ Convert video files to audio using Flask
✅ Deploy on Kubernetes using Helm Charts
✅ Integrate MongoDB, PostgreSQL, RabbitMQ, and Docker

2️⃣𝗗𝗲𝘃𝗢𝗽𝘀 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗳𝗿𝗼𝗺 𝗦𝗰𝗿𝗮𝘁𝗰𝗵 𝗼𝗻 𝗔𝗪𝗦
🔗 https://lnkd.in/dyxNHkWS
✅ Build a DevOps project from the ground up
✅ Utilize AWS and Python
✅ Implement Docker for containerization
✅ Gain hands-on experience with essential DevOps tools

3️⃣𝗗𝗲𝘃𝗦𝗲𝗰𝗢𝗽𝘀 𝗣𝗶𝗽𝗲𝗹𝗶𝗻𝗲: 𝗗𝗲𝗽𝗹𝗼𝘆 𝗡𝗲𝘁𝗳𝗹𝗶𝘅 𝗖𝗹𝗼𝗻𝗲 𝗼𝗻 𝗞𝘂𝗯𝗲𝗿𝗻𝗲𝘁𝗲𝘀
🔗 https://lnkd.in/d_YnKBiA
✅ Build a DevSecOps pipeline
✅ Deploy a Netflix clone application
✅ Utilize Kubernetes for orchestration
✅ Implement security best practices

4️⃣𝗠𝗮𝗻𝗮𝗴𝗲 𝗦𝗽𝗼𝘁𝗶𝗳𝘆 𝗨𝘀𝗶𝗻𝗴 𝗧𝗲𝗿𝗿𝗮𝗳𝗼𝗿𝗺
🔗 https://lnkd.in/dFa7uiYP
✅ Automate Spotify playlist management
✅ Leverage Terraform for Infrastructure as Code
✅ Understand API integrations
✅ Enhance scripting skills

5️⃣𝗢𝗯𝘀𝗲𝗿𝘃𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝘄𝗶𝘁𝗵 𝗢𝗽𝗲𝗻𝗧𝗲𝗹𝗲𝗺𝗲𝘁𝗿𝘆: 𝗗𝗲𝗺𝗼 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻
🔗 https://lnkd.in/dXDCYCyc
✅ Implement observability in applications
✅ Use OpenTelemetry for tracing
✅ Monitor and analyze application performance
✅ Gain insights into system behavior and health

6️⃣𝗦𝗶𝗺𝗽𝗹𝗲 𝗗𝗲𝘃𝗢𝗽𝘀 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲 𝗧𝗲𝗿𝗿𝗮𝗳𝗼𝗿𝗺 𝘄𝗶𝘁𝗵 𝗔𝗪𝗦
🔗 https://lnkd.in/dJnD3S32
✅ Practice Terraform with AWS
✅ Understand Infrastructure as Code principles
✅ Deploy resources on AWS using Terraform
✅ Strengthen your automation skills

📌 More FREE projects on Cloud Champ YouTube Channel!

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

🚀 Domain Update Alert! 🚀

We've made some important domain changes to enhance accessibility and improve your learning experience. Here’s what’s new:

🔹 Main Site → prodevopsguy.tech ➡️ prodevopsguytech.com
⚠️ All key information about Pro DevOps Guy is now hosted here with improved accessibility and structure.

🔹 Blogs → blog.prodevopsguy.xyz ➡️ blog.prodevopsguytech.com
⚠️ Your go-to destination for insightful posts on DevOps, automation, and more!

🔹 Cloud Blogs → cloud.prodevopsguy.xyz ➡️ cloud.prodevopsguytech.com
⚠️ Explore in-depth articles and guides focused on cloud technologies to boost your expertise.

🔹 Docs → docs.prodevopsguy.xyz ➡️ docs.prodevopsguytech.com
⚠️ Find all the essential documents, guides, and resources in one streamlined location.


✨ New Addition! ✨
📌 DevOps & Cloud Repos Hub → repos.prodevopsguytech.com
⚠️ A dedicated space for all the critical DevOps and Cloud repositories—perfect for anyone eager to learn, implement, and grow in the DevOps world.

Update your bookmarks and keep learning DevOps & Cloud seamlessly! 🔥

#ProDevOpsGuy #DevOps #Cloud #TechUpdate #Learning


📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs