In the first blog post about the experimental Docker Application Packages, Gareth showed how our new open-source docker-app can be used to augment Compose files by adding metadata and separate settings. Now that you know how to create an Application Package, how do you share it? Using a Docker registry solution like Docker Hub or Docker Enterprise of course! Let’s look at an example that works with the latest release of docker-app. Here’s a simple single-file format Application Package with the filename hello.dockerapp: # This section contains your application metadata. version: 0.1.0 name: hello description: “A simple HTTP echo server” maintainers: – name: Chris Crone…
If you’re running an edge version of Docker on your desktop (Docker for Mac or Docker for Windows Desktop), you can now stand up a single-node Kubernetes cluster with the click of a button. While I’m not a developer, I think this is great news for the millions of developers who have already been using Docker on their Macbook or Windows laptop because they now have a fully compliant Kubernetes cluster at their fingertips without installing any other tools. Developers using Docker to build containerized applications often build Docker Compose files to deploy them. With the integration of Kubernetes into the…
During the DockerCon 2016 keynote, I demonstrated a development workflow with Docker for Mac, going from a fresh laptop to a running app in no time. The especially cool part was when I live-debugged a Node.js app running inside a container from my IDE, despite having no Node.js runtime installed on my laptop. Here I’m going to show you how to do it yourself. Here’s what you’ll need: Docker: I recommend Docker for Mac or Windows, which are in public beta. An IDE which supports Node.js remote debugging: I used Visual Studio Code. A Node.js application: I’ll create a simple one…
High availability (HA) isn’t just about keeping the lights on all the time; it’s also about quickly turning them back on when they unexpectedly go out. With software, this means capabilities for fault tolerance as well as backup and recovery. Docker Datacenter (DDC) provides this for both the container-based applications as well as the application infrastructure components (such as cluster management, orchestration, account settings, etc.). In this post we will look at how high availability is achieved in the latest release of Docker Datacenter. As a refresher, Docker Datacenter is comprised of the following software: Universal Control Plane (UCP) with…
We are excited to introduce Docker Engine 1.11, our first release built on runC ™ and containerd ™. With this release, Docker is the first to ship a runtime based on OCI technology, demonstrating the progress the team has made since donating our industry-standard container format and runtime under the Linux Foundation in June of 2015. Over the last year, Docker has helped advance the work of the OCI to make it more readily available to more users. It started in December 2015, when we introduced containerd ™, a daemon to control runC. This was part of our effort to break out Docker into small reusable components. With…
When we released Docker 1.10 and Docker Compose 1.6 on February 4th, we provided you with an easy way to build a fully featured and scalable app. It’s amazing what you can do with just one simple file. I am constantly impressed what a docker-compose up gets you now. Networks and Volumes are now first class citizens of Docker Compose. That gives you a lot of control, allowing you to for instance put individual services on more than one network, and easily share volumes.
In the previous version of Docker Engine we added a completely new system for managing networks and volumes, and we’re pleased to announce full support for these features in Docker Compose. Compose files used to describe just one thing: the services that make up your distributed application. We’ve now added networks and volumes to the mix, allowing you to describe much more complex applications. You can set up your app on your development machine with multiple network tiers and complex storage configurations, replicating how you might set it up in production. You can then take that same configuration from development,…