Announcing wrangler dev — the Edge on localhost

Announcing wrangler dev — the Edge on localhost

Cloudflare Workers — our serverless platform — allows developers around the world to run their applications from our network of 200 datacenters, as close as possible to their users.

A few weeks ago we announced a release candidate for wrangler dev — today, we're excited to take wrangler dev, the world’s first edge-based development environment, to GA with the release of wrangler 1.11.

Think locally, develop globally

It was once assumed that to successfully run an application on the web, one had to go and acquire a server, set it up (in a data center that hopefully you had access to), and then maintain it on an ongoing basis. Luckily for most of us, that assumption was challenged with the emergence of the cloud. The cloud was always assumed to be centralized — large data centers in a single region (“us-east-1”), reserved for compute. The edge? That was for caching static content.

Again, assumptions are being challenged.

Cloudflare Workers is about moving compute from a centralized location to the edge. And it makes sense: if users are distributed all over the globe, why should all of them be routed to us-east-1, on the opposite side of the world, Continue reading

Docker Swarm Services behind the Scenes

Remember the claim that networking is becoming obsolete and that everyone else will simply bypass the networking teams (source)?

Good news for you – there are many fast growing overlay solutions that are adopted by apps and security teams and bypass the networking teams altogether.

That sounds awesome in a VC pitch deck. Let’s see how well that concept works out in reality using Docker Swarm as an example (Kubernetes is probably even worse).

Read more …

Developing and Testing Ansible Roles with Molecule and Podman – Part 1

One of the beauties of the Red Hat Ansible Automation Platform is that the language to describe automation is readable not only by a few dedicated experts, but by almost anyone across the IT ecosystem. That means all IT professionals can take part in the automation, enabling cross team collaboration and really drive automation as a culture inside an organization. With so many people contributing to the automation, it is crucial to test the automation content in-depth. So when you’re developing new Ansible Content like playbooks, roles and collections, it’s a good idea to test the content in a test environment before using it to automate production infrastructure. Testing ensures the automation works as designed and avoids unpleasant surprises down the road. 

Testing automation content is often a challenge, since it requires the deployment of specific testing infrastructure as well as setting up the testing conditions to ensure the tests are relevant. Molecule is a complete testing framework that helps you develop and test Ansible roles, which allows you to focus on the content instead of focusing on managing testing infrastructure.

According to its official documentation, Molecule is a project:

 “designed to aid in the development and testing Continue reading

Technologies that Didn’t: The Fiber Distributed Data Interface

Token Ring, in its original form, was—on paper—a very capable physical transport. For instance, because of the token passing capabilities, it could make use of more than 90% of the available bandwidth. In contrast, Ethernet systems, particularly early Ethernet systems using a true “single wire” broadcast domain, cannot achieve nearly that kind of utilization—hence “every device on its own switch port.” The Fiber Distributed Data Interface, or FDDI, is like Token Ring in many ways. For instance, FDDI uses a token to determine when a station connected to the ring can transmit, enabling efficient use of bandwidth.

And yet, Ethernet is the common carrier of almost all wired networks today, and even wireless standards mimic Ethernet’s characteristics. What happened to FDDI?

FDDI is a 100Mbit/second optical standard based on token bus, which used an improved timed token version of the token passing scheme developed for token ring networks. This physical layer protocol standard had a number of fairly unique features. It was a 100Mbit/second standard at a time when Ethernet offered a top speed of 10Mbits/second. Since FDDI could operate over a single mode fiber, it could support distances of 200 kilometers, or around 120 miles. Because it was Continue reading

The State of Routing Security at DNS Registries

The Domain Name System (DNS) is an important component of the Internet, but it was not designed with security in mind. In the last 20 years or so, much attention has been directed at improving its inherently insecure aspects.

This includes the deployment of DNS Security Extensions (DNSSEC) that enables cryptographic validation of DNS records, and more recently DNS-over-TLS and DNS-over-HTTPS, which encrypts DNS transactions between hosts and resolvers.

The DNS, though, is also dependent on the global routing system for sending DNS queries from resolvers to servers, and then returning the responses. The integrity of the routing system is, therefore, extremely important for ensuring DNS transactions are delivered efficiently to the correct destination. Yet, at present, few DNS registries are implementing Routing Public Key Infrastructure (RPKI), a public key infrastructure framework designed to secure the Internet’s routing infrastructure, specifically the Border Gateway Protocol (BGP).

A survey of 4,138 zones – that included 1,201 generic top-level domains (gTLDs), 308 country code top-level domains (ccTLDs), 271 reverse map zones, and 1,780 sub-ccTLD zones – showed a total of 6,910 route origins for the name servers that are serving these zones.

Yet, just 22% of these had valid Route Origin Authorisations (ROA), Continue reading

Improving the Wrangler Startup Experience

Improving the Wrangler Startup Experience
Improving the Wrangler Startup Experience

Today I’m excited to announce wrangler login, an easy way to get started with Wrangler! This summer for my internship on the Workers Developer Productivity team I was tasked with helping improve the Wrangler user experience. For those who don’t know, Workers is Cloudflare’s serverless platform which allows users to deploy their software directly to Cloudflare’s edge network.

This means you can write any behaviour on requests heading to your site or even run fully fledged applications directly on the edge. Wrangler is the open-source CLI tool used to manage your Workers and has a big focus on enabling a smooth developer experience.

When I first heard I was working on Wrangler, I was excited that I would be working on such a cool product but also a little nervous. This was the first time I would be writing Rust in a professional environment, the first time making meaningful open-source contributions, and on top of that the first time doing all of this remotely. But thanks to lots of guidance and support from my mentor and team, I was able to help make the Wrangler and Workers developer experience just a little bit better.

The Problem

The main improvement Continue reading

What’s the Big Deal About Multi-Cloud Networking – Part 2

If you were experiencing issues with Zoom calls today, you were not alone. But if you take a close look at today’s outage, it is clear that it was correlated with an AWS outage today. In fact, most of Zoom runs on AWS, according to AWS. This is despite Oracle’s claim that millions of users … Continue reading What’s the Big Deal About Multi-Cloud Networking – Part 2 →

11 ways to list and sort files on Linux

There are many ways to list files and display information about them on Linux systems. This post reviews a number of commands that provide details on files and provides options for customizing your file listings to meet your needs.Most of the commands list files within individual directories while others reach as deeply into a file system as you care to look.The primary command for listing files is, of course, ls. This command, however, has an extensive number of options for finding and listing just the files you want to see. Plus, there's always find for helping with very specific file searches.Listing files by name The easiest way to list files by name is simply to list them using the ls command. Listing files by name (alphanumeric order) is, after all, the default. You can choose the ls (no details) or ls -l (lots of details) to determine your view.To read this article in full, please click here

The White Board and the Simulation

In the argument between OSPF and BGP in the data center fabric over at Justin’s blog, I am decidedly in the camp of IS-IS. Rather than lay my reasons out here, however (a topic for another blog post?), I want to focus on something else Justin said that I think is incredibly important for network engineers to understand.

I think whiteboards are the most important tool for network design currently available, which makes me sad. I wish that wasn’t true, I want much better tools. I can’t even tell you the number of disasters averted by 2-3 great network engineers arguing over a whiteboard.

I remember—way back—when I was working on the problems around making a link-state protocol work well in a Mobile Ad Hoc Network (MANET), we had two competing solutions presented to the IETF. The first solution was primarily based on whiteboarding through various options and coming up with one that should reduce flooding to an acceptable level. The second was less optimal on the whiteboard but supported by simulations showing it should reduce flooding more effectively.

Which solution “won?” I don’t know what “winning” might mean here, but the solution designed on the whiteboard has Continue reading

Scaling Docker to Serve Millions More Developers: Network Egress

In Part 1 of this blog we went into a deep dive that analyzed all of the images stored in Docker Hub, the world’s largest container registry. We did this to give you a better understanding of how our new Terms of Service updates will impact development teams who use Docker Hub to manage their container images and CI/CD pipelines.

Part 2 of this blog post takes a deep dive into rate limits for container image pulls. This was also announced as part of our updated Docker Terms of Service (ToS) communications. We detailed the following pull rate limits to Docker subscription plans that will take effect November 1, 2020:

  • Free plan – anonymous users: 100 pulls per 6 hours 
  • Free plan – authenticated users: 200 pulls per 6 hours
  • Pro plan – unlimited
  • Team plan – unlimited

Docker defines pull rate limits as the number of manifest requests to Docker Hub. Rate limits for Docker image pulls are based on the account type of the user requesting the image – not the account type of the image’s owner. For anonymous (unauthenticated) users, pull rates are limited based on the individual IP address. 

We’ve been getting questions from customers Continue reading

Scaling Docker’s Business to Serve Millions More Developers: Storage

At Docker, our mission is to enable developers worldwide to quickly bring their ideas to life by reducing the complexity of application development. While over 6.5 million registered Docker developers are enjoying the benefits of Docker today, we want to scale Docker’s business to the tens of millions of developers who are just discovering Docker. Offering free tools and services is a cornerstone of our mission, and these are funded by our paid subscription services.

In this blog series, we will deep dive into why and how the recently announced Terms of Service changes were introduced. This blog, Part 1, will explore the inactive image retention policy and how it will impact development teams who use Docker Hub for managing their container images. Part 2 will focus on the new rate limits policies that were introduced for image pulls.

A deeper look at Docker Hub images

Delivering containerized applications in a portable, secure, and resource efficient manner also requires tools and services for securely storing and sharing applications with your development team. Today, Docker is proud to offer the world’s largest container registry, Docker Hub, which is used by over 6.5 million developers around the world. Over 15 Continue reading

1 … 848 849 850 851 852 … 3,786