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Backwards-compatibility in Cloudflare Workers

Cloudflare Workers is our serverless platform that runs your code in 250+ cities worldwide.

On the Workers team, we have a policy:

A change to the Workers Runtime must never break an application that is live in production.

It seems obvious enough, but this policy has deep consequences. What if our API has a bug, and some deployed Workers accidentally depend on that bug? Then, seemingly, we can't fix the bug! That sounds… bad?

This post will dig deeper into our policy, explaining why Workers is different from traditional server stacks in this respect, and how we're now making backwards-incompatible changes possible by introducing "compatibility dates".

TL;DR: Developers may now opt into backwards-incompatible fixes by setting a compatibility date.

Serverless demands strict compatibility

Workers is a serverless platform, which means we maintain the server stack for you. You do not have to manage the runtime version, you only manage your own code. This means that when we update the Workers Runtime, we update it for everyone. We do this at least once a week, sometimes more.

This means that if a runtime upgrade breaks someone's application, it's really bad. The developer didn't make any change, so won't be watching for Continue reading

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Graceful Restart and BFD

The whole High Availability Switching series started with a question along the lines of “does it make sense to run BFD together with Graceful Restart”. After Non-Stop Forwarding 101, Graceful Restart 101, and Graceful Restart and Convergence Speed we finally have enough information to answer that question.

TL&DR: Most probably not.

A more nuanced answer depends (as always) on a gazillion implementation details.

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Graceful Restart and BFD

The whole High Availability Switching series started with a question along the lines of “does it make sense to run BFD together with Graceful Restart”. After Non-Stop Forwarding 101, Graceful Restart 101, and Graceful Restart and Convergence Speed we finally have enough information to answer that question.

TL&DR: Most probably not.

A more nuanced answer depends (as always) on a gazillion implementation details.

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Using the xargs command on Linux to simplify your work

The xargs command on Linux can make it easier to build and execute commands. If you want to run the same command for a group of files or users, xargs can often make that process easier. Here's a very simple example of xargs that creates or updates the update time on some files.$ echo file1 file2 file3 | xargs touch $ ls -l total 0 -rw-r--r--. 1 shs shs 0 Oct 15 12:41 file1 -rw-r--r--. 1 shs shs 0 Oct 15 12:41 file2 -rw-r--r--. 1 shs shs 0 Oct 15 12:41 file3 The command below is similar, but creates a file with blanks in its name because the -d specifies the input termination character.To read this article in full, please click here

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Using the xargs command on Linux to simplify your work

The xargs command on Linux can make it easier to build and execute commands. If you want to run the same command for a group of files or users, xargs can often make that process easier. Here's a very simple example of xargs that creates or updates the update time on some files.$ echo file1 file2 file3 | xargs touch $ ls -l total 0 -rw-r--r--. 1 shs shs 0 Oct 15 12:41 file1 -rw-r--r--. 1 shs shs 0 Oct 15 12:41 file2 -rw-r--r--. 1 shs shs 0 Oct 15 12:41 file3 The command below is similar, but creates a file with blanks in its name because the -d specifies the input termination character.To read this article in full, please click here

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Tech Bytes: What’s New With Palo Alto Networks Prisma SD-WAN 5.6 (Sponsored)

Today on Tech Bytes podcast we look at new features in Palo Alto Networks Prisma SASE and Prisma SD-WAN, including digital experience management for home and branch users, new Cloudblades, a new appliance, and enhanced AI Ops capabilities.

The post Tech Bytes: What’s New With Palo Alto Networks Prisma SD-WAN 5.6 (Sponsored) appeared first on Packet Pushers.

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Tech Bytes: What’s New With Palo Alto Networks Prisma SD-WAN 5.6 (Sponsored)

Today on Tech Bytes podcast we look at new features in Palo Alto Networks Prisma SASE and Prisma SD-WAN, including digital experience management for home and branch users, new Cloudblades, a new appliance, and enhanced AI Ops capabilities.

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How to Break into a Cloud Engineering Career?

So, “How do you check the MAC address of the NIC in your favorite Linux distro?” was the question, which my mentee had failed to answer, and the interviewer had ended the conversation much earlier. Not a good sign. In fact, his problem wasn’t just the fact that he didn’t know the command, but he […]

The post How to Break into a Cloud Engineering Career? appeared first on Packet Pushers.

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How Zero-Trust Can Mitigate Common Ransomware Risks

Implementing a zero-trust network architecture enables enterprises to box in a ransomware attack, limiting the extent to which a fraudster can commandeer data and resources.

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Gartner: Top strategic technology trends for 2022

Digital investments, be they in AI, cloud, security, or engineering, will be among the top technology drivers for 2022, according to Gartner’s annual forecast of what it expects will be leading strategic IT trends.Gartner: IT skills shortage hobbles cloud, edge, automation growth “It is an overarching drive for organizations to do more with and scale the digital environments they have been rapidly developing during the pandemic,” said David Groombridge, research vice president at Gartner. “Most of these trends define technologies that together show how  businesses will reconnect  with partners and consumers to create scalable, resilient technical foundations for the future.” Gartner unwrapped its forecast at its virtual IT Symposium/Xpo Americas this week.To read this article in full, please click here

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Gartner: Top strategic technology trends for 2022

Digital investments, be they in AI, cloud, security, or engineering, will be among the top technology drivers for 2022, according to Gartner’s annual forecast of what it expects will be leading strategic IT trends.Gartner: IT skills shortage hobbles cloud, edge, automation growth “It is an overarching drive for organizations to do more with and scale the digital environments they have been rapidly developing during the pandemic,” said David Groombridge, research vice president at Gartner. “Most of these trends define technologies that together show how  businesses will reconnect  with partners and consumers to create scalable, resilient technical foundations for the future.” Gartner unwrapped its forecast at its virtual IT Symposium/Xpo Americas this week.To read this article in full, please click here

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Crawler Hints Update: Cloudflare Supports IndexNow and Announces General Availability

In the midst of the hottest summer on record, Cloudflare held its first ever Impact Week. We announced a variety of products and initiatives that aim to make the Internet and our planet a better place, with a focus on environmental, social, and governance projects. Today, we’re excited to share an update on Crawler Hints, an initiative announced during Impact Week. Crawler Hints is a service that improves the operating efficiency of the approximately 45% of Internet traffic that comes from web crawlers and bots.

Crawler Hints achieves this efficiency improvement by ensuring that crawlers get information about what they’ve crawled previously and if it makes sense to crawl a website again.

Today we are excited to announce two updates for Crawler Hints:

1. The first: Crawler Hints now supports IndexNow, a new protocol that allows websites to notify search engines whenever content on their website content is created, updated, or deleted. By collaborating with Microsoft and Yandex, Cloudflare can help improve the efficiency of their search engine infrastructure, customer origin servers, and the Internet at large.
   
2. The second: Crawler Hints is now generally available to all Cloudflare customers for free. Customers can benefit from these more Continue reading

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The Hidden Vampires of IT Ops That Obstruct Digital Transformation

The vampires of IT Ops lurk in your enterprise, cloaked in the status quo, striking down operational agility at every turn. If you want to successfully run and transform your business, you need to expose those vampires to the sunlight now.

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Today’s Scripts Are Tomorrow’s Technical Debt: Gluware LiveStream Video [5/8]

Michael Haugh, VP Of Product Marketing at Gluware, joins Greg Ferro of the Packet Pushers for a discussion of building a network automation system on top of a platform instead of DIY with Python, Ansible, etc. If Gluware might be a fit for your network automation needs, visit here. Thanks! You can subscribe to the […]

The post Today’s Scripts Are Tomorrow’s Technical Debt: Gluware LiveStream Video [5/8] appeared first on Packet Pushers.

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Network Break 355: Azure Brags About DDoS Protection; Marvell Hitches Ride With Dent Network OS

Today on the Network Break, we discuss Marvell's choice of the Dent network OS for its Prestera silicon, Microsoft shares details about how its Azure cloud service thwarted a 2.4Tbps DDoS attack, a researcher shares details on snooping data from a copper patch lead, and other tech tidbits.

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Network Break 355: Azure Brags About DDoS Protection; Marvell Hitches Ride With Dent Network OS

Today on the Network Break, we discuss Marvell's choice of the Dent network OS for its Prestera silicon, Microsoft shares details about how its Azure cloud service thwarted a 2.4Tbps DDoS attack, a researcher shares details on snooping data from a copper patch lead, and other tech tidbits.

The post Network Break 355: Azure Brags About DDoS Protection; Marvell Hitches Ride With Dent Network OS appeared first on Packet Pushers.

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BGP Flow Specification Version 2

The post BGP Flow Specification Version 2 appeared first on Noction.

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Google SRE: Site Reliability Engineering at a Global Scale

When DevOps was coined around 2009, its purpose was to break down silos between development and IT operations. DevOps has since become a game of tug-of-war between the reliability needs of the operations team and the velocity goals on the developer side. Site reliably engineering became that balancer. As Benjamin Treynor Sloss, designer of Google’s SRE program, puts it: “SRE is what happens when you ask a software engineer to design and run operations.” The SRE team has emerged as the answer to how you can build systems at scale, striking that balance between velocity, maintainability and efficiency. It was only logical that this year’s books on site reliability engineering. Of course, almost everyone outside of Google will probably not work on anything at this scale, but, because increasingly distributed systems are constantly integrating with others, Continue reading

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Tunnel: Cloudflare’s Newest Homeowner

Cloudflare Tunnel connects your infrastructure to Cloudflare. Your team runs a lightweight connector in your environment, cloudflared, and services can reach Cloudflare and your audience through an outbound-only connection without the need for opening up holes in your firewall.

Whether the services are internal apps protected with Zero Trust policies, websites running in Kubernetes clusters in a public cloud environment, or a hobbyist project on a Raspberry Pi — Cloudflare Tunnel provides a stable, secure, and highly performant way to serve traffic.

Starting today, with our new UI in the Cloudflare for Teams Dashboard, users who deploy and manage Cloudflare Tunnel at scale now have easier visibility into their tunnels’ status, routes, uptime, connectors, cloudflared version, and much more. On the Teams Dashboard you will also find an interactive guide that walks you through setting up your first tunnel.  

Getting Started with Tunnel

We wanted to start by making the tunnel onboarding process more transparent for users. We understand that not all users are intimately familiar with the command line nor are they deploying tunnel in an environment or OS they’re most comfortable with. To alleviate that burden, we designed a comprehensive onboarding guide with pathways for MacOS, Continue reading

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Intel’s 2nd-gen neuromorphic chip is 10x smarter than the first

Four years after Intel first introduced Loihi, the company’s first neuromorphic chip, the company has released its second generation processor, which Intel says will provide faster processing, greater resource density, and improved power efficiency.CPUs are often called the brains of the computer but aren’t, really, since they process only a handful of tasks at once in a serial manner, nothing like what the brain does automatically to keep you alive. Neuromorphic computing attempts to replicate the functions of the brain by performing numerous tasks simultaneously, with emphasis on perception and decision makingChip shortage will hit hardware buyers for months to years Neuromorphic chips mimic neurological functions through computational “neurons” that communicate with one another. The first generation of Loihi chips had around 128,000 of those digital neurons; the Loihi 2 has more than a million.To read this article in full, please click here