安装devstack，出的错

Collecting msgpack-python===0.4.8 (from -c /opt/stack/tempest/.tox/tempest/log/upper-constraints.txt (line 244))
  Could not find a version that satisfies the requirement msgpack-python===0.4.8 (from -c /opt/stack/tempest/.tox/tempest/log/upper-constraints.txt (line 244))
(from versions: )
No matching distribution found for msgpack-python===0.4.8 (from -c /opt/stack/tempest/.tox/tempest/log/upper-constraints.txt (line 244))

ERROR: could not install deps [-r/opt/stack/tempest/requirements.txt]; v = InvocationError('/opt/stack/tempest/tools/tox_install.sh https://git.openstack.org/cgit/o ... per-constraints.txt -r/opt/stack/tempest/requirements.txt (see /opt/stack/tempest/.tox/tempest/log/full-1.log)', 1)
___________________________________ summary ____________________________________
ERROR:   full: could not install deps [-r/opt/stack/tempest/requirements.txt]; v = InvocationError('/opt/stack/tempest/tools/tox_install.sh https://git.openstack.org/cgit/o ... per-constraints.txt -r/opt/stack/tempest/requirements.txt (see /opt/stack/tempest/.tox/tempest/log/full-1.log)', 1)
+lib/tempest:install_tempest:1             exit_trap
+./stack.sh:exit_trap:521                  local r=1
++./stack.sh:exit_trap:522                  jobs -p
+./stack.sh:exit_trap:522                  jobs=
+./stack.sh:exit_trap:525                  [[ -n '' ]]
+./stack.sh:exit_trap:531                  '[' -f '' ']'
+./stack.sh:exit_trap:536                  kill_spinner
+./stack.sh:kill_spinner:417               '[' '!' -z '' ']'
+./stack.sh:exit_trap:538                  [[ 1 -ne 0 ]]
+./stack.sh:exit_trap:539                  echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:540                  generate-subunit 1502242399 709 fail
+./stack.sh:exit_trap:541                  [[ -z /opt/stack/logs ]]
+./stack.sh:exit_trap:544                  /opt/stack/devstack/tools/worlddump.py -d /opt/stack/logs
World dumping... see /opt/stack/logs/worlddump-2017-08-09-014508.txt for details
+./stack.sh:exit_trap:550                  exit 1
stack@block1:~/devstack$                              

缺少依赖包，没有找到对应的版本。尝试安装下

pip install msgpack-python