This command simply tells Docker to use Microsoft's official aspnetcore runtime image as its base. Here's what's going on: FROM microsoft/aspnetcore:latest RUN curl -sSL | bash /dev/stdin -v latest -l /vsdbg I wasn't quite sure at first how to go about this but a little googling surfaced this thread (thanks galvesribeiro) and the following Dockerfile: FROM microsoft/aspnetcore:latest We want to be able to debug our services while they run in Docker. One area in particular where the current developer experience with Docker is a bit lacking in Visual Studio Code compared to Visual Studio is debugging. These steps are also largely cross-platform as they should work in a mac or linux environment with very little adjustment. For our purposes, there is still a lot of value in the CLI approach we'll be using as it forces a greater understanding of the tooling and process involved in Docker development with. Visual Studio Code, on the other hand, is not nearly as refined at the moment and requires a much more hands-on approach. Visual Studio 2017 has excellent support for Docker built-in so it offers much greater productivity and saves you from mucking with dockerfiles and the CLI directly. One thing we should understand: since we are using Visual Studio Code and a CLI development approach we need to know many of the steps involved in working with Docker in much greater detail than if we were using Visual Studio. Next, I added each project to the previously created solution file: > dotnet sln add services/applicants.api/ > dotnet sln add services/jobs.api/ > dotnet sln add services/identity.api/ Welcome DockerĪt this point, we'll step away from the code for a bit to introduce Docker into our solution and workflow. Note that you can omit the name parameter and the new project will inherit the name of the parent directory. Within each microservice directory, I created a new Web API project. In the same directory, I created a new directory called services to house the microservices we'll be using: Applicants.Api, Identity.Api and Jobs.Api. Starting with an empty directory, you can create a new solution using the. Docker Community Edition 17.09.1-ce-win42 using Linux containers.The demo web app we'll build in this post is powered by 3 ASP.NET Core microservices, RabbitMQ, Redis and Sql Server on Linux all running in docker containers Dev Environment Likewise, for containers, there are many other important areas we will not be exploring in this guide like the principles of container design and orchestration. This post does not dive deeply into design and modeling theory. Some of the most critical and challenging exercises in microservice architecture can be properly identifying and defining domain and data models, bounded contexts and their relationships. The goal of this post is to get from zero to off-the-ground with ASP.NET Core-based microservices and Docker. Please Note - Both of these topics, particularly microservices - are vast and deep so there are many very important aspects I'll be skimming over or simply not mention here. In this post, we'll see how to combine ASP.NET Core and Docker using a cross-platform approach to build, debug and deploy a microservices-based proof-of-concept using Visual Studio Code. These properties make it ideal for building containerized microservice applications. NET Core's design are its modularity and lightweight nature. Looking at the characteristics of both concepts, we can start to see why they might work well together to help us develop systems that are easier to deploy, scale, maintain and provide an increased level of stability compared to a traditional monolithic approach. Microservices represent an architectural style in which the system can be broken up into individual services, each one with a single, narrowly focused capability that is exposed with an API to the rest of the system as well as external consumers like web and mobile apps. This image can then be downloaded and run in an execution environment called a container on any number of other computers acting as a container host. Get Started Building Microservices with ASP.NET Core and Docker in Visual Studio CodeĬontainers and microservices are two huge, emerging trends in software development today.įor the uninitiated, containers are a super cool way to package up your application, its dependencies, and configuration in a portable, easily distributable image file.
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