Docker Clustering Approaches

Architecture, Docker, Swarm / / , , , , ,

Most enterprises have a structured release management process that allows phased deployment between multiple environments including development, test, model (stage or acceptance), and production.  https://en.wikipedia.org/wiki/Deployment_environment.

With Docker Enterprise Swarm you can generally setup these environments in one of the following ways: Single Cluster, Multi-Env Cluster, Geo-Single Clusters, and Geo-Multi-Env Cluster.  I will explain these different approaches and help you determine when each approach might be useful in your enterprise.  Of course, there is a myriad of variations on each of these that you could employ to suit your own needs.
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Docker Layer 7 Routing – Host Mode

Docker, Swarm / / , , , , ,

It’s been nearly 3 months since my last blog about new the Layer 7 Routing (aka Interlock) in Docker Enterprise 2.0. It’s been a journey of up’s and down’s to get this to work, scale, and become stable enough for a production environment. I’m not sure we can declare total success just yet.

Near the end of my previous blog post I mentioned that there is an alternative configuration for Interlock regarding overlay networks. You could utilize Interlock’s host mode networking. Docker states the following:

By default layer 7 routing leverages the Docker Swarm routing mesh, but you don’t have to. You can use host mode networking for maximum performance.

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First Year at Capstone

Business, Working at Capstone / / , , , , , , , , , , , ,

Last month I finished my first year working part time at Capstone. That’s long enough to feel like you know a company, and still short enough to be new. I’ve been reflecting about the differences to my 36 years working full time at IBM (38 years if you count my part time student work there.) This is NOT a technical blog post.  …

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Interlock for Docker Swarm

Docker, Swarm / / , , , , , , ,

In early 2018 Docker made an announcement of the release of its newest Docker Enterprise 2.0 product.  This newest release provides a significant advancement in the Docker platform in the form of a choice between Swarm and/or Kubernetes orchestration. But that’s not what i want to talk about.

Layer 7 Routing

Another great addition to the platform is the replacement of the HTTP Routing Mesh, known as HRM, with a new Layer 7 routing and load balancing. This latest enhancement is built upon the new Interlock 2.0 architecture which provides a highly scalable and highly available routing solution for Swarm.  Interlock provides the same functionality as HRM but also includes 2 new features: 1) path based routing and 2) SSL termination.
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Zero Downtime Deployment with Docker Rolling Updates

3 Comments / Docker / / , , , ,
When configuring a Docker environment before a big rollout to production, it’s important to understand what “zero downtime deployment” really means and if it is what it claims. This requires an understanding of the intricacies of how a rolling update works.
So let’s look at what “zero downtime deployment” actually means. Most people don’t want to specify and arrange a maintenance window and have to kick people off just to roll out a new version of an application. This is a problem that Docker Enterprise Edition solves by providing an approach referred to as “rolling updates.”
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