Architecting Containers Part 1: Why Understanding User Space vs. Kernel Space Matters

Perhaps you’ve been charged with developing a container-based application infrastructure?  If so, you most likely understand the value that containers can provide to your developers, architects, and operations team. In fact, you’ve likely been reading up on containers and are excited about exploring the technology in more detail. However, before diving head-first into a discussion about the architecture and deployment of containers in a production environment, there are three important things that developers, architects, and systems administrators, need to know

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What’s New with Red Hat Enterprise Linux System Administration? Find Out.

On Thursday, July 30, 2015, Red Hat will be presenting a free webinar for system administrators, engineers, and architects to learn what’s new with Red Hat Enterprise Linux.

During this webinar Red Hat curriculum manager and Red Hat Certified Architect, Michael Jarrett, will teach you about the new and changed features in Red Hat Enterprise Linux 7. He’ll focus on system administration topics that have changed significantly or are particularly important in Red Hat Enterprise Linux 7. He’ll also discuss the skills and expert knowledge needed to measure and influence performance on these systems.

Then Pete Hnath, director of curriculum, will show you how easy it is to train on Red Hat Enterprise Linux 7 and update your skills with the new Red Hat Learning Subscription, a year-long, all-access pass to more than 30 online learning courses.

Register today!

Exploring Red Hat Access Insights

With the release of Red Hat Enterprise Linux 6.7, we’re happy to also announce general availability of Red Hat Access Insights, a new hosted service from Red Hat designed to help customers proactively identify and resolve issues that could impact business operations.

Given the complexity and scale of modern IT environments, we recognize that it can be increasingly complicated to monitor, maintain, and secure enterprise infrastructure.  By tapping into Red Hat’s collective experience

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What’s Next for Containers? User Namespaces

What are user namespaces? Sticking with the apartment complex analogy, the numbering of users and groups have historically been the same in every container and in the underlying host, just like public channel 10 is generally the same in every unit in an apartment building.

But, imagine that people in different apartments are getting their television signal from different cable and satellite companies. Channel 10 is now different for for each person. It might be sports for one person, and news for another.

Historically, in the Linux kernel, there was a single data structure which held users and groups. Starting in kernel version 3.8

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