Description of problem:
After a fresh install of RHEL 8.0, attempted an undercloud install. It failed due to missing rsyslog:
[stack@undercloud undercloud-ansible-54348tim]$ cat ansible-errors.json
{"hardprov-dl360-g9-01": [["Check if rsyslog exists", {"msg": "non-zero return code", "cmd": "systemctl is-active rsyslog", "stdout": "inactive", "stderr": "", "rc": 3, "start": "2019-10-02 01:52:11.855265", "end": "2019-10-02 01:52:11.862984", "delta": "0:00:00.007719", "changed": true, "invocation": {"module_args": {"_raw_params": "systemctl is-active rsyslog", "_uses_shell": true, "warn": true, "stdin_add_newline": true, "strip_empty_ends": true, "argv": null, "chdir": null, "executable": null, "creates": null, "removes": null, "stdin": null}}, "stdout_lines": ["inactive"], "stderr_lines": [], "_ansible_no_log": false}]]}[stack@hardprov-dl360-g9-01 undercloud-ansible-54348tim]
Can workaround this by installing rsyslog manually:
$ sudo dnf install rsyslog
$ systemctl start rsyslog.service
rsyslog appears to be required for haproxy and swift