Description of problem:

# rpm -qf docker.service
docker-1.12.2-5.el7.x86_64
root@bkr-hv02-guest12: /usr/lib/systemd/system # cat docker.service 
[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target
Wants=docker-storage-setup.service
Requires=rhel-push-plugin.socket

[Service]
Type=notify
NotifyAccess=all
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker
Environment=GOTRACEBACK=crash
Environment=DOCKER_HTTP_HOST_COMPAT=1
Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin
ExecStart=/usr/bin/dockerd-current \
          --add-runtime docker-runc=/usr/libexec/docker/docker-runc \
          --default-runtime=docker-runc \
          --authorization-plugin=rhel-push-plugin \
          --exec-opt native.cgroupdriver=systemd \
          $OPTIONS \
          $DOCKER_STORAGE_OPTIONS \
          $DOCKER_NETWORK_OPTIONS \
          $ADD_REGISTRY \
          $BLOCK_REGISTRY \
          $INSECURE_REGISTRY
ExecReload=/bin/kill -s HUP $MAINPID
TasksMax=infinity
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
TimeoutStartSec=0
Restart=on-abnormal
MountFlags=slave


[Install]
WantedBy=multi-user.target





Version-Release number of selected component (if applicable):

docker-1.12.2-5.el7.x86_64 

How reproducible:

install docker-1.12.2-5.el7.x86_64

Steps to Reproduce:
See above 

Actual results:

it fails to read env variables for docker-storage and docker-network during docker start 


Expected results:

to read env variables for docker-storage and docker-network and apply these values 


Additional info: