I am following the documentation 

 https://docs.openstack.org/project-deploy-guide/kolla-ansible/xena/quickstart.html#host-machine-requirements

on VM with Debian 10 distro

But I am getting the errors as follows . Here is my /etc/hosts   whats wrong here ??

##############################################

(venv) cloud@Xena:~$ cat /etc/hosts
127.0.0.1 localhost
#127.0.1.1 Xena

#10.184.48.94 localhost Xena
# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

# BEGIN ANSIBLE GENERATED HOSTS
10.184.48.94 Xena
# END ANSIBLE GENERATED HOSTS
(venv) cloud@Xena:~$ 

###################################################

ERROR    fatal: [localhost]: FAILED! => {"changed": false, "module_stderr": "sudo: a password is required\n", "module_stdout": "", "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", "rc": 1}

I am trying this installation on a Virtual Machine on Debian 10 OS. 

(venv) cloud@Xena:~$ kolla-ansible -i ./all-in-one  bootstrap-servers
Bootstrapping servers : ansible-playbook -e @/etc/kolla/globals.yml  -e @/etc/kolla/passwords.yml -e CONFIG_DIR=/etc/kolla  -e kolla_action=bootstrap-servers /home/cloud/venv/share/kolla-ansible/ansible/kolla-host.yml  --inventory ./all-in-one
[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details

PLAY [Gather facts for all hosts] ***************************************************************************************************************************************

TASK [Gather facts] *****************************************************************************************************************************************************
ok: [localhost]

TASK [Group hosts to determine when using --limit] **********************************************************************************************************************
ok: [localhost]
[WARNING]: Could not match supplied host pattern, ignoring: all_using_limit_True

PLAY [Gather facts for all hosts (if using --limit)] ********************************************************************************************************************
skipping: no hosts matched

PLAY [Apply role baremetal] *********************************************************************************************************************************************

TASK [baremetal : include_tasks] ****************************************************************************************************************************************
included: /home/cloud/venv/share/kolla-ansible/ansible/roles/baremetal/tasks/bootstrap-servers.yml for localhost

TASK [baremetal : Ensure localhost in /etc/hosts] ***********************************************************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "module_stderr": "sudo: a password is required\n", "module_stdout": "", "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", "rc": 1}

PLAY RECAP **************************************************************************************************************************************************************
localhost                  : ok=3    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0  

Command failed ansible-playbook -e @/etc/kolla/globals.yml  -e @/etc/kolla/passwords.yml -e CONFIG_DIR=/etc/kolla  -e kolla_action=bootstrap-servers /home/cloud/venv/share/kolla-ansible/ansible/kolla-host.yml  --inventory ./all-in-one
(venv) cloud@Xena:~$ 

Any hints welcome.

Thank you all

krish