Connect to VM console directly with VNC client

I used to be able to connect to a VM's console with the VNC client by logging onto the OVM server where the VM was running and discovering what port the VM's VNC server is listening on (xm list -l | grep location). Now it seems that doesn't work anymore. Is there still a way to do this with OVM 3.1.1?

It appears they have disabled this feature in 3.1
If you look at the vm.cfg file on an old 2.x server it is of the format
bootloader = '/usr/bin/pygrub'
disk = ['file:/var/ovs/mount/3D2FD7081A3D49FCBA309AF1316E028F/running_pool/212_ThisServer/System.img,xvda,w',
'file:/var/ovs/mount/3D2FD7081A3D49FCBA309AF1316E028F/running_pool/212_ThisServer/thisDisk_1.img,xvdb,w',
disk_other_config = []
maxmem = 2048
memory = 2048
name = '212_ThisServer'
on_crash = 'restart'
on_reboot = 'restart'
uuid = 'f1bb3127-751f-4224-b348-5f7f3bc0d30a'
vcpus = 2
vfb = ['type=vnc,vncunused=1,vnclisten=0.0.0.0,vncpasswd=thispassword']
vif = ['bridge=xenbr0,mac=00:46:3E:79:C2:9F,type=netfront']
vif_other_config = []
Then on a 3.1 vm.cfg
vif = ['mac=00:21:26:45:22:68,bridge=192.168.64.0']
OVM_simple_name = 'XP Base Install'
vnclisten = '127.0.0.1'
disk = ['file:/OVS/Repositories/0005dbc00003ba00125c62ddc69f963a/VirtualDisks/0005dbc000120000caecb0faa3a25145.img,xvda,w', 'file:/OVS/Repositories/0005dbc0000300003ba20155bc480b24/ISOs/0005dbc0001500003442da06ad201438.iso,xvdb:cdrom,r']
vncunused = '1'
uuid = '0005dbc0-0006-0000-d77c-20e2f718bdd0'
on_reboot = 'restart'
boot = 'dc'
name = '0005dbc000060000d47830e2f718bdd0'
cpu_weight = 27500
memory = 2048
cpu_cap = 0
maxvcpus = 1
OVM_high_availability = False
maxmem = 2048
vnc = '1'
OVM_description = ''
on_poweroff = 'destroy'
on_crash = 'restart'
guest_os_type = 'windows'
usbdevice = 'tablet'
builder = 'hvm'
vcpus = 1
keymap = 'en-us'
OVM_os_type = 'Other Microsoft Windows'
OVM_cpu_compat_group = ''
OVM_domain_type = 'xen_hvm'
I have tried replacing
vnclisten = '127.0.0.1'
with
vnclisten = '0.0.0.0'
and it opened up the port but I could not connect successfully with tightVNC. Tight VNC appears to make a connection but you cannot see anything.
You can see what ports by running a 'netstat -nat' on the VM server (command below I removed unimportant results)
[root@ovs-c9-28-2c VirtualMachines]# netstat -nat
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:5900 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5901 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5902 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6900 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6901 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6902 0.0.0.0:* LISTEN
As you can see above the port 5902 is listening while the others are set to localhost and used by the VM Manager for VNC connections.
I also tried adding in the vncpasswd line like below and was prompted for a password but the VNC session failed. Note it also broke the VNC access from the manager.
vnclisten = '0.0.0.0'
vncpasswd = 'letmein'
That said Oracle do not support manual modification of the vm.cfg file (unless pinning CPUs) so going in there is probably not a good idea.
I think the only solution is to install a VNC server on the VM directly.
Edit:
Further to this you will note that there are also ports 6900 - 6902 which are definitely related to the VNC connection. I tried connection to these ports with no success however.
It appears the manager is acting as a tunnel for the VNC as when I have a valid connection (from manager) to the server on port 5901 I see the following
[root@ovs-c9-22-2c VirtualMachines]# netstat -nat
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:9020 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:7901 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:7903 0.0.0.0:* LISTEN
tcp 0 0 192.168.64.125:7777 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:8002 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:8899 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:8003 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5900 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5901 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5902 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:753 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6900 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6901 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6902 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp        0      0 192.168.64.125:6901         192.168.64.120:44014        ESTABLISHED
tcp 0 0 192.168.64.125:37298 192.168.64.64:3260 ESTABLISHED
tcp 0 0 192.168.64.125:8899 192.168.64.125:41445 TIME_WAIT
tcp 0 0 192.168.64.125:8899 192.168.64.125:41454 TIME_WAIT
tcp 0 0 127.0.0.1:46117 127.0.0.1:5901 ESTABLISHED
tcp 0 0 192.168.64.125:8899 192.168.64.125:41448 TIME_WAIT
tcp 0 0 127.0.0.1:9020 127.0.0.1:56940 ESTABLISHED
tcp        0      0 127.0.0.1:5901              127.0.0.1:46117             ESTABLISHED
tcp 0 0 192.168.64.125:8899 192.168.64.125:41456 TIME_WAIT
tcp 0 0 127.0.0.1:56940 127.0.0.1:9020 ESTABLISHED
tcp 0 0 192.168.64.125:8899 192.168.64.125:41450 TIME_WAIT
Then a netstat on the manager shows the pipe is definitely connecting through 6901 (on server) and 15901 (on manager)
Notable IPs
Machine I am VNCing from 192.168.64.50
VM Manager 192.168.64.120
VM Server 192.168.64.125
I have bolded the connections that disappeared after disconnecting the VNC connection.
[root@manager ~]# netstat -nat | grep .50
tcp 0 0 192.168.64.120:22 192.168.64.50:58858 ESTABLISHED
tcp 0 52 192.168.64.120:22 192.168.64.50:50838 ESTABLISHED
tcp 0 0 ::ffff:127.0.0.1:63350 ::ffff:127.0.0.1:54321 ESTABLISHED
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.50:53327 ESTABLISHED
tcp 0 0 ::ffff:127.0.0.1:54321 ::ffff:127.0.0.1:63350 ESTABLISHED
tcp        0      0 ::ffff:192.168.64.120:15901 ::ffff:192.168.64.50:49503  ESTABLISHED
[root@manager ~]# netstat -nat | grep .125
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46983 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46976 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46986 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46977 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46982 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46978 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46974 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46981 TIME_WAIT
tcp        0      0 ::ffff:192.168.64.120:44014 ::ffff:192.168.64.125:6901  ESTABLISHED
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46985 TIME_WAIT
tcp 0 0 ::ffff:192.168.64.120:7001 ::ffff:192.168.64.125:46987 TIME_WAIT
Edited by: phoenixdigital on Sep 24, 2012 4:30 PM

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    Waiting for Reply,
    Satish.

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