Bug 1804083

Description of problem:
When trying to scaleup a RHEL worker to existing UPI on OSP cluster,
the ansible procedure stuck at the loop `TASK [openshift_node : Wait for bootstrap endpoint to show up]`.

my scenario is, 
1. I create the RHEL worker with the same subnet for the RHCOS worker,
2. I also create a floating ip for the RHEL worker to make the worker can be sshed from the outside for jenkins slave


After I add new rules for the external_network subnet range(which the RHEL worker floating ip belong to), the openshift-ansbile back to work.


Version-Release number of the following components:
rpm -q openshift-ansible
rpm -q ansible
ansible --version

How reproducible:

Steps to Reproduce:
1. Setup a UPI on OSP cluster according to https://github.com/openshift/installer/blob/release-4.4/docs/user/openstack/install_upi.md
2. Scaleup a RHEL worker according to https://github.com/openshift/openshift-ansible/blob/release-4.4/README.md
3.

Actual results:

TASK [openshift_node : Wait for bootstrap endpoint to show up] *****************
Tuesday 18 February 2020  10:56:10 +0800 (0:00:00.406)       0:03:09.745 ****** 
FAILED - RETRYING: Wait for bootstrap endpoint to show up (60 retries left).
FAILED - RETRYING: Wait for bootstrap endpoint to show up (59 retries left).
...
FAILED - RETRYING: Wait for bootstrap endpoint to show up (2 retries left).
FAILED - RETRYING: Wait for bootstrap endpoint to show up (1 retries left).
fatal: [wjuos442181-5sf8q-rhel-0.wjuos442181.qe.devcluster.openshift.com]: FAILED! => {"attempts": 60, "changed": false, "content": "", "elapsed": 30, "msg": "Status code was -1 and not [200]: Request failed: <urlopen error timed out>", "redirected": false, "status": -1, "url": "https://api.wjuos442181.qe.devcluster.openshift.com:22623/config/worker"}

PLAY RECAP *********************************************************************
localhost                  : ok=1    changed=1    unreachable=0    failed=0    skipped=3    rescued=0    ignored=0   
wjuos442181-5sf8q-rhel-0.wjuos442181.qe.devcluster.openshift.com : ok=15   changed=9    unreachable=0    failed=1    skipped=2    rescued=0    ignored=0   

Tuesday 18 February 2020  11:37:05 +0800 (0:40:54.601)       0:44:04.346 ****** 
=============================================================================== 
openshift_node : Wait for bootstrap endpoint to show up -------------- 2454.60s
openshift_node : Install openshift support packages ------------------- 121.96s
openshift_node : Install openshift packages ---------------------------- 60.98s
openshift_node : Get cluster nodes -------------------------------------- 1.20s
openshift_node : Setting sebool container_manage_cgroup ----------------- 1.13s
openshift_node : Enable the CRI-O service ------------------------------- 0.75s
openshift_node : Get kubernetes server version -------------------------- 0.63s
openshift_node : Enable IP Forwarding ----------------------------------- 0.43s
openshift_node : Enable persistent storage on journal ------------------- 0.43s
openshift_node : Create temp directory ---------------------------------- 0.41s
openshift_node : Disable swap ------------------------------------------- 0.40s
openshift_node : Get cluster version ------------------------------------ 0.36s
openshift_node : Disable firewalld service ------------------------------ 0.32s
openshift_node : include_tasks ------------------------------------------ 0.12s
openshift_node : Fail if new_workers group contains active nodes -------- 0.08s
openshift_node : Set fact l_kubernetes_version -------------------------- 0.08s
openshift_node : include_tasks ------------------------------------------ 0.08s
openshift_node : Set fact l_cluster_version ----------------------------- 0.07s
openshift_node : Override kubernetes version when running CI ------------ 0.07s
openshift_node : Override cluster version when running CI --------------- 0.07s

Expected results:

Additional info:
Please attach logs from ansible-playbook with the -vvv flag