docker中国区镜像加速

[root@syzyy ~]# vim /etc/docker/daemon.json
{
  "registry-mirros":[
    "https://registry.docker-cn.com"
  ]
}

[root@syzyy ~]# systemctl restart docker
[root@syzyy ~]# docker info
Containers: 4
 Running: 1
 Paused: 0
 Stopped: 3
Images: 4
Server Version: 1.13.1
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: false
Logging Driver: journald
Cgroup Driver: systemd
Plugins: 
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: docker-runc runc
Default Runtime: docker-runc
Init Binary: /usr/libexec/docker/docker-init-current
containerd version:  (expected: aa8187dbd3b7ad67d8e5e3a15115d3eef43a7ed1)
runc version: 290a33602b16ff2d1cc5339bc0297f0e094462ce (expected: 9df8b306d01f59d3a8029be411de015b7304dd8f)
init version: fec3683b971d9c3ef73f284f176672c44b448662 (expected: 949e6facb77383876aeff8a6944dde66b3089574)
Security Options:
 seccomp
  WARNING: You're not using the default seccomp profile
  Profile: /etc/docker/seccomp.json
Kernel Version: 3.10.0-514.26.2.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
Number of Docker Hooks: 3
CPUs: 2
Total Memory: 3.702 GiB
Name: syzyy
ID: BYVL:G5RP:5YUU:BPL3:WGJX:LTAE:I4RY:2GKK:F3IX:Y3DL:KXSG:JBFV
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
 127.0.0.0/8
Registry Mirros:
 https://registry.docker-cn.com/
Live Restore Enabled: false
Registries: docker.io (secure)