[ubuntu] devstack으로 openstack 설치시 에러

+inc/python:pip_install:351                [[ -e pbr/test-requirements.txt ]]
+inc/python:pip_install:359                env http_proxy= https_proxy= no_proxy= 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:516                  local r=127
++./stack.sh:exit_trap:517                  jobs -p
+./stack.sh:exit_trap:517                  jobs=
+./stack.sh:exit_trap:520                  [[ -n '' ]]
+./stack.sh:exit_trap:526                  '[' -f '' ']'
+./stack.sh:exit_trap:531                  kill_spinner
+./stack.sh:kill_spinner:430               '[' '!' -z '' ']'
+./stack.sh:exit_trap:533                  [[ 127 -ne 0 ]]
+./stack.sh:exit_trap:534                  echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:536                  type -p generate-subunit
+./stack.sh:exit_trap:537                  generate-subunit 1592059238 24 fail
+./stack.sh:exit_trap:539                  [[ -z /opt/stack/logs ]]
+./stack.sh:exit_trap:542                  /home/stack/devstack/tools/worlddump.py -d /opt/stack/logs
World dumping... see /opt/stack/logs/worlddump-2020-06-13-144102.txt for details
+./stack.sh:exit_trap:551                  exit 127

위와 같이 오류가 발생하는데, 권한 문제인걸로 판명

sudo chown -R stack:stack /opt/stack

이걸로 해결 가능했다.