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DevStack installation failure,call for help!

I am new to OpenStack and attempt to set up the lab environment for further study. My installation was based on the official recommended ubuntu 16.04, followed the document The process was interrupted , display the following error information:

 +functions-common:is_service_enabled:1939  local xtrace
++functions-common:is_service_enabled:1940  grep xtrace
++functions-common:is_service_enabled:1940  set +o
+functions-common:is_service_enabled:1940  xtrace='set -o xtrace'
+functions-common:is_service_enabled:1941  set +o xtrace
+functions-common:is_service_enabled:1969  return 0
+lib/cinder:create_volume_types:539        openstack --os-region-name=RegionOne volume type create --property volume_backend_name=lvmdriver-1 lvmdriver-1
Internal Server Error (HTTP 500)
+lib/cinder:create_volume_types:1          exit_trap
+./                  local r=1
++./                  jobs -p
+./                  jobs=
+./                  [[ -n '' ]]
+./                  '[' -f /tmp/tmp.gXvKpFsRPi ']'
+./                  rm /tmp/tmp.gXvKpFsRPi
+./                  kill_spinner
+./               '[' '!' -z '' ']'
+./                  [[ 1 -ne 0 ]]
+./                  echo 'Error on exit'
Error on exit
+./                  type -p generate-subunit
+./                  generate-subunit 1551530639 2641 fail
+./                  [[ -z /opt/stack/logs ]]
+./                  /opt/stack/devstack/tools/ -d /opt/stack/logs
World dumping... see /opt/stack/logs/worlddump-2019-03-0    2-132802.txt for details
neutron-dhcp-agent: no process found
neutron-l3-agent: no process found
neutron-metadata-agent: no process found
neutron-openvswitch-agent: no process found
+./                  exit 1

Meanwhile I reviewed the log file , it notified that:

*** Failed to run 'killall -e -USR2 neutron-dhcp-agent': Command 'killall -e -USR2 neutron-dhcp-agent' returned non-zero exit status 1
guru meditation report in neutron-dhcp-agent log

neutron-l3-agent Guru Meditation Report

killall -e -USR2 neutron-l3-agent

*** Failed to run 'killall -e -USR2 neutron-l3-agent': Command 'killall -e -USR2 neutron-l3-agent' returned non-zero exit status 1
guru meditation report in neutron-l3-agent log

neutron-linuxbridge-agent Guru Meditation Report

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

neutron-metadata-agent Guru Meditation Report

killall -e -USR2 neutron-metadata-agent

*** Failed to run 'killall -e -USR2 neutron-metadata-agent': Command 'killall -e -USR2 neutron-metadata-agent' returned non-zero exit status 1
guru meditation report in neutron-metadata-agent log
Type  :quit<enter>  to exit Vim                                  827,5         97%