### Docker: A Better Way for Dependencies --- ### What I want to talk about - What is Docker<!-- .element: class="fragment" data-fragment-index="1" --> - What it gives you as a developer<!-- .element: class="fragment" data-fragment-index="2" --> - And a Demo<!-- .element: class="fragment" data-fragment-index="3" --> ---- ### What is Docker The complicated part! ---- > A container image is a lightweight, stand-alone, executable package of a piece of software that includes everything needed to run it: code, runtime, system tools, system libraries, settings. Note: - This is long winded   - Show don't tell ----  Note: - This is a computer - Each section is independent of each other - THESE ARE NOT VM --- ### Why you should Care ---- #### Docker - Don't need to install anything on your machine - Can use conflicting versions - No Clean Up - Simple Script to build custom images ---- #### Docker Compose - Scriptable Enviroments - Easily shared - Easily changed - Simple commands --- ## Demo ---- ### Docker Command ``` bash docker run -it --rm --name redbrick\ SECRET_API_TOKEN='somethingThatMustChange'\ RECAPTCHA_SITE_KEY='redbrickIsGreat'\ RECAPTCHA_SECRET_KEY='totalySecretKey'\ LOG_ROTATE='24h'\ -p 3000:3000 redbrick/site ``` ---- ### Docker Compose ``` yaml version: "3" services: redbrick: image: 'redbrick/site:latest' restart: 'always' ports: - '3000:3000' environment: SECRET_API_TOKEN: 'somethingThatMustChange' RECAPTCHA_SITE_KEY: 'redbrickIsGreat' RECAPTCHA_SECRET_KEY: 'totalySecretKey' LOG_ROTATE: '24h' ``` ---- #### Try it live? --- ## Further Reading - [docs.docker.com/compose/compose-file](https://docs.docker.com/compose/compose-file/) - [hub.docker.com](https://hub.docker.com/) - [docs.docker.com/engine/tutorials](https://docs.docker.com/engine/tutorials/) - [video.fosdem.org](https://video.fosdem.org) ---- #### Questions?