Ubuntu15.10 is not officially supported by Hortonworks HDP2.3.
This image offers repository setting and slight code hack to make ambari-server and agent run on ubuntu15.
Note!) To start hdp2.3 installation via ambari do following inside docker container.
configure ssh-keys and run ssh server and ntp server
# service ssh start # service ntp start # ambari-server setup (or reset) # ambari-server start
expose 8080 port to host, then access docker_container:8080/
ID / PW = admin / admin