Docker .NET Core DevelopersTASWAR BHATTI (MVP)@TASWARBHATTI HTTP:/ /TASWAR.ZEYTINSOFT.COM

Agenda - What is docker?

◦ Images and Containers◦ Docker vs VM◦ Tools

- Dockerfile

- Docker linking with other containers

- Docker compose

- Summary

What is Docker? - Lightweight, open, secure platform

- Simplify building, shipping, running apps

- Shipping container system for code

- Runs natively on Linux or Windows Server

- Runs on Windows or Mac Development machines (with a virtual machine or Hyper-V)

- Relies on "images" and "containers"

Images and Containers

Docker Image - Ubuntu, DotNet Core, Node etc

- An image is an inert, immutable, file essentially a snapshot of a container

- A read-only template composed of layered filesystems used to share common files

- Create Docker container instances

- Created by docker build command

- Stored in Docker registry (Docker Hub)

Docker Container - Container is an instance of your image but running

- Using the docker run command

- An isolated and secured shipping container

- created from an image that can be run, started, stopped, moved and deleted

Docker vs VM

Tools for Docker - Install docker from https://docs.docker.com/

Kitematic A GUI component for Docker

- Allows one to control the container (start, stop, remove, etc)

Demo of Kitematic

Dockerfile - A dockerfile is a simple text file that contains the commands a user could call to assemble an image.

Dockerfile (Sample) FROM microsoft/dotnet:latest

COPY . /app

WORKDIR /app

RUN ["dotnet", "restore"]

RUN ["dotnet", "build"]

EXPOSE 5000/tcp

ENV ASPNETCORE_URLS http://*:5000

ENTRYPOINT ["dotnet", "run"]

Linking Docker Container Demo

Docker Compose

Docker-compose.yml

Demo

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Twitter: @taswarbhatti

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