In the previous post we looked and an “off the shelf” image of nginx, which we deployed to Kubernetes and were able to access externally using Ingress. This post follows on from that one, so do refer back to it if you have any issues with the following configurations etc.<\/p>\n
Let’s look at the steps for deploying our own Docker image to k8s and better still let’s deploy a dotnet core webapp.<\/p>\n
Note: Kubernetes is deprecating its support for Docker, however this does not mean we cannot deployed docker images, just that we need to use the docker shim or generated container-d (or other container) images.<\/em><\/p>\n The App<\/strong><\/p>\n We’ll create a standard dotnet ASP.NET core Razor application which you can obviously do what you wish to, but we’ll take the default implementation and turn this into a docker image and then deploy it to k8s.<\/p>\n So to start with…<\/p>\n It’d be good to see this is all working, so if let’s run the demo using<\/p>\n Now use your browser to access http:\/\/your-server-ip:5000\/ and you should see the Razor demo home page, or use curl to see if you get valid HTML returned, i.e.<\/p>\n Generating the Docker image<\/strong><\/p>\n Note: If you changed launchSettings.json to use 0.0.0.0, reset this to localhost.<\/em><\/p>\n Here’s the Dockerfile for building an image, it’s basically going to publish a release build of our Razor application then set up the image to run the razordemo.dll via dotnet from a Docker instance.<\/p>\n Now run docker build using the following<\/p>\n If you want to check the image works as expect then run the following<\/p>\n Now check the image is running okay by using curl as we did previously. If all worked you should see the Razor demo home page again, but now we’re seeing if within the docker instance.<\/p>\n\n
\r\ndotnet new webapp -o razordemo --no-https -f net5.0\r\n<\/pre>\n<\/li>\n
\r\ndotnet run\r\n<\/pre>\n
\r\ncurl http:\/\/your-server-ip:5000\r\n<\/pre>\n
\r\nFROM mcr.microsoft.com\/dotnet\/sdk:5.0 AS build\r\nWORKDIR \/src\r\nCOPY razordemo.csproj .\r\nRUN dotnet restore\r\nCOPY . .\r\nRUN dotnet publish -c release -o \/app\r\n\r\nFROM mcr.microsoft.com\/dotnet\/aspnet:5.0\r\nWORKDIR \/app\r\nCOPY --from=build \/app .\r\nENTRYPOINT ["dotnet", "razordemo.dll"]\r\n<\/pre>\n
\r\ndocker build . -t razordemo --no-cache\r\n<\/pre>\n
\r\ndocker run -d -p 5000:80 razordemo \r\n<\/pre>\n