Lab1 issue (configure_undercloud.yml:51 fails)

Dear LFS2764 class forum community,

While executing Lab1 of LFS264: OPNFV Fundamentals training I stumbled upon a problem that is blocking my progress: I can create the required VM with 8 vCPUs, 52GB memory and 300GB HDD using an OPNFV Euphrates 5.1 image. I can also manage to login to the VM instance but running the Apex deploy command eventually leads to a failure, as it looks like the undercloud deployment configuration fails (log details below) and i dont even get the point where the overcloud can be deployed.

Since the Lab1 instruction does not cover this scenario (only when the overcloud fails), I wonder if you could help me finding out what is going wrong and how to correct it?

BR /Roberto

2018-07-28 20:13:42,973 INFO: TASK [undercloud install] ******************************************************

task path: /usr/share/opnfv-apex/ansible/playbooks/configure_undercloud.yml:51

fatal: [192.168.122.244]: FAILED! => {"changed": true, "cmd": "openstack undercloud install &> apex-undercloud-install.log", "delta": "0:03:17.487932", "end": "2018-

07-28 20:13:42.897556", "msg": "non-zero return code", "rc": 1, "start": "2018-07-28 20:10:25.409624", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines":

[]}

2018-07-28 20:15:23,785 INFO: TASK [undercloud install retry] ************************************************

task path: /usr/share/opnfv-apex/ansible/playbooks/configure_undercloud.yml:56

fatal: [192.168.122.244]: FAILED! => {"changed": true, "cmd": "openstack undercloud install >> apex-undercloud-install.log 2>&1", "delta": "0:01:40.380201", "end":

"2018-07-28 20:15:23.697637", "msg": "non-zero return code", "rc": 1, "start": "2018-07-28 20:13:43.317436", "stderr": "", "stderr_lines": [], "stdout": "",

"stdout_lines": []}

2018-07-28 20:15:24,441 INFO: TASK [fetch undercloud log] ****************************************************

task path: /usr/share/opnfv-apex/ansible/playbooks/configure_undercloud.yml:61

changed: [192.168.122.244] => {"changed": true, "checksum": "55c7603dccd0883f8aa4bf79ffb5fa255e35be94", "dest": "/tmp/apex_tmps130gdwq/apex-undercloud-install.log",

"md5sum": "f9429cfe8ad6521984947e89c7205c14", "remote_checksum": "55c7603dccd0883f8aa4bf79ffb5fa255e35be94", "remote_md5sum": null}

        to retry, use: --limit @/usr/share/opnfv-apex/ansible/playbooks/configure_undercloud.retry

2018-07-28 20:15:24,442 INFO: PLAY RECAP *********************************************************************

192.168.122.244            : ok=10   changed=8    unreachable=0    failed=2

2018-07-28 20:15:24,499 ERROR: Ansible playbook failed. See Ansible logs for details.

Traceback (most recent call last):

  File "/bin/opnfv-deploy", line 10, in <module>

    sys.exit(main())

  File "/usr/lib/python3.4/site-packages/apex/deploy.py", line 339, in main

    APEX_TEMP_DIR)

  File "/usr/lib/python3.4/site-packages/apex/undercloud/undercloud.py", line 126, in configure

    user='stack')

  File "/usr/lib/python3.4/site-packages/apex/common/utils.py", line 131, in run_ansible

    raise Exception(e)

Exception: Ansible playbook failed. See Ansible logs for details.