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An Introduction to Vagrant and Docker
The document is an introduction to Vagrant and Docker, detailing their functionalities, components, and use cases. Vagrant is a CLI tool for managing virtual machine environments, while Docker simplifies the deployment of Linux containers. Both tools enhance the efficiency of development and deployment processes in software environments.
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An Introduction to Vagrant and Docker
- 1. An Introduction toVagrant and Docker Scott Lowe http://blog.scottlowe.org
- 2. Before we begin ☞Get involved! Audience participation is requested and encouraged. ☞ If you use Twitter, feel free to tweet about this session (use @NashvilleVMUG or hashtag #NashvilleVMUG) ☞ Feel free to take photos or videos of today's session and share them online ☞ A PDF copy of this presentation will be available online after the event
- 4. What is Vagrant? ☞A CLI-based tool for streamlining the use of VM environments (creation, provisioning, usage, & decommissioning) ☞ Available from http://www.vagrantup.com
- 5. A "VM environment"? ☞Think of this as one or more VMs (based on a user-specified template) along with networking and possible in-guest software customization ☞ Examples ☞ The classic "3 tier" web/app/DB topology ☞ Trying out new technologies (CoreOS and etcd cluster, Open vSwitch)
- 6. Use cases forVagrant ☞ Sharing VM environments with other users ☞ Accelerating the creation of VM environments ☞ Automating software provisioning inside VM environments ☞ Providing a CLI for creating/destroying/accessing VM environments
- 7. What are thecomponents of Vagrant?
- 8. Vagrant ☞ Written inRuby ☞ Multi-platform (Windows, Linux, OS X) ☞ CLI (no GUI)
- 9. Vagrant provider ☞ Interfaceswith back-end virtualization solution ☞ Vagrant comes with a provider for VirtualBox ☞ Provider for VMware desktop products (Fusion & Workstation) available for a fee ☞ Other providers available as open source projects ☞ See https://github.com/gosddc for examples
- 10. Vagrant box ☞ Templateused when creating VM environments in Vagrant ☞ Boxes are provider-specific ☞ Packer is a related product that can be used to help build Vagrant boxes
- 11. Vagrantfile ☞ A textfile (written with Ruby syntax) that describes the VM environment
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- 14. What is Docker? ☞A CLI tool for simplifying the use of Linux containers ☞ Available from https://www.docker.com
- 15. What are Linuxcontainers? ☞ Linux containers can be thought of as "lightweight virtualization" or "OS virtualization" ☞ Leverage features built into the Linux kernel (cgroups and namespaces) ☞ Linux containers have been around for a while, but weren't very easy to use
- 16. Use cases forDocker ☞ Rapidly deploy (or un-deploy) containers ☞ Simplify the creation of custom container images ☞ Make sharing container images very easy
- 17. What are thecomponents of Docker?
- 18. Docker daemon ☞ Responsiblefor spawning containers ☞ As a daemon, it runs in the background ☞ By default, listens on a local Unix socket (can be configured to listen on a network port)
- 19. Docker client ☞ CLIclient for interacting with the Docker daemon ☞ Can run locally on the same system as the daemon, or remotely (daemon must be listening on a network port)
- 20. Docker image ☞ Thecontents of a Docker container ☞ Comprised of multiple filesystem layers ☞ Stored locally, can be shared via the Docker Hub ☞ Images can be based on other images
- 21. Dockerfile ☞ A simpletext file describing a Docker image
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- 26. Thank you! Be sureto provide feedback to the VMUG leaders regarding this session. Blog: http://blog.scottlowe.org Twitter: @scott_lowe GitHub: https://github.com/lowescott Life: Colossians 3:17