3_publish_image.md

Publish image

The following procedure describes how to create a repository on Docker Hub and publish an image.

Create repository on Docker Public Registry

• Docker Hub

• List of user’s repositories

• Repository details

• Repository created

the newly created repository will contain all the version of the application’s image

Create image

• Image needs to be created using username of the Docker Cloud account docker build -t lucj/message-app .

Push image to Docker Cloud

Before publishing an image, authentication must be performed with the following command: docker login

Image can then be published to the user repository docker push lucj/message-app

Instantiate the image

The image can then be used from any Docker host (the image is public in this example)

• docker pull lucj/message-app
• docker run -dP lucj/message-app (will start with an error as no database information is provided)