I am following the documentation https://docs.openstack.org/project-deploy-guide/kolla-ansible/xena/quickstar... 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