Docker Lahore meetup slides.

1. Docker Images & Docker
Swarm
Janshair Khan
Docker Community Leader
DevOps Engineer

2. What is an image?

3. Image formats
VHDs AMIs OVAs Boxes

4. VM Images Builders
Packer Boxfues

5. How Docker images are
different?

6. How Docker images are
different?
● Docker images only contains your application
● Images are composed of layers
● Each layer is cached in the local storage (No need to re-build)
● Layered images are built more quickly
● Each layer is created by an instruction in Dockerfile

7. How layers are organized?

8. BaseOSLayer 1

9. BaseOS
SDK | Runtime
Layer 1
Layer 2

10. App Binaries & Libraries
BaseOS
SDK | Runtime
Layer 1
Layer 2
Layer 3

11. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Layer 1
Layer 2
Layer 3
Layer 4

12. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Layer 1
Layer 2
Layer 3
Layer 4
UUID
UUID
UUID
UUID

13. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables

14. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Docker Image

15. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Changed

16. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Changed

17. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Read-Only

18. What about the
container?

19. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables

20. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Container

21. App Binaries & Libraries
BaseOS
SDK | Runtime
Application Executables
Container
Container Writable Layer

22. Demo

23. Now you have the
containers, what about
production?

24. Enter
Swarm || Kubernetes

25. How does it work?

26. 10.0.0.6 10.0.0.7
10.0.0.5
VM2 VM3
VM1
Cluster

27. 10.0.0.6 10.0.0.7
10.0.0.5
VM2 VM3
Manager
Cluster

28. 10.0.0.6 10.0.0.7
10.0.0.5
Worker1 Worker2
Manager
Cluster

29. 10.0.0.6 10.0.0.7
10.0.0.5
Worker1 Worker2
Manager
Cluster
Tasks Tasks

30. 10.0.0.6 10.0.0.7
10.0.0.5
Worker1 Worker2
Manager
Cluster
Tasks Tasks
Docker Client

31. 10.0.0.6 10.0.0.7
10.0.0.5
swarm01 swarm02
swarm00
Cluster
Tasks Tasks
Docker Client

32. 10.0.0.6 10.0.0.710.0.0.5
swarm01 swarm02swarm00
Subnet

33. 10.0.0.6 10.0.0.710.0.0.5
swarm01 swarm02swarm00
Subnet
Ingress Overlay

34. Demo