03. Build a new Container Image

Hands-on labs Introduction to Docker

Exercise 03: Build a new Container Image

In this exercise, you will go through the steps of creating a new Container image. First from the command line using Docker commit and in a second step by using a Docker file and the Docker build command. Accompanying files can be found I this folder.

Using steps on the command-line

• Run a new container, add some files and exit the modified container

docker run -it --name mycontainer mcr.microsoft.com/windows/servercore:1809 cmd
md builddemo
cd buidldemo
copy con myfile.txt
this is a text file
ctrl+c
exit

• Get all running and stopped containers
• Create a new images by committing a new layer
• Run the new container

docker ps -a
docker commit mycontainer mycontainer2
docker images 
docker run -it --name myowncontainer mycontainer2 cmd
dir
exit

• If everything went well, the file you created earlier is now part if the new container

Using the Docker build file

• On your command line ensure you are in the folder 03. Build a new Container Image, that contains Docker file (Dockerfile)
• Build the Docker image from the Dockerfile
• Find all images on your machines
• Find the running container ID
• Find the IP address of the running container

Docker build -t mynewiiscontainer .
Docker images
Docker run -d -p 80:80 mynewiiscontainer 
Docker ps 
Docker inspect containerID

• Start a browser and navigate to the IP address and see the new website running on port 80 serving the index.htm file that is in the current folder