Cross-posted on Medium On Wednesday April 24th, Docker announced a partnership with Arm to help accelerate adoption of containers into the massive Arm ecosystem. Today at DockerCon San Francisco 2019, Docker is releasing a tech preview of improved...
Engineering
Registry v1 API Deprecation
Docker will be disabling pulls via the registry v1 APIs on Docker Hub on June 1 2019. Pushes to Docker Hub via the registry v1 API have been disallowed since November 2015, and pulls via the registry v1 API can only be performed via Docker Clients 1.12 and below. Our...
Addressing Time Drift in Docker Desktop for Mac
Docker Desktop for Mac runs the Docker engine and Linux containers in a helper LinuxKit VM since macOS doesn’t have native container support. The helper VM has its own internal clock, separate from the host’s clock. When the two clocks drift apart then suddenly...
So, when do you use a Container or VM?
Recently I was giving a talk at a trade show on the basics of Docker, and how an application goes from an idea to being a production workload running on a Universal Control Plane managed Swarm cluster. As part of that talk, I spent a bit of time talking about how...
To Use Physical Or To Use Virtual: That is the container deployment question
I have had a version of the following conversation more than a few times with community members trying to sort out where to run their containerized apps in production: User: So, where should I run my containers? Bare metal or VM’s Me: It’s not a question of “either /...
There’s Application Virtualization and There’s Docker
In what appears to be a recurring theme (which I promise I’ll move off of soon), I’m going to spend some time talking about what Docker isn’t - Docker is not application virtualization. I spent a good amount of time at VMware where I worked on VMware View (which begat...
Containers and VMs Together
A couple weeks back I talked about how Docker containers were not virtual machines (VMs). I received a lot of positive feedback on the article (thanks!), but I also heard a common question: Can VMs and Docker containers coexist? The answer is a resounding “yes.” At...
Containers are not VMs
I spend a good portion of my time at Docker talking to community members with varying degrees of familiarity with Docker and I sense a common theme: people’s natural response when first working with Docker is to try and frame it in terms of virtual machines. I can’t...