Docker repository server gave HTTP response to HTTPS client

Looks like you haven't set the Docker Daemon right. Notice these few lines:

Insecure Registries: 127.0.0.0/8

Try to add this line to Docker's daemon.json file and restart the Docker Daemon:

"insecure-registries":["192.168.99.100:5000"]

On CentOS 7.2.1511, I had to create a new file

/etc/docker/daemon.json 

with the contents

{ "insecure-registries":["host:port"] } 

(The host is the hostname of the server hosting my docker registry and port is the port where the docker registry is available. In my case, those are 192.168.99.1:50000)

and then restart docker daemon by doing:

$ sudo service docker restart

Hopefully this will help anyone having issues getting the insecure-registries fix to work.

Adding

{ "insecure-registries":["host:port"] }

to

/etc/docker/daemon.json

did not work for me until I created the file

/etc/default/docker

and put the line

DOCKER_OPTS="--config-file=/etc/docker/daemon.json"

in it and then restarted the docker daemon with

sudo systemctl stop docker and sudo systemctl start docker.

For some reason just doing a sudo systemctl restart docker did not work. It threw an error about trying to restart the service to quickly.

Also for ["host:port"] I used the IP of my Docker registry as opposed to the hostname as I did not have DNS or a hosts file setup to be able to find the registry by hostname.

This drove me absolutely nuts until I stumbled upon the /etc/default/docker bit here.

I am new to Docker and so I don't know if this is new requirement since this initial post was answered or if there was something else I missed when I first setup my registry. Though all I did was to follow the current docs on the Docker site itself.