After completing this course, you will be able to: Describe what Docker swarm mode can accomplish. In this course, we’ll explain the architecture of Docker swarm mode, and go through lots of demos to perfect your swarm mode skills. Docker swarm mode is one such tool.
Docker Swarm Mode Mac OS XIn the following steps well be running each Docker container in detached mode.Swarm, aka SwarmKit aka Swarm Mode, aka Swarm Services is alive and well.The TL DR direct quote from Docker blog after the 2017 Kubernetes announcement: "But it’s equally important for us to note that Swarm orchestration is not going away. If youre running on Windows or Mac OS X, youll need to use Docker. When you run the Docker in swarm mode. When you run Docker without using swarm mode, you execute container commands. The Docker Engine CLI and API include commands to manage swarm nodes (e.g., add or remove nodes), and deploy and orchestrate services across the swarm.Please allow me to be a fan of Swarm and Kubernetes at the same time! □ I believe a healthy container ecosystem should have multiple viable options for the layers of our server stack.There have been people, in their love and excitement for Kubernetes, that have claimed that Swarm is dead, and being "replaced" by Kubernetes in Docker EE. Each tool has its ideal user, and one size doesn't fit all (for any tool). Yes I'm biased.This does not mean I think it's always better than other options like Kubernetes and Mesos. Since it's launch in 2016. It's been the default orchestrator in Docker's Enterprise Edition for the last 1.5 years and used by many hundreds of their big customers, and many more in the free Docker CE edition.I spend my days helping companies implement Swarm, and I teach Docker 101 and Swarm courses on the internet and in real-world workshops. It's an amazingly easy container orchestrator built right into the Docker CLI and engine.Current Docker EE customers were quite happy with Swarm, and weren't looking for the "exit" to Kubernetes. That same week, when I and the rest of the Docker Captains got to sit down with some of the lead engineers, product managers and Solomon himself (Docker founder), one thing was made clear. Pretty clear right?Docker: Now Powered by Swarm and KubernetesBut, they were so committed to that statement, that they wrote a whole article about it. Maybe this was to help thwart the confusion around Swarms future, I don't know. Docker clarified/ stated after the Kubernetes integration announcement that Swarm is a key part of their Docker Enterprise Edition. This meant that customer teams using Kubernetes didn't have to choose one or the other, they could use both together.Docker EE would then give you multiple orchestrator choices and obtain that holy grail of a consolidated "single pane of glass" for container management and security that businesses love in their infrastructure. Docker started working with the Kubernetes maintainers to integrate a pure upstream version of Kubernetes into Docker EE as a new 3rd orchestrator option. Here's a list of new features affecting Docker's cluster tech over last 3 years that I've collected as I use them in every. 23 PR's in the last month (March 2018). See how active SwarmKit still is on GitHub (which is just one of the repo's that affects Swarm Mode features). Openness and choice create a healthier ecosystem for everyone.— Solomon Hykes DecemDocker Founder says they will support Kubernetes and Swarm Docker will continue to support both Kubernetes and Swarm as first-class citizens, and encourage cross-pollination. CTO of Docker Solomon Hykes restates it in a tweet.No. Until Docker Enterprise Edition 2.0 is released, there is no Kubernetes option for current Docker EE customers, meaning that the existing 450+ customers paying for Docker EE (that are choosing to use orchestration) are using the two existing orchestrators that EE has supported, starting with Swarm "Classic" in 2015 (which it still supports aka "Basic Containers") and Swarm (aka "Swarm Services") in 2016. Swarm is easy today to deploy and secure out of the box with regard to node auth and mgmt protocols, so it makes sense that it would be used to help tighten down Kubernetes during node initial creation. It's part of the core tooling for how Docker EE automates setup and management of nodes. Many documents, DockerCon talks, and GitHub issues after that state that Swarm is used to provision and manage Kubernetes nodes in a secure way. As of 2.0, it will support 3. Choice of the underlying OS, choice of cloud or hardware, choice of Orchestrator. Docker's EE marketing focuses on choice. Docker blogs on new features coming to Swarm in Docker EE 2.0.NOTE: The Docker Cloud shutdown was not related to Swarm Mode. You can have all three orchestrators running in the same Docker EE cluster. Kubernetes is a choice you can make when you want to when deploying stacks (multi-container multi-tier solutions). In Docker EE 2.0, Swarm Mode is still the default orchestrator in the "choose your orchestrator" drop-down. It still gets commits! There are also still edge cases that Swarm Classic might support which Swarm Mode does not yet. Are You Convinced?In the end, I don't speak for Docker. It's too bad, as it was way easier to use for deploying a Docker CE cluster in AWS then the manual alternative. I have no insider info on this, just "reading the tea leaves" of Docker Clouds overall usage in my community of customers, other Docker Captains, and my students. To me, that shutdown was about focusing on their EE product and "trimming the fat" of various tools they've tried to market that (I'm guessing) just didn't take off. Visual studio for mac c 71I do hope you take Docker Swarm for a spin, and let me know on Twitter what you think and what tools you've decided to use. The "best" to you might just be the one you know well, the one you can afford, or the one that government standards required you to use (see Docker's standards and compliance). So the future is not written in stone.I want you to choose the best orchestrator for your team. I'm writing this in April 2018, right before Docker Enterprise Edition 2.0 is released with Kubernetes support.
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