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Achieving CI Velocity at Tigera using Semaphore

Tigera serves the networking and policy enforcement needs of more than 150,000 Kubernetes clusters across the globe and supports two product lines: open source Calico, and Calico Enterprise. Our development team is constantly running smoke, system, unit, and functional verification tests, as well as all our E2Es for these products. Our CI pipelines form an extremely important aspect of the overall IT infrastructure and enable us to test our products and catch bugs before release.

We eventually reached a point where we needed to adopt a complete continuous integration and delivery architecture to maintain our development velocity, from code push to Kubernetes. We decided to adopt the hosted CI solution from Semaphore as an integral part of our workflow. Our test rigs on Semaphore ensure that the product is tested on three Kubernetes versions on seven different platforms, including Kubeadm, GKE, EKS, AKS, OpenShift, Rancher, and Kops. As a result, a typical pipeline can have up to 100 jobs distributed over various stages. We also have different pipelines to test our code and build Docker images for it.

Here’s a run for one of the components of our open source offering: All the Continue reading

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Operations Channel at AnsibleFest 2020

AnsibleFest 2020 is right around the corner and we could not be more excited. This year we have some great content in each of our channels. Here is a preview of what attendees can expect from the Operations channel at AnsibleFest.

 

Operations Channel

This channel will take Operators on an automation journey through the Technical Operations lifecycle and how The Ansible Automation Platform is the center of your automation goals. Learn how to get your automation moving with Certified Content Collections, then scale out with execution environments and tune the performance. Once you are running at scale we have tools to show you what teams are using automation and how much it is saving you with some real world examples and by using Analytics. 

You should be leaving with some great examples and walkthroughs on infrastructure automation, from  operating systems to public cloud and how you can leverage Ansible Automation Platform to foster cross-functional team collaboration and empower your whole organization with automation they need.

There will be something for everyone. You’ll get to hear from customers, Red Hatters and our partners. Also pick up some tips for your server deployments, performance and cluster management. 

 

Operation Continue reading

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The Growing Security Priority for DevOps and Cloud Migration

Survey asserts security may be increasingly top of mind, but many organizations are unsatisfied with their current footing on that front.

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Let World Alzheimer’s Day Remind Us to Take Our Own Brain Health Seriously

In the list of diseases that can affect your brain, Alzheimer’s disease is a critical one. From it not only affects the biology of the brain, it also affects the personality of the person. That is why it is necessary to talk about Alzheimer’s, because talking about this disease helps create awareness about brain health. On World Alzheimer’s Day, Sept. 21, 2020, talking about it will help create a sense of seriousness and importance.

How to Keep Your Brain Healthy

There are some diseases that are inevitable. That means that they cannot be stopped from occurring, but what an individual can do is make sure that you keep your brain health better and active.

Sleep Better

By sleeping better, you are making sure that your brain is getting the right rest. This means that you make sure that you are being provided with a situation where you are resting and your brain is working actively to make sure that it keeps you and your body healthy. That is why a good night’s sleep can help not only elevate your mood but also help keep you healthy and strong.

Eat Well and Healthy

By eating healthy and well, you will Continue reading

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Migrating cdnjs to serverless with Workers KV

Cloudflare powers cdnjs, an open-source project that accelerates websites by delivering popular JavaScript libraries and resources via Cloudflare’s network. Since our major update in December, we focused on remodelling cdnjs for scalability and resilience. Today, we are excited to announce how Cloudflare delivers cdnjs—a migration to a serverless infrastructure using Cloudflare Workers and its distributed key-value store Workers KV!

What is cdnjs?

For those unfamiliar, cdnjs is an acronym describing a Content Delivery Network (CDN) for JavaScript (JS). A CDN simply refers to a geographically distributed network of servers that provide Internet content, whether it is memes, cat videos, or HTML pages. In our case, the CDN refers to Cloudflare’s ever expanding network of over 200 globally distributed data centers.

And here’s why this is relevant to you: it makes page load times lightning-fast. Virtually every website you visit needs to fetch JS libraries in order to load, including this one. Let’s say you visit a Sydney-based website that contains a local file from jQuery, a popular library found in 76.2% of websites. If you are located in New York, you may notice a delay, as it can easily exceed 300ms to fetch the file—not to mention Continue reading

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Telehealth usage soars during COVID-19

Internet-based virtual healthcare, sometimes called telehealth or telemedicine, has seen a massive increase in usage during the pandemic, according to new research.A study by University of Michigan's National Poll on Healthy Aging (NPHA) found that a quarter of older adults aged between 50 and 80 had a virtual medical visit over a network in the first three months of the coronavirus pandemic. By comparison, in a similar poll from 2019, just 4% of people over 50 said they had ever had a virtual visit with a doctor. READ MORE: Pandemic reveals the need for better telemedicineTo read this article in full, please click here

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Disaster Recovery: a Vendor Marketing Tale

Several engineers formerly working for a large virtualization vendor were pretty upset with me when I claimed that the virtualization consultants promote “disaster recovery using stretched VLANs” designs instead of alternatives that would implement proper separation of failure domains.

Guess what… it’s even worse than I thought.

Here’s a sequence of comments I received after reposting one of my “disaster recovery doesn’t need stretched VLANs” blog posts on LinkedIn sometime in late 2019:

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DNS Query Privacy Revisited

A year has passed since we first looked at the level of use of Query Name Minimisation in the DNS and at the time the results were not impressive. It's time to relook at this topic and see what has changed in the DNS resolution environment over the past 12 months.

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A smarter emacs

I’ve been running Emacs for like 25 years. But I’ve never really configured it with anything fancy.

Sure, I’ve set some shortcut keys, and enabled global-font-lock-mode and set indent size, but that’s almost it.

All my coding is done in tmux&Emacs. One project gets exactly one tmux session. Window 0 is emacs. Window 1 is make && ./a.out (sometimes split panes to tail logs or run both server and client), and to run git commands. The remaining windows are used for various things like reading manpages etc….

I have that same workflow whether I’m editing a blog post or doing kernel programming.

This way I can work at my desk with large and plentiful screens, and then move to my laptop and everything continues working exactly the same.

tmux I’ve customized, but not that much with Emacs.

So, step one to get my coding environment to be less 1995, and more 2020: make my editor understand my code, and show me stuff about it.

I’m learning as I’m going, and writing what I’m learning. As always if you see something wrong then please leave a comment.

Code annotations and other semantic understanding

The way to do this is Continue reading

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Spotlight on NSX Performance at VMworld 2020

As we ramp up towards one of the premiere online tech events — in one of the most extraordinary years of a lifetime — I would like to shine a spotlight on what is being planned around NSX performance during this year’s virtual conference to help you get the most out of the event. VMWorld 2020 is right around the corner — and for the first time in two decades, it’s free! So, Register Now if you haven’t done so already!

NSX Performance Thus Far

Over the years, we’ve looked at the NSX performance numbers with and without hardware-level features, such as Geneve Offload and Geneve Rx Filters, that are key to optimal performance. If these topics are new to you, I would encourage reading up on the performance section of the NSX-T Reference Design Guide for a working knowledge of NSX-T performance before attending this year’s NSX-T Performance Session at VMworld.

NSX-T Performance Session at VMworld 2020

Given the virtual format of this year’s NSX-T Performance Session, I’ve decided to take a slightly different approach. Not only will I share performance numbers, but I’ll also demonstrate how different hardware-level features influence performance, and I’ll discuss feature and tuning Continue reading

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My Thoughts on LinkedIn in 2020

LinkedIn originated with a focus on connecting professionals and contacts were supposed to be people that you know or worked with. The early team worked hard to build a monopoly/network effect around business connections.  Much of LinkedIn’s interface usability stems from that design intention. Now there is tension between what was LinkedIn was 10 years […]

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Developer Channel at AnsibleFest 2020

As a developer, have you ever made a change that takes down an entire Kubernetes production cluster, requiring you to rebuild all YAML and automation scripts to get production back up?  Have you ever wanted to create reproducible, self-contained environments that can be run locally or in production? Welcome to the new AnsibleFest Developer Channel! Here you can learn how Ansible is critical to the journey of the developer as an open-source software configuration management, provisioning and application-deployment tool that enables infrastructure as code.  

 

Ansible Developer Channel

Many themes will be presented in the Ansible Developer Channel, including Kubernetes operations, Red Hat Ansible Automation Platform use cases, as well as execution speed and development efficiency considerations. You can learn how Ansible can streamline Kubernetes Day 2 Operations, where monitoring, maintenance and troubleshooting come into play and the application moves from a development project to an actual strategic advantage for your business. You will also learn how Ansible execution environments solve problems for developers using Ansible Automation Platform and how to create self-contained environments that can be run locally or in production Red Hat Ansible Tower deployments. In addition, you can learn how to optimize execution speed and Continue reading

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New Arm processor promises smart storage

Arm Ltd. last week announced the Cortex-R82, a chip that is both storage and data processing-capable, which could enable a whole new generation of storage devices that help process the data they store.Storage processor chips, such as those made by Marvell but also storage device makers like EMC, handle the I/O and disk management, but if you want to process the data, that job falls to the CPU. This means data has to be moved in and out of the drive to be processed, a job that falls to two separate devices.But there is an emerging hardware category known as computational storage where the processing is done where the data resides, rather than moving it into memory. Data is processed through various methods, like indexing and schema, eliminating the latency of data movement and freeing up the CPU. Obviously this can only be done on SSDs.To read this article in full, please click here

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New Arm processor promises smart storage

Arm Ltd. last week announced the Cortex-R82, a chip that is both storage and data processing-capable, which could enable a whole new generation of storage devices that help process the data they store.Storage processor chips, such as those made by Marvell but also storage device makers like EMC, handle the I/O and disk management, but if you want to process the data, that job falls to the CPU. This means data has to be moved in and out of the drive to be processed, a job that falls to two separate devices.But there is an emerging hardware category known as computational storage where the processing is done where the data resides, rather than moving it into memory. Data is processed through various methods, like indexing and schema, eliminating the latency of data movement and freeing up the CPU. Obviously this can only be done on SSDs.To read this article in full, please click here

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The Hedge Podcast 51: Tim Fiola and pyNTM

Have you ever looked at your wide area network and wondered … what would the traffic flows look like if this link or that router failed? Traffic modeling of this kind is widely available in commercial tools, which means it’s been hard to play with these kinds of tools, learn how they work, and understand how they can be effective. There is, however, an open source alternative—pyNTM. While this tool won’t replace a commercial tool, it can give you “enough to go on” for many network operators, and give you the experience and understanding needed to justify springing for a commercial product.

download

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Day Two Cloud 065: Building Your Cloud On-Ramp With SD-WAN

SD-WAN vendors offer a variety of mechanisms to connect end users to cloud applications while incorporating policy and performance requirements. Day Two Cloud co-host Ethan Banks interviewed many of these vendors to understand the architectural nitty-gritty of different approaches. In this episode, he shares the fruits of his research.

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Day Two Cloud 065: Building Your Cloud On-Ramp With SD-WAN

SD-WAN vendors offer a variety of mechanisms to connect end users to cloud applications while incorporating policy and performance requirements. Day Two Cloud co-host Ethan Banks interviewed many of these vendors to understand the architectural nitty-gritty of different approaches. In this episode, he shares the fruits of his research.

The post Day Two Cloud 065: Building Your Cloud On-Ramp With SD-WAN appeared first on Packet Pushers.

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Network Vendor Loyalty Benefits Continue to Dwindle

It is imperative that you begin building relationships with multiple vendors that can help differentiate their products from others they're competing with.

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Why Routers and Switches Don’t Matter Now

Stop futzing with one device and think about the system.

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Unimog – Cloudflare’s edge load balancer

As the scale of Cloudflare’s edge network has grown, we sometimes reach the limits of parts of our architecture. About two years ago we realized that our existing solution for spreading load within our data centers could no longer meet our needs. We embarked on a project to deploy a Layer 4 Load Balancer, internally called Unimog, to improve the reliability and operational efficiency of our edge network. Unimog has now been deployed in production for over a year.

This post explains the problems Unimog solves and how it works. Unimog builds on techniques used in other Layer 4 Load Balancers, but there are many details of its implementation that are tailored to the needs of our edge network.

The role of Unimog in our edge network

Cloudflare operates an anycast network, meaning that our data centers in 200+ cities around the world serve the same IP addresses. For example, our own cloudflare.com website uses Cloudflare services, and one of its IP addresses is 104.17.175.85. All of our data centers will accept connections to that address and respond to HTTP requests. By the magic of Internet routing, when you visit cloudflare.com and your Continue reading