Learning Docker from Square One
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Being a newer technology, Docker has yet to make its way into some computer science training programs. College programs, bootcamps, and online resources have yet to jump onto the container train; so, what's the best way for newer engineers to learn Docker from square one? Chloe (former actress turned developer) tells her story about how she went from wondering "What's a Docker?" to helping teach others about Docker and instead asking "What?? You haven't heard of Docker?". This talk is perfect for anyone new to Docker looking for how to get started, or for those interested in learning how to teach Docker to new users.
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Learning Docker from Square One
- 1. Learning Docker From Square One Developer Evangelist, Codefresh Chloe Condon @chloecondon
- 3. I’m Whaley Glad You’re Here! 🐳 Me at my last DockerCon!
- 4. Our Docker journey begins… Hi, I’m Chloe!
- 7. Now a Developer Evangelist (Woo! Thanks Docker! 🎉 )
- 8. Let’s Start From the Very Beginning “A very good place to start…” @chloecondon
- 9. Images & Containers • Layers • DockerHub • Official Images • Tagging/Pushing • Dockerfiles I’ll Show You A Thing Or Two About… Volumes • Persistant data • Bind Mounting Docker Compose • yaml files • Compose commands • Building images @chloecondon
- 10. Demo Time!
- 11. Images & Containers What’s the difference? 🤔 @chloecondon
- 12. Let’s Break it Down… An image is an application you’d like to run A container is a running instance of an image @chloecondon
- 13. Let’s Break it Down… An image is an application you’d like to run A container is a running instance of an image @chloecondon
- 14. @chloecondon
- 15. Think of it this way… Image = DVD 💽 Container = DVD Player 📺 @chloecondon
- 16. Think of it this way… Docker Image = The basis of a Docker container. Represents a full application. Container = The standard unit in which the application service resides and executes. @chloecondon
- 17. @chloecondon
- 18. @chloecondon
- 19. @chloecondon
- 20. So, a container is a lightweight VM, right? @chloecondon
- 21. So, a container is a lightweight VM, right? Think of VMs like a 🏡… …and containers like an 🏢… …stay with me here! @chloecondon
- 22. So, a container is a lightweight VM, right? @chloecondon
- 23. So, a container is a lightweight VM, right? @chloecondon
- 25. So, a container is a lightweight VM, right? “Docker is not a virtualization technology, it’s an application delivery technology” -Mike Coleman @chloecondon
- 38. Tags… what’s in a name? -Shakespeare… jk @chloecondon
- 42. Dockerfiles are… …instructions… …that you need to optimize! @chloecondon
- 43. Things to consider with Dockerfiles Ephemeral ( unnecessary packages 1 container = 1 concern Minimal layers @chloecondon
- 44. @chloecondon
- 45. @chloecondon
- 46. @chloecondon
- 47. @chloecondon
- 48. @chloecondon
- 49. @chloecondon
- 50. @chloecondon
- 52. Volumes Data volumes are designed to persist data, independent of the container’s lifecycle. @chloecondon
- 54. • Host Volumes docker run -v /path/on/host:/path/in/container ... • Anonymous Volumes docker run -v /path/in/container ... • Named Volumes docker volume create somevolumename docker run -v name:/path/in/container ... Volumes @chloecondon
- 56. Docker Compose 1. Define with a Dockerfile 2. Write a docker-compose.yml 3. Run docker-compose up @chloecondon
- 57. Demo Time!
- 58. Great Resources! • Play with Docker ) • Bret Fisher’s class on Udemy * • Docker Docs 🐳 • Anything from a Docker Captain! 🚢 (docker.com/captains) • Codefresh 🍃 @chloecondon
- 59. Thank You! @chloecondon on most things! My articles on Medium cover: • Docker Basics • Volumes • Tags • & much more! Come to my Hallway Track after this! Otherwise, I’ll be chilling in the foam pit!