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Debugging KubeVPN's DNS resolution failures

Nilesh D

Software Engineer @One2N

The other day, I was trying to access the Go documentation at go.dev, but the page wouldn't load. Not on Chrome, not in incognito mode, not even on Safari. The error was simple but frustrating: "Could not resolve hostname".

September 30, 2025 | 3 min read

What happens when you run Terraform commands?

Sahil Joseph

SRE @One2N

Saurabh Hirani

Principal SRE @One2N

Have you ever wondered what happens when you run Terraform commands? In this post, we will explore the following topics to gain a better understanding of Terraform internals: Architecture and provider plugin architecture, Credential management, State locking and Debugging

September 24, 2025 | 7 min read

Daily driving Omarchy and Hyprland as a CTO

Jaideep Khandelwal

Founder, CTO @One2N

A hands-on review of Omarchy Linux, an easy-to-install Arch-based Linux distro with Hyprland window manager pre-configured out of the box. Learn what works, what breaks, and who should use it.

September 16, 2025 | 5 min read

DORA Metrics: Useful or Fluff

Jaideep Khandelwal

Founder, CTO @One2N

In this post, we shed light on why following DORA metrics without context might cause more harm than good. We also show how leaders can use a practical, strategic approach to connect DORA metrics to meaningful business outcomes.

September 3, 2025 | 14 min read

A pragmatic guide to get started with OpenTelemetry

Spandan Ghosh

Content @One2N

A guide explaining OTEL, monitoring vs. observability, telemetry’s pillars, OTEL instrumentation, and seamless backend migration. Includes practical migration strategies and trade-offs for SREs adopting OTEL.

August 20, 2025 | 5 min read

How we solved a critical site-to-site VPN IP address conflict in AWS

Rishiraj Rathore

SRE @One2N

Spandan Ghosh

Content @One2N

How One2N solved a critical site-to-site VPN IP address conflict in AWS, including details on the problem, failed solutions, and the final parallel system approach that worked with automation.

July 15, 2025 | 7 min read

DARE to question your alerts?

Saurabh Hirani

Principal SRE @One2N

Alert fatigue is real and it's hurting your on-call teams. This post breaks down how to make alerting systems smarter through regular alert analysis. Learn how to turn noisy alerts into actionable insights that drive real resilience.

June 25, 2025 | 3 min read

Implementing secure error handling in Go for B2B SaaS applications

Mohit Kumar

Software Engineer

A centralized error handling library helped our team improve user experience and strengthen security in Go-based microservices by replacing leaky, inconsistent error messages with structured, user-friendly responses.

June 18, 2025 | 5 min read

Deploying a scalable NATS cluster part 1: core architecture and considerations

Barun Debnath

SRE @One2N

In this blog, we provide a detailed overview of the NATS architecture, key cluster design considerations, and best practices for deploying a scalable and reliable NATS messaging system. We cover topics like high availability, fault tolerance, message durability, and the infrastructure requirements.

June 4, 2025 | 5 min read

Optimizing MongoDB backup strategy: lessons from achieving a 1-Hour RPO

Mihir Bhagwat

SRE @One2N

Sanket Rajgiri

SRE @One2N

This post walks through how we implemented a disaster recovery solution for a MongoDB cluster running on Google Kubernetes Engine (GKE) using the MongoDB Community Operator

May 14, 2025 | 8 min read

Transforming alerting with GitOps - a journey in automating Elasticsearch alerts

Srivatsa RV

SRE @One2N

This blog tells you how to approach alerting from first principles while on the ELK Stack. We cover how to capture the right signals that a NOC team looks at, structure them as alert definitions and operationalize them relying on GitOps. This ensures teams can act on alerts confidently.

April 29, 2025 | 9 min read

GitHub runners fundamentals and self-hosted runner setup

Rajesh Jangid

SRE

This post is an introduction to Github runners, different ways in which they can be deployed, and a comparison between managed and self hosted runners.

April 10, 2025 | 5 min read

All software is assembled

Chinmay Naik

Founder, CEO @One2N

Learn why modern software development relies more on strategic assembly of third-party components over building them from scratch.

April 8, 2025 | 4 min read

Best practices for upgrading EKS clusters

Aashi Rathore

SRE @One2N

Upgrade your Amazon EKS clusters with confidence. Learn best practices to avoid common mistakes, prepare your cluster, and execute a smooth upgrade process for improved performance, security, and cost savings.

March 25, 2025 | 5 min read

How to port-forward from EC2 instances without the need for opening any SSH ports or creating Bastion hosts

Harsh Mishra

SRE @One2N

Learn how to port-forward from EC2 instances in private subnets without opening SSH ports or setting up bastion hosts. This AWS SSM Session Manager guide provides a secure, cost-effective, and simple solution for EC2 access and port forwarding.

March 10, 2025 | 5 min read

Gotchas to avoid when using AWS spot instances in production

Aashi Rathore

SRE @One2N

In this post, we’ll explore the fundamentals of spot instances, the risks associated with their use in production, and key strategies to ensure seamless operations.

February 24, 2025 | 4 min read

Accessing private EC2 Instances without keys or passwords

Adarsh Raj

SRE

We explore how to securely access private EC2 instances without SSH keys or passwords using AWS Systems Manager Session Manager, especially in large-scale environments.

December 3, 2024 | 7 min read

Using UTM and Vagrant to spin up dev environments on Apple Silicon Macs

Srivatsa RV

SRE @One2N

Learn how to set up a local development environment on M-series Macs using Vagrant and UTM, overcoming VirtualBox limitations and allowing for a seamless virtualization and containerization experience.

December 2, 2024 | 5 min read

AWS

Best Practices

CI/CD

Data Engineering

How To

MLOps

Observability

Performance Optimization

Resiliency

Security

SRE

Debugging KubeVPN's DNS resolution failures

Nilesh D

Software Engineer @One2N

The other day, I was trying to access the Go documentation at go.dev, but the page wouldn't load. Not on Chrome, not in incognito mode, not even on Safari. The error was simple but frustrating: "Could not resolve hostname".

September 30, 2025 | 3 min read

What happens when you run Terraform commands?

Sahil Joseph

SRE @One2N

Saurabh Hirani

Principal SRE @One2N

Have you ever wondered what happens when you run Terraform commands? In this post, we will explore the following topics to gain a better understanding of Terraform internals: Architecture and provider plugin architecture, Credential management, State locking and Debugging

September 24, 2025 | 7 min read

Daily driving Omarchy and Hyprland as a CTO

Jaideep Khandelwal

Founder, CTO @One2N

A hands-on review of Omarchy Linux, an easy-to-install Arch-based Linux distro with Hyprland window manager pre-configured out of the box. Learn what works, what breaks, and who should use it.

September 16, 2025 | 5 min read