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 

Friday Jan 10, 2014

Oracle Linux Friday Spotlight - January 10, 2014

Happy Friday!

Our spotlight this week is on a great technical article over at Oracle Technology Network written by Oracle's Christopher Jones titled "How to Set Up DTrace to Detect PHP Scripting Problems on Oracle Linux."

The Unbreakable Enterprise Kernel release 3 (UEK) provides built-in support for DTrace. This can help you track down performance problems with your applications or scripts. In this article, Christopher walks through how to enable DTrace for the popular scripting language PHP on Oracle Linux and goes into some detail to how it works, including a simple D script to get information out of a sample PHP script.

This is a really fantastic article, so if you're interested in using DTrace to tune your PHP scrips, give it a read through.

We'll see you next week! 

-Chris 

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