=== Pre-req: Install Docker ===
{{{
    https://docs.docker.com/engine/installation/
}}}
=== Pull the centos latest image ===
{{{
     # docker pull centos:latest
}}}
=== Startup the container and install xpra ===
{{{
    hostname# docker run -it centos:latest /bin/bash
    a370b5e014ca# cd /etc/yum.repo.d
    a370b5e014ca# curl -O https://winswitch.org/downloads/CentOS/winswitch.repo
    a370b5e014ca# yum repolist
    a370b5e014ca# yum install xpra
}}}

=== Tips ===
* If you hit fakesystemd error during install xpra
{{{
   fakesystemd-1-17.el7.centos.noarch has installed conflicts systemd: fakesystemd-1-17.el7.centos.noarch
}}}
Please refer to [http://seven.centos.org/2015/12/fixing-centos-7-systemd-conflicts-with-docker/  fixing-centos-7-systemd-conflicts-with-docker]