Description of problem:
When joining a machine to IPA via realmd during the machine installation with
anaconda kickstart, the ipa uninstall crashes. I was not able to reproduce this
issue under other conditions, only just after installation and joining via
anaconda. It seems that ipa client ties to start the chronyd service, but as it
is not installed it crashes. I think it should handle the situation more
clearly.

Version-Release number of selected component (if applicable):
ipa-client-3.3.3-25.el7

How reproducible:
always

Steps to Reproduce:
1/ Install a machine with kickstart and join it to IPA; I use the following
kickstart file:

text
zerombr
bootloader --location=mbr
clearpart --all --initlabel
autopart
logging --level=debug
rootpw --plaintext redhat
firewall --disabled
keyboard us
lang en_US
timezone --isUtc America/New_York
network --bootproto=static --device=eth0 --gateway=192.168.100.1
--ip=192.168.100.72 --netmask=255.255.255.0 --nameserver=10.34.37.24
--hostname=rhel72.ipa.baseos.qe --noipv6 --activate
reboot

realm join --one-time-password=MyPassword ipa.baseos.qe

%packages --ignoremissing
wget
make
@core
%end

2/ After the installation log into the machine and try remove it from IPA:

[root@rhel72 ~]# /usr/sbin/ipa-client-install --uninstall --unattended
Unenrolling client from IPA server
Removing Kerberos service principals from /etc/krb5.keytab
Disabling client Kerberos and LDAP configurations
Redundant SSSD configuration file /etc/sssd/sssd.conf was moved to
/etc/sssd/sssd.conf.deleted
Restoring client configuration files
nscd daemon is not installed, skip configuration
nslcd daemon is not installed, skip configuration
Traceback (most recent call last):
  File "/usr/sbin/ipa-client-install", line 2597, in <module>
    sys.exit(main())
  File "/usr/sbin/ipa-client-install", line 2569, in main
    return uninstall(options, env)
  File "/usr/sbin/ipa-client-install", line 619, in uninstall
    ipaclient.ntpconf.restore_forced_ntpd(statestore)
  File "/usr/lib/python2.7/site-packages/ipaclient/ntpconf.py", line 224, in
restore_forced_ntpd
    service.start()
  File "/usr/lib/python2.7/site-packages/ipapython/platform/base/systemd.py",
line 119, in start
    ipautil.run(["/bin/systemctl", "start",
self.service_instance(instance_name)], capture_output=capture_output)
  File "/usr/lib/python2.7/site-packages/ipapython/ipautil.py", line 328, in
run
    raise CalledProcessError(p.returncode, arg_string, stdout)
subprocess.CalledProcessError: Command '/bin/systemctl start chronyd.service'
returned non-zero exit status 6

The second attempt seems to be successful:

[root@rhel72 log]#
[root@rhel72 log]# /usr/sbin/ipa-client-install --uninstall --unattended
Unenrolling client from IPA server
Unenrolling host failed: Error getting default Kerberos realm: Configuration
file does not specify default realm.

Removing Kerberos service principals from /etc/krb5.keytab
Failed to remove Kerberos service principals: Command '/usr/sbin/ipa-rmkeytab
-k /etc/krb5.keytab -r IPA.BASEOS.QE' returned non-zero exit status 5
Disabling client Kerberos and LDAP configurations
Redundant SSSD configuration file /etc/sssd/sssd.conf was moved to
/etc/sssd/sssd.conf.deleted
nscd daemon is not installed, skip configuration
nslcd daemon is not installed, skip configuration
Client uninstall complete.