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After crack all around the place.. finally found the issue.. there is a few things that need to be monitored..

  1. monitor the syslog: here i found out below error

    apparmor="DENIED" operation="capable" parent=1 profile="/usr/sbin/libvirtd" pid=2217 comm="libvirtd" pid=2217 comm="libvirtd" capability=29 capname="audit_write"

seems like apparmor is blocking libvirt from running script. the solution is to allow libvirt running "audit_write". you can do this by adding into this fil /etc/apparmor.d/usr.sbin.libvirtd. syntax is

capability audit_write,

then found issue on vnc not able to run. need to correct the /etc/nova/nova.conf on compute server. to add below line.

my_ip=computeip
vncserver_listen=computeip
vncserver_proxyclient_address=computeip
novncproxy_base_url=http://controllerip:6080/vnc_auto.html

the above line will allow vnc to listen on compute ip address and you can access the VM console from horizon. seems like everything fine now. :)

but i belive there will be a lot more to go as still in the process of getting ceilometer and swift to work.

thanks for all the support guys.