[2/31]: configuring certificate server instance
ipa.ipaserver.install.cainstance.CAInstance: CRITICAL Failed to configure CA
instance: Command '/usr/sbin/pkispawn -s CA -f /tmp/tmpD4KOGu' returned
non-zero exit status 1
ipa.ipaserver.install.cainstance.CAInstance: CRITICAL See the installation logs
and the following files/directories for more information:
ipa.ipaserver.install.cainstance.CAInstance: CRITICAL   /var/log/pki/pki-tomcat
  [error] RuntimeError: CA configuration failed.
ipa.ipapython.install.cli.install_tool(Server): ERROR    CA configuration
failed.
ipa.ipapython.install.cli.install_tool(Server): ERROR    The ipa-server-install
command failed. See /var/log/ipaserver-install.log for more information

1. Run ipa-server-install on system / in container where package hostname is
not installed.

ipa-server-install fails.

In the ipaserver-install.log, there is
2016-07-08T12:30:43Z DEBUG Starting external process
2016-07-08T12:30:43Z DEBUG args=/usr/sbin/pkispawn -s CA -f /tmp/tmpD4KOGu
2016-07-08T12:30:43Z DEBUG Process finished, return code=1
2016-07-08T12:30:43Z DEBUG stdout=
2016-07-08T12:30:43Z DEBUG stderr=Traceback (most recent call last):
  File "/usr/sbin/pkispawn", line 802, in <module>
    main(sys.argv)
  File "/usr/sbin/pkispawn", line 92, in main
    dnsdomainname = subprocess.check_output(["dnsdomainname"])
  File "/usr/lib64/python2.7/subprocess.py", line 568, in check_output
    process = Popen(stdout=PIPE, *popenargs, **kwargs)
  File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

2016-07-08T12:30:43Z CRITICAL Failed to configure CA instance: Command
'/usr/sbin/pkispawn -s CA -f /tmp/tmpD4KOGu' returned non-zero exit status 1
2016-07-08T12:30:43Z CRITICAL See the installation logs and the following
files/directories for more information:
2016-07-08T12:30:43Z CRITICAL   /var/log/pki/pki-tomcat
2016-07-08T12:30:43Z DEBUG Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ipaserver/install/service.py", line
448, in start_creation

If pkispawn calls dnsdomainname unconditionally, it should require rpm to get
it installed.