2017/03/21

1. docker with
Visual Studio 2017
Tokyo .NET Developers Meetup #20 - 2017-3-21
@tanaka_733

2. Who is @tanaka_733?
Working for Red Hat K.K.
◦ Responsible for .NET Core on RHEL, Red Hat on Azure and OpenShift
◦ OpenShift: Container Platform as a Service. “Enterprise” kubernetes
◦ kubernetes: one of docker orchestration platform
Microsoft MVP for Visual Stduio and Development Technologies
◦ Recent Target: .NET Core on Linux, C# 7.0, Linux on Azure
SQL Server on Linux
◦ Blogs: Red Hat Developers
https://medium.com/@tanaka_733/

3. Takeaways
What is the docker?
Getting Started docker for Windows
Getting Started ASP.NET Core on docker with Visual Studio 2017

4. What’s docker?
Like a Virtual Machine
Linux OS
isolation tools
Faster to launch.

5. VM and docker
Host Hardware
Host Linux OS
Hypervisor
VM
Virtual HW
Guest OS
Process
Process
Process
VM
Virtual HW
Guest OS
Process
Process
Process
Host Hardware
Host Linux OS
Process
Docker Engine
Container
Process
Container
Process

6. docker and Windows
Docker for Windows
◦ Supporting Linux Docker
◦ Working with Hyper-V (required Windows 10 Pro/Enterprise/Education)
◦ Running docker host Linux OS as a Hyper-V guest VM
◦ If not satisfy, you can use docker toolbox (VirtualBox)
Windows Server Container & Hyper-V Container
◦ Container technology for Windows
◦ Windows Server Container: lightweight, run as a host OS process
◦ Hyper-V container: high isolation, run as a process in Hyper-V guest VM

7. Docker for Windows
https://docs.docker.com/docker-for-windows/install/

8. Getting Started docker for Windows
Launch powershell (or cmd), then you have been already able to run docker commands.

9. Run docker image

10. Connect into the container

11. Port mapping (run Web Server)

12. Kitematic

13. Visual Studio 2017 & docker
Visual Studio 2015
◦ supporting docker by Visual Studio extension
◦ docker tools for VS
◦ This extension will be open sourced.
Visual Studio 2017
◦ supporting docker without extension

14. Getting Started with Visual Studio 2017

15. docker-compose project
Dockerfile
Base ASP.NET Core project
docker-compose project
(supporting docker debug)

16. Dockerfile example
FROM microsoft/aspnetcore:1.1.1
ARG source
WORKDIR /app
EXPOSE 80
COPY ${source:-obj/Docker/publish} .
ENTRYPOINT ["dotnet", "DockerExample.dll"]
Base Docker image
Pass the argument during build
Specify Working Directory
Expose the port to listen
Copy local binary into docker
Specify the command to run
You have to build your app before docker build.
$ dotnet publish -c Debug

17. What’s docker-compose?
Compose is a tool for defining and running multi-container Docker applications.
◦ https://docs.docker.com/compose/overview/
The generated compose file is a starting point.
◦ A single container for debugging and releasing.
◦ You can add more containers to require your app.
◦ e.g. Add database container, redis container etc…

18. docker compose example
services:
dockerexample:
image: dockerexample:dev
build:
args:
source: ${DOCKER_BUILD_SOURCE}
environment:
- DOTNET_USE_POLLING_FILE_WATCHER=1
volumes:
- ./DockerExample:/app
- ~/.nuget/packages:/root/.nuget/packages:ro
- ~/clrdbg:/clrdbg:ro
entrypoint: tail -f /dev/null
labels:
- "com.microsoft.visualstudio.targetoperatingsystem=linux"
image name
pass the ARG into Dockerfile
Environment Variables
Mount a volume.
Volume source is host OS (Windows)

19. Debug with docker

20. Debug with docker
tail -f /dev/null : run forever
/clrdbg/clrdbg : remote debugging
/usr/bin/dotnet : Application process

21. Remote debug mechanism (general)
22
GDB/LLDB
MICore
MIDE/Engine.Impl
MIDE/AD7.Impl
VSCode Debugger
AD7 Interface
MIDE: MIDebugEngine
MIText
VS Debugger
VS Debugger
Engine clrdbg
from MIEngine
WINDBG

22. Remote debug mechanism
23
clrdbg
AD7 Interface
VS Debugger
over SSH

23. Deploy to the Azure App Service on Linux
What’s App Service on Linux?
◦ Linux version of App Service
◦ App Service is so called “PaaS”
How to deploy?
◦ Deploy from Visual Studio directory.
◦ Use App Service source code integration.
◦ Commit code => App Service pulls code and builds it on its cluster.
◦ Creating docker image and deploy the image.
◦ Commit code => Build a docker image => push the image to private docker registry => app service pull the image

24. Deploy to the Azure App Service on Linux

25. docker build/deploy example
build process
SCM container registry
deploy process
docker host

26. Do you want to deploy to other?
Azure Container Services
◦ Easy to start your own orchestration cluster in Azure. Supporting kubernetes, DC/OS and Docker swarm
Google Container Engine
◦ kubernetes base
Amazon ECS
◦ container platform by Amazon. integrated with other Amazon services.
And many other orchestration tools…
OpenShift by Red Hat
◦ “Enterprise” kubernetes
◦ Adding features to kubernetes: project, build from source, routing and so on.