Centos 7 private docker repo

gistfile1.txt

In my CentOS Linux release 7.1.1503 (Core)
The following configuration is working.

file: /lib/systemd/system/docker.service text:

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network.target docker.socket
Requires=docker.socket

[Service]
EnvironmentFile=-/etc/sysconfig/docker
ExecStart=/usr/bin/docker -d $other_args -H fd://
MountFlags=slave
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity

[Install]
WantedBy=multi-user.target
check here >> EnvironmentFile=-/etc/sysconfig/docker
check here >> ExecStart=/usr/bin/docker -d $other_args -H fd://

file: /etc/sysconfig/docker text:

# /etc/sysconfig/docker
#
# Other arguments to pass to the docker daemon process
# These will be parsed by the sysv initscript and appended
# to the arguments list passed to docker -d

other_args="--insecure-registry yoururl"
set registry address >> other_args="--insecure-registry yoururl"