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Yoshik Karnawat
Yoshik Karnawat

SRE @PhonePe

Career

The Future of DevOps: Why AI Still Needs Infrastructure Engineers

Oct 27, 2026

•

6 min read

The Future of DevOps: Why AI Still Needs Infrastructure Engineers

AI infrastructure could be your next move as a DevOps or SRE engineer. AI can write the app. Running it reliably, scaling it, and keeping costs under control is still an engineering job.

Yoshik Karnawat
Yoshik Karnawat

Digest

#41 Uptime Sync: LiteLLM Compromised, Anthropic Moves Off Git, and VMs That Pause in Milliseconds

Oct 24, 2026

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2 min read

#41 Uptime Sync: LiteLLM Compromised, Anthropic Moves Off Git, and VMs That Pause in Milliseconds

A compromised certificate authority, practical cloud cost cuts, and six tools to monitor, access, and manage your infrastructure.

Yoshik Karnawat
Yoshik Karnawat

Kubernetes

How Kubernetes Networking Works: From a Service IP to Your Pod

Oct 21, 2026

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7 min read

How Kubernetes Networking Works: From a Service IP to Your Pod

Follow a request through Services, EndpointSlices, kube-proxy, and packet routing to understand how traffic actually reaches the right Pod.

Yoshik Karnawat
Yoshik Karnawat

Digest

#40 Uptime Sync: Moving Off RDS, Cutting AWS Costs, and Upgrading Postgres Without Downtime

Oct 18, 2026

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1 min read

#40 Uptime Sync: Moving Off RDS, Cutting AWS Costs, and Upgrading Postgres Without Downtime

A 500 GB database migration with a rollback path, Docker Hub’s security advisory, and ways to tighten Kubernetes permissions.

Yoshik Karnawat
Yoshik Karnawat

Career

18-Month SRE and Platform Engineer Learning Roadmap

Oct 15, 2026

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8 min read

18-Month SRE and Platform Engineer Learning Roadmap

The Practical Roadmap to SRE and Platform Engineering

Yoshik Karnawat
Yoshik Karnawat

System Design

Consistent Hashing vs Modulo Hashing: Key Remapping

Oct 13, 2026

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6 min read

Consistent Hashing vs Modulo Hashing: Key Remapping

How consistent hashing fixes the scaling problem, why virtual nodes matter, and what most system design explanations miss.

Yoshik Karnawat
Yoshik Karnawat

Digest

#39 Uptime Sync: Leaving the Cloud, Testing With Real Traffic, and Avoiding Kubernetes Throttling

Oct 10, 2026

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1 min read

#39 Uptime Sync: Leaving the Cloud, Testing With Real Traffic, and Avoiding Kubernetes Throttling

The migration stories, database lessons, security updates, and infrastructure changes that matter more than another tool launch

Yoshik Karnawat
Yoshik Karnawat

DevOps

How to Debug Production Issues: A Step-by-Step Method

Oct 5, 2026

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7 min read

How to Debug Production Issues: A Step-by-Step Method

Boring topic. Extremely useful skill. Read this.

Yoshik Karnawat
Yoshik Karnawat

Digest

#38 Uptime Sync: 100TB Saved, PostgreSQL Migration Traps, and AI Agent Security

Oct 2, 2026

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1 min read

#38 Uptime Sync: 100TB Saved, PostgreSQL Migration Traps, and AI Agent Security

From Cloudflare’s Rust memory optimisation to failed Postgres migrations, Kubernetes rollout debugging, and the DNS weakness behind an OpenAI jailbreak

Yoshik Karnawat
Yoshik Karnawat

Linux

Linux Memory Explained: Free vs Available, Cache & Swap

Sep 29, 2026

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6 min read

Linux Memory Explained: Free vs Available, Cache & Swap

A practical guide to free -m, page cache, reclaimable memory, swap, pressure, and container memory limits.

Yoshik Karnawat
Yoshik Karnawat

Digest

#37 Uptime Sync: AWS Outages, Postgres Replication, and Cutting Observability Costs

Sep 26, 2026

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1 min read

#37 Uptime Sync: AWS Outages, Postgres Replication, and Cutting Observability Costs

What a year of AWS failures reveals about multi-region architecture, why DuckDB 2.0 is faster, and how teams are reducing monitoring bills without losing visibility

Yoshik Karnawat
Yoshik Karnawat

Cloud

How to Choose a Cloud Region for Latency, Cost, and Recovery

Sep 22, 2026

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6 min read

How to Choose a Cloud Region for Latency, Cost, and Recovery

The closest region is not automatically the right region. The real question is whether your workload actually fits there.

Yoshik Karnawat
Yoshik Karnawat

Digest

#36 Uptime Sync: Growing Past Senior, Cutting Cloud Waste, and Preventing Production Incidents

Sep 20, 2026

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1 min read

#36 Uptime Sync: Growing Past Senior, Cutting Cloud Waste, and Preventing Production Incidents

Career progression, architecture trade-offs, 100 TB of saved RAM, and practical DevOps lessons for building safer and more efficient systems

Yoshik Karnawat
Yoshik Karnawat

Networking

How BGP Failover Reroutes Traffic After a Network Failure

Sep 14, 2026

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6 min read

How BGP Failover Reroutes Traffic After a Network Failure

BGP can move traffic to another path, but the result depends on failure detection, local policy, and whether the backup route is actually usable.

Yoshik Karnawat
Yoshik Karnawat

Digest

#35 Uptime Sync: Cloud Availability Risks, PostgreSQL 19, and AI Agent Safety

Sep 11, 2026

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1 min read

#35 Uptime Sync: Cloud Availability Risks, PostgreSQL 19, and AI Agent Safety

The hidden failure modes in cloud software, the infrastructure changes worth tracking now, and why human judgment still matters in AI-powered engineering

Yoshik Karnawat
Yoshik Karnawat

DevOps

DNS Changed but Users Reach the Old Service: How to Troubleshoot

Sep 8, 2026

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5 min read

DNS Changed but Users Reach the Old Service: How to Troubleshoot

The DNS record may be correct, but cached answers, internal DNS policies, or routing can still send users to the old destination.

Yoshik Karnawat
Yoshik Karnawat

Digest

#34 Uptime Sync: AI Outages, Buildkite Lessons, and the Cloud Costs Hiding in Plain Sight

Sep 5, 2026

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1 min read

#34 Uptime Sync: AI Outages, Buildkite Lessons, and the Cloud Costs Hiding in Plain Sight

From chatbot downtime and crawler traffic to inconsistent VM performance, safer recovery workflows, and practical GitOps tools

Yoshik Karnawat
Yoshik Karnawat

Digest

#33 Uptime Sync: PostgreSQL 18 Speed, AI Agent Risks, and Smarter Kubernetes Scaling

Aug 29, 2026

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1 min read

#33 Uptime Sync: PostgreSQL 18 Speed, AI Agent Risks, and Smarter Kubernetes Scaling

From UUID v7 inserts and Kubernetes FinOps to AI agents in CI/CD - cloud, database, and security lessons.

Yoshik Karnawat
Yoshik Karnawat

DevOps

Terraform vs OpenTofu: How to Choose for a New Project

Aug 24, 2026

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6 min read

Terraform vs OpenTofu: How to Choose for a New Project

How I'd Choose for a New Project

Yoshik Karnawat
Yoshik Karnawat

Digest

#32 Uptime Sync: PgBouncer, Kubernetes Health Checks, and the Production Mistakes That Take Services Down

Aug 22, 2026

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1 min read

#32 Uptime Sync: PgBouncer, Kubernetes Health Checks, and the Production Mistakes That Take Services Down

Database connections, broken probes, cloud-cost discipline, and practical DevOps lessons for engineers running real systems

Yoshik Karnawat
Yoshik Karnawat

Career

Which DevOps Certs Are Worth It in 2026

Aug 17, 2026

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5 min read

Which DevOps Certs Are Worth It in 2026

Certs Can Get You Interviews, but Skills Get You Hired

Yoshik Karnawat
Yoshik Karnawat

Digest

#31 Uptime Sync: P99 Breakthroughs, AI Agent Blind Spots, and Infrastructure at Massive Scale

Aug 15, 2026

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2 min read

#31 Uptime Sync: P99 Breakthroughs, AI Agent Blind Spots, and Infrastructure at Massive Scale

From a one-line Python fix to GPU networking, secure CI pipelines, and the observability gaps hiding inside AI agents

Yoshik Karnawat
Yoshik Karnawat

Networking

+1

AWS VPC Networking Explained: NAT Gateways and PrivateLink

Aug 10, 2026

•

8 min read

AWS VPC Networking Explained: NAT Gateways and PrivateLink

How Traffic Actually Moves From a VPC to NAT Gateway and PrivateLink

Yoshik Karnawat
Yoshik Karnawat

Digest

#30 Uptime Sync: AI Agents in Production, Telemetry Blind Spots, and the Scale Problems Nobody Sees

Aug 8, 2026

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2 min read

#30 Uptime Sync: AI Agents in Production, Telemetry Blind Spots, and the Scale Problems Nobody Sees

From OpenAI’s sandbox escape to Prometheus memory waste and million-event telemetry pipelines

Yoshik Karnawat
Yoshik Karnawat

Career

Why I Left a Large Company for a Startup

Aug 4, 2026

•

4 min read

Why I Left a Large Company for a Startup

PhonePe taught me how to operate critical infrastructure at scale. I left because I needed to learn how to build more of it myself.

Yoshik Karnawat
Yoshik Karnawat

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