02-pull-an-image-from-registry.md

Pulling an Image from Registry Server

In this lab session, we will learn about how to add our insecure registry to different Docker hosts and pull an image.

The First Attempt

• Go to second Docker host
• Execute the following command to pull the image we just pushed to our registry

docker pull <REGISTRY-HOST-IP>:5000/my-busybox

Using default tag: latest
Error response from daemon: Get https://<REGISTRY-HOST-IP>:5000/v2/: http: server gave HTTP response to HTTPS client

• What's wrong?
• Execute docker info command to get Docker daemon details and notice Insecure Registries.

Add the Registry Server

• Execute the following command to create the config file for Docker daemon

nano /etc/docker/daemon.json

• Add the following JSON

{
  "insecure-registries" : ["REGISTRY-HOST-IP:5000"]
}

• Restart the Docker daemon by executing the command sudo service docker restart
• Retry to pull the image

docker pull <REGISTRY-HOST-IP>:5000/my-busybox

Next > Preserving registry data Previous > Running a Registry Server