Hello, I installed devstack on ubuntu 16.04 LTS amd64, but if I launch the script ./stack, I have following error message: = PIP_FIND_LINKS= SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite /opt/stack/requirements/.venv/bin/pip install -c /opt/stack/requirements/upper-constraints.txt -U pbr env: ‘/opt/stack/requirements/.venv/bin/pip’: No such file or directory +inc/python:pip_install:1 exit_trap +./stack.sh:exit_trap:533 local r=127 ++./stack.sh:exit_trap:534 jobs -p +./stack.sh:exit_trap:534 jobs= +./stack.sh:exit_trap:537 [[ -n '' ]] +./stack.sh:exit_trap:543 '[' -f '' ']' +./stack.sh:exit_trap:548 kill_spinner +./stack.sh:kill_spinner:443 '[' '!' -z '' ']' +./stack.sh:exit_trap:550 [[ 127 -ne 0 ]] +./stack.sh:exit_trap:551 echo 'Error on exit' Error on exit +./stack.sh:exit_trap:553 type -p generate-subunit +./stack.sh:exit_trap:554 generate-subunit 1570254820 95 fail +./stack.sh:exit_trap:556 [[ -z /opt/stack/logs ]] +./stack.sh:exit_trap:559 /opt/stack/devstack/tools/worlddump.py -d /opt/stack/logs World dumping... see /opt/stack/logs/worlddump-2019-10-05-055516.txt for details +./stack.sh:exit_trap:568 exit 127

The reading log's message show: stack@edgard-VirtualBox:~/devstack$ tail /opt/stack/logs/worlddump-2019-10-05-055516.txt

neutron-openvswitch-agent Guru Meditation Report

Skipping as neutron-openvswitch-agent does not appear to be running

cinder-volume Guru Meditation Report

Skipping as cinder-volume does not appear to be running stack@edgard-VirtualBox:~/devstack$

The logs explain that Skipping as neutron-openvswitch-agent does not appear to be running and Skipping as cinder-volume does not appear to be running

Could I have help please?