Infrakit: A toolkit for creating and managing declarative, self-healing infrastructure
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Infrakit: A toolkit for creating and managing declarative, self-healing infrastructure by Bill Farner and David Chung Infrakit - https://github.com/docker/infrakit Liveblogging: http://canopy.mirage.io/Liveblog/InfraKitDDS2016
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Infrakit: A toolkit for creating and managing declarative, self-healing infrastructure
- 3. Docker for AWS EBS ELB Container Engine Storage plugin Infrastructure Management Network plugin Orchestration IAM CloudFormation EC2VPC Admin interface Linux User Applications / Services
- 4. Docker for AWS EBS ELB Container Engine Storage plugin InfraKit Network plugin Orchestration IAM CloudFormation EC2VPC Admin interface Linux User Applications / Services
- 6. Declarative • JSON configuration for desired infrastructure state: • Specification of instances — vm image, instance type, etc. • Group properties — size, logical identifiers, etc. • Design patterns encourage • encapsulation • composition • Config is input to all operations — system figures out what to do 6
- 7. Self-healing • Composed of a set of active components / processes that • monitor infrastructure state • detect state divergence • take actions • Continuous monitoring and reconciliation — always on • No downtime — rolling update 7
- 8. Toolkit • Primitives for managing collections of resources • create, scale, destroy • rolling update • Abstractions & Developer SPI • Group - manages collection of resources • Instance - describes the physical resource • Flavor - extra semantics for handling instances • A collection of executable, active components — plugins • Initially, Go daemons in the toolkit • Soon, easy management via Docker Plugins (runc)
- 9. Architecture
- 11. Operations • Make sure the plugins are running: • infrakit/group &; infrakit/zookeeper &; infrakit/vagrant &; • “Watch” the group starts management: • infrakit/cli group watch zk.conf • Update the config, e.g. change size or add IP address • Describe changes before committing — infrakit/cli group describe zk.conf • Begin update — infrakit/cli group update zk.conf11
- 12. Demo 12
- 13. Today 13 • InfraKit is just getting started… only primitives for working with groups like clusters of hosts • But we have big plans • Improve group management strategies • More resource types — networking, load balancers, storage… • A cohesive framework for active management of infrastructure — physical, virtual, or containers
- 14. Get Involved • Help define and implement new and interesting plugins • Instance plugins for different infrastructure providers • Flavor plugins for systems like etcd or mysql clusters • Group controller plugins — metrics-driven auto scaling and more • Help define interfaces and implement new infrastructure resource types — load balancers, networks and storage volume provisioners 14
- 15. More Info • Github: https://github.com/docker/infrakit • A quick tutorial: https://github.com/docker/infrakit/blob/master/docs/ tutorial.md 15
- 16. Instance Plugin • Spec: specification / model of an instance (e.g. vagrant, EC2): • Logical ID, Init, Tags, and attachment • Platform-specific properties • Methods: • /Instance.Validate • /Instance.Provision • /Instance.Destroy • /Instance.DescribeInstances • Examples: instance plugins for EC2, Azure VM, Vagrant, … 16
- 17. Flavor Plugin • Gives more context about the group members: • Size, or list of Logical ID’s (e.g. IP addresses for ‘pets’) • Application-specific notions of ‘health’ Is the node not only present but also joined a swarm? • Methods: • /Flavor.Validate • /Flavor.Prepare • /Flavor.Healthy • Examples: flavor for Zookeeper members, Docker swarm nodes 17
- 18. Group Plugin • Main entry point for user interaction: • Create, describe update, update, destroy • Config JSON is always the input • Composed of Instance and Flavor — mix and match to manage cattle (fungible) or pets (special) • Methods: • /Group.Watch • /Group.Unwatch • /Group.Inspect 18 • /Group.DescribeUpdate • /Group.Update • /Group.StopUpdate • /Group.Destroy