Network timed out while trying to connect to https://index.docker.io

Question

I had the same problem this morning and the following fixed it for me:

$ docker-machine restart default      # Restart the environment
$ eval $(docker-machine env default)  # Refresh your environment settings

It appears that this is due to the Docker virtual machine getting itself into a strange state. There is an open github issue here

I installed Docker without the Toolbox on Windows 10, so the version that requires Hyper-V to be enabled.

For Docker version 1.12 I had to go into the taskbar, right click the Docker Icon, select Settings -> Network and set the DNS Server to fixed, so that is uses Google's DNS server at 8.8.8.8.

Once that setting was changed, it finally worked.

The simpler solution is to add the following entry in /etc/default/docker file

export http_proxy="http://HOST:PORT/"

and restart the docker service

service docker restart

Update August 2016

Using Docker for Mac (version 1.12.0), was seeing issues of the form:

➜  docker pull node
Using default tag: latest
Pulling repository docker.io/library/node
Network timed out while trying to connect to https://index.docker.io/v1/repositories/library/node/images. You may want to check your internet connection or if you are behind a proxy.`enter code here`

This was resolved by updating my MacBook Pro wireless network settings to include the following DNS entry: 8.8.8.8

For further info, please see this (dated) issue which provided the answer given here.

I ran into this problem running Docker on my MAC(host) with Docker VM in VBOX 5.10. It is a networking issue. The simple fix is to add a bridged network to the VBOX image. You can use the included NAT config present with the VM, but you need to change the ssh port from 50375 to 2375.

sudo service docker stop
sudo service docker start

works for me..

somehow, sudo service docker restart didn't work

(RHEL7)