Establishing VPC Peering with Pulumi and Go

I use Pulumi to manage my lab infrastructure on AWS (I shared some of the details in this April 2020 blog post published on the Pulumi site). Originally I started with TypeScript, but later switched to Go. Recently I had a need to add some VPC peering relationships to my lab configuration. I was concerned that this may pose some problems—due entirely to the way I structure my Pulumi projects and stacks—but as it turned out it was more straightforward than I expected. In this post, I’ll share some example code and explain what I learned in the process of writing it.

Some Background

First, let me share some background on how I structure my Pulumi projects and stacks.

It all starts with a Pulumi project that manages my base AWS infrastructure—VPC, subnets, route tables and routes, Internet gateways, NAT gateways, etc. I use a separate stack in this project for each region where I need base infrastructure.

All other projects build on “top” of this base project, referencing the resources created by the base project in order to create their own resources. Referencing the resources created by the base project is accomplished via a Pulumi StackReference.

In my Continue reading

Pin, Unpin, and why Rust needs them

Pin, Unpin, and why Rust needs them
Pin, Unpin, and why Rust needs them

Using async Rust libraries is usually easy. It's just like using normal Rust code, with a little async or .await here and there. But writing your own async libraries can be hard. The first time I tried this, I got really confused by arcane, esoteric syntax like T: ?Unpin and Pin<&mut Self>. I had never seen these types before, and I didn't understand what they were doing. Now that I understand them, I've written the explainer I wish I could have read back then. In this post, we're gonna learn

  • What Futures are
  • What self-referential types are
  • Why they were unsafe
  • How Pin/Unpin made them safe
  • Using Pin/Unpin to write tricky nested futures

What are Futures?

A few years ago, I needed to write some code which would take some async function, run it and collect some metrics about it, e.g. how long it took to resolve. I wanted to write a type TimedWrapper that would work like this:

// Some async function, e.g. polling a URL with [https://docs.rs/reqwest]
// Remember, Rust functions do nothing until you .await them, so this isn't
// actually making a HTTP request yet.
let async_fn = reqwest::get("http://adamchalmers.com");

// Wrap the  Continue reading

A closer look at two newly announced Intel chips

Our initial look at Intel’s Architecture Day focused on the new Xeons and IPU processors. Now we’ll get into the fine details, as well as look at other upcoming technologies.Sapphire Rapids Intel’s upcoming next-generation Xeon is codenamed Sapphire Rapids and promises a radical new design and gains in performance. One of its key differentiators is its modular SoC design. The chip has multiple tiles that appears to the system as a monolithic CPU and all of the tiles communicate with each other, so every thread has full access to all resources on all tiles.To read this article in full, please click here

A closer look at two newly announced Intel chips

Our initial look at Intel’s Architecture Day focused on the new Xeons and IPU processors. Now we’ll get into the fine details, as well as look at other upcoming technologies.Sapphire Rapids Intel’s upcoming next-generation Xeon is codenamed Sapphire Rapids and promises a radical new design and gains in performance. One of its key differentiators is its modular SoC design. The chip has multiple tiles that appears to the system as a monolithic CPU and all of the tiles communicate with each other, so every thread has full access to all resources on all tiles.To read this article in full, please click here

Tech Bytes: DDOS and State Exhaustion With NETSCOUT – Updated

Its not widely that DDOS attacks also cause damage from state exhaustion in devices. A recent study why Netscout surprised me that many engineers are aware of overload bandwidth or routing devices but give less considerations to state exhaustion in application aware devices. 

The post Tech Bytes: DDOS and State Exhaustion With NETSCOUT – Updated appeared first on Packet Pushers.

How IT Pros Learn Online In 2021

I surveyed 53 IT professionals about online IT training in August 2021. Most of the folks I interact with are networking & cloud infrastructure professionals, and the answers reflect that. 53 responses isn’t enough to draw hard and fast conclusions from, but I still believe there are interesting trends & individual comments worth thinking about.

By the way, if you’d like to submit your own responses, I left the survey open. I told Google Forms to not collect email addresses, so your responses are anonymous.

1. Which online learning sites do you have a subscription to or have bought an IT course from?

  1. Udemy – 32
  2. Pluralsight – 24
  3. INE – 19
  4. A Cloud Guru – 16
  5. CBT Nuggets – 12
  6. Coursera – 9
  7. O’Reilly / Safari – 7
  8. ITProTV – 4
  9. LinkedIn Learning / Lynda – 3
  10. Juniper Learning Portal – 2
  11. Pearson – 2
  12. Skillshare – 2
  13. Adrian Cantrill – 1
  14. Cisco Learning Network – 1
  15. Global Knowledge – 1
  16. Ivan Pepelnjak – 1
  17. KBITS – 1
  18. Kirk Byers – 1
  19. Routehub – 1
  20. Skillsoft – 1
  21. TalkPython – 1
  22. Teachable – 1
  23. YouTube – 1

I believe Udemy is so popular because it’s a great platform to Continue reading

Hedge 97: Low Context DevOps

Language is deeply contextual—one of my favorite sayings from the theological world is if you take the text out of its context, you are just left with the con. What does context have to do with development and operations, though? Can there be low and high context situations in the daily life of building and running systems? Thomas Limoncelli joins Tom Ammon and Russ White to discuss the idea of low context devops, and the larger issue of context in managing projects and teams, on this episode of the Hedge.

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The Huge Payoff Of Extreme Co-Design In Molecular Dynamics

When money is really no object and the budget negotiations involve taking a small slice of your personal net worth of $7.5 billion out of one pocket and putting it into another, and you have the technical chops to understand the complexities of molecular dynamics and have a personal mission to cure disease, then you can build any damned supercomputer you want. …

The Huge Payoff Of Extreme Co-Design In Molecular Dynamics was written by Timothy Prickett Morgan at The Next Platform.

Linux turns 30

Something happened back in 1991 that dramatically changed the future of computing. Linus Torvalds, a Finnish-American software engineer, released the Linux kernel and the second version of the GNU General Public License (GPLv2). A good portion of the technology we use today would not be what it is had this not happened.It all started on August 25th of that year when Torvalds announced in a usenet post that he was working on a free OS and that it would be ready within a few months. He also said it "won't be big and professional like gnu," but that wasn't exactly how things turned out!The GPL The beauty of the Gnu GPL was that, instead of restricting what users can do with the Linux kernel, it maximized their rights. Richard Stallman, GNU founder, referred to these rights as the "four freedoms." They include the freedom to run, copy, study/improve and distribute. This was akin to turning the function of a license inside out.To read this article in full, please click here

Linux turns 30

Something happened back in 1991 that dramatically changed the future of computing. Linus Torvalds, a Finnish-American software engineer, released the Linux kernel and the second version of the GNU General Public License (GPLv2). A good portion of the technology we use today would not be what it is had this not happened.It all started on August 25th of that year when Torvalds announced in a usenet post that he was working on a free OS and that it would be ready within a few months. He also said it "won't be big and professional like gnu," but that wasn't exactly how things turned out!The GPL The beauty of the Gnu GPL was that, instead of restricting what users can do with the Linux kernel, it maximized their rights. Richard Stallman, GNU founder, referred to these rights as the "four freedoms." They include the freedom to run, copy, study/improve and distribute. This was akin to turning the function of a license inside out.To read this article in full, please click here

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