Ubuntu devstack错误无法找到libvert客户端和libvert守护进程

我正在ubuntu 14.04上安装devstack…我在运行./stack.sh时遇到一个错误。虽然我已经安装了libvert守护进程，但是这个错误来了..这就是错误

Reading state information... Done
E: Unable to locate package libvirt-clients
E: Unable to locate package libvirt-daemon-system
+functions-common:apt_get:1                exit_trap
+./stack.sh:exit_trap:488                  local r=100
++./stack.sh:exit_trap:489                  jobs -p
+./stack.sh:exit_trap:489                  jobs=
+./stack.sh:exit_trap:492                  [[ -n '' ]]
+./stack.sh:exit_trap:498                  kill_spinner
+./stack.sh:kill_spinner:384               '[' '!' -z '' ']'
+./stack.sh:exit_trap:500                  [[ 100 -ne 0 ]]
+./stack.sh:exit_trap:501                  echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:50 generate-subunit        1492099156 202 fail
+./stack.sh:exit_trap:503                  [[ -z /opt/stack/logs ]]
+./stack.sh:exit_trap:506                      
/home/nandhini/devstack/tools/worlddump.py -d /opt/stack/logs
World dumping... see /opt/stack/logs/worlddump-2017-04-13-160239.txt    
for details
+./stack.sh:exit_trap:512                  exit 100

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Devstack的编写要求Ubuntu Xenial或更新版本-您的14.04版本不再受AFAICT支持