Docker Team’s Favorites from 2015
It’s hard to believe that 2015 is almost over! We saw lots of great content from the Docker community this year including blog posts, tutorials, conference sessions, meetup talks and more – check out our curated collection of community content … ContinuedYour Docker Agenda for January
There are tons of great Docker events all around the world to help you kick off the new year. From webinars to workshops, meetups to conference talks, check out our list of events that are coming up in January. Official … ContinuedLooking Back: 2015 Project Report Card
In early 2015, I posted a look ahead at my planned 2015 projects, where I took a quick look at some of the self-development projects I set out for myself over the course of 2015. In this post, I’m going to review my progress on those 2015 projects.
The 2015 projects were as follows:
- Complete a new book
- Make more open source contributions
- Expand to a new configuration management solution
- Complete a “wildcard project”
So, how well did I do? Let’s take a look.
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Complete a new book: Technically, I haven’t (fully) completed a new book, but given that my new book project with Jason Edelman and Matt Oswalt on network automation is available now as an Early Access edition, I suppose this should count for something. Strangely enough, this wasn’t the book project I had in mind at the start of 2015, but sometimes things like this take unexpected turns. Grade: C
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Make more open source contributions: I expected this one to be easy, but it turns out that this is the area where my performance is the worst. I submitted a pull request to Terraform (for a docs update), but I did not make the contributions Continue reading
In Memoriam: Ian Murdock
Dear friends and members of the open source community, It is with great sadness that we inform you that Ian Murdock passed away on Monday night. This is a tragic loss for his family, for the Docker community, and the … ContinuedTop Posts of 2015
As an eventful 2015 draws to a close we wanted to take a look back at the top posts of 2015.
Red Hat Acquires Ansible, The Open Source It Automation Company.
The title should come as no surprise, as many have predicted such an acquisition in the past. The similar open source ideologies, the technology fit, the executive team's open source background and the rapid adoption of Ansible in the enterprise certainly draw parallels to the world's leader in open source technology.
What was once a prediction is now reality, in just a little more than two years since Ansible, Inc., opened its doors, and we are thrilled! READ MORE
Managing VMware vSphere Guests With Ansible Tower
There are lots of ways to enable self-service VMs within an organisation - what some might call 'a private cloud'. However, these usually require layers and layers of complex software. What if you could leverage your existing hypervisor and 15 lines of code to do the same? And what if those 15 lines became an even simpler single click?
Ansible Core contains a module for managing virtual machines in VMware vSphere environments called vsphere_guest. Using this one module we can talk Continue reading
Top Posts of 2015
As an eventful 2015 draws to a close we wanted to take a look back at the top posts of 2015.
Red Hat Acquires Ansible, The Open Source It Automation Company.
The title should come as no surprise, as many have predicted such an acquisition in the past. The similar open source ideologies, the technology fit, the executive team's open source background and the rapid adoption of Ansible in the enterprise certainly draw parallels to the world's leader in open source technology.
What was once a prediction is now reality, in just a little more than two years since Ansible, Inc., opened its doors, and we are thrilled! READ MORE
Managing VMware vSphere Guests With Ansible Tower
There are lots of ways to enable self-service VMs within an organisation - what some might call 'a private cloud'. However, these usually require layers and layers of complex software. What if you could leverage your existing hypervisor and 15 lines of code to do the same? And what if those 15 lines became an even simpler single click?
Ansible Core contains a module for managing virtual machines in VMware vSphere environments called vsphere_guest. Using this one module we can Continue reading
Next-Generation Network Engineering Skills
There’s no question that the networking industry is undergoing significant changes. Sparked in part by software-defined networking (SDN), this sea change now includes an expanded focus on application programming interfaces (APIs), automation frameworks and toolkits, and improved manageability. As the industry undergoes this change, though, networking engineers must also undergo a change.
To help address this change, I’m very excited to announce a new book project targeting “next-generation network engineering skills.” I’ve joined forces with two folks that I really admire—Jason Edelman and Matt Oswalt—to write a new book focusing on the skills we believe are essential for the next-generation network engineer:
The Early Access edition of the book is available now. If you’re familiar with O’Reilly’s Early Access program, you know that this is an incomplete version right now, but you’ll get regular updates and the final version of the book once it is complete. Plus, you get to provide feedback to us (the authors) while we write, which in turn helps improve the book. (And we greatly desire your feedback!)
So what’s in this book? Here’s a quick look at some of the topics we’re tackling:
- An introduction to Linux, written from a Continue reading
Running Ansible Through an SSH Bastion Host
This post will expand on some previous posts—one showing you how to set up and use an SSH bastion host and a second describing one use case for an SSH bastion host—to show how the popular configuration management tool Ansible can be used through an SSH bastion host.
The configuration/setup required to run Ansible through an SSH bastion host is actually reasonably straightforward, but I saw a lot of incomplete articles out there as I was working through this myself. My hope is to supplement the existing articles, as well as the Ansible documenation, to make this sort of configuration easier for others to embrace and understand.
Prerequisites
There are two key concepts involved here that you’ll want to be sure you understand before you proceed:
- You’ll want to make sure you’re comfortable with using an SSH bastion host. If you don’t understand how this works or how to set it up, I recommend you spend some time on this topic first, as it’s crucial to how Ansible will behave/function. This article by Grant Taylor has some good information.
- Spend some time making sure you know how to use SSH multiplexing. This is useful for Ansible in general, but Continue reading
Docker Online Meetup #30: Docker Trusted Registry 1.4.1
We recently hosted a Docker Online Meetup that was all about Docker Trusted Registry. Software Engineer Tony Holdstock-Brown demoed DTR 1.4.1 and discussed the latest features including: – Image deletion and garbage collection – Set up, and manage user accounts, teams, organizations, and … ContinuedDockerCon 2016: Registration and CFP Now Open!
Both conference passes and the Call for Papers for DockerCon 2016 are now open to the public! Join us for DockerCon 2016 at the Washington State Convention Center in beautiful Seattle, Washington on June 19-21, 2016. We strongly recommend registering … ContinuedDocs Spotlight: Keeping the FM in RTFM
Crafting and maintaining high quality documentation is something we all know is very important. Reputable documentation is much more than the result of fantastic product or project management - especially when we're talking about community-driven documentation. Open source communities in particular like to reference "RTFM" (Read the Fine Manual, for the cleaner acronym explanation), but that's only helpful when the "Fine Manual" contains quality documentation. For projects like Ansible, it is our active users that make all the difference, and with their contributions and efforts we are able to help provide the great documentation that supports Ansible. But, that also comes with some caveats.
Many people contribute to open source projects so that they may "scratch their own itch." Whether this works well or creates clunky and cluttered code is not up for debate in this blog post, but how well it works in relation to open source documentation is debatable. Often contributions boil down to very bare bones coverage of a feature or implementation, other times the only contribution made is a typo fix. And while even the small fixes are helpful, these are not the contributions that make the docs great (better, yes, but not yet reaching Continue reading
Docs Spotlight: Keeping the FM in RTFM
Crafting and maintaining high quality documentation is something we all know is very important. Reputable documentation is much more than the result of fantastic product or project management - especially when we're talking about community-driven documentation. Open source communities in particular like to reference "RTFM" (Read the Fine Manual, for the cleaner acronym explanation), but that's only helpful when the "Fine Manual" contains quality documentation. For projects like Ansible, it is our active users that make all the difference, and with their contributions and efforts we are able to help provide the great documentation that supports Ansible. But, that also comes with some caveats.
Many people contribute to open source projects so that they may "scratch their own itch." Whether this works well or creates clunky and cluttered code is not up for debate in this blog post, but how well it works in relation to open source documentation is debatable. Often contributions boil down to very bare bones coverage of a feature or implementation, other times the only contribution made is a typo fix. And while even the small fixes are helpful, these are not the contributions that make the docs great (better, yes, but not yet reaching Continue reading
Docker Webinar Q&A: Intro To Docker Security
Today, security is one the biggest topics within the enterprise world and tops the list of enterprise IT initiatives. As companies have begun to adopt containers within their environments, they have realized the security benefits that come with them as … ContinuedTechnology Short Take #58
Welcome to Technology Short Take #58. This will be the last Technology Short Take of 2015, as next week is Christmas and the following week is the New Year’s holiday. Before I present this episode’s collection of links, articles, and thoughts on various data center technologies, allow me to first wish all of my readers a very merry and very festive holiday season. Now, on to the content!
Networking
- Looking for a step-by-step install guide for VMware NSX? This one is a bit older (refers to NSX 6.1 and the current release is 6.2), but you might find it helpful nevertheless.
- Ray Budavari—who is an absolutely fantastic NSX resource—has a blog post up on the integration between VMware NSX and vRealize Automation. This first post (judging by the “part 1” in the title this will be a series) is a bit light on details, but I’m hoping future posts will dive deeper into this topic.
- Mustafa Akin has an article on Docker’s new overlay networking functionality. He describes how to set it up (on both VirtualBox and Digital Ocean) and provides some high-level performance information as well.
- If you’d like to play around with Cumulus Linux but don’t Continue reading
Containerd: a daemon to control runC
As we build out Docker’s infrastructure plumbing, we are committed to releasing these plumbing components as open source to help the community. Today we’re releasing a new daemon to control runC called: containerd. It’s built for performance and density, and will eventually be … ContinuedThe Cloud Native Computing Foundation is getting started today
In July Docker became a Founding Member of the Cloud Native Computing Foundation (CNCF). Today the CNCF gets started with a ratified open governance structure including a Technical Oversight Committee (TOC) to direct technical decisions, for which nominations are open. … ContinuedDockerCon EU 2015 Videos: Docker, Docker, Docker
And all of the videos from the Docker, Docker, Docker track at DockerCon EU 2015 are now available! Check out the recorded sessions and slides below. Getting Started with Docker – Sam Alba,Sr. Director of Engineering, Docker and Jeff Morgan, … ContinuedUsing Cloud-Init to Register an Instance into Consul
This post describes a method for using cloud-init to register a cloud instance into Consul on provisioning. I tested this on OpenStack, but it should work on any cloud platform that supports metadata services that can be leveraged by cloud-init.
I worked out the details for this method because I was interested in using Consul as a means to provide a form of “dynamic DNS” for OpenStack instances. (You can think of it as service registration and discovery for OpenStack instances.) As I’ll point out later in this post, there are a number of problems with this approach, but—if for no other reason—it was helpful as a learning exercise.
The idea was to automatically register OpenStack instances into Consul as they were provisioned. Since Consul offers a DNS interface, other instances and/or workloads could use DNS to look up these nodes’ registration. Consul offers an HTTP API (see here for details), so I started there. I used Paw (a tool I described here) to explore Consul’s HTTP API, building the necessary curl commands along the way. Once I had the right curl commands, the next step was to build a shell script that would pull the current Continue reading
Modifying OpenStack Security Groups with Terraform
In this post I’d like to discuss a potential (minor) issue with modifying OpenStack security groups with Terraform. I call this a “potential minor” issue because there is an easy workaround, which I’ll detail in this post. I wanted to bring it to my readers’ attention, though, because as of this blog post this matter had not yet been documented.
As you probably already know if you read my recent introduction to Terraform blog post, Terraform is a way to create configurations that automate the creation or configuration of infrastructure components, possibly across a number of different providers and/or platforms. In the introductory blog post, I showed you how to write a Terraform configuration that would create an OpenStack logical network and subnet, create a logical router and attach it to the logical network, and then create an OpenStack instance and associate a floating IP. In that example, I used a key part of Terraform, known as interpolation.
Broadly speaking, interpolation allows Terraform to reference variables or attributes of other objects created by Terraform. For example, how does one refer to a network that he or she has just created? Here’s an example taken from the introductory blog post: