The History of Containers

Given the recent massive spike in interest in Linux Containers, you could be forgiven for wondering, “Why now?”. It has been argued that the increasingly prevalent cloud computing model more closely resembles hosting providers than traditional enterprise IT, and that containers are a perfect match for this model.

Despite the sudden ubiquity of container technology, like so much in the world of open source software, containerization depends on a long series of previous innovations, especially in the operating system. “One cannot resist an idea whose time has come.” Containers are such an idea, one that has been a long time coming.

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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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Red Hat Directory Server 10 Now Generally Available

Today, we are pleased to announced the general availability of Red Hat Directory Server 10, the latest version of Red Hat’s open source, network-based registry server. Built on the technologies delivered by the 389 Directory Server project, Red Hat Directory Server offers a Lightweight Directory Access Protocol (LDAP)-compliant server that centralizes critical application information, simplifies user management and enhances security across an entire organization.

As a tool for building business applications, Red Hat Directory Server provides

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Identity Management and Two-Factor Authentication Using One-Time Passwords

Two-factor authentication, or 2FA, is not something new. It has existed for quite some time and in different forms. What is a ‘factor’? A factor is something you have, something you know, or something you are. For example, if we combine a PIN that you know, with your fingerprint, we get a 2FA based on biometrics. In practice, biometric solutions are not often used because it’s not especially difficult to steal someone’s fingerprint (…and it is quite hard to revoke or replace your finger). The more practical approach to two-factor authentication is to combine something you know, a PIN or password, with something you have.

Something you have often comes in form of

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Red Hat Delivers Leading Application Performance with the Latest Intel Xeon Processors

With every new Intel Xeon processor generation, the benefits typically span beyond simple increases in transistor counts or the number of cores within each processor. Things like increased memory capacity per chip or larger on-chip caches are tangible and measurable, and often have a direct effect on performance, resulting in record-breaking scores on various standard benchmarks.

There is, however, more to every new processor family launch than meets the eye. These new chips often send a ripple of innovation throughout our ecosystem of partners, forcing them to re-evaluate and re-visit existing performance results and break the status quo. The ability to support these partners is of paramount importance to Red Hat and, as a result, Red Hat Enterprise Linux is often being selected by our partners to support their ongoing benchmarking efforts.

Yesterday, Intel launched the Intel Xeon E7 v3 processor family with several new world record industry-standard benchmarks. Red Hat Enterprise Linux was used in nearly one-third of all results. The following table captures these leading results

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Enterprise-Ready Container Orchestration with Kubernetes

Here on the Red Hat Enterprise Linux Blog we’ve dedicated a number of posts to containers and a variety of associated Red Hat solutions.  Whether you’re seeking to deploy Red Hat Enterprise Linux 6 applications on Red Hat Enterprise Linux 7 as containers, hoping to better understand how atomic updates work, or are simply out to learn all you can about Red Hat Enterprise Linux Atomic Host – there’s likely a post (here) with the information you need.  However, we’ve yet to really explore container orchestration.  To this end, I invite you to read this new post from Red Hat’s own Joe Fernandes.  Joe talks about Kubernetes, Google’s tool for managing clusters of Linux containers, its progenitor (i.e Google’s Borg), and how Red Hat is building on top of Kubernetes to bring web-scale container infrastructure to enterprise customers.

Understanding the Changes to ‘docker search’ and ‘docker pull’ in Red Hat Enterprise Linux 7.1

If you’re working with container images on Red Hat Enterprise Linux 7.1 or Red Hat Enterprise Linux Atomic Host, you might have noticed that the search and pull behavior of the included docker tool works slightly differently than it does if you’re working with that of the upstream project. This is intentional.

When we started the planning process for containers in RHEL 7.1, we had 3 goals in mind:

  1. Give control over the search path to the end-user administrator
  2. Enable a federated approach to search and discovery of docker-formatted container images
  3. Support the ability for Red Hat customers to consume container images and other content included as part of their Red Hat Subscription

The changes we implemented, which are documented on the Red Hat Customer Portal, affect three different areas of the tool:

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