Improved local development with wrangler and workerd

Improved local development with wrangler and workerd
Improved local development with wrangler and workerd

For over a year now, we’ve been working to improve the Workers local development experience. Our goal has been to improve parity between users' local and production environments. This is important because it provides developers with a fully-controllable and easy-to-debug local testing environment, which leads to increased developer efficiency and confidence.

To start, we integrated Miniflare, a fully-local simulator for Workers, directly into Wrangler, the Workers CLI. This allowed users to develop locally with Wrangler by running wrangler dev --local. Compared to the wrangler dev default, which relied on remote resources, this represented a significant step forward in local development. As good as it was, it couldn’t leverage the actual Workers runtime, which led to some inconsistencies and behavior mismatches.

Last November, we announced the experimental version of Miniflare v3, powered by the newly open-sourced workerd runtime, the same runtime used by Cloudflare Workers. Since then, we’ve continued to improve upon that experience both in terms of accuracy with the real runtime and in cross-platform compatibility.

As a result of all this work, we are proud to announce the release of Wrangler v3 – the first version of Wrangler with local-by-default development.

A new default for Wrangler

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Ask JJX: How Can I Stop Users From Joining Personal Devices To Our Network Using Their AD Credentials?

Messy RADIUS policies and misconfigurations may be allowing users to join personal devices to your network. Jennifer Minella provides a quick overview of RADIUS and 802.1x, common holes, and three options for filling them in this installment of her "Ask JJX" series.

The post Ask JJX: How Can I Stop Users From Joining Personal Devices To Our Network Using Their AD Credentials? appeared first on Packet Pushers.

Restoring databases from backup requires hands-on practice

It’s important to back up your databases, but it’s even more important to be able to restore it, so once you’ve identified how you’re going to back it up, make sure you test the different recovery scenarios.Broadly speaking, there are two database types considered here, traditional and modern, and  recovery is different for each. A traditional database in this context is a database that runs in a single server or virtual machine that you manage, and a modern database might run across many nodes or it might even be serverless, where you have no access to the underlying infrastructure.Recovering traditional databases Restoring a traditional database is straightforward as long as you have practiced how to handle  different things that could go wrong. You don’t want to test your backup system for the first time during an actual database outage.To read this article in full, please click here

VPP MPLS – Part 2

VPP

About this series

Ever since I first saw VPP - the Vector Packet Processor - I have been deeply impressed with its performance and versatility. For those of us who have used Cisco IOS/XR devices, like the classic ASR (aggregation service router), VPP will look and feel quite familiar as many of the approaches are shared between the two.

I’ve deployed an MPLS core for IPng Networks, which allows me to provide L2VPN services, and at the same time keep an IPng Site Local network with IPv4 and IPv6 that is separate from the internet, based on hardware/silicon based forwarding at line rate and high availability. You can read all about my Centec MPLS shenanigans in [this article].

In the last article, I explored VPP’s MPLS implementation a little bit. All the while, @vifino has been tinkering with the Linux Control Plane and adding MPLS support to it, and together we learned a lot about how VPP does MPLS forwarding and how it sometimes differs to other implementations. During the process, we talked a bit about implicit-null and explicit-null. When my buddy Fred read the [previous article], he also talked about a feature called penultimate-hop-popping which Continue reading

eBay scores cost savings and a bandwidth boost with white-box switches running SONiC

For online auction powerhouse eBay, customer service is everything. Or, as Parantap Lahiri, vice president of network and data center engineering, puts it, “We want to make the network more like air or water, so our people don’t have to worry about network resources when creating magical services for our users.”The demands on the eBay infrastructure are staggering: 1.8 billion active listings; 133 million active buyers. It’s main landing page gets 250 million visits per day. Unlike a static storefront site like Amazon, an eBay auction can entail multiple bidders from all over the world competing against each other as the clock ticks down to the end of the auction. And the eBay platform supports direct communication between sellers and buyers, with offers and counteroffers flying back and forth.To read this article in full, please click here

eBay scores cost savings and a bandwidth boost with white-box switches running SONiC

For online auction powerhouse eBay, customer service is everything. Or, as Parantap Lahiri, vice president of network and data center engineering, puts it, “We want to make the network more like air or water, so our people don’t have to worry about network resources when creating magical services for our users.”The demands on the eBay infrastructure are staggering: 1.8 billion active listings; 133 million active buyers. It’s main landing page gets 250 million visits per day. Unlike a static storefront site like Amazon, an eBay auction can entail multiple bidders from all over the world competing against each other as the clock ticks down to the end of the auction. And the eBay platform supports direct communication between sellers and buyers, with offers and counteroffers flying back and forth.To read this article in full, please click here

Kubernetes Security And Networking 7: Securing Kubernetes Manifests – Video

There’s lot of places to focus on application security, but don’t forget to scan your Kubernetes manifests! This video takes you step-by-step through scanning your repository using Kubescape. https://www.youtube.com/watch?v=kwF-JoIQRTA You can subscribe to the Packet Pushers’ YouTube channel for more videos as they are published. It’s a diverse a mix of content from Ethan and […]

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Full Stack Journey 078: Using pyATS For Network Testing With John Capobianco

On today's Full Stack Journey podcast we examine pyATS, a Python testing framework typically used for network testing. Our guest to explain all things pyATS is John Capobianco. John is a Developer Advocate for Cisco Training Bootcamps and a proponent of Python and automation.

The post Full Stack Journey 078: Using pyATS For Network Testing With John Capobianco appeared first on Packet Pushers.

Detect malicious activity and protect your containerized workloads in Amazon EKS or AWS

As containerized applications become increasingly complex, it can be challenging to design and execute an effective container security strategy. With the growing trend towards cloud-based applications and services, cyber criminals are also evolving their attack techniques, making container security solutions more critical than ever. Calico provides robust detection capabilities to detect known and zero-day container and network-based attacks. In this blog, we will look at Calico’s capabilities to detect network-based attacks.

Calico offers comprehensive protection against both known and zero-day network-based attacks. Using a combination of workload-based IDS/IPS, Calio can detect and block connections to known malicious IPs identified with AlienVault and custom threat intelligence feeds. Calico also uses heuristics-based learning to identify anomalous network activity and prevent zero-day attacks. To further protect against OWASP Top 10 attacks, Calico provides a web application firewall (WAF) that can intercept attacks and prevent them from reaching your applications. Additionally, Calico can also block requests from malicious IPs to prevent DDoS attacks from overwhelming your system.

Malicious attack on cloud-native application and how to prevent it

In this blog, we will go through a scenario where an attacker compromises a public-facing application and gains a foothold in the AWS EC2 or EKS network Continue reading

Introducing SD-WAN With Integrated IoT

The following sponsored blog post was written by Shankar Ramachandran at Palo Alto Networks. We thank Palo Alto Networks for being a sponsor. Internet of things (IoT) devices are now an integral part of any organization’s network. Smart lights, cameras, card readers, printers, etc., are critical to the day-to-day operations of branch offices and retail […]

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Heavy Wireless 002: Making The Transition To WPA3 With Jennifer Minella

On today's Heavy Wireless we discuss transitioning from WPA2 to WPA3, including pros and cons, managing the project, supporting WPA2 and WPA3 simultaneously, and more. My guest is Jennifer Minella, founder and Principal Advisor at Viszen Security. She's also an author, instructor, and blogger.

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Announcing database integrations: a few clicks to connect to Neon, PlanetScale and Supabase on Workers

Announcing database integrations: a few clicks to connect to Neon, PlanetScale and Supabase on Workers
Announcing database integrations: a few clicks to connect to Neon, PlanetScale and Supabase on Workers

One of the best feelings as a developer is seeing your idea come to life. You want to move fast and Cloudflare’s developer platform gives you the tools to take your applications from 0 to 100 within minutes.

One thing that we’ve heard slows developers down is the question: “What databases can be used with Workers?”. Developers stumble when it comes to things like finding the databases that Workers can connect to, the right library or driver that's compatible with Workers and translating boilerplate examples to something that can run on our developer platform.

Today we’re announcing Database Integrations  – making it seamless to connect to your database of choice on Workers. To start, we’ve added some of the most popular databases that support HTTP connections: Neon, PlanetScale and Supabase with more (like Prisma, Fauna, MongoDB Atlas) to come!

Focus more on code, less on config

Our serverless SQL database, D1, launched in open alpha last year, and we’re continuing to invest in making it production ready (stay tuned for an exciting update later this week!). We also recognize that there are plenty of flavours of databases, and we want developers to have the freedom to select what’s Continue reading

Goodbye, section 2.8 and hello to Cloudflare’s new terms of service

Goodbye, section 2.8 and hello to Cloudflare’s new terms of service
Goodbye, section 2.8 and hello to Cloudflare’s new terms of service

Earlier this year, we blogged about an incident where we mistakenly throttled a customer due to internal confusion about a potential violation of our Terms of Service. That incident highlighted a growing point of confusion for many of our customers. Put simply, our terms had not kept pace with the rapid innovation here at Cloudflare, especially with respect to our Developer Platform. We’re excited to announce new updates that will modernize our terms and cut down on customer confusion and frustration.

We want our terms to set clear expectations about what we’ll deliver and what customers can do with our services. But drafting terms is often an iterative process, and iteration over a decade can lead to bloat, complexity, and vestigial branches in need of pruning. Now, time to break out the shears.

Snip, snip

To really nip this in the bud, we started at the source–the content-based restriction housed in Section 2.8 of our Self-Serve Subscription Agreement:

Goodbye, section 2.8 and hello to Cloudflare’s new terms of service

Cloudflare is much, much more than a CDN, but that wasn’t always the case. The CDN was one of our first services and originally designed to serve HTML content like webpages. Continue reading

Cloudflare R2 and MosaicML enable training LLMs on any compute, anywhere in the world, with zero switching costs

Cloudflare R2 and MosaicML enable training LLMs on any compute, anywhere in the world, with zero switching costs
Cloudflare R2 and MosaicML enable training LLMs on any compute, anywhere in the world, with zero switching costs

Building the large language models (LLMs) and diffusion models that power generative AI requires massive infrastructure. The most obvious component is compute – hundreds to thousands of GPUs – but an equally critical (and often overlooked) component is the data storage infrastructure. Training datasets can be terabytes to petabytes in size, and this data needs to be read in parallel by thousands of processes. In addition, model checkpoints need to be saved frequently throughout a training run, and for LLMs these checkpoints can each be hundreds of gigabytes!

To manage storage costs and scalability, many machine learning teams have been moving to object storage to host their datasets and checkpoints. Unfortunately, most object store providers use egress fees to “lock in” users to their platform. This makes it very difficult to leverage GPU capacity across multiple cloud providers, or take advantage of lower / dynamic pricing elsewhere, since the data and model checkpoints are too expensive to move. At a time when cloud GPUs are scarce, and new hardware options are entering the market, it’s more important than ever to stay flexible.

In addition to high egress fees, there is a technical barrier to object-store-centric machine learning training. Reading and Continue reading

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