DevOps Daily Newsletter - Week 36, 2026

Happy Monday! Big week: we went deep on how Lakebase Postgres turns the WAL into the whole database (with a live branch-back-in-time demo), told the story of Discord's trillion-message migration, and fact-checked a viral Kubernetes 1.37 claim that turned out to be half true.

Blog Posts

WAL as the Source of Truth: What Lakebase Storage on S3 Means for You

Neon published a deep dive on the storage engine behind Lakebase Postgres, where the write-ahead log is the source of truth and S3 holds the data. Here's what that architecture means in practice.

How Discord Stores Trillions of Messages With a Tiny Team

Discord went from 12 database nodes to 177 and back down to 72 while message volume grew from billions to trillions. The story of how a tiny team pulled that off is full of lessons for anyone running stateful infrastructure.

Kubernetes 1.37 Really Can Flag Unused PVCs, but the Viral YAML Is Wrong

A YAML snippet claiming Kubernetes 1.37 adds an unusedSince field to PVC status is making the rounds, and it's wrong. The underlying feature is real though, and we dug into what actually shipped.

Email APIs With Hosted MCP Servers: Who Actually Ships One

Every email provider now claims AI-agent support, but there's a real dividing line between marketing and a hosted MCP server you can actually connect to. We checked who ships one.

Kubernetes 1.37 Garhwal: What Shipped and What Slipped

Kubernetes 1.37 landed on August 26 with 67 enhancements: 16 stable, 23 beta, 27 alpha. We went through the release to sort what shipped from what slipped.

WebSockets Are the Easy Part

Opening a WebSocket takes twenty lines. Reconnection, resume-from-cursor, presence, and fan-out are where the real work starts, and this post walks through all of it.

Terraform Variables, Loops, and Outputs: The Complete Guide

Declaring vs assigning variables, tfvars, loops, outputs - everything about moving values through Terraform, collected in one place so you can stop hunting through scattered docs.

Kubernetes Beyond the Basics: 7 Concepts That Take You From Junior to Mid-Level

You can write a Deployment and debug a CrashLoopBackOff, but the gap between junior and mid-level is a different set of concepts entirely. Here are the 7 that matter.

The Postmortem Nobody Reads, and the One They Do

Most incident write-ups are compliance artifacts: written once, filed, never opened again. This post looks at what separates the postmortem nobody reads from the one people actually learn from.

Why Your Kafka Bill Is Mostly Network

Run the numbers on a self-managed Kafka cluster and the biggest line item isn't brokers or disks, it's network. Here's where the money actually goes and what you can do about it.

Featured Games

Docker Terminal Simulator

Practice Docker commands in an interactive browser terminal. Work through images, containers, logs, and exec without touching your own machine.

DNS Resolution Simulator

Watch DNS resolution happen step by step in an interactive simulator. If the hierarchy of resolvers and nameservers has always been a bit fuzzy, this will fix that.

News Digests

DevOps Weekly Digest - Week 35, 2026

Your week 35 roundup: curated updates from Kubernetes, cloud native tooling, CI/CD, IaC, observability, and security, all in one quick read.

Comparisons

SMTPfast vs Resend

Two developer-first email APIs, side by side: pricing per volume, contacts and broadcasts, MCP support, and automation. If you're picking between SMTPfast and Resend, start here.

Guides

Introduction to CI/CD with GitHub Actions

Automate your development workflow with GitHub Actions, starting from basic builds and working up to more involved pipelines. A solid starting point if you're new to CI/CD.

Quizzes

Site Reliability Engineering (SRE) Quiz

Test yourself on SLOs, error budgets, toil reduction, and incident management. A quick way to find the gaps in your SRE knowledge.

Flashcards

CI/CD Concepts

Drill the fundamentals of continuous integration and deployment: pipeline stages, testing strategy, and more, in quick flashcard form.

Happy learning, The DevOps Daily Team