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Latest

Developer Posts and Tutorials

Queue or Log? Kafka, RabbitMQ and NATS All Do Both Now

"Do we need a queue or a log?" used to mean "RabbitMQ or Kafka?" That is no longer true. Apache Kafka 4.2, released in February, made share groups production ready. A sha...

DevOps Daily · 13 hours ago

Queue or Log? Kafka, RabbitMQ and NATS All Do Both Now

Queue or Log? Kafka, RabbitMQ and NATS All Do Both Now

"Do we need a queue or a log?" used to mean "RabbitMQ or Kafka?" That is no longer true. Apache Kafka 4.2, released in February, made share groups production ready. A sha...

DevOps Daily · 13 hours ago

Python 3.15 Made UTF-8 the Default. We Ran 13 Cases in Seven Linux Locales to See What Changes

Python 3.15.0 came out on October 9. The headline change for anyone who runs Python on servers is PEP 686: UTF-8 mode is now on by default. The What's New page says that open('flying-circus....

DevOps Daily · 13 hours ago

Python 3.15 Made UTF-8 the Default. We Ran 13 Cases in Seven Linux Locales to See What Changes

Python 3.15 Made UTF-8 the Default. We Ran 13 Cases in Seven Linux Locales to See What Changes

Python 3.15.0 came out on October 9. The headline change for anyone who runs Python on servers is PEP 686: UTF-8 mode is now on by default. The What's New page says that open('flying-circus....

DevOps Daily · 13 hours ago

Docker Desktop Switched New Containers to the local Log Driver. We Measured What That Changes

Docker Desktop 4.94.0 came out on October 5. One line in its release notes changes where your container logs go: "Changed the default logging driver for new Linux containers to local to...

DevOps Daily · 13 hours ago

Docker Desktop Switched New Containers to the local Log Driver. We Measured What That Changes

Docker Desktop Switched New Containers to the local Log Driver. We Measured What That Changes

Docker Desktop 4.94.0 came out on October 5. One line in its release notes changes where your container logs go: "Changed the default logging driver for new Linux containers to local to...

DevOps Daily · 13 hours ago

The YAML Norway problem and cron's day-of-month trap: two config formats that lie to you

Feed four innocent lines to PyYAML, Python's everyday YAML library: python3 -c 'import yaml; print(yaml.safe_lo...

DevOps Daily · 1 day ago

The YAML Norway problem and cron's day-of-month trap: two config formats that lie to you

The YAML Norway problem and cron's day-of-month trap: two config formats that lie to you

Feed four innocent lines to PyYAML, Python's everyday YAML library: python3 -c 'import yaml; print(yaml.safe_lo...

DevOps Daily · 1 day ago

A made a tool on a Weekend which is now everyones favorites

Let me ask you something, and you can be honest. When was the last time you created a Python virtual environment and then actually deleted it? Not deactivated it. Not closed the terminal and...

Pratik Pathak · 1 day ago

A made a tool on a Weekend which is now everyones favorites

A made a tool on a Weekend which is now everyones favorites

Let me ask you something, and you can be honest. When was the last time you created a Python virtual environment and then actually deleted it? Not deactivated it. Not closed the terminal and...

Pratik Pathak · 1 day ago

How to resolve merge conflicts in Git without guessing: markers, --ours/--theirs and the rebase flip

You are rebasing your branch onto main. Git stops on a conflict in limits.py. You want to keep your version, so you type git checkout --ours limits.py, stage it, continue and push. Your chan...

DevOps Daily · 2 days ago

How to resolve merge conflicts in Git without guessing: markers, --ours/--theirs and the rebase flip

How to resolve merge conflicts in Git without guessing: markers, --ours/--theirs and the rebase flip

You are rebasing your branch onto main. Git stops on a conflict in limits.py. You want to keep your version, so you type git checkout --ours limits.py, stage it, continue and push. Your chan...

DevOps Daily · 2 days ago

How Kubernetes Actually Schedules Your Pod (and What the Network Does After)

At some point kubectl apply stops being magic and becomes a question: something decided which node runs this pod, something wired its traffic, and I have no idea what either something did. Y...

DevOps Daily · 3 days ago

How Kubernetes Actually Schedules Your Pod (and What the Network Does After)

Hacktoberfest 2026 Stopped Counting PRs. Make Your First Ones Anyway, One a Day

Hacktoberfest started today, and if you have taken part before, the first thing to know is that the rule everyone remembers is gone. Pull requests no longer count toward Hacktoberfest reward...

DevOps Daily · 3 days ago

Hacktoberfest 2026 Stopped Counting PRs. Make Your First Ones Anyway, One a Day

Knowing What Your AI Feature Costs Before Finance Does

The invoice for your model provider arrives with one line per model. Finance reads it and asks a fair question: which feature spent that? If three features share one API key, the invoice can...

DevOps Daily · 3 days ago

Knowing What Your AI Feature Costs Before Finance Does

How Kubernetes Actually Schedules Your Pod (and What the Network Does After)

At some point kubectl apply stops being magic and becomes a question: something decided which node runs this pod, something wired its traffic, and I have no idea what either something did. Y...

DevOps Daily · 3 days ago

Knowing What Your AI Feature Costs Before Finance Does

The invoice for your model provider arrives with one line per model. Finance reads it and asks a fair question: which feature spent that? If three features share one API key, the invoice can...

DevOps Daily · 3 days ago

Hacktoberfest 2026 Stopped Counting PRs. Make Your First Ones Anyway, One a Day

Hacktoberfest started today, and if you have taken part before, the first thing to know is that the rule everyone remembers is gone. Pull requests no longer count toward Hacktoberfest reward...

DevOps Daily · 3 days ago

A Repo per Agent: What Cloudflare Artifacts Changes About Git

Most Git workflows assume that changes come from people, arrive at human speed, and get reviewed by other people. Coding agents break all three assumptions. A team that runs fifty agents in...

DevOps Daily · 3 days ago

A Repo per Agent: What Cloudflare Artifacts Changes About Git

We Took Down Our Mesh VPN Control Plane. Here Is What Kept Working

When you replace a VPN concentrator with a mesh VPN such as Tailscale, NetBird or ZeroTier, traffic stops flowing through one box. Devices connect to each other directly wherever the network...

DevOps Daily · 3 days ago

We Took Down Our Mesh VPN Control Plane. Here Is What Kept Working

A Repo per Agent: What Cloudflare Artifacts Changes About Git

Most Git workflows assume that changes come from people, arrive at human speed, and get reviewed by other people. Coding agents break all three assumptions. A team that runs fifty agents in...

DevOps Daily · 3 days ago

GITHUB_TOKEN Is Now 377 Characters Long. We Tested Which Redaction Rules Still Catch It

On October 2, GitHub finished the rollout of a new format for GitHub App installation tokens. By default, every newly minted ghs_ token, including the GITHUB_TOKEN that Actions gives each jo...

DevOps Daily · 3 days ago

GITHUB_TOKEN Is Now 377 Characters Long. We Tested Which Redaction Rules Still Catch It

CVE-2026-80521: The Ubuntu Container Escape Is Not Just an Ubuntu Problem

On September 22, DepthFirst published a working exploit for CVE-2026-80521 : an unprivileged process inside a default Docker or Kubernetes container gets a root shell on the host. Their expl...

DevOps Daily · 3 days ago

CVE-2026-80521: The Ubuntu Container Escape Is Not Just an Ubuntu Problem

CVE-2026-80521: The Ubuntu Container Escape Is Not Just an Ubuntu Problem

On September 22, DepthFirst published a working exploit for CVE-2026-80521 : an unprivileged process inside a default Docker or Kubernetes container gets a root shell on the host. Their expl...

DevOps Daily · 3 days ago

GITHUB_TOKEN Is Now 377 Characters Long. We Tested Which Redaction Rules Still Catch It

On October 2, GitHub finished the rollout of a new format for GitHub App installation tokens. By default, every newly minted ghs_ token, including the GITHUB_TOKEN that Actions gives each jo...

DevOps Daily · 3 days ago

We Took Down Our Mesh VPN Control Plane. Here Is What Kept Working

When you replace a VPN concentrator with a mesh VPN such as Tailscale, NetBird or ZeroTier, traffic stops flowing through one box. Devices connect to each other directly wherever the network...

DevOps Daily · 3 days ago

How Shopify Survives Black Friday: The Flash-Sale Playbook

Shopify merchants sold $14.6 billion over Black Friday Cyber Monday 2025, and the busiest minute, 12:01 p.m. EST on Black Friday, ran at $5.1 million in sales. A minute like that is not a su...

DevOps Daily · 3 days ago

How Shopify Survives Black Friday: The Flash-Sale Playbook

OpenTofu 1.13 Re-Encodes base64gzip and Drops WinRM. We Upgraded the Same State to See What Breaks

OpenTofu 1.13.0 was published on September 30 (the release announcement is dated September 29), and 1.13.1 followed on October 1 with two fixes for ephemeral values. The headline features ar...

DevOps Daily · 3 days ago

OpenTofu 1.13 Re-Encodes base64gzip and Drops WinRM. We Upgraded the Same State to See What Breaks

Touch Grass: 6 Project Ideas for People Who Live in a Terminal (Hacktoberfest DEV Challenge, Week 1)

The theme for Week 1 of the Hacktoberfest DEV Challenge is out, and it is a little personal for anyone in DevOps: Touch Grass. Build something with open-weight models or open-source AI that...

DevOps Daily · 3 days ago

Touch Grass: 6 Project Ideas for People Who Live in a Terminal (Hacktoberfest DEV Challenge, Week 1)

p99, Load Balancers and Autoscaling: Latency Intuition You Can Play With

Averages hide latency problems. Every SRE learns this, usually the hard way: the dashboard says 80ms average while support tickets say the app is slow, because the average smooths over a tai...

DevOps Daily · 3 days ago

p99, Load Balancers and Autoscaling: Latency Intuition You Can Play With

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