I try to install Openstack using kolla, but it's a error when I check the system before installation : # kolla-ansible -i ./multinode prechecks PLAY RECAP **************************************************************************** *********************************** compute01 : ok=28 changed=0 unreachable=0 failed=0 skipped=24 rescued=0 ignored=0 control01 : ok=65 changed=0 unreachable=0 failed=0 skipped=59 rescued=0 ignored=0 control02 : ok=62 changed=0 unreachable=0 failed=0 skipped=53 rescued=0 ignored=0 control03 : ok=62 changed=0 unreachable=0 failed=0 skipped=53 rescued=0 ignored=0 localhost : ok=6 changed=0 unreachable=0 failed=1 skipped=2 rescued=0 ignored=0 monitoring01 : ok=18 changed=0 unreachable=0 failed=0 skipped=15 rescued=0 ignored=0 network01 : ok=47 changed=0 unreachable=0 failed=0 skipped=109 rescued=0 ignored=0 network02 : ok=47 changed=0 unreachable=0 failed=0 skipped=105 rescued=0 ignored=0 storage01 : ok=18 changed=0 unreachable=0 failed=0 skipped=15 rescued=0 ignored=0 The error is : The full traceback is: Traceback (most recent call last): File "/root/.ansible/tmp/ansible-tmp-1629813578.505786-101978-263600932037331/Ans iballZ_kolla_container_facts.py", line 102, in <module> _ansiballz_main() File "/root/.ansible/tmp/ansible-tmp-1629813578.505786-101978-263600932037331/Ans iballZ_kolla_container_facts.py", line 94, in _ansiballz_main invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS) File "/root/.ansible/tmp/ansible-tmp-1629813578.505786-101978-263600932037331/Ans iballZ_kolla_container_facts.py", line 40, in invoke_module runpy.run_module(mod_name='ansible.modules.kolla_container_facts', init_globals=None, run_name='__main__', alter_sys=True) File "/usr/lib64/python3.6/runpy.py", line 205, in run_module return _run_module_code(code, init_globals, run_name, mod_spec) File "/usr/lib64/python3.6/runpy.py", line 96, in _run_module_code mod_name, mod_spec, pkg_name, script_name) File "/usr/lib64/python3.6/runpy.py", line 85, in _run_code exec(code, run_globals) File "/tmp/ansible_kolla_container_facts_payload_v95779u3/ansible_kolla_container _facts_payload.zip/ansible/modules/kolla_container_facts.py", line 18, in <module> ModuleNotFoundError: No module named 'docker' fatal: [localhost]: FAILED! => { "changed": false, "module_stderr": "Traceback (most recent call last):\n File \"/root/.ansible/tmp/ansible-tmp-1629813578.505786-101978-263600932037331/An siballZ_kolla_container_facts.py\", line 102, in <module>\n _ansiballz_main()\n File \"/root/.ansible/tmp/ansible-tmp-1629813578.505786-101978-263600932037331/An siballZ_kolla_container_facts.py\", line 94, in _ansiballz_main\n invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)\n File \"/root/.ansible/tmp/ansible-tmp-1629813578.505786-101978-263600932037331/An siballZ_kolla_container_facts.py\", line 40, in invoke_module\n runpy.run_module(mod_name='ansible.modules.kolla_container_facts', init_globals=None, run_name='__main__', alter_sys=True)\n File \"/usr/lib64/python3.6/runpy.py\", line 205, in run_module\n return _run_module_code(code, init_globals, run_name, mod_spec)\n File \"/usr/lib64/python3.6/runpy.py\", line 96, in _run_module_code\n mod_name, mod_spec, pkg_name, script_name)\n File \"/usr/lib64/python3.6/runpy.py\", line 85, in _run_code\n exec(code, run_globals)\n File \"/tmp/ansible_kolla_container_facts_payload_v95779u3/ansible_kolla_containe r_facts_payload.zip/ansible/modules/kolla_container_facts.py\", line 18, in <module>\nModuleNotFoundError: No module named 'docker'\n", "module_stdout": "", "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", "rc": 1 } I installed the docker package on the deploy localhost and run again, but it still raise the same error. What is it ? And does it effect the install ? Thanks!