Populating New Namespaces Using Heptio Ark

Heptio Ark is a tool designed to backup and restore Kubernetes cluster resources and persistent volumes. As such, it enables users to do a bunch of very useful things like copy cluster resources across cloud providers or replicate environments for development, staging, testing, QA, etc. In this post, I’ll share a slightly different use case for Ark: populating resources into new Kubernetes namespaces.

Kubernetes namespaces, if you’re not familiar, are a way to scope resource names and provide a way to divide cluster resources between multiple resources via resource quotas (see the Kubernetes documentation on namespaces for more details). As such, when you create a new Kubernetes namespace, it’s empty. However, you may have a need or desire to have certain things present in every namespace within a cluster—for example, perhaps you have a set of ExternalName Services that point to resources outside the cluster to make it easier for applications and developers to integrate with external resources. Maybe you have a ConfigMap that developers can use to configure their applications. It could be that you want a particular secret to be present in all new namespaces so that developers don’t need to worry about managing certain credentials. In such Continue reading

What do you believe now that you didn’t five years ago? Centralized wins. Decentralized loses.

 

 

Decentralized systems will continue to lose to centralized systems until there's a driver requiring decentralization to deliver a clearly superior consumer experience. Unfortunately, that may not happen for quite some time.

I say unfortunately because ten years ago, even five years ago, I still believed decentralization would win. Why? For all the idealistic technical reasons I laid out long ago in Building Super Scalable Systems: Blade Runner Meets Autonomic Computing In The Ambient Cloud.

While the internet and the web are inherently decentralized, mainstream applications built on top do not have to be. Typically, applications today—Facebook, Salesforce, Google, Spotify, etc.—are all centralized.

That wasn't always the case. In the early days of the internet the internet was protocol driven, decentralized, and often distributed—FTP (1971), Telnet (<1973), FINGER (1971/1977),  TCP/IP (1974), UUCP (late 1970s) NNTP (1986), DNS (1983), SMTP (1982), IRC(1988), HTTP(1990), Tor (mid-1990s), Napster(1999), and XMPP(1999).

We do have new decentalized services: Bitcoin(2009), Minecraft(2009), Ethereum(2104), IPFS(2015), Mastadon(2016), and PeerTube(2018). We're still waiting on Pied Piper to deliver the decentralized internet. 

On an evolutionary timeline decentralized systems are neanderthals; centralized systems are the humans. Neanderthals came first. Humans may have interbred with neanderthals, humans may have even killed off the neanderthals, but Continue reading

Learn More About Docker at VMworld 2018

The Docker team will be at VMworld in Las Vegas next week (Aug. 26-30) to interact with IT leaders and virtualization administrators and share the latest on Docker Enterprise – the leading enterprise-ready container platform that supports your choice of technology stacks, application types, operating systems and infrastructure. Register today to get a guided tour of Docker Enterprise.

 

Secure Your Legacy, Protect Your Future – See How Docker Works for Windows Server Migrations

Come by Booth #2513 near the Mobility Zone to learn more about container platforms and how Docker Enterprise is the only solution that can help IT migrate applications from Windows Server 2008 to Windows Server 2016 – without recoding!

Windows Server 2008 is approaching End of Support which means security and maintenance patches will be discontinued. Don’t risk your business critical apps with an unpatched and unsupported operating system. Discover the simplest way to move off of Windows Server 2008 (and even Windows Server 2003) with a proven methodology using Docker Enterprise and  purpose-built containerization. With Docker, you can:

  • Eliminate legacy app security risks and improve reliability
  • Make your apps portable and cloud-ready
  • Cut costs by 50% from increased server consolidation and operational efficiencies

Stop by, talk to our Continue reading

Episode 33 – The Importance Of Breaking Things

Conventional wisdom tells us that a network that never breaks is the most resilient, but practice tells us otherwise. In this episode we explore the value of chaos engineering and how breaking your network intentionally can make it stronger.

 

Chris Morrow
Guest
Michael Kehoe
Guest

Jordan Martin
Host
Eyvonne Sharp
Host
Russ White
Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post Episode 33 – The Importance Of Breaking Things appeared first on Network Collective.

Getting To The Root Of Security With Trusted Silicon

The increasingly distributed nature of computing and the rapid growth in the number of the small connected devices that make up the Internet of Things (IoT) are combining with trends like the rise of silicon-level vulnerabilities highlighted by Spectre, Meltdown, and more recent variants to create an expanding and fluid security landscape that’s difficult for enterprises to navigate. …

Getting To The Root Of Security With Trusted Silicon was written by Jeffrey Burt at .

Reality Check: Self-Driving Networks

I stumbled upon an article with an interesting title (and worth reading): To Make Self-Driving Cars Safe, We Also Need Better Roads and Infrastructure… and thought about the claims along the lines of “if they managed to solve the self-driving cars challenge, it’s realistic to expect self-driving networks” made in Self-Driving Networks podcast episode. Turns out the self-driving cars problem is far far away from being solved.

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