Thanks for the very fast answer Roland.
I did learn tmux on my linux workstation, beside the fact that its really cool and plan to use it the future, I am still struggling to have the demo and fe working in tmux
When starting the demo-system (*demo-system -a start)* -> console-demo-vms, I know as a fact now that I am in tmux but I am still on the c1-head. any Ctrlr-t n (or p) said "no next windows" , not only I can't switch to demo but also fe which if I understand correctly must have started automatically.
Once I exit from tmux with Ctrl-t d,
tmux ls gives: tmux ls error connecting to /tmp/tmux-0/default (No such file or directory)
I don't see demo or fe.
When trying to start console-fe-vm console-fe-vm No tmux session 'login-vm' with server socket 'ql-vms'
What's happening here ? note that during the install I rename the host c1-head jcluster and the fe jclustert (jcluster and jclustert are found in the DNS). Would it change anything ?
*I I do * 0 root@jcluster ~ # dsh -a uptime beo-201: ssh: connect to host beo-201 port 22: No route to host beo-202: ssh: connect to host beo-202 port 22: No route to host beo-203: ssh: connect to host beo-203 port 22: No route to host beo-204: ssh: connect to host beo-204 port 22: No route to host login-c: ssh: connect to host login-c port 22: No route to host
So yes , no demo or fe connection. Why do you thing is happening.
Thanks for your help
On 11/11/23 03:59, Roland Fehrenbacher wrote:
Hi Christophe,
On 11/11/23 07:28, Christophe Guilbert wrote:
Hi , I am completely new with qlustar. I would need some help to start having the cluster running as I don't really understand the doc. I did install qlustar (4 times) with no problem , Since I did not find out how to run the virtual FE node (and the demo mode VM by the way ). The last install was without create a virtual FE node. Following the section "1.5.5. Spack Package Manager" , it assume that I installed the FE node which I did not . There' s no alternative. I tried in vain to switch from root to user softadm in the main terminal , the user softadm is not even in the /etc/passwd. Under root I try my luck with the spack command leading to : spack compiler find -bash: spack: command not found
How to do the spack section without creating the virtual FE node ?
you must do the spack setup on a netboot node. It's easiest to do on the virtual FE node.
Also I don't mind reinstalling qlustar with the FE VM node but I would appreciate how to run it.
It's automatically started at boot as a systemd service as explained in the first steps doc.
Now here is my second question , how to run the demo VM ?
Here is my frustration sequences of event in case someone want to rewrite that part of the doc ;-)
demo-system -a start Starting VMs in a tmux session ... Created tmux session demo-system. => Attach with 'console-demo-vms'
So far so good so I ran console-demo-vms
Something happened and got a nice command line in the bottom of the terminal, but it looks like I am still on the front end , not in the demo VM , not only the prompt shows the front end hostname but htop command shows the whole ram of 32GB and CPU #, according to |/etc/qlustar/vm-configs/demo.conf|
|it should be : |
CN_MEM=1285 HA_MEM=1024
I am really confuse now, console-demo-vms did not show the demo VM ,
Any reason , what am I doing wrong here ?
console-demo-vms starts a tmux sessionwith each demo node's console in one window. As explained in the first steps doc, you can change to different windows in the tmux sessionusing the <Ctrl-t n> key stroke. That way you can switch to the demo node's consoles.
Now from the head node under root :
0 root@jcluster ~ # dsh -a uptime beo-201: ssh: connect to host beo-201 port 22: No route to host beo-202: ssh: connect to host beo-202 port 22: No route to host beo-203: ssh: connect to host beo-203 port 22: No route to host beo-204: ssh: connect to host beo-204 port 22: No route to host
beo-201 are supposed to be the demo VMs,
The demo nodes have not booted for some reason, you should check their console (see above) for errors.
I have many more questions but that's it for now but planing forward, I did managed to run QluMan_gui, I played over night (until 5am) trying to add a working user and add a node . etc ..
The doc for me for unusable, there's no tutorial online I could find (other than the first install which is very simple). I would be really appreciate if someone could describe the full procedure to add a node from catching the MAC address of the new node, building an image for that guy and include it in slurm. something to start with .
It's explained in the QluMan docs.
Good luck,
Roland
Thanks for your help .
I really would love to have qclusar working ASAP for my very urgent project research involving GPU
Thanks
Chris
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