Docker for .NET Developers - Michele Leroux Bustamante, Solliance
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This document discusses how Docker can help .NET developers by allowing them to containerize their .NET applications. It provides benefits like running applications across Windows and Linux containers, improving development workflows through features of Docker for Windows like Linux containers on Windows, and facilitating continuous integration and deployment of containerized applications through automation. The document provides examples of Dockerfiles for different types of .NET applications and demonstrates how to add Docker support and containerize existing applications using Visual Studio tools.
![FROM microsoft/aspnetcore:1.1
ARG source
WORKDIR /app
EXPOSE 80
COPY ${source:-obj/Docker/publish} .
ENTRYPOINT ["dotnet", “WebApi.dll"]
Demo Linux](https://image.slidesharecdn.com/dockerfor-170428154648/85/Docker-for-NET-Developers-Michele-Leroux-Bustamante-Solliance-17-320.jpg)
![FROM microsoft/aspnetcore:1.1-nanoserver
ARG source
WORKDIR /app
EXPOSE 80
COPY ${source:-obj/Docker/publish} .
ENTRYPOINT ["dotnet", “WebApi.dll"]
Demo Windows](https://image.slidesharecdn.com/dockerfor-170428154648/85/Docker-for-NET-Developers-Michele-Leroux-Bustamante-Solliance-18-320.jpg)
![# Enable DNS resolution to work properly for all windows containers
# instead of caching (temporary fix)
SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
RUN set-itemproperty -path
'HKLM:SYSTEMCurrentControlSetServicesDnscacheParameters' -Name
ServerPriorityTimeLimit -Value 0 -Type Dword
# see music store sample
# https://github.com/docker/labs/blob/master/windows/windows-
containers/MultiContainerApp.md
DNS Resolution Reference](https://image.slidesharecdn.com/dockerfor-170428154648/85/Docker-for-NET-Developers-Michele-Leroux-Bustamante-Solliance-26-320.jpg)
![FROM microsoft/aspnet
ARG source
WORKDIR /inetpub/wwwroot
COPY ${source:-obj/Docker/publish} .
ENTRYPOINT ["powershell", "./bootstrap.ps1"]
Environment Variables and IIS](https://image.slidesharecdn.com/dockerfor-170428154648/85/Docker-for-NET-Developers-Michele-Leroux-Bustamante-Solliance-27-320.jpg)
![# copy process environment variables machine-wide
foreach($key in [System.Environment]::GetEnvironmentVariables('Process').Keys) {
if ([System.Environment]::GetEnvironmentVariable($key, 'Machine') -eq $null) {
$value = [System.Environment]::GetEnvironmentVariable($key, 'Process')
[System.Environment]::SetEnvironmentVariable($key, $value, 'Machine')
}
}
Bootstrap.ps1
REFERENCE: Elton Stoneman
https://github.com/sixeyed/nerd-dinner/blob/dockerize-part2/docker/web/bootstrap.ps1](https://image.slidesharecdn.com/dockerfor-170428154648/85/Docker-for-NET-Developers-Michele-Leroux-Bustamante-Solliance-28-320.jpg)
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Docker for .NET Developers - Michele Leroux Bustamante, Solliance
- 1. Docker for .NET Developers Michele Leroux Bustamante CIO / Cloud/Security Architect Solliance Microsoft Regional Director, MVP Azure Docker Captain @michelebusta
- 2. • Microservices architecture • Faster releases • Polyglot • Improved development workflows • Devops culture • Better resiliency Why Docker?
- 3. • Run .NET Framework applications in Windows containers • Limited changes • Encapsulate configuration and dependencies • Refactor the monolith at your own pace • Create new dotnetcore / aspnetcore applications • Target Linux or Windows containers • Familiar development experience / debugging .NET Developer Benefits
- 10. Docker for Windows Powershell Developer Tools
- 11. Docker for Windows provides a Linux VM for local execution of Docker containers. Linux / Windows
- 12. Docker for Windows provides a Linux VM for local execution of Docker containers. Can verify mode. Can swap between modes from the task tray. Linux / Windows
- 13. Docker for Windows provides a Linux VM for local execution of Docker containers. Can verify mode. Can swap between modes from the task tray. Linux / Windows
- 14. Docker for Windows Powershell Visual Studio 2017 Developer Tools
- 15. Development Considerations • Target environments and base image • Debugging • Access to logs • Service dependencies and networking • Environment variables • CICD workflows
- 16. Project -> New with Docker
- 17. FROM microsoft/aspnetcore:1.1 ARG source WORKDIR /app EXPOSE 80 COPY ${source:-obj/Docker/publish} . ENTRYPOINT ["dotnet", “WebApi.dll"] Demo Linux
- 18. FROM microsoft/aspnetcore:1.1-nanoserver ARG source WORKDIR /app EXPOSE 80 COPY ${source:-obj/Docker/publish} . ENTRYPOINT ["dotnet", “WebApi.dll"] Demo Windows
- 20. Add Docker to existing dotnetcore or .NET Framework projects. Creates Dockerfile and Docker project with compose files ready for debugging. Add Docker
- 21. services: webapp: image: webapp build: context: ./src/WebApp dockerfile: Dockerfile webapi: image: webapi build: context: ./src/WebApi dockerfile: Dockerfile DEMO Add Docker
- 22. services: webapp: image: webapp build: context: ./src/WebApp dockerfile: Dockerfile environment: - "Api:BaseAddress=http://webapi" DEMO Environment Variables
- 24. FROM microsoft/aspnet ARG source WORKDIR /inetpub/wwwroot COPY ${source:-obj/Docker/publish} . DEMO Legacy Migration
- 25. services: snapboard.web: image: snapboard.web … depends_on: mssql: condition: service_healthy mssql: image: microsoft/mssql-server-windows-developer … DEMO Compose Up Developer Love
- 26. # Enable DNS resolution to work properly for all windows containers # instead of caching (temporary fix) SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"] RUN set-itemproperty -path 'HKLM:SYSTEMCurrentControlSetServicesDnscacheParameters' -Name ServerPriorityTimeLimit -Value 0 -Type Dword # see music store sample # https://github.com/docker/labs/blob/master/windows/windows- containers/MultiContainerApp.md DNS Resolution Reference
- 27. FROM microsoft/aspnet ARG source WORKDIR /inetpub/wwwroot COPY ${source:-obj/Docker/publish} . ENTRYPOINT ["powershell", "./bootstrap.ps1"] Environment Variables and IIS
- 28. # copy process environment variables machine-wide foreach($key in [System.Environment]::GetEnvironmentVariables('Process').Keys) { if ([System.Environment]::GetEnvironmentVariable($key, 'Machine') -eq $null) { $value = [System.Environment]::GetEnvironmentVariable($key, 'Process') [System.Environment]::SetEnvironmentVariable($key, $value, 'Machine') } } Bootstrap.ps1 REFERENCE: Elton Stoneman https://github.com/sixeyed/nerd-dinner/blob/dockerize-part2/docker/web/bootstrap.ps1
- 29. CICD
- 30. Automating Image Builds (CI) Git / TFS VSTS Build Definition Registry Build Images Pull Latest Push Images Service Image Repo Latest Version Info Repository tags Promotion tags Commit / Checkin VSTS Service Repo Tagged Images
- 31. Build Definition
- 32. Build Output
- 35. Your investment in .NET will pay off.