RancherVM Live Migration with Shared Storage

With the latest release of RancherVM, we’ve added the ability to schedule virtual machines (guests) to specific Kubernetes Nodes (hosts). This declarative placement (in Kubernetes terms: required node affinity) can be modified at any time. For stopped VMs, no change will be observed until the VM starts. For running VMs, the VM will enter a migrating state. RancherVM will then migrate the running guest machine from old to new host. Read More…

James Oliver
James Oliver
event May 29, 2018
timer Read Time: 5 minutes

Using Vagrant to Emulate Rancher Environments

I spend a large amount of my time helping clients implement Rancher successfully. As Rancher is involved in just about every vertical, I come across a large number of different infrastructure configurations, including (but not limited to!) air-gapped, proxied, SSL, HA Rancher Server, and non-HA Rancher Server. Scenario & Criteria What I wanted was a way to quickly emulate an environment to allow me to more closely test or replicate an issue. Read More…

event November 21, 2017
timer Read Time: 4 minutes

Resilient Workloads with Docker and Rancher - Part 4

Note: this is Part 4 in a series on building highly resilient workloads. Parts 1, 2, and 3 are available already online. In Part 4 of this series on running resilient workloads with Docker and Rancher, we take a look at service updates. Generally, service updates are where the risk of downtime is the highest. It doesn’t hurt to have a grasp of how deployments work in Rancher and the options available within. Read More…

event January 17, 2017
timer Read Time: 13 minutes

Container Registries You Might Have Missed

Registries are one of the key components that make working with containers, primarily Docker, so appealing to the masses. A registry hosts images that are downloaded and run on hosts in a container engine. A container is simply a running instance of a specific image. Think of an image as a ready-to-go package, like an MSI on Microsoft Windows or an RPM on Red Hat Enterprise Linux. I won’t go into the details of how registries work here, but if you want to learn more,this article is a great read. Read More…

event November 10, 2016
timer Read Time: 7 minutes

Getting Started with RancherOS

Hi, I’m Sidhartha Mani, one of the engineers at Rancher, and I wanted to provide a quick overview for how to get started using RancherOS. RancherOS is a micro-linux distribution that has the aim of providing just the right amount of OS to run Docker. It turns out, all Docker really requires to function is the kernel. RancherOS embraces this by running Docker as PID1 and everything running inside of it is a container. Read More…

event July 8, 2015
timer Read Time: 3 minutes

Setting up a scalable and highly available Wordpress environment with Rancher and Docker

Note: Rancher has come a long way since this was first published in June 2015. We’ve revised this post (as of August 2016) to reflect the updates in our enterprise container management service. Read on for the updated tutorial! Rancher supports multiple orchestration engines for its managed environments, including Kubernetes, Mesos, Docker Swarm, and Cattle (the default Rancher managed environment). The Cattle environment is rich with features like stacks, services, and load balancing, and in this post, we’ll highlight common uses for these features. Read More…

event May 21, 2015
timer Read Time: 6 minutes

Recorded May Meetup: Introduction to RancherVM

Recently, we announced RancherVM, an open source project that makes it possible to run KVM virtual machines embedded in Docker containers. Yesterday, we hosted an online meetup to demonstrate this new project and answer questions about how it works, and why you might want to use it for. We recorded that video, and have posted it here. You can download RancherVM from GitHub. If you’d like to speak to someone about how to get involved with RancherVM, please request a demonstration. Read More…

event May 14, 2015
timer Read Time: 1 minutes

Introducing RancherVM: Package and Run Virtual Machines as Docker Containers

Virtual machines and containers are two of my favorite technologies. I have always wondered about different ways they can work together. It has become clear over time these two technologies compliment each other. True there is overlap, but most people who are running containers today run them on virtual machines, and for good reason. Virtual machines provide the underlying computing resources and are typically managed by the IT operations teams. Containers, on the other hand, are managed by application developers and devops teams. Read More…

event April 16, 2015
timer Read Time: 5 minutes

Running Nagios as a System Service on RancherOS

Nagios is a fantastic monitoring tool, and I wanted to see if I could get the agent to run as a system container on RancherOS, in order to monitor the host and any Docker containers running on it. It turned out to be incredibly easy. In this blog post, I’ll walk through how to launch the Nagios agent as system container in RancherOS. Specifically, I’ll use two vagrant boxes to cover: Read More…

event April 9, 2015
timer Read Time: 6 minutes

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