Docker Create Command

Introduction

Docker is a popular platform for developing, shipping, and running applications. The docker create command is used to create a new container from an image. In this challenge, you will learn how to use the docker create command to create a new container step-by-step.

Skills Graph

Create a Container from an Image

In this sub-challenge, you will learn how to create a new container from an image using the docker create command.

Target

• Create a new container from the httpd image.

Example

Here is an example of what you should be able to accomplish at the end of this step:

1. Open a terminal or command prompt.
2. Create a new container from the httpd image.

• If this is the first time you enter this command

• If this is not the first time you enter this command

3. Check if the container has been created.

Hints

If the container name is already in use, you can use the docker rm -f xxx(container-name) command to remove it.

Requirements

• Docker must be installed on your machine.

Name the Container

In this sub-challenge, you will learn how to name a container using the --name option.

Target

• Create a new container called my-httpd from the httpd image.

Example

Here is an example of what you should be able to accomplish at the end of this step:

1. Open a terminal or command prompt.
2. Create a new container called my-httpd from the httpd image.

3. Check if the container has been created.

Tip

If the container name is already in use, you can use the docker rm -f xxx(container-name) command to remove it.

Requirements

• Docker must be installed on your machine.

Map Ports

In this sub-challenge, you will learn how to map ports using the -p option.

Target

• Map port 8080 on the host to port 80 in a container called my-httpd2.

Example

Here is an example of what you should be able to accomplish at the end of this step:

1. Open a terminal or command prompt.
2. Create a new container called my-httpd2 from the httpd image and map port 8080 on the host to port 80 in the container.

3. Check if the host port mapping is in the container configuration.

Tip

If the container name is already in use, you can use the docker rm -f xxx(container-name) command to remove it.

Requirements

• Docker must be installed on your machine.

Set Environment Variables

In this sub-challenge, you will learn how to set environment variables using the -e option.

Target

• Set the NGINX_HOST environment variable to example.com in a container called my-httpd3.

Example

Here is an example of what you should be able to accomplish at the end of this step:

• Open a terminal or command prompt.
• Create a new container called my-httpd3 from the httpd image and set the TEST-ENV environment variable to test-value in the container.

• Check if the environment variable is in the container configuration.

Tip

If the container name is already in use, you can use the docker rm -f xxx(container-name) command to remove it.

Requirements

• Docker must be installed on your machine.

Mount Volumes

In this sub-challenge, you will learn how to mount volumes using the -v option.

Target

• Mount the /var/www directory on the host to the /usr/share/nginx/html directory in a container called my-httpd4.

Example

Here is an example of what you should be able to accomplish at the end of this step:

1. Open a terminal or command prompt.
2. Create a new container called my-httpd4 from the httpd image and mount the /var/www directory on the host to the /usr/share/nginx/html directory in the container.

3. Check if the volume mount of the container is configured in the container.

Tip

If the container name is already in use, you can use the docker rm -f xxx(container-name) command to remove it.

Requirements

• Docker must be installed on your machine.

Summary

In this challenge, you learned how to use the docker create command to create a new container step-by-step. You learned how to create a container from an image, name the container, map ports, set environment variables, and mount volumes. With these skills, you can create and configure containers to run your applications in Docker.