- Qlustar General - Qlustar Mailing Lists

[Qlustar-General] API
by Ansgar Esztermann-Kirchner 10 Dec '18

10 Dec '18

Hello List, there's a few areas of configuration where we'd welcome more automation (e.g. creating a lot of nodes). Therefore, I'd like to develop some tools that interface with the central daemon. Is there any API documentation available? Thanks, A. -- Ansgar Esztermann Sysadmin http://www.mpibpc.mpg.de/grubmueller/esztermann

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[Qlustar-General] Hardware config incomplete
by Ansgar Esztermann-Kirchner 03 Dec '18

03 Dec '18

Hello List, I've just added a few nodes to the cluster, and they're marked with the empty wrench icon "Hardware config incomplete". How do I find out what's missing? Thanks, A. -- Ansgar Esztermann Sysadmin http://www.mpibpc.mpg.de/grubmueller/esztermann

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[Qlustar-General] Kernel panic - not syncing: Attempted to kill init! exit code=0x00000100
by Hernán Morales Durand 27 Nov '18

27 Nov '18

Hello, Tyring a new installation here from USB using the current installer https://www.qlustar.com/sites/default/files/downloads/qlustar-installer-10.… My server started to boot correctly, however a kernel panic happened. You can view kernel dump details here: https://imgur.com/a/7jSCHuJ I tried to make a memory area for the kdump kernel with crashkernel and debug parameters, however I don't know if it is possible to export the kernel dump. Any hints? Cheers, Hernán

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[Qlustar-General] can not retrive Qlustar PGP archive key
by Lloyd Jennings 26 Nov '18

26 Nov '18

Qlustar 10.1 can not find key. root@workstation:~# dpkg -l software-properties-common > /dev/null 2>&1 || apt install software-properties-common root@workstation:~# gpg --no-default-keyring --primary-keyring /etc/apt/trusted.gpg --recv-keys E6BA110F3C0BC307 gpg: no keyserver known (use option --keyserver) gpg: keyserver receive failed: bad URI root@workstation:~#

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[Qlustar-General] qlustar 10.1: chroot-xenial doesnt sync /var/lib
by kwinten.nelissen＠gmail.com 18 Oct '18

18 Oct '18

Hi, I am testing singularity and I encountered the problem that /var/lib is not synchronized with the chroot environment at the node. I am looking now into the unionfs -fuse of the init.qlustar script but I can not find any problem here. Is there a configuration file somewhere for the chroot environment? Best regards, Kwinten

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[Qlustar-General] Slurm failed to detect properly CPU-cores and RAM when adding new nodes.
by kwinten.nelissen＠gmail.com 15 Oct '18

15 Oct '18

Hi, Something went from when adding new nodes. The configuration file was somehow not fully written. So I wrote them again and restarted the slurm on all nodes. All nodes were affected but the problem seems to be resolved now. The Error read as follows: K> 2018-10-10T09:14:43.306] error: _slurm_rpc_node_registration K> node=beo-02: Invalid argument [2018-10-10T09:14:43.306] error: K> Node beo-01 appears to have a different slurm.conf than the K> slurmctld. This could cause issues with communication and K> functionality. Please review both files and make sure they are K> the same. If this is expected ignore, and set K> DebugFlags=NO_CONF_HASH in your slurm.conf. K> [2018-10-10T09:14:43.306] error: Node beo-01 has low K> socket*core*thread count (16 < 32) [2018-10-10T09:14:43.306] K> error: Node beo-01 has low cpu count (16 < 32) K> [2018-10-10T09:14:43.306] error: _slurm_rpc_node_registration K> node=beo-01: Invalid argument Moreover it seems when a node is added, at the first boot time slurm detect the RAM, etc wrongly. This can be resolved by simply restarting slurm at the new added node. Perhaps the update would indeed resolve this issue. Best regards, Kwinten

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[Qlustar-General] IMPI
by ignas.bunikis＠scilifelab.uu.se 05 Sep '18

05 Sep '18

Hej, How to correctly set up IMPI? I guess this one is a bit more tricky to trouble shoot, but here's what I have: * IMPI network was set up during installation; * cabling done; * anything to check in BIOS? * following QluMan guide "3.7. IPMI settings" I set "Initialize IPMI: true" in "Generic Property Set" assigned to nodes; * nodes "Hardware Property Set" has "IPMI Adapter: true"; Rebooted everything, started "console-login", but see only headnode. What did I miss? Cheers, Iggy

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[Qlustar-General] SGE
by ignas.bunikis＠scilifelab.uu.se 05 Sep '18

05 Sep '18

Hej, I would like to set up SGE on freshly installed cluster. Could you please briefly describe necessary steps. Cheers, Iggy

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[Qlustar-General] Open file limit
by ignas.bunikis＠scilifelab.uu.se 05 Sep '18

05 Sep '18

Hej, I need to increase Open file limit on the nodes. Should I use customized "limits.conf" and follow admin guide "4.2.5. Adding directories, files, links"? cat /etc/qlustar/common/image-files/my/limits.conf * soft nproc 10024 * hard nproc 10024 * soft nofile 50024 * hard nofile 50024 * soft memlock 255707144 * hard memlock 255707144 cat /etc/qlustar/common/image-files/destinations my/limits.conf /etc/security root:root 644 Is that a good way? Cheers, Iggy

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[Qlustar-General] limit network access
by ignas.bunikis＠scilifelab.uu.se 05 Sep '18

05 Sep '18

Hej, I would like to limit access to the cluster via hosts.allow and hosts.deny. What is the best way to do it? I could create a script in /etc/qlustar/common/rc.boot/ that looks like this: #!/bin/bash echo 'sshd: ALL' >> /etc/hosts.deny echo 'sshd: localhost' >> /etc/hosts.allow echo 'sshd: xxx.xxx.xxx.xxx' >> /etc/hosts.allow Is that ok? Cheers, Iggy

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Qlustar General