Unable to use the web remote console

[piero.proietti]

I run Proxmox VE from more than a year ad never had big problems, really a great work. Recentely after the update from 1.4 to 1.5 I had the following problem:

When I try to connect a virtual machine with the browser, it open the window of the console, but don't work and I receive the follow error in the apache error.log:

[Fri Mar 12 15:55:21 2010] [error] [4922]ERR: 24: Error in Perl code: unable to find free vnc port at /usr/share/perl5/PVE/ConfigServer.pm line 1008.\n

this is the content of ConfigServer.pm

...
my $next_vnc_port = sub { # private method

for (my $p = 5900; $p < 6000; $p++) {

my $sock = IO::Socket::INET->new (Listen => 5,
LocalAddr => 'localhost',
LocalPort => $p,
ReuseAddr => 1,
Proto => 0);

if ($sock) {
close ($sock);
return $p;
}
}
die "unable to find free vnc port";
};
...


This my actual version:

# pveversion --verbose

pve-manager: 1.5-8 (pve-manager/1.5/4674)
running kernel: 2.6.24-10-pve
proxmox-ve-2.6.24: 1.5-21
pve-kernel-2.6.24-10-pve: 2.6.24-21
pve-kernel-2.6.24-1-pve: 2.6.24-4
pve-kernel-2.6.24-5-pve: 2.6.24-6
pve-kernel-2.6.24-2-pve: 2.6.24-5
qemu-server: 1.1-11
pve-firmware: 1.0-3
libpve-storage-perl: 1.0-10
vncterm: 0.9-2
vzctl: 3.0.23-1pve8
vzdump: 1.2-5
vzprocps: 2.0.11-1dso2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.11.1-2

That I can do to solve the question, possibly without the need to reformat everything?

Thanx

 

[tom]

is this a standard ISO install, no manual changes?

 

[piero.proietti]

)Yes, it is a standard ISO install (version 1.4 as I remember) just upgrated to 1.5.

 

[dietmar]

So who uses ports 5900-6000? Or do you run some kind of firewall?

 

[piero.proietti]

I don't know, this is the result of

#pstree

init─┬─apache2───2*[apache2]
├─atd
├─cron
├─6*[getty]
├─inetd
├─kvm───3*[{kvm}]
├─kvm───2*[{kvm}]
├─master─┬─pickup
│ ├─qmgr
│ └─tlsmgr
├─ntpd
├─portmap
├─pvedaemon───2*[pvedaemon]
├─rpc.statd
├─rsyslogd───3*[{rsyslogd}]
├─sshd───sshd───bash───pstree
└─udevd

 

[dietmar]

Does "netstat -t" shows something usefull.

 

[piero.proietti]

netstat -t
This is the result of netstat -t

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 prometeo.geniodife.:ssh 10.26.106.50:34776 ESTABLISHED
tcp 0 0 prometeo.geniodife.:ssh 10.26.106.181:46811 ESTABLISHED
prometeo:~#

I tried this command too

iptables -I INPUT -m state --state NEW -p tcp --dport 5900:6000 -j ACCEPT

to enable the port for VNC (from the site http://www.convirture.com/wiki/index.php?title=Convirt2_Installation) but unfortunately nothing happen :-(

 

[dietmar]

just copy the code into your own litte perl script and try to debug - I can't see what's wrong.

 

[SamTzu]

Lets see a bit more info about the open ports. Run this command...

netstat -tapn

And also this...

locate vncterm

And also this...

cat /etc/hosts

 

[piero.proietti]

Thanx Sam, thanx a lot

I just run the commands and I just solved the problem...

The problem was... the lacks of /etc/hosts.

I dont know why or in that way this file was deleted, everything was going well, except vncterm!

Just put it back and everything is working perfectly.

Really thanx a lot Tom, Dietmar, Sam.

Piero Proietti

 

[SamTzu]

It was my pleasure Piero.
I try to visit this great forum when I have the time. I have found HowtoForge and this place to be the greatest fountains of IT knowledge in the NET.

 

[willy1009]

hi,

i'm sorry i up this topic but i get the same problem. When i try to use vnc console i get this error "[2734]ERR: 24: Error in Perl code: unable to find free vnc port at /usr/share/perl5/PVE/ConfigServer.pm line 1011"

here's the result of pveversion -v command :

pve-manager: 1.9-26 (pve-manager/1.9/6567)
running kernel: 2.6.32-6-pve
proxmox-ve-2.6.32: 1.9-51
pve-kernel-2.6.32-6-pve: 2.6.32-51
qemu-server: 1.1-32
pve-firmware: 1.0-14
libpve-storage-perl: 1.0-19
vncterm: 0.9-2
vzctl: 3.0.29-3pve1
vzdump: 1.2-16
vzprocps: 2.0.11-2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.15.0-2
ksm-control-daemon: 1.0-6

thanks for help

 

[willy1009]

with the command cat /etc/hosts

# This file is automatically maintained by lvm.

persistent_filter_cache {
valid_devices=[
"/dev/disk/by-id/ata-ST31000528AS_9VP7DXLB-part1",
"/dev/block/1:13",
"/dev/block/1:14",
"/dev/ram11",
"/dev/disk/by-uuid/aa215bf6-301b-44d9-857c-410e748a982b",
"/dev/block/253:2",
"/dev/disk/by-u

Is this normal ??

 

[dietmar]

Is this normal ??

No (looks like the content of /etc/lvm/lvm.conf).