See also: wiki/Usage/Docker.

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 -h container -p 192.168.99.100:10010:10010 centos:latest /bin/bash
    root@container# cd /etc/yum.repo.d
    root@container# curl -O https://winswitch.org/downloads/CentOS/winswitch.repo
    root@container# yum repolist
    root@container# yum install xpra

Install dependency packages

• You may hit bellow error if you run xpra in container now:

    /bin/xpra_Xdummy: line 52: which: command not found
     failed to locate Xorg binary to run
     2015-12-23 16:19:11,020
     2015-12-23 16:19:11,024 Xvfb command has terminated! xpra cannot continue
  

  this is because xvfb and which is not installed on centos7.2 official image. We need to install it

      root@container#yum install  xorg-x11-server-Xvfb
      root@container#yum install which
  

Generate uuid for container

• You may hit ​UUID problem:

     D-Bus library appears to be incorrectly set up; failed to read machine uuid: UUID file 
     '/etc/machine-id'       should contain a hex string of length 32, not length 0, with no other text
  

which can be resolved by:

    root@container#dbus-uuidgen >/etc/machine-id

Run xpra in container

• Create a new user in container:

      root@container# useradd -m xpra1
     root@container# passwd xpra1
  

• Start xpra server with the created user (you may need to yum install emacs if you also want to run emacs):

    root@container# su - xpra1
    xpra1@container$ xpra start :100 --start-child=emacs --bind-tcp=0.0.0.0:10010
  

• After that you can connect with xpra client!!

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 ​fixing-centos-7-systemd-conflicts-with-docker