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Mano Marks
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Merge pull request dockersamples#122 from sixeyed/master
Add .NET Core variants running in Windows containers
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‎.gitignore

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*.pyc
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project.lock.json
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bin/
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obj/
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obj/
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.vs/

‎ExampleVotingApp.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 15
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VisualStudioVersion = 15.0.28010.2036
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Vote", "vote\dotnet\Vote\Vote.csproj", "{9687EAF5-BFF3-4F8D-9C78-1B8EE12CE091}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Worker", "worker\dotnet\Worker\Worker.csproj", "{083764E8-4C34-43FB-A468-F80CE0ADE10A}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Result", "result\dotnet\Result\Result.csproj", "{9AD16D72-E3F5-4A76-814C-40EBD1EE7892}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{9687EAF5-BFF3-4F8D-9C78-1B8EE12CE091}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{9687EAF5-BFF3-4F8D-9C78-1B8EE12CE091}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{9687EAF5-BFF3-4F8D-9C78-1B8EE12CE091}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{9687EAF5-BFF3-4F8D-9C78-1B8EE12CE091}.Release|Any CPU.Build.0 = Release|Any CPU
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{083764E8-4C34-43FB-A468-F80CE0ADE10A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{083764E8-4C34-43FB-A468-F80CE0ADE10A}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{083764E8-4C34-43FB-A468-F80CE0ADE10A}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{083764E8-4C34-43FB-A468-F80CE0ADE10A}.Release|Any CPU.Build.0 = Release|Any CPU
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{9AD16D72-E3F5-4A76-814C-40EBD1EE7892}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{9AD16D72-E3F5-4A76-814C-40EBD1EE7892}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{9AD16D72-E3F5-4A76-814C-40EBD1EE7892}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{9AD16D72-E3F5-4A76-814C-40EBD1EE7892}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {9DEFC158-1225-4393-8A38-22256211D43D}
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EndGlobalSection
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EndGlobal

‎README.md

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Example Voting App
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=========
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A simple distributed application running across multiple Docker containers.
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Getting started
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---------------
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Download [Docker](https://www.docker.com/products/overview). If you are on Mac or Windows, [Docker Compose](https://docs.docker.com/compose) will be automatically installed. On Linux, make sure you have the latest version of [Compose](https://docs.docker.com/compose/install/). If you're using [Docker for Windows](https://docs.docker.com/docker-for-windows/) on Windows 10 pro or later, you must also [switch to Linux containers](https://docs.docker.com/docker-for-windows/#switch-between-windows-and-linux-containers).
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Download [Docker Desktop](https://www.docker.com/products/docker-desktop) for Mac or Windows. [Docker Compose](https://docs.docker.com/compose) will be automatically installed. On Linux, make sure you have the latest version of [Compose](https://docs.docker.com/compose/install/).
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## Linux Containers
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The Linux stack uses Python, Node.js, .NET Core (or optionally Java), with Redis for messaging and Postgres for storage.
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> If you're using [Docker Desktop on Windows](https://store.docker.com/editions/community/docker-ce-desktop-windows), you can run the Linux version by [switching to Linux containers](https://docs.docker.com/docker-for-windows/#switch-between-windows-and-linux-containers), or run the Windows containers version.
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Run in this directory:
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```
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docker stack deploy --compose-file docker-stack.yml vote
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```
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## Windows Containers
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An alternative version of the app uses Windows containers based on Nano Server. This stack runs on .NET Core, using [NATS](https://nats.io) for messaging and [TiDB](https://github.com/pingcap/tidb) for storage.
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You can build from source using:
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```
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docker-compose -f docker-compose-windows.yml build
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```
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Then run the app using:
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```
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docker-compose -f docker-compose-windows.yml up -d
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```
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> Or in a Windows swarm, run `docker stack deploy -c docker-stack-windows.yml vote`
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The app will be running at [http://localhost:5000](http://localhost:5000), and the results will be at [http://localhost:5001](http://localhost:5001).
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Run the app in Kubernetes
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-------------------------
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![Architecture diagram](architecture.png)
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* A Python webapp which lets you vote between two options
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* A Redis queue which collects new votes
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* A .NET worker which consumes votes and stores them in…
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* A Postgres database backed by a Docker volume
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* A Node.js webapp which shows the results of the voting in real time
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* A front-end web app in [Python](/vote) or [ASP.NET Core](/vote/dotnet) which lets you vote between two options
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* A [Redis](https://hub.docker.com/_/redis/) or [NATS](https://hub.docker.com/_/nats/) queue which collects new votes
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* A [.NET Core](/worker/src/Worker), [Java](/worker/src/main) or [.NET Core 2.1](/worker/dotnet) worker which consumes votes and stores them in…
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* A [Postgres](https://hub.docker.com/_/postgres/) or [TiDB](https://hub.docker.com/r/dockersamples/tidb/tags/) database backed by a Docker volume
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* A [Node.js](/result) or [ASP.NET Core SignalR](/result/dotnet) webapp which shows the results of the voting in real time
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Note

‎docker-compose-windows.yml

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version: "3.2"
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services:
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vote:
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image: dockersamples/examplevotingapp_vote:dotnet-nanoserver-sac2016
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build:
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context: ./vote/dotnet
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ports:
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- "5000:80"
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depends_on:
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- message-queue
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result:
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image: dockersamples/examplevotingapp_result:dotnet-nanoserver-sac2016
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build:
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context: ./result/dotnet
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ports:
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- "5001:80"
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environment:
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- "ConnectionStrings:ResultData=Server=db;Port=4000;Database=votes;User=root;SslMode=None"
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depends_on:
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- db
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worker:
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image: dockersamples/examplevotingapp_worker:dotnet-nanoserver-sac2016
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build:
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context: ./worker/dotnet
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environment:
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- "ConnectionStrings:VoteData=Server=db;Port=4000;Database=votes;User=root;SslMode=None"
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depends_on:
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- message-queue
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- db
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message-queue:
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image: nats:nanoserver
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db:
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image: dockersamples/tidb:nanoserver
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ports:
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- "3306:4000"
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networks:
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default:
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external:
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name: nat

‎docker-stack-windows.yml

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version: "3.2"
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services:
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vote:
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image: dockersamples/examplevotingapp_vote:dotnet-nanoserver-sac2016
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ports:
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- mode: host
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target: 80
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published: 5000
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deploy:
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endpoint_mode: dnsrr
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networks:
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- frontend
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- backend
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result:
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image: dockersamples/examplevotingapp_result:dotnet-nanoserver-sac2016
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environment:
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- "ConnectionStrings:ResultData=Server=db;Port=4000;Database=votes;User=root;SslMode=None"
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ports:
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- mode: host
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target: 80
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published: 5001
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deploy:
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endpoint_mode: dnsrr
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networks:
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- frontend
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- backend
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worker:
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image: dockersamples/examplevotingapp_worker:dotnet-nanoserver-sac2016
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environment:
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- "ConnectionStrings:VoteData=Server=db;Port=4000;Database=votes;User=root;SslMode=None"
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deploy:
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endpoint_mode: dnsrr
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mode: replicated
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replicas: 3
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networks:
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- backend
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message-queue:
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image: nats:nanoserver
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deploy:
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endpoint_mode: dnsrr
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networks:
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- backend
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db:
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image: dockersamples/tidb:nanoserver
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ports:
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- mode: host
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target: 4000
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published: 3306
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deploy:
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endpoint_mode: dnsrr
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networks:
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- backend
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networks:
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frontend:
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backend:

‎result/dotnet/Dockerfile

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FROM microsoft/dotnet:2.1-sdk-nanoserver-sac2016 as builder
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WORKDIR /Result
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COPY Result/Result.csproj .
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RUN dotnet restore
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COPY /Result .
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RUN dotnet publish -c Release -o /out Result.csproj
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# app image
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FROM microsoft/dotnet:2.1-aspnetcore-runtime-nanoserver-sac2016
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WORKDIR /app
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ENTRYPOINT ["dotnet", "Result.dll"]
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COPY --from=builder /out .

‎result/dotnet/Result/Data/IResultData.cs

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using Result.Models;
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namespace Result.Data
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{
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public interface IResultData
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{
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ResultsModel GetResults();
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}
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}

‎result/dotnet/Result/Data/MySqlResultData.cs

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using System.Linq;
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using Dapper;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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using MySql.Data.MySqlClient;
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using Result.Models;
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namespace Result.Data
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{
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public class MySqlResultData : IResultData
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{
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private readonly string _connectionString;
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private readonly ILogger _logger;
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public MySqlResultData(IConfiguration config, ILogger<MySqlResultData> logger)
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{
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_connectionString = config.GetConnectionString("ResultData");
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_logger = logger;
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}
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public ResultsModel GetResults()
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{
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var model = new ResultsModel();
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using (var connection = new MySqlConnection(_connectionString))
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{
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var results = connection.Query("SELECT vote, COUNT(id) AS count FROM votes GROUP BY vote ORDER BY vote");
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if (results.Any(x => x.vote == "a"))
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{
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model.OptionA = (int) results.First(x => x.vote == "a").count;
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}
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if (results.Any(x => x.vote == "b"))
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{
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model.OptionB = (int) results.First(x => x.vote == "b").count;
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}
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model.VoteCount = model.OptionA + model.OptionB;
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}
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return model;
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}
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}
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}

‎result/dotnet/Result/Hubs/ResultsHub.cs

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using Microsoft.AspNetCore.SignalR;
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namespace Result.Hubs
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{
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public class ResultsHub : Hub
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{
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//no public methods, only used for push from PublishRTesultsTimer
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}
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}

‎result/dotnet/Result/Models/ResultsModel.cs

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namespace Result.Models
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{
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public class ResultsModel
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{
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public int OptionA { get; set; }
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public int OptionB { get; set; }
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public int VoteCount { get; set; }
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}
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}

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