The version of Docker CE that works for us on RHEL7.4 is 17.03.02

Post login

Step 1 is to add the Docker CE repo like so

 yum install -y yum-utils
 yum-config-manager --add-repo \
       https://download.docker.com/linux/centos/docker-ce.repo
 yum makecache fast

If you tried to install Docker CE on RHEL7.4 using yum-install you might get

---> Package libtool-ltdl.x86_64 0:2.4.2-22.el7_3 will be installed
--> Finished Dependency Resolution
Error: Package: docker-ce-17.09.0.ce-1.el7.centos.x86_64 (docker-ce-stable)
           Requires: container-selinux >= 2.9
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

The reason this fails is that the latest version of Docker CE is not supported on RHEL7.4. You need to install the 17.03.02 version. Use this command

 yum install --setopt=obsoletes=0 \
   docker-ce-17.03.2.ce-1.el7.centos.x86_64 \
   docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch

Then the usual systemctl start docker ought to get you going.

The good news here is Docker is probably already installed.

If you dont find it, use YAST and enable the Container module. For more instructions https://github.com/Shopify/docker/blob/master/docs/installation/linux/SUSE.md