Build Stuff'16 Lithuania

Distributed Cluster Schedulers are becoming increasingly popular. They present a good abstraction for running workloads at a “warehouse-scale” on the public and private clouds by decoupling workload from compute, network and storage resources.

In this talk, we will talk about the operational challenges of running a Cluster Scheduler to serve highly available services across multiple geographies and in a heterogeneous runtime environment. We will go into details of the needs from a cluster scheduler with respect to managing multiple runtime/virtualization platforms, provide observability, running maintenance on hardware and software, etc.

The audience is going to be introduced to Nomad, a globally aware, distributed scheduler designed to handle any type of workload on any operating system. We will talk how Nomad solves the problems described above

Everybody is now using virtualization, containers are all the rage today, and microkernels start to gain traction… But how is all this working? How did these solutions come to be? What are the differences between containers and virtual machines? Where and why should you use docker, runc, rocket, kvm, xen, virtualbox, includeOS, rancherOS? This talk is a full session providing understanding on how these technologies work, how they compare to each other, and lot’s of demo to understand differences and fundamental concept on isolation. So, let’s look under the hood, and understand how your system works (hint: it’s not magic). And yes, it will be understandable even if you are not an OPS or an expert. That’s precisely the point.

It's way too easy to get caught into a path of 'I must be doing it wrong, everyone else seems to understand all this technology, and I don't get it'. The problem is that's wrong. We also have an obsession with 'you must be working on the right things!' And in order to learn how to put everything together, you need to practice. So, work on the wrong things first.

Docker started small and got big in really short time. Believe it or not, you can learn to build your version of it too, within the duration of a conference talk! In the talk, we will assemble and run a Docker-like container with only standard command-line tools found in modern Linux distributions. First half of the presentation will cover the facilities Linux provides for Docker to build upon: cgroups, pid and network namespaces, overlay file systems. During the second half we will put theory to practice in a terminal session. At the end of the talk we will not only be armed with knowledge how to build an isolated container, but also have an actual container running. After the talk, you will have a good insight how Docker works, and understand how you could use its building blocks to build something that perfectly matches your environment. You’ll get most out of this session if you are comfortable in Linux terminal, for instance, configuring networking from command-line. Knowledge about Pid namespaces, cgroups or overlay filesystems is not required. You will learn it all that during the talk.