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InfraKit and Docker Swarm Mode: A Fault-Tolerant and Self-Healing Cluster

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Back in October 2016, Docker released Infrakit, an open source toolkit for creating and managing declarative, self-healing infrastructure. This is the second in a two part series that dives more deeply into the internals of InfraKit.

Introduction

In the first installment of this two part series about the internals of InfraKit, we presented InfraKit’s design, architecture, and approach to high availability.  We also discussed how it can be combined with other systems to give distributed computing clusters self-healing and self-managing properties. In this installment, we present an example of leveraging Docker Engine in Swarm Mode to achieve high availability for InfraKit, which in turn enhances the Docker Swarm cluster by making it self-healing.

Docker Swarm Mode and InfraKit

One of the key architectural features of Docker in Swarm Mode is the manager quorum powered by SwarmKit.  The manager quorum stores information about the cluster, and the consistency of information is achieved through consensus via the Raft consensus algorithm, which is also at the heart of other systems like Etcd. This guide gives an overview of the architecture of Docker Swarm Mode and how the manager quorum maintains the state of the cluster.

Read the entire article here, InfraKit and Docker Swarm Mode: A Fault-Tolerant and Self-Healing Cluster

via the fine folks at Docker.

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Docker Docker is an open-source project to easily create lightweight, portable, self-sufficient containers from any application. The same container that a developer builds and tests on a laptop can run at scale, in production, on VMs, bare metal, OpenStack clusters, public clouds and more.

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