产生问题的安装步骤

1. sudo yum-config-manager -y --add-repo https://download.docker.com/linux/centos/docker-ce.repo
2. sudo yum install -y docker-ce-17.03.1.ce-1.el7.centos

异常信息

Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 0:17.03.1.ce-1.el7.centos will be installed
--> Processing Dependency: docker-ce-selinux >= 17.03.1.ce-1.el7.centos for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64
Package docker-ce-selinux is obsoleted by docker-ce, but obsoleting package does not provide for requirements
--> Processing Dependency: libcgroup for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64
--> Processing Dependency: libseccomp.so.2()(64bit) for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64
--> Processing Dependency: libltdl.so.7()(64bit) for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64
--> Running transaction check
---> Package docker-ce.x86_64 0:17.03.1.ce-1.el7.centos will be installed
--> Processing Dependency: docker-ce-selinux >= 17.03.1.ce-1.el7.centos for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64
Package docker-ce-selinux is obsoleted by docker-ce, but obsoleting package does not provide for requirements
---> Package libcgroup.x86_64 0:0.41-11.el7 will be installed
---> Package libseccomp.x86_64 0:2.3.1-2.el7 will be installed
---> Package libtool-ltdl.x86_64 0:2.4.2-22.el7_3 will be installed
--> Finished Dependency Resolution
Error: Package: docker-ce-17.03.1.ce-1.el7.centos.x86_64 (docker-ce-stable)
           Requires: docker-ce-selinux >= 17.03.1.ce-1.el7.centos
           Available: docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch (docker-ce-stable)
               docker-ce-selinux = 17.03.0.ce-1.el7.centos
           Available: docker-ce-selinux-17.03.1.ce-1.el7.centos.noarch (docker-ce-stable)
               docker-ce-selinux = 17.03.1.ce-1.el7.centos
           Available: docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch (docker-ce-stable)
               docker-ce-selinux = 17.03.2.ce-1.el7.centos
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

 异常分析解决

A new obsoletes restriction was introduced in docker-ce 17.06.0 and it looks like the yum repo is applying it to all versions of the docker-ce indiscriminately. To work around this when installing older versions of docker-ce, you can pass a flag to ignore obsoletes:

总之，一句话，安装较早版本的docker时，忽略obsoletes即可

$ yum install -y --setopt=obsoletes=0 \
  docker-ce-17.03.1.ce-1.el7.centos \
  docker-ce-selinux-17.03.1.ce-1.el7.centos