Migrating apps out of Virtual Machines is difficult, especially distributed apps with multiple components, and even more so when the components run on different operating systems. But with the Docker platform and the Image2Docker tools - which extract Linux and Windows apps from existing VMs into containers - it's easy. In this session we'll take a PHP front-end application running in a Linux VM, which connects to a .NET Web Service running in a Windows VM, and convert the whole stack to Docker automatically. Then we'll run the app on a hybrid Docker Datacenter cluster, where we can manage the Windows and Linux components from a single pane of glass.

1. Jeff Nickoloff
Independent Software Engineer,
Docker Captain
Elton Stoneman
Developer Advocate,
Docker, Inc.
Escape From Your VMs with Image2Docker

2. (But we have a solution)
We have a problem

4. Should we solve it like this?
Lift-and-shift has its own problems
• Wouldn’t learning Docker be easier?
• Container best practices?
• What are the use-cases?

5. • Targeted
• Open source
• Extensible
Image2Docker

6. Lift-and-shift is hard
Tooling
• Security – are there secrets in the VM?
• Content – do we need to lift *everything*?
• Config explosion – how many init systems?
• Validation – can we automate the testing?

7. Discovery.
Extraction.
Provisioning.
Generation.
Image2Docker
Ubuntu
Apache
My SQL
PHP

8. Discovery.
Extraction.
Provisioning.
Generation.
Image2Docker
Ubuntu
Apache
My SQL
PHP
Windows
IIS
.NET
ASP.NET

9. 2 VMs.
2 operating systems.
2 app stacks.
2 deployment
models.
2 admin models.
Current State

10. 1 Docker swarm.
1 platform.
1 set of artifacts.
1 deployment model.
1 admin model.
Desired State

11. Part 1: Migration
1. Check out the app
2. I2D for Windows
3. I2D for Linux
Agenda
Part 2: Deployment
1. Create hybrid swarm
2. Deploy services
3. Relax

12. Demo:
Working on the app

13. make prepare
make build
make builtin-prep
sudo bin/v2c-darwin64 build -n img.vmdk
Image2Docker - Linux

14. Demo:
Image2Docker -
Linux

15. Install-Module Image2Docker
Import-Module Image2Docker
ConvertTo-Dockerfile `
-ImagePath c:iis.vhd `
-OutputPath c:i2d2iis `
-Artifact IIS
Image2Docker - Windows

16. Demo:
Image2Docker -
Windows

18. w3wp.exe

19. w3wp.exe httpd

20. Manager Worker Worker

21. GET è
è

22. Demo:
Hybrid Docker swarm

23. Lift & shift
• I2D for Linux
• I2D for Windows
• Starter for 10
Summary
Hybrid swarm
• Host diversity
• App diversity
• Single interface

24. It’s OSS – join in!
@docker #dockercon @allingeek @EltonStoneman
dockr.ly/i2d-linux
dockr.ly/i2d-win