Create a Simple App Using Docker.

It is imperative for every cloud engineer to acquire proficiency in Docker, as this skill significantly streamlines tasks and enhances efficiency.

Docker is an open-source project and a containerization platform. It standardizes packages of applications and their dependencies into containers, which share the same OS kernel.

Scenario

You are a devops engineer that was tasked to create a docker container for the application the development team created.

OBJECTIVE

Our upcoming task involves the transformation of a Dockerfile, which includes the directives and files necessary for generating a Docker image. Subsequently, this image will be transformed into a container.

CREATING A DOCKER CONTAINER

Navigate into the terminal and move into the folder which has the Dockerfile. The Dockerfile uses the latest version of the nginx image (which includes a configured installation of NGINX).

To build the image, from the folder run the docker build command.

docker build -t <dockerfilename> .

To verify and locate the image you just created run this command`:

docker images

Convert the image to a container with this command:

docker run -d -p 8081:80 <dockerfilename> 

This will run in detached mode, so your terminal should return to the prompt immediately.

Verify the container is running with docker ps. Confirm the port mapping with docker port <CONTAINERID>.

Browse to http://localhost:8081 to view the container.

Congratulations on creating your first container!!!!.

Run a docker stop <CONTAINERID> to stop the 2048 container app.
Run a docker rm <CONTAINERID> to remove the 2048 container.