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I am trying to set up Tripleo for Newton (why Newton you ask? The
RHCSA/RHOSP exam is based on Newton). Unexpectedly, I run into a brick
wall when deploying the undercloud. *Any suggestions how to troubleshoot
this?*

The last messages are:

puppet apply exited with exit code 6
+ '[' 6 '!=' 2 -a 6 '!=' 0 ']'
+ exit 6
[2018-11-05 00:47:13,779] (os-refresh-config) [ERROR] during
configure phase. [Command '['dib-run-parts',
'/usr/libexec/os-refresh-config/configure.d']' returned non-zero
exit status 1]

[2018-11-05 00:47:13,779] (os-refresh-config) [ERROR] Aborting...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File
"/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py",
line 1258, in install
    _run_orc(instack_env)
  File
"/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py",
line 1022, in _run_orc
    _run_live_command(args, instack_env, 'os-refresh-config')
  File
"/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py",
line 522, in _run_live_command
    raise RuntimeError('%s failed. See log for details.' % name)
RuntimeError: os-refresh-config failed. See log for details.

Neither /var/log nor /opt have any trace of os-refresh-config. *Where
should I look for log? *And***where do I find more information about the
**/puppet apply /**error? /var/log/puppet is empty.*

~/.instack/install-undercloud.log contains one other message labeled
with "error". Not sure if it's relevant:

Error: /Stage[main]/Keystone::Roles::Admin/Keystone_user[admin]:
Could not evaluate: Execution of '/bin/openstack token issue
--format value' returned 1: Certificate did not match expected
hostname: 192.168.126.2. Certificate: {'subjectAltName': (('DNS',
'192.168.126.2'),), 'notBefore': u'Nov  4 15:04:13 2018 GMT',
'serialNumber': u'03553ED8BBF040FEAF44FE8C95A45CB2', 'notAfter':
'Nov  4 14:58:20 2019 GMT', 'version': 3L, 'subject':
((('commonName', u'192.168.126.2'),),), 'issuer': ((('commonName',
u'Local Signing Authority'),), (('commonName',
u'03553ed8-bbf040fe-af44fe8c-95a45cb1'),))}
SSL exception connecting to
https://192.168.126.2:13000/v3/auth/tokens: *hostname
'192.168.126.2' doesn't match '192.168.126.2'* (tried 21, for a
total of 170 seconds)^[.[.0m

So it seems that hostname 192.168.126.2 doesn't match 192.168.126.2.
*How can I convince SSL that they do actually match?*

To get to this point, I followed the steps in the Tripleo install guide
<http://tripleo.org/install/installation/installation.html#installing-the-undercloud>.
The undercloud.conf is almost verbatim from Keith Tenzer's blog
<https://keithtenzer.com/2017/04/20/red-hat-openstack-platform-10-newton-installation-and-configuration-guide/>:

[DEFAULT]

# local interface is connected to the provisioning network
# which is used to PXE-install the overcloud nodes
local_interface = eth0
local_ip = 192.168.126.1/24
undercloud_public_vip = 192.168.126.2
undercloud_admin_vip = 192.168.126.3

masquerade_network = 192.168.126.0/24
dhcp_start = 192.168.126.100
dhcp_end = 192.168.126.150
network_cidr = 192.168.126.0/24
network_gateway = 192.168.126.1
inspection_iprange = 192.168.126.30,192.168.126.99
generate_service_certificate = true
certificate_generation_ca = local