启动docker报错

[root@ opt]# systemctl status docker.service -l

● docker.service - Docker Application Container Engine

   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)

   Active: activating (start) since 二 2017-11-07 16:46:51 CST; 9s ago

     Docs: http://docs.docker.com

▽Main PID: 8856 (docker-current)

   Memory: 341.8M

   CGroup: /system.slice/docker.service

           └─8856 /usr/bin/docker-current daemon --exec-opt native.cgroupdriver=systemd --selinux-enabled --ip=10.2.0.6 -b=docker0 --insecure-registry=10.2.0.6:5000

11月 07 16:46:51 systemd[1]: Starting Docker Application Container Engine...

11月 07 16:46:59 docker-current[8856]: time="2017-11-07T16:46:59.653934630+08:00" level=warning msg="devmapper: Usage of loopback devices is strongly discouraged for production use. Please use `--storage-opt dm.thinpooldev` or use `man docker` to refer to dm.thinpooldev section."

11月 07 16:46:59  docker-current[8856]: time="2017-11-07T16:46:59.868187155+08:00" level=warning msg="devmapper: Base device already exists and has 

filesystem xfs on it. User specified filesystem  will be ignored."

11月 07 16:46:59  docker-current[8856]: time="2017-11-07T16:46:59.886541240+08:00" level=info msg="[graphdriver] using prior storage driver \"devicemapper\""

临时解决方案：

 vim /etc/sysconfig/docker

DOCKER_STORAGE_OPTIONS="--storage-opt dm.no_warn_on_loop_devices=true"