Setting up private registry in Docker - Quick Revision & Summary

Recall & Review

beginner

What is a private Docker registry?

A private Docker registry is a secure place where you can store and share your Docker images within your organization, instead of using public registries like Docker Hub.

beginner

Which Docker command starts a private registry container?

The command is docker run -d -p 5000:5000 --name registry registry:2. It runs the official registry image on port 5000.

intermediate

Why do you need to configure Docker clients to trust a private registry?

Because private registries often use self-signed certificates or run without HTTPS, Docker clients must be told to trust them to allow pushing and pulling images.

beginner

How do you tag an image to push it to your private registry?

Use docker tag <image> localhost:5000/<image> to tag the image with the private registry address before pushing.

beginner

What is the purpose of the docker push command in setting up a private registry?

It uploads your Docker image to the private registry so others can pull and use it.

Which port does the default Docker private registry listen on?

A 8080

B 80

C 443

D 5000

The default Docker registry container listens on port 5000.

What command starts a Docker registry container?

A docker build registry

B docker run -d -p 5000:5000 --name registry registry:2

C docker start registry

D docker push registry

This command runs the official Docker registry image as a container on port 5000.

Before pushing an image to a private registry, what must you do?

A Tag the image with the registry address

B Delete the image

C Run docker pull

D Restart Docker daemon

You must tag the image with the private registry's address to push it there.

Why might you need to configure Docker to trust your private registry?

A Because private registries require a password

B Because Docker only trusts public registries

C Because it may use self-signed certificates or no HTTPS

D Because Docker needs a license

Private registries often use self-signed certificates or run without HTTPS, so Docker must be configured to trust them.

What does the docker push command do?

A Uploads an image to a registry

B Downloads an image from a registry

C Deletes an image locally

D Builds a new image

The docker push command uploads your image to the specified registry.

Explain the steps to set up a private Docker registry and push an image to it.

Think about starting the registry, preparing the image, and uploading it.

Why is it important to configure Docker clients to trust a private registry, and how can this be done?

Focus on security and Docker client settings.