SAMPLE DOCKER SETTINGS FOR .NET CORE WITH POSTGRESQL

This is an example project demonstrating the use of docker to run a .NET Core Web API with Postgresql The Base TodoApi Sample Project was cloned from https://github.com/laxmansahni/TodoApi/

Settings was referenced from:

1. https://docs.microsoft.com/en-us/dotnet/core/docker/docker-basics-dotnet-core
2. https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
3. https://github.com/rajvirtual/docker-aspnetcore-postgresql

NOTES ON DOT NET DB MIGRATION

Ideally you want to run your migrations by yourself but i have modified the code in the base Todoapi project so that migrations are executed at run time. The ugly copy and paste class can be found in TodoApi/Startup.cs called DataSeeder class. It is called in line 51 app.SeedData();.

ACCESSING THE INDIVIDUAL CONTAINERS

You can ssh into individual containers to test commands while building build steps for dockerfiles, Below are a list of docker commands you can use for your everyday docker tasks.

Task	Command	Notes
show all containers	docker ps -a	-
ssh into container	docker exec -it <containerid/name> bash	Use winpty docker exec it <containerid/name> bash if you are on windows bash
Builds docker image and removes it if faulty image build	docker build -t --rm test-container .	Run at the same directory where the Dockerfile resides
stops a container	docker stop <containerid/name>	-
run a stopped container	docker run <containerid/name>	-
removes a stopped container	docker rm <containerid/name>	-
shows all available images	docker images	-
removes an available image	docker image rm <imageid/name>	-

HOW TO RUN

1. docker-compose up.
2. You can test if the application works by visiting http://localhost:7000/api/values or http://localhost:7000/api/todo.
3. To stop, ctrl+c and run docker-compose down to ensure containers shut down properly.

NOTES ON docker-compose up

• If you run docker-compose up , it will re-use an available built image if it exists, otherwise it will build it.
• If your code changes or docker file changes are not picked up by docker-compose, you may need to remove the image manually and build it manually.