We Celebrated the Launch of Docker Enterprise 3.0 and Docker 19.03 Last WeekLast week, Docker Captain Bret Fisher hosted a 3-day Release Party for Docker 19.03 and Docker Enterprise 3.0. Captains and the Docker team demonstrated some of their favorite new features and answered live audience questions. Here are the highlights (You can check out the full release party here).
Docker Desktop Enterprise
To kick things off, Docker Product Manager Ben De St Paer-Gotch shared Docker Desktop Enterprise. Docker Desktop Enterprise ships with the Enterprise Engine and includes a number of features that makes enterprise development easier and more productive. For example, version packs allow developers to switch between Docker Engine versions and Kubernetes versions, all from the desktop.
For admins, Docker Desktop Enterprise includes the ability to lock down the settings of Docker Desktop, so developers’ machines stay aligned with corporate requirements. Ben also demonstrated Docker Application Designer, a feature that allows users to create new Docker applications by using a library of templates, making it easier for developers in the enterprise to get updated app templates – or “gold standard” versions like the right environment variable settings, custom code, custom editor settings, etc. – without a dependency on central IT.
Docker Captain Sujay Pillai shared the power of Buildx, the next generation image builder. Docker Buildx is a CLI plugin that extends the Docker command with the features provided by Moby BuildKit builder toolkit. It supports the features available for
docker build including the new features in Docker 19.03 such as outputs configuration, inline build caching or specifying target platform. In addition, Buildx supports new features not yet available for regular
docker build like building manifest lists, distributed caching, exporting build results to OCI image tarballs, creating scoped builder instances, building against multiple nodes concurrently etc.
Buildx is an experimental feature, meaning Docker is providing early access to the feature for testing and feedback purposes, but it is not yet supported or production ready. Buildx is included in Docker 19.03, Docker Desktop Enterprise version 2.1.0 and Docker Desktop Edge version 188.8.131.52 or higher. (Side note: The Buildx plugin in these versions supersedes the old environment variable for Buildkit and it does not require
DOCKER_BUILDKIT=1 environment variable for starting builds.)
You can download Buildx here and catch Sujay’s demo here:
Docker Director of Engineering Joe Abbey introduced and demonstrated Docker Cluster, a newly released command line tool in Enterprise 3.0 that greatly simplifies managing the lifecycle of server clusters on AWS. Docker Cluster for Azure will be released later this year. Commands include: backup, create, inspect, list all available, restore, remove, update, and print version commit and build type. Check out the demo below:
Docker Captain (and co-creator of Play with Docker and Play with Kubernetes) Marcos Nils demonstrated context switching within the command line, available in 19.03. Users can now create contexts for both Docker and Kubernetes endpoints, and then easily switch between them using one command. To create contexts, you can copy the host name whenever you set up a new context or copy the context information from another context.
Docker Context removes the needs to have separate scripts with environment variables to switch between environments. To find out what context you are using, go to the Docker command line. The command line will show both the default stack (i.e. Swarm or Kubernetes orchestrator) and the default context you have set up.
Try it out now using Docker 19.03 and Play with Docker, as demonstrated by Marcos in this video:
Rootless functionality allows users to run containers without having root access to the operating system. For operators, rootless Docker provides an additional layer of security by isolating containers from the OS. For developers, rootless Docker means you can run Docker on your machine even when you don’t have root access. Docker Captain Dimitris Kapanidis demonstrates how to install rootless Docker in this video:
Docker App is based on Cloud Native Application Bundles (CNAB), the open source, cloud-agnostic specification for packaging and running distributed applications. That makes it easy to share and parameterize apps by making your Docker Stack and Compose files reusable and shareable on Docker Hub. With the 19.03 release, you now get two binaries of Docker App: 1) A command line plug-in that enables you to access Docker App from a single command and 2) The existing standalone CLI install for Docker App.
Below, Docker Captain Michael Irwin demonstrates Docker App’s ability to parameterize anything within the compose files except for the image. In other words, with Docker App you can easily define the ports you want to expose, how many replicas, what CPU memories to give to the app and more.
Want to learn more about how these all work in Docker Enterprise 3.0? Join us for our upcoming webinar series on driving High-Velocity Innovation with Docker Enterprise 3.0.
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