Re: [vizstack-users] Configuring VizStack - TurboVNC server failed to start - Problem

[Cristi M. <Cri...@ne...>]

First of all I would like to present my hardware configuration.

I have a cluster that consists:
- node0 (server - master node -SSM)
- node1, node2 (rendering nodes)

I have to mention that my master node is a Virtual Machine and does not
have a GPU. The rendering nodes have NVIDIA GTS 8800. All the nodes have
OS: Ubuntu Server 10.04

I would like to add that I had tested the VNC server (classical way) and is
working fine on each node (node0, node1, node2).

/opt/TurboVNC/bin/vncserver

I was asking for a password on each node. On every node I have the same
user and the home directory contains the same /.vnc folder with the same
passwd file. So, I have the same user & VNC password everywhere in the
cluster.

I don't know why is not working using Vizstack....

After I run the config:
/opt/vizstack/sbin/vs-configure-system -s slurm node[1-2]
and
start the SSM: /opt/vizstack/sbin/vs-ssm start

When I run:
viz-tvnc
The result is the same:
Starting Desktop with resolution 1280x1024
TurboVNC server failed to start.

I receive the same result even if I try with:
/opt/vizstack/sbin/vs-configure-system -s slurm node1
or
/opt/vizstack/sbin/vs-configure-system -s slurm node2

I received the same result if I tried the standalone config from node1 or
node2:
/opt/vizstack/sbin/vs-configure-standalone

I would appreciate if you can give me some more information about how I
should setup Vizstack or TurboVNC user pass...

Thank you in advance !

Cheers,
Cristi

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From: Kumar, Shree <shreekumar@hp...> - 2011-01-20 04:48

Hi Cristi,

Looks like a commonn cluster setup issue to me.

>From your earlier email, I can see that VizStack is managing GPUs on two
systems cgis[1-2]. When you run viz-tvnc, it tries to start a TurboVNC
server on one of those systems. If a TurboVNC server cannot be started on
those nodes, then the script will fail.

You have already setup a password on your local machine (the machine where
you ran the configure scrpt - cgis0, perhaps), so the server is starting
up just fine.

Interestingly, startup can fail on a per-user basis. If a user has not
assigned a vnc password, then the server will not start. If you try to
start the TurboVNC server on any of the nodes cgis[1-2], you will find
that it prompts you for a password. Can you confirm that this is the issue
?

If you find that this is indeed the issue, then you will have to ensure
that every user who wants to use TurboVNC will have to set a password on
every machine. If you have shared home directories, then they need to set
the password atleast once.

Regards
-- Shree