Problems with VNC-Console over API

[Stefan_Herrmann]

Hello,

we have some problems with the vnc-console (especially via api) and pve 3.0/3.1.
I managed to open VNC-Sessions via. webinterface by increasing $timeout in /usr/share/perl5/PVE/API2/Qemu.pm to 20 (no other changes made so far).
VNC via. webinterface now works but needs one reload before opening the session.
Error from log:

[COLOR=#000000][FONT=tahoma]no connection : Connection timed out[/FONT][/COLOR][COLOR=#000000][FONT=tahoma]
TASK ERROR: command '/bin/nc -l -p 5900 -w 20 -c '/usr/bin/ssh -T -o BatchMode=yes <ip4> /usr/sbin/qm vncproxy 695 2>/dev/null'' failed: exit code 1
[/FONT][/COLOR]

pveversion:

proxmox-ve-2.6.32: 3.1-109 (running kernel: 2.6.32-22-pve)
pve-manager: 3.1-3 (running version: 3.1-3/dc0e9b0e)
pve-kernel-2.6.32-22-pve: 2.6.32-107
pve-kernel-2.6.32-23-pve: 2.6.32-109
lvm2: 2.02.98-pve4
clvm: 2.02.98-pve4
corosync-pve: 1.4.5-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.0-1
pve-cluster: 3.0-7
qemu-server: 3.1-1
pve-firmware: 1.0-23
libpve-common-perl: 3.0-6
libpve-access-control: 3.0-6
libpve-storage-perl: 3.0-10
pve-libspice-server1: 0.12.4-1
vncterm: 1.1-4
vzctl: 4.0-1pve3
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 1.4-17
ksm-control-daemon: 1.1-1
glusterfs-client: 3.4.0-2

VNC-Console via API however doesn't work at all (it times out with same error in log and offers to login again).
Other API-functions (like creating backups, changing vm settings, power-functions, ...) work perfectly.
We tried with different Java-versions and clients.
How can we get the vnc-console working on first-try (I think that would also the fix for the problem with api-vnc)?

 

[dietmar]

How can we get the vnc-console working on first-try (I think that would also the fix for the problem with api-vnc)?

That works here without problems.

 

[Stefan_Herrmann]

EDIT: deleted -> duplicate post

 

[Stefan_Herrmann]

API-Console also works with every other proxmox-server we have (still running pve-2.3).
Despite that particular problem we never experienced problems with pve - so great job.


We have only two servers running pve-3.0/3.1 and both show the described behavior.
The two servers are installed with basic debian-wheezy and then proxmox - so not updated ones from 2.3 to 3.0.
They are running as two-node-cluster (no h/a and no shared storage).
I can see the netcat-process via ps -aux and it's possible to connect to the specified port via telnet once the process is there - so it's not a networking-problem.
There must be something inside the system preventing the first connect (as I described - VNC-Console only works after clicking the reload-button).


Is there a way to reconfigure the components for console without the need to shutdown running vms or rebooting the server?
What else could I try to solve that issue?

 

[mir]

What version of java do you use on your client?

Check here: http://java.com/en/download/installed.jsp

 

[Stefan_Herrmann]

we tried with different clients running different java versions.
Right now I'm using Version 7 Update 40.

 

[dietmar]

Are there any hints in /var/log/syslog?

 

[Stefan_Herrmann]

The only thing not usual is a perl-warning.
Here's the syslog-Output for both nodes on all 3 methods of opening the console:

opening console via. Webinterface (fails):

Sep 24 11:29:07 prox1 pvedaemon[1030154]: <root@pam> starting task UPID:prox1:00030C99:13CF4186:52415B63:vncproxy:695:root@pam:
Sep 24 11:29:07 prox1 pvedaemon[199833]: starting vnc proxy UPID:prox1:00030C99:13CF4186:52415B63:vncproxy:695:root@pam:
Sep 24 11:29:07 prox1 pvedaemon[199833]: WARNING: Use of uninitialized value in pattern match (m//) at /usr/share/perl5/PVE/API2/Qemu.pm line 1305.
Sep 24 11:29:27 prox1 pvedaemon[199833]: command '/bin/nc -l -p 5900 -w 20 -c '/usr/bin/ssh -T -o BatchMode=yes [IP PROX2] /usr/sbin/qm vncproxy 695 2>/dev/null'' failed: exit code 1
Sep 24 11:29:27 prox1 pvedaemon[1030154]: <root@pam> end task UPID:prox1:00030C99:13CF4186:52415B63:vncproxy:695:root@pam: command '/bin/nc -l -p 5900 -w 20 -c '/usr/bin/ssh -T -o BatchMode=yes [IP PROX2] /usr/sbin/qm vncproxy 695 2>/dev/null'' failed: exit code 1

Sep 24 11:29:07 prox2 pmxcfs[26505]: [status] notice: received log
Sep 24 11:29:27 prox2 pmxcfs[26505]: [status] notice: received log

opening Console via API-CALL (fails):

Sep 24 11:30:49 prox1 pmxcfs[7964]: [status] notice: received log
Sep 24 11:30:49 prox1 pmxcfs[7964]: [status] notice: received log
Sep 24 11:30:52 prox1 pvedaemon[1030152]: <root@pam> successful auth for user 'root@pam'
Sep 24 11:31:09 prox1 pmxcfs[7964]: [status] notice: received log

Sep 24 11:30:49 prox2 pvedaemon[106348]: <root@pam> successful auth for user 'root@pam'
Sep 24 11:30:49 prox2 pvedaemon[100056]: <root@pam> starting task UPID:prox2:0004990A:13CF78B4:52415BC9:vncproxy:695:root@pam:
Sep 24 11:30:49 prox2 pvedaemon[301322]: starting vnc proxy UPID:prox2:0004990A:13CF78B4:52415BC9:vncproxy:695:root@pam:
Sep 24 11:30:52 prox2 pmxcfs[26505]: [status] notice: received log
Sep 24 11:31:09 prox2 pvedaemon[301322]: command '/bin/nc -l -p 5900 -w 20 -c '/usr/sbin/qm vncproxy 695 2>/dev/null'' failed: exit code 1
Sep 24 11:31:09 prox2 pvedaemon[100056]: <root@pam> end task UPID:prox2:0004990A:13CF78B4:52415BC9:vncproxy:695:root@pam: command '/bin/nc -l -p 5900 -w 20 -c '/usr/sbin/qm vncproxy 695 2>/dev/null'' failed: exit code 1

Opening Console via. Webinterface and instantly pushing reload-Button (works)

Sep 24 11:31:56 prox1 pvedaemon[200467]: starting vnc proxy UPID:prox1:00030F13:13CF83A1:52415C0C:vncproxy:695:root@pam:
Sep 24 11:31:56 prox1 pvedaemon[1030154]: <root@pam> starting task UPID:prox1:00030F13:13CF83A1:52415C0C:vncproxy:695:root@pam:
Sep 24 11:31:56 prox1 pvedaemon[200467]: WARNING: Use of uninitialized value in pattern match (m//) at /usr/share/perl5/PVE/API2/Qemu.pm line 1305.
Sep 24 11:32:00 prox1 pvedaemon[1030153]: <root@pam> starting task UPID:prox1:00030F15:13CF8560:52415C10:vncproxy:695:root@pam:
Sep 24 11:32:00 prox1 pvedaemon[200469]: starting vnc proxy UPID:prox1:00030F15:13CF8560:52415C10:vncproxy:695:root@pam:
Sep 24 11:32:00 prox1 pvedaemon[200469]: WARNING: Use of uninitialized value in pattern match (m//) at /usr/share/perl5/PVE/API2/Qemu.pm line 1305.
Sep 24 11:32:09 prox1 pmxcfs[7964]: [status] notice: received log

Sep 24 11:31:56 prox2 pmxcfs[26505]: [status] notice: received log
Sep 24 11:32:00 prox2 pmxcfs[26505]: [status] notice: received log
Sep 24 11:32:09 prox2 pvedaemon[105710]: <root@pam> successful auth for user 'root@pam'
Sep 24 11:32:09 prox2 pvedaemon[88818]: worker 100056 finished
Sep 24 11:32:09 prox2 pvedaemon[88818]: starting 1 worker(s)
Sep 24 11:32:09 prox2 pvedaemon[88818]: worker 301376 started
Sep 24 11:32:16 prox2 pmxcfs[26505]: [status] notice: received log