Friday May 22, 2015

FRIDAY SPOTLIGHT: Getting Started with Docker on Oracle Linux

Happy Friday everyone! 

We have a great technical article for you this Friday.  In this article, you learn how to customize a Docker container image and use it to instantiate application instances across different Linux servers. This article describes how to create a Dockerfile, how to allocate runtime resources to containers, and how to establish a communication channel between two containers (for example, between web server and database containers). 

Ginny Henningsen quotes "Docker is exciting because it can easily capture a full application environment into a virtual container that can be deployed across different Linux servers. System administrators and software developers are learning that Docker can help them deploy application images on Linux quickly, reliably, and consistently—without dependency and portability problems that can inject delays into planned deployment schedules. Docker containers can define an application and its dependencies using a small text file (a Dockerfile) that can be moved to different Linux releases and quickly rebuilt, simplifying application portability. In this way, "Dockerized" applications are easily migrated to different Linux servers where they can execute on bare metal, in a virtual machine, or on Linux instances in the cloud. "

As shown in Figure 1, Docker containers consume fewer resources than "heavyweight" hypervisor-based solutions. Hypervisor-based solutions host a full-blown operating system instance in each virtual machine guest, but this also allows them to support different operating systems. (Oracle VM, for example, can host Oracle Linux, Oracle Solaris, and Microsoft Windows in virtual machines.) 

Read more 

Tuesday Sep 11, 2012

ServerWatch Interview with Wim Coekaerts

ServerWatch just published an insightful interview with Wim Coekaerts, Senior Vice President of Linux and Virtualization Engineering at Oracle.

It also includes a short video clip of the interview, in which Wim shares some more thoughts about Oracle Linux, Solaris and related technologies and how they are developed at Oracle. If you would like to learn more about our motivation and strategy around Linux and Solaris, this one is a must-read!

"The Solaris team is hiring more people, and I'm hiring more people," Coekaerts said. "We're making both better and we're not favoring one over the other."

Thursday Feb 02, 2012

New article on OTN: How I Used CGroups to Manage System Resources In Oracle Linux 6

We just published a new article on OTN: How I Used Cgroups to Manage System Resource in Oracle Linux 6 by Ginny Henningsen.

In this article, Ginny explains how to use the Linux kernel's built-in resource control mechanisms (called "Cgroups") to manage the allocation of CPUs and memory to processes and how to configure disk I/O throttling for certain groups of processes. Cgroups is a very powerful and flexible feature of the Linux kernel. We hope you will find this article useful!

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