# yum install -y vim wget telnet lrzsz tree yum-utils device-mapper-persistent lvm2 bash-comple*

# source /usr/share/bash-completion/bash_completion

# rm -rf /etc/yum.repos.d/*

# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

# wget -O /etc/yum.repos.d/docker-ce.repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# yum makecache fast

# wget https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-18.09.9-3.el7.x86_64.rpm

# yum localinstall docker-ce-*

# systemctl start docker

[root@localhost ~]# docker info

...

 Server Version: 18.09.9
 Storage Driver: devicemapper
  Pool Name: docker-8:3-33951780-pool
  Pool Blocksize: 65.54kB
  Base Device Size: 10.74GB
  Backing Filesystem: xfs
  Udev Sync Supported: true
  Data file: /dev/loop0
  Metadata file: /dev/loop1
  Data loop file: /var/lib/docker/devicemapper/devicemapper/data
  Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
  Data Space Used: 11.8MB
  Data Space Total: 107.4GB

...

WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
WARNING: the devicemapper storage-driver is deprecated, and will be removed in a future release.
WARNING: devicemapper: usage of loopback devices is strongly discouraged for production use.
         Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.

[root@localhost ~]# vim /etc/docker/daemon.json
{
  "registry-mirrors": ["https://05eotbde.mirror.aliyuncs.com"]
}

  [root@localhost ~]# systemctl daemon-reload
  [root@localhost ~]# systemctl restart docker

[root@localhost ~]# docker pull nginx

[root@localhost ~]# docker run -itd -p 80:80 --name test nginx
eed6fd358800d695eb83e4b509dfe082351a005adf07c00e733eaadf730fbb43

[root@localhost ~]# vim /etc/docker/daemon.json 
{
  "registry-mirrors": ["https://05eotbde.mirror.aliyuncs.com"],
  "storage-driver": "overlay"
}

[root@localhost ~]# vim /lib/systemd/system/docker.service 

...

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock -s=overlay
ExecReload=/bin/kill -s HUP $MAINPID

...

[root@localhost ~]# systemctl daemon-reload

[root@localhost ~]# systemctl restart docker
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

Jul 10 23:57:57 localhost dockerd: Error starting daemon: error initializing graphdriver: overlay: the backing xfs filesystem is formatted without d_type support, which leads to incorrect behavior. Reformat the filesystem with ftype=1 to enable d_type support. Backing filesystems without d_type support are not supported.

[root@localhost ~]# fdisk -l /dev/sdb

Disk /dev/sdb: 214.7 GB, 214748364800 bytes, 419430400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

注意：可能会出现umount: /var/lib/docker: target is busy.

关闭占用进程fuser -km /var/lib/docker（慎用fuser -km）。在psmisc包中yum install psmisc -y

或者systemctl stop docker再次进行卸载

[root@localhost ~]# mkfs.xfs -n ftype=1 /dev/sdb
meta-data=/dev/sdb               isize=256    agcount=4, agsize=13107200 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=52428800, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=25600, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

注意：如果你原先有不同存储驱动的层数据，更换存储驱动后将不可用，建议备份镜像并清除 /var/lib/docker 下所有数据。

备份镜像可以用 docker save 导出镜像，之后用 docker load 导入镜像。

[root@localhost ~]# mount /dev/sdb /var/lib/docker

[root@localhost ~]# systemctl start docker

[root@localhost ~]# docker info
...

 Server Version: 18.09.9
 Storage Driver: overlay
  Backing Filesystem: xfs
  Supports d_type: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Plugins:
  Volume: local
  Network: bridge host macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive

...

[root@localhost ~]# docker images
REPOSITORY   TAG       IMAGE ID   CREATED   SIZE


[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES