#安裝docker
[root@localhost ~]# yum -y install docker-io
Loaded plugins: fastestmirror
base                                                                            | 3.6 kB  00:00:00
extras                                                                          | 3.4 kB  00:00:00
updates                                                                         
 
| 3.4 kB  00:00:00
(1/4): extras/7/x86_64/primary_db                                               | 173 kB  00:00:00
(2/4): base/7/x86_64/group_gz                                                   | 166 kB  00:00:00
(3/4): updates/7/x86_64/primary_db                                              | 4.3 MB  00:00:01
(4/4): base/7/x86_64/primary_db                                                 | 5.9
 
 MB  00:00:06
Determining fastest mirrors
 * base: mirrors.huaweicloud.com
 * extras: mirrors.huaweicloud.com
 
(此處省略6000字安裝信息)......

Installed:
  docker.x86_64 2:1.13.1-68.gitdded712.el7.centos

Dependency Installed:
  audit-libs-python.x86_64 0:2.8.1-3.el7
  checkpolicy.x86_64 0:2.5-6.el7
  container-selinux.noarch 2
 
:2.66-1.el7
  container-storage-setup.noarch 0:0.10.0-1.gitdf0dcd5.el7
  docker-client.x86_64 2:1.13.1-68.gitdded712.el7.centos
  docker-common.x86_64 2:1.13.1-68.gitdded712.el7.centos
  libcgroup.x86_64 0:0.41-15.el7
  libseccomp.x86_64 0:2.3.1-3.el7
  libsemanage-python.x86_64 0:2.5-11.el7
  oci-register-machine.x86_64 1:0-6.git2b44233.el7
  oci-systemd-hook.x86_64 1:0.1.16-1.git05bd9a0.el7
  oci-umount.x86_64 2:2.3.3-3.gite3c9055.el7
  policycoreutils-python.x86_64 0:2.5-22.el7
  python-IPy.noarch 0:0.75-6.el7
  setools-libs.x86_64 0:3.3.8-2.el7
  skopeo-containers.x86_64 1:0.1.31-1.dev.gitae64ff7.el7.centos
  yajl.x86_64 0:2.0.4-4.el7

Dependency Updated:
  audit.x86_64 0:2.8.1-3.el7                    audit-libs.x86_64 0:2.8.1-3.el7
  libselinux.x86_64 0:2.5-12.el7                libselinux-python.x86_64 0:2.5-12.el7
  libselinux-utils.x86_64 0:2.5-12.el7          libsemanage.x86_64 0:2.5-11.el7
  libsepol.x86_64 0:2.5-8.1.el7                 policycoreutils.x86_64 0:2.5-22.el7
  selinux-policy.noarch 0:3.13.1-192.el7_5.4    selinux-policy-targeted.noarch 0:3.13.1-192.el7_5.4

Complete!
#啟動docker
[root@localhost ~]# service docker start
Redirecting to /bin/systemctl start docker.service
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to manage system services or units.
==== AUTHENTICATION COMPLETE ===
[root@localhost ~]#

#設置docker 開機自動啟動
[weiyj@localhost ~]$ systemctl enable docker
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-unit-files ===
Authentication is required to manage system service or unit files.
Authenticating as: root
Password:
==== AUTHENTICATION COMPLETE ===
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
Authentication is required to reload the systemd state.
Authenticating as: root
Password:
==== AUTHENTICATION COMPLETE ===
[weiyj@localhost ~]$

CentOS install docker