What the heck is Docker?

What the heck is Docker?

What the heck is Docker and why would I use it?

Docker simplifies the packaging, distribution, installation and execution of (complex) applications.

In this context, applications are:

Full Article here from Docker Pirates ARMed with explosive stuff

Houses are VMs, apartments are containers

Houses are VMs, apartments are containers

Nice analagy from Mike Coleman about the underlying architecture of Docker.

Houses (the VMs) are fully self-contained and offer protection from unwanted guests. They also each possess their own infrastructure – plumbing, heating, electrical, etc. Furthermore, in the vast majority of cases houses are all going to have at a minimum a bedroom, living area, bathroom, and kitchen. I’ve yet to ever find a “studio house” – even if I buy the smallest house I may end up buying more than I need because that’s just how houses are built.  (for the pedantic out there, yes I’m ignoring the new trend in micro houses because they break my analogy)

Apartments (the containers) also offer protection from unwanted guests, but they are built around shared infrastructure. The apartment building (Docker Host) shares plumbing, heating, electrical, etc. Additionally apartments are offered in all kinds of different sizes – studio to multi-bedroom penthouse. You’re only renting exactly what you need. Finally, just like houses, apartments have front doors that lock to keep out unwanted guests.

Full story from Mike Coleman’s article

Announcing Docker Cloud

Announcing Docker Cloud

Another new feature and revenue generator for Docker.  This announcement officially integrates the features from Tutum (an acquisition made in Oct of 2015).  Tutum is a cloud service used by developers and sysadmins to deploy and manage Docker applications.

Docker Cloud is where developers and IT ops meet to build, ship and run any application, anywhere. Over the past few months our team has been hard at work expanding on the features of Tutum and building native integration with Docker Hub, Docker ID (the new shared account system across all Docker services), Docker official repositories, and commercially supported Docker Engine (CS Engine).

Start using Docker Cloud today by logging in to Docker Cloud using your Docker ID.

Full story at Docker Blog

Future DevOps Juggernaut

Future DevOps Juggernaut

Docker recently announced the launch of its newest platform, Docker Datacenter

  1. The new Docker Datacenter is a platform for secure application deployment and management that will give new tools to IT operations professionals to help them better manage Dockerized applications.
  2. The increased management, security, and orchestration capabilities will help administrators more easily make the case for Docker use within their organization.
  3. Docker’s move to more fully embrace the operations side of applications could better position the company to take the crown as a DevOps powerhouse within the enterprise.

Full story from TechRepublic

Ten Things Storage Managers Need to Know About Docker

Ten Things Storage Managers Need to Know About Docker

A good read for Storage Admins new to Docker.  In a nutshell, Docker / containers simplifies and makes life easier for IT storage administrators.

“Here are ten things storage managers need to know about Docker and other container technologies.”

  1. Why has Docker/containerization has garnered so many advocates? Makes life easy…
  2. Why is VM storage so different from container storage? Persistence…
  3. ….

Full Article by Drew Robb

Scaling with Docker Part 1

Scaling with Docker Part 1

Good introductory read on scaling with Docker from Brandon Okert 

Feb 16, 2016

This is the first in a two part post about Scaling with Docker. In Part 1, we’ll focus on getting started with Docker from a scaling perspective. For the most part this will be an intro to Docker, so if you’re already experienced using mutli-container hosts, docker networks, volume containers, monitoring tools, and management scripts, feel free to skim this part. In Part 2, we’ll use the fundamentals from Part 1 to organize scalable multi-host systems, then show where to start to take that to very large scale applications.