Docker First Steps
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Docker provides a lightweight container platform that allows applications to run isolated on the same host machine. It uses a layered image format and central repository called Docker Hub to distribute container images. Containers are more portable and faster to deploy than virtual machines, though they have some limitations around networking and security compared to VMs. Tools like Kubernetes help manage Docker containers in production environments.
Docker First Steps
- 2. First Steps
- 3. What’s Docker? • API to provide lightweight containers • Opensource platform • Run process isolated in the same host • It helps to deploy, ship, test, etc. in a fast way
- 4. How it works
- 5. How it works
- 6. How it works • Dockerfile: set of instructions to build a docker image. Every instructions creates a new layer and it is assigned to a hash, like a git commit • Docker Hub: Central repository where docker images are stored
- 7. Docker is NOT a Virtual Machine
- 8. Docker vs. Virtual Machines Virtual Machine
- 9. Docker vs. Virtual Machines Docker containers
- 10. Advantages • High level abstraction for containers • Fast to create images • Fast to deploy • Reduce time between development and deployment • Possible to have several environments isolated in the same host
- 11. Example
- 12. So… Docker is AWESOME!!!!111
- 13. Well… Not that awesome…
- 14. Disadvantages • Networking limitations • No support for IPv6 • Uses NAT • Insecure (Trust Docker Hub) • No support for old kernels • Not easy to debug And more… http://www.boycottdocker.org
- 16. Tools • CoreOS, RancherOS, boot2docker • Kubernetes • Docker Machine • Docker Compose • Kitematic
- 17. Questions?