DevOps Daily Newsletter - Week 29, 2026

Hope your week is off to a good start - here's the latest from DevOps Daily to kick things off.

Blog Posts

Stop Prompting, Start Looping: Agentic Loops Explained

The best engineers stopped hand-writing prompts and started writing loops. This one breaks down what an agentic loop actually is and why it changes how you work with coding agents.

The Docker AuthZ Bypass Is Back: CVE-2026-34040

A crafted API request can slip right past Docker authorization plugins, and the fix history here is messier than you'd hope. If you run authz plugins in production, read this before someone else does.

PostgreSQL 18.2 Broke Standbys: The 18.x Upgrade Footguns

PostgreSQL 18.2 shipped regressions bad enough to force an emergency 18.3, including halted standbys. Here's what broke and how to upgrade without getting burned.

Presigned-URL Uploads From a Serverless Function

Streaming uploads through your API means every byte crosses your server twice, which serverless functions really don't appreciate. Presigned URLs let clients upload straight to storage instead.

Object Storage That Branches With Your Database

Database branching gives you a throwaway copy of your rows, but your files normally stay in one shared bucket. On Neon a branch forks the bucket too, so each branch gets its own copy of the files.

The Everything-on-Your-Branch Architecture

For a decade "branch the database" meant a copy of the schema and rows. Neon now forks all of it on one branch: Postgres, object storage, functions, and the AI gateway, together and isolated.

Realtime Without a WebSocket Service

Live counters, presence, and notifications usually mean adding a websocket service to run and pay for. If your data already lives in Postgres, LISTEN/NOTIFY plus SSE on a Neon Function gives you realtime fan-out without one.

News Digests

DevOps Weekly Digest - Week 28, 2026

Curated updates from Kubernetes, cloud native tooling, CI/CD, IaC, observability, and security. Everything worth knowing from week 28, minus the noise.

Comparisons

DynamoDB vs MongoDB

DynamoDB and MongoDB both call themselves NoSQL, but they behave very differently once real workloads hit. We compare data modeling, scaling, and pricing so you can pick with confidence.

S3 vs GCS vs Azure Blob Storage

S3, GCS, and Azure Blob Storage all store objects, but the details around pricing, durability, and tooling diverge fast. This side-by-side helps you figure out which one fits your stack.

Guides

Introduction to Packer

Learn to build automated machine images with HashiCorp Packer, from the basics all the way to multi-platform builds. A solid starting point if golden images are on your roadmap.

Quizzes

Jenkins CI/CD Pipeline Quiz

Think you know Jenkins? Test yourself on declarative and scripted pipelines, Groovy syntax, and agents.

Flashcards

Linux Fundamentals

Brush up on file system hierarchy, process management, permissions, and the commands you reach for every day. Quick reps to keep your Linux fundamentals sharp.

Featured Games

Agentic Loop Simulator

Watch a planner, a builder, and a judge cycle through an agentic loop one step at a time. A hands-on way to see how coding agents actually think.

Uptime Defender

Incidents are rolling in and your uptime is on the line. See how long you can keep your infrastructure alive in this fast-paced SRE game.

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Happy learning, The DevOps Daily Team