Tuesday Feb 10, 2015

February 2015 Oracle Linux Newsletter is Now Available

The February 2015 edition of the Oracle Linux newsletter is now available! In this issue, learn about:

  • The Next Generation of Oracle's Engineered Systems launch
  • Oracle Linux on the Docker Hub Registry
  • Unbreakable Enterprise Kernel R3 Quarterly Update 4
  • Oracle OpenStack for Oracle Linux architecture overview
  • Several new customer stories
  • And much more!

You can read the latest edition online right now, or subscribe to get it automatically sent to your inbox. Enjoy!

Friday Feb 06, 2015

Friday Spotlight: Docker!

Happy Friday!

If you missed it yesterday, we did a press release describing the posting of Oracle Linux images on the Docker Hub Registry. If you're already working with Docker or interested in getting started with it, Oracle Linux gives you an extremely solid foundation to build on.

For a bit more on Docker, we did a webcast in November called Building the Modern Cloud-Enabled Data Center, where Docker and other trending topics were discussed. Have a view of the replay.

Also, did you know that you can bookmark tag searches on Oracle blogs? For example, to find posts on our blog about Docker, you'd use this:

https://blogs.oracle.com/linux/tags/docker

Click that link and bookmark it, and you'll always have the complete list of Oracle Linux Blog posts that mention Docker.

Have a great week and we'll see you next Friday!

-Chris 

Thursday Feb 05, 2015

Press Release: Oracle Linux Now Hosted on the Docker Hub Registry

Oracle Linux images are now available on the Docker Hub Registry, a repository for Docker-based components, including applications and operating systems (OSs). Oracle Linux joins MySQL, which is already extremely popular on Docker Hub and has been downloaded millions of times.

This is exciting news for Oracle Linux and for the Docker community. Please read the press release to get all the details.

-Chris 

Friday Dec 05, 2014

Friday Spotlight: Tips on Managing and Designing Your Deployments

Happy Friday!

Over the last couple of weeks, we've done two fantastic live webcasts giving you tips on how to better manage your Oracle Linux environments. We discussed using Docker, Linux Containers, OpenStack, Spacewalk, and more. If you're looking to get a primer on how these technologies can help you, have a listen to the following on demand versions at your convenience.

Building the Modern Cloud-Enabled Data Center

Spacewalk and Ksplice: Keeping Oracle Linux Systems Up to Date and Secure

Have a great week, we'll see you next Friday!

-Chris 

Friday Nov 21, 2014

Friday Spotlight: Get The Story Straight From The Source

Happy Friday!

One of the great things about webcasts is that you get to hear directly from Oracle experts and even ask questions about your own environment. They are a great way to get in-depth information straight from the source, especially if you weren’t able to come out to Oracle OpenWorld this year.

Coming up next Tuesday, we have an excellent webcast hosted by Oracle Linux Product Management Director Avi Miller, “Spacewalk and Ksplice: Keep Oracle Linux Systems Up to Date and Secure.” In the webcast, Avi will explain the details on using Spacewalk and Ksplice with Oracle Linux. And you’ll be able to ask Avi questions through the chat interface. And since Avi is based in Australia, we’ve scheduled this webcast at 3PM PST, allowing our friends in that part of the world to be able to tune in at a reasonable hour.

Spacewalk and Ksplice: Keep Oracle Linux Systems Up to Date and Secure
Tuesday, November 25, 2014
3:00PM PST

And thank you to those of you that joined our webcast this past Tuesday on Building the Modern Cloud-Enabled Data Center! If you missed that one, it’s a great introduction to Linux Containers, Docker, OpenStack, and more. The replay is just over 20 minutes, so you can head on over and check it out for a very concise overview of these technologies:


Have a great week!
-Chris

Friday Nov 14, 2014

Friday Spotlight: Docker, Spacewalk, LISA14, Korea Linux Forum, and More!

Happy Friday!

It’s been a fun and exciting week here, it’s difficult to pick a single item for the Spotlight. So here is a round up of the news:

- We released the official Docker images for Oracle Linux. No longer a tech preview, the Docker Engine and official Oracle Linux images are fully supported as part of Oracle Linux Basic and Premier support subscriptions.

- If you missed it last week, the Spacewalk client for Oracle Linux 7 was released. You can read more here.

- We had a great time at LISA14, with many of you getting to talk to our experts at the booth and attending Ken Crandall’s session on the modern, cloud-enabled data center. Here is a picture of a live Ksplice demo going on at the booth (yes, rebooting is obsolete!):

If you weren’t at the show and want to see Ken’s session (and I highly recommend it), you can catch a webcast version this coming Tuesday:

Building the Modern Cloud-Enabled Data Center with Oracle Linux 7
Date: Tuesday, November 18, 2014
Time: 9:00 am PST

Come and hear Ken's insightful views on how Oracle can help you build a modern infrastructure. 

- We were also at the Linux Foundation’s Korea Linux Forum. Another great opportunity to answer your questions about Oracle Linux, our Oracle staff at the show told me there was a great response at the booth and our speaking session on Btrfs.


- The Oracle Linux November newsletter is out! It’s a great way to catch up on everything that happened this year at Oracle OpenWorld 2014, read about product releases over the last 8 weeks or so, and much more. You can read it online here, or subscribe so it arrives automatically in your inbox.

Whew, it was a busy week! We hope you have a great weekend and we’ll see you next week with more.

-Chris

Thursday Oct 30, 2014

Oracle Linux - The Engine Behind the Modern Data Center

With increasing budget constraints and resource limitations, it’s becoming more and more important to leverage technological advances to squeeze as much value as possible out of your data center deployments. Innovative tools such as Ksplice, DTrace, Linux Containers, Docker, Spacewalk, and more, can help you to deploy and manage your deployments quicker and easier, increasing overall ROI. Join this November webcast series to learn how these technologies with Oracle Linux can streamline deployment and management of your critical IT systems.

Building the Modern Cloud-Enabled Data Center with Oracle Linux 7
Date: Tuesday, November 18, 2014
Time: 9:00 am PST

Register here

Spacewalk and Ksplice: Keep Oracle Linux Systems Up to Date and Secure
Date: Tuesday, November 25, 2014
Time 3:00 pm PST

Please note the 3:00 pm PST start time on this one to accommodate our friends in JAPAC. Replays will be available afterward if these dates and times are inconvenient for you.
Register here

Monday Aug 25, 2014

Ahoy! Cast off with Docker on Oracle Linux

There's no need to upgrade to Oracle Linux 7 to start playing with Docker: we've built it for Oracle Linux 6 and the Unbreakable Enterprise Kernel Release 3 and released it into the addons channel on http://public-yum.oracle.com. This release of Docker uses the native libcontainers engine by default as well as supporting btrfs as the storage engine. 

If you've already got Oracle Linux 7 installed, don't worry we have you covered: we've released Docker for Oracle Linux 7 as well.

Installation

To install Docker on Oracle Linux 6:

  1. Enable the ol6_addons channel in /etc/yum.repos.d/public-yum-ol6.repo
  2. Run:
    # yum install docker

To install Docker on Oracle Linux 7:

  1. Enable the ol7_addons channel in /etc/yum.repos.d/public-yum-ol7.repo
  2. Run:
    # yum install docker

Enable btrfs support

Docker uses device-mapper devices as the default storage engine. To switch to using btrfs as the storage engine, ensure that /var/lib/docker is mounted on a btrfs filesystem. Check Chapter 5 of the Oracle Linux Administrator's Solutions Guide for more details on how to create and mount btrfs filesystems.

To enable btrfs support for Docker on Oracle Linux:

  1. Ensure that /var/lib/docker is on a btrfs filesystem
  2. Edit /etc/sysconfig/docker and add "-s btrfs" to the other_args fields.
  3. Restart the Docker daemon:
    # service docker restart

Enabling and starting Docker

To enable the Docker daemon on system boot and start Docker on OL6:

# chkconfig docker on

# service docker start

To enable the Docker daemon on system boot and start Docker on OL7:

# systemctl enable docker.service

# systemctl start docker.service

Checking Docker status

To check that Docker is up and running on OL6:

# service docker status

To check that Docker is up and running on OL7:

# systemctl status docker.service

You can also get more information from Docker itself:

# docker info

# docker version

Once you have Docker up and running, follow the upstream Docker documentation to get started. 

Known Issues

Docker unmounts btrfs filesystems on shutdown

If you're running Docker using the btrfs storage engine and you stop the Docker service, it will unmount the btrfs filesystem during the shutdown process. You should ensure the filesystem is mounted properly prior to restarting the Docker service. On Oracle Linux 7, you can use a systemd.mount definition and modify the Docker systemd.service to depend on the btrfs mount defined in systemd.

SElinux support with btrfs on Oracle Linux 7

SElinux must be set to Permissive or Disabled in order to use the btrfs storage engine on Oracle Linux 7.

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