How best to return from a cliffhanger ending – in a previous post we used Django’s Model class .save() to write network state—that is CLI standard output transformed to JSON using pyATS—into a PostgreSQL database table. Django also helped us convert, or migrate, a Pythonic class-based model into this SQL table in the first place. […]
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With the Calico 3.10 release, Dynamic Packet Capture is available in Dynamic Service Graph.
This means users who require self-service, live troubleshooting for microservices and Kubernetes workloads can capture and evaluate traffic packets on endpoints without writing a single line of code or using any 3rd-party troubleshooting tools. Users don’t need to learn about or have knowledge of kubectl or YAML to troubleshoot their microservices and Kubernetes cluster. Calico helps enforce organizational security policies by only allowing users to access their assigned namespaces and endpoints for troubleshooting.
In most situations when you need to do a packet capture, the problem doesn’t last long and usually happens randomly. But once you narrow down the issue to a particular time or activity, you will need to set the right action plan to tackle the problem. Packet capture is now much easier, simpler, and faster than before.
Dynamic Packet Capture facilitates fast troubleshooting and easy debugging of microservice connectivity issues and performance hotspots in Kubernetes clusters. It is a Kubernetes-native custom resource that runs as part of user code against specific workloads in the cluster, without the need to execute any programs inside the cluster. Dynamic Packet Capture Continue reading
Ready to get started? The following resources and tutorials will enhance your understanding of container network security and help you get started.
Get an independent analyst’s view on the state of container security:
Many container network security experts are blogging about lessons learned and sharing their knowledge on how to secure mod- ern applications. Follow their conversations:
Developers and platform operators alike need to learn how to secure applications and platforms. Why not take a class to enrich your understanding? There are many free and low-cost options, including the following:
Ethan Banks and Ned Bellavance hosted a panel discussion at VMworld 2021 with two VMware customers using VMware Cloud---the University of Miami and Sterling National Bank. This discussion looks at what works, where the customers ran into issues, and how their cloud journeys are progressing.
The post Day Two Cloud 122: Two Customer Journeys To VMware Cloud (Sponsored) appeared first on Packet Pushers.
“Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.” — Sherlock Holmes
It’s not every day that you get to debug what may well be a packet of death. It was certainly the first time for me.
What do I mean by “a packet of death”? A software bug where the network stack crashes in reaction to a single received network packet, taking down the whole operating system with it. Like in the well known case of Windows ping of death.
Challenge accepted.
Around a year ago we started seeing kernel crashes in the Linux ipv4 stack. Servers were crashing sporadically, but we learned the hard way to never ignore cases like that — when possible we always trace crashes. We also couldn’t tie it to a particular kernel version, which could indicate a regression which hopefully could be tracked down to a single faulty change in the Linux kernel.
The crashed servers were leaving behind only a crash report, affectionately known as a “kernel oops”. Let’s take a look at it and go over what information we have there.
Parts of the oops, like offsets into Continue reading
ITRenew has announced that Pluribus Netvisor ONE OS and the Adaptive Cloud Fabric controllerless SDN software are now available as part of Sesame by ITRenew rack-scale cloud solutions.
The post The Circular Data Center: Deploy a Cloud Operating Model While Lowering Cost and Climate Impacts appeared first on Pluribus Networks.
ITRenew has announced that Pluribus Netvisor ONE OS and the Adaptive Cloud Fabric controllerless SDN software are now available as part of Sesame by ITRenew rack-scale cloud solutions. Pluribus is very pleased to take part in this new circular approach to building data centers; one where we can deliver a cloud operating model with on-prem performance, while also helping our customers achieve their sustainability goals.
The timing of this partnership is apropos given the global attention to COP26, the United Nations Climate Change Conference and ongoing efforts worldwide to scale back emissions. While all industries have a responsibility on this front, the data center industry has specific, well-documented sustainability challenges that are only just starting to be properly addressed.
Most efforts to build the “green data center” have largely focused on increasing energy efficiency and using renewable energy sources, even though power used during the operational phase is only part of the problem. The bigger environmental culprit is that the industry continues to manufacture and deploy brand-new IT infrastructure equipment at a rapid pace.
In its report, “The Financial & Sustainability Case for Circularity,” ITRenew used a lifecycle model, assuming a typical 3-year operational lifetime for the equipment, Continue reading
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Dan Augustine sent me a wonderful example illustrating how even a very simple data model together with some automation templates can simplify a large-scale deployment.
We have a 100 router installation coming up for our schools and both of our installation vendors do not use open source templating tools and they are not willing to share.
Having taken the Data Models in Network Automation part of your Network Automation Concepts webinar, I decided to install GitLab, make an Ansible project and invite our installation partners to the project.
Dan Augustine sent me a wonderful example illustrating how even a very simple data model together with some automation templates can simplify a large-scale deployment.
We have a 100 router installation coming up for our schools and both of our installation vendors do not use open source templating tools and they are not willing to share.
Having taken the Data Models in Network Automation part of your Network Automation Concepts webinar, I decided to install GitLab, make an Ansible project and invite our installation partners to the project.