[root@test ~]# yum update[root@test ~]# yum install docker [root@test ~]# service docker startRedirecting to /bin/systemctl start docker.serviceJob for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.[root@test ~]# systemctl status docker.service● docker.service - Docker Application Container Engine  Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)  Active: inactive (dead) (Result: exit-code) since 四 2016-03-10 13:01:21 CST; 7s ago   Docs: http://docs.docker.com Process: 29939 ExecStart=/usr/bin/docker daemon $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY (code=exited, status=2) Main PID: 29939 (code=exited, status=2)  CGroup: /system.slice/docker.service      └─29970 mkfs.ext4 -E nodiscard,lazy_itable_init=0,lazy_journal_ini...

[root@apptest ~]# service docker startRedirecting to /bin/systemctl start docker.service

[root@apptest ~]# yum remove docker[root@apptest ~]# yum remove docker-selinux [root@test yum.repos.d]# vi /etc/yum.repos.d/docker.repo [dockerrepo]name=Docker Repositorybaseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/enabled=1gpgcheck=1gpgkey=https://yum.dockerproject.org/gpg [root@test yum.repos.d]# yum install docker-engine 

[root@apptest ~]# service docker startRedirecting to /bin/systemctl start docker.service[root@apptest ~]# docker imagesREPOSITORY     TAG         IMAGE ID      CREATED       SIZE [root@test yum.repos.d]# docker versionClient: Version:   1.10.2 API version: 1.22 Go version:  go1.5.3 Git commit:  c3959b1 Built:    Mon Feb 22 16:16:33 2016 OS/Arch:   linux/amd64 Server: Version:   1.10.2 API version: 1.22 Go version:  go1.5.3 Git commit:  c3959b1 Built:    Mon Feb 22 16:16:33 2016 OS/Arch:   linux/amd64[root@test yum.repos.d]# 

[root@apptest ~]# curl -fsSL https://get.docker.com/ | sh+ sh -c 'sleep 3; yum -y -q install docker-engine'警告：/var/cache/yum/x86_64/7/docker-main-repo/packages/docker-engine-selinux-1.10.2-1.el7.centos.noarch.rpm: 頭V4 RSA/SHA512 Signature, 密鑰 ID 2c52609d: NOKEYdocker-engine-selinux-1.10.2-1.el7.centos.noarch.rpm 的公鑰尚未安裝導入 GPG key 0x2C52609D: 用戶ID   : "Docker Release Tool (releasedocker) <docker@docker.com>" 指紋    : 5811 8e89 f3a9 1289 7c07 0adb f762 2157 2c52 609d 來自    : https://yum.dockerproject.org/gpgsetsebool: SELinux is disabled.+ sh -c 'docker version'Client: Version:   1.10.2 API version: 1.22 Go version:  go1.5.3 Git commit:  c3959b1 Built:    Mon Feb 22 16:16:33 2016 OS/Arch:   linux/amd64Cannot connect to the Docker daemon. Is the docker daemon running on this host? If you would like to use Docker as a non-root user, you should now consideradding your user to the "docker" group with something like:  sudo usermod -aG docker your-user Remember that you will have to log out and back in for this to take effect! [root@apptest ~]#  [root@apptest ~]# service docker startRedirecting to /bin/systemctl start docker.service[root@apptest ~]# docker imagesREPOSITORY     TAG         IMAGE ID      CREATED       SIZE[root@apptest ~]#