Open Stack

I'm installing DevStack in Ubuntu 18.04. I'm using stable/stein branch for
the installation. When I running the stach.sh I'm getting following error.
I have updated the timeout to 300 seconds as well. But still I'm not able
to run the DevStack. Could you please help me on this issue? Is there
specific python version do I need to install. In my PC I have python
version 3.6.8.

++::                                        curl -g -k --noproxy '*' -s -o
/dev/null -w '%{http_code}' http://192.168.9.10/image
+::                                        [[ 503 == 503 ]]
+::                                        sleep 1
+functions:wait_for_service:431            rval=124
+functions:wait_for_service:436            time_stop wait_for_service
+functions-common:time_stop:2317           local name
+functions-common:time_stop:2318           local end_time
+functions-common:time_stop:2319           local elapsed_time
+functions-common:time_stop:2320           local total
+functions-common:time_stop:2321           local start_time
+functions-common:time_stop:2323           name=wait_for_service
+functions-common:time_stop:2324           start_time=1562654135525
+functions-common:time_stop:2326           [[ -z 1562654135525 ]]
++functions-common:time_stop:2329           date +%s%3N
+functions-common:time_stop:2329           end_time=1562654195603
+functions-common:time_stop:2330           elapsed_time=60078
+functions-common:time_stop:2331           total=93
+functions-common:time_stop:2333           _TIME_START[$name]=
+functions-common:time_stop:2334           _TIME_TOTAL[$name]=60171
+functions:wait_for_service:437            return 124
+lib/glance:start_glance:353               die 353 'g-api did not start'
+functions-common:die:195                  local exitcode=0
[Call Trace]
./stack.sh:1261:start_glance
/opt/stack/devstack/lib/glance:353:die
[ERROR] /opt/stack/devstack/lib/glance:353 g-api did not start
Error on exit
Traceback (most recent call last):
  File "/opt/stack/devstack/tools/worlddump.py", line 255, in <module>
    sys.exit(main())
  File "/opt/stack/devstack/tools/worlddump.py", line 239, in main

Thanks !

-- 
Regards,
Manula Chathurika Thantriwatte
phone : (+94) 772492511
email : manulachathurika at gmail.com
Linkedin : *http://lk.linkedin.com/in/manulachathurika
<http://lk.linkedin.com/in/manulachathurika>*
blog : http://manulachathurika.blogspot.com/
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