5.1 KiB
5.1 KiB
theme, background, title, info, class, drawings, transition, mdc
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| seriph | https://cover.sli.dev | Welcome to Slidev | ## Slidev Starter Template Presentation slides for developers. Learn more at [Sli.dev](https://sli.dev) | text-center |
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Demystifying Docker
A beginners guide to containerization and beyond
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Who am I?
Mike Conrad
- 📝 Text-based - focus on the content with Markdown, and then style them later
- 🎨 Themable - themes can be shared and re-used as npm packages
- 🧑💻 Developer Friendly - code highlighting, live coding with autocompletion
- 🤹 Interactive - embed Vue components to enhance your expressions
- 🎥 Recording - built-in recording and camera view
- 📤 Portable - export to PDF, PPTX, PNGs, or even a hostable SPA
- 🛠 Hackable - virtually anything that's possible on a webpage is possible in Slidev
Read more about Why Slidev?
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What is a container?
A method for packaging and securely running an application within an application virtualization environment. Also known as an application container or a server application container. NIST
A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another. A Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings. Docker
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Problems?
- 📝 It works on my machine?!?! - Code behaves differently in development, testing, and production due to differences in environment (OS, dependencies, configurations).
- 🎨 Dependency conflicts - Different applications require conflicting versions of the same dependency (e.g., Python 2 vs 3, different Node versions).
- 🧑💻 Slow and error-prone deployments - Traditional deployments involve manual steps or configuration drift between environments.
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Solutions
- Containers package the application and its dependencies in a consistent, isolated environment, ensuring it behaves the same everywhere.
- Containers isolate applications and their dependencies from each other and the host system, preventing conflicts.
- Containers provide predictable, repeatable, and scriptable deployments through container images.
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Problems?
- 📝 Inefficient resource usage in virtual machines (VMs) - VMs have high overhead due to running full operating systems, leading to inefficiency.
- 🎨 Difficult scalability and orchestration - Scaling applications manually is hard and error-prone.
- 🧑💻 Inconsistent development workflows - devs all have different setups, leading to inconsistent builds and bugs.
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Solutions
- Containers share the host OS kernel and are more lightweight, enabling faster startup and denser packing of applications.
- Containers integrate well with orchestrators (like Kubernetes), enabling automated scaling, rolling updates, and fault tolerance.
- Containers standardize development environments using tools like Docker Compose or dev containers.