Docker::Error::ServerError: Invalid registry endpoint on CentOS 7

[marc-]

Getting following error when trying to use docker image from private reporistory.

ERROR: machine_image[test] (test-app::default line 18) had an error: 
Docker::Error::ServerError: Invalid registry endpoint https://<server_address>/v1/: 
Get https://<server_address>/v1/_ping: dial tcp: i/o timeout. If this private 
registry supports only HTTP or HTTPS with an unknown CA certificate, 
please add `--insecure-registry <server_address>` to the daemon's 
arguments. In the case of HTTPS, if you have access to the registry's 
CA certificate, no need for the flag; simply place the CA certificate 
at /etc/docker/certs.d/<server_address>/ca.crt

My private repostiry uses ssl with self-signed certificate. I have certificate installed at /etc/docker/certs.d/<server_address>/ca.crt on host system. When I do docker pull <server_address>/<image_name>:<tag> on the same VM it works just fine. Though, machine_image resource fails with error above.

Here is my recipe:

require 'chef/provisioning/docker_driver'

with_driver 'docker'

if platform_family?'rhel'
# Workaround for https://github.com/swipely/docker-api/issues/155 .
# CentOS 7 has docker 1.3.2 version by default wich supports 1.15 Docker API. 
# Default version defined in docker-api is 1.16.
    Docker::API_VERSION='1.15'
end

# create test image
machine_image 'test' do
  recipe 'test-app'
  recipe 'test-app::cleanup'

  machine_options :docker_options => {
      :base_image => {
          :name => 'my-private-docker-registry.org/centos',
          :repository => 'my-private-docker-registry.org/centos',
          :tag => '7'
      }
  }
end

[marc-]

Looks like issue was caused by docker service restart via systemd on the host system. At least when I've removed it error disappeared. Error message seems misleading.