This is how I addressed the need to try and select unique ports for the VNC and
Spice environments. This is from a Bash script used to start each VM.
#=============================================================================#
# Spice and VNC Settings #
# #
# For each setting use the last octet of the primary MAC/IP Address in #
# decimal notation plus the port settings as the default setting. Thus for a #
# MAC/IP Address of 52:54:00:10:01:05/172.16.1.5 the settings would be: #
# #
# Spice Port (SPICEP) : 40000 + (octet5*256) + octet6 #
# VNC Port : 5900 + octet6 #
# #
# The octets converted to decimal notation. #
# #
#=============================================================================#
if [ "${MACADR[ 0]}" != "" ] ; then
SAV="${IFS}"
IFS="${IFS}:"
get_mac_as_decimal 1 ${MACADR[ 0]}
OCTET1=$?
get_mac_as_decimal 2 ${MACADR[ 0]}
OCTET2=$?
get_mac_as_decimal 3 ${MACADR[ 0]}
OCTET3=$?
get_mac_as_decimal 4 ${MACADR[ 0]}
OCTET4=$?
get_mac_as_decimal 5 ${MACADR[ 0]}
OCTET5=$?
get_mac_as_decimal 6 ${MACADR[ 0]}
OCTET6=$?
IFS="${SAV}"
OCTET5=$((${OCTET5}*256))
SPICEP=$((40000+${OCTET5}+${OCTET6}))
VNCHOST=":${OCTET6}" # Format is [host][:display]
MONPIPE="/tmp/.qemu_control_${SPICEP}" # Monitor Pipe
SPICEINFO="-spice port=${SPICEP},password=isrdesk"
VNCINFO="-vnc ${VNCHOST}"
QMPINFO="-qmp unix:${MONPIPE},server,nowait"
else
echo "MAC Address 0 is not defined. Spice Port, VNC Host and Monitor Pipe"
echo "can not be set. Empty values are being set. "
SPICEP=""
VNCHOST=""
MONPIPE=""
SPICEINFO=""
VNCINFO=""
QMPINFO=""
fi
Don
Mahmood Naderan wrote on 01/22/2017 08:23 AM:
>>you can run ps -eaf |grep vnc to see whcih all ports being reserved
>
> Isn't there any easier way? Users are not expert, so do not expect to use ps
> command and see which vnc port is free...
>
> If I don't use vnc, the qemu will bring up the screen. So, the question is
> what is the benefit of using vnc? Bu using vnc, I have to open another
> terminal and connect to the guest
>
> Regards,
> Mahmood
>
