- Qlustar General - Qlustar Mailing Lists

[Qlustar-General] OpenMPI failure
by Kim Peterson 07 Aug '20

07 Aug '20

Qlustar Kim here again; new Qlustar user, local university CS student. I have installed Qlustar on a Master node with 2 compute nodes attached, and I have installed the QluMan GUI Singularity container on a stand alone Front End computer. All seems to be working well. I get to Section 1.8 near the end of the First Steps Guide, and follow the instruction to log into the User account I have set up on the Head Node (Section 1.7), and run a test to verify the installation of MPI. I get no response to the instruction mpicc.openmpi-gcc -o hello-world-c hello-world.c I note that I get a response of: "no such instruction found" when I try: mpirun --version Anyone have an idea of what I might be doing wrong or what I might do to get OpenMPI working? Kim

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[Qlustar-General] install qluman-qt fails
by Kim Peterson 22 Jul '20

22 Jul '20

I have set up a small cluster with a Master and 2 compute nodes. The Master has public and private Ethernet interfaces. The public interface is the connection to the internet. The private interface is the connection with the compute nodes. I installed Qlustar 11.0.1-0 on the Master, which completed with no issue. I had to restart the network services with systemctl restart systemd-resolved.service after the second re-boot during installation, and then proceeded with the First Steps checklist. I did not configure a Demo Cluster (Step 1.3) and I did not install additional software (Step 1.5). First Steps went fine up until step 1.6 "Running the Cluster Manager QluMan". Using the Head Node, I obtained a one-time token and saved it to /media/token (Step 1.6.1). When I attempted to install QluMan (Step 1.6.2), the review of packages that appeared on the monitor was normal looking, but the installation of each package failed. Failure indication was the same for each package to be installed; There was a notice that started with "Failed to fetch http://repo.qlustar.com/repo/ubuntu/pool/ ..." and ended with "... temporary failure resolving "repo.qlustar.com". I did a little communication check of the public network: ping www.google.com produced "Temporary failure in name resolution" ping 8.8.8.8 produced a steady stream of reports of "64 bytes from 8.8.8.8: icmp_seq=<n> tt1=116 time = 78.2 ms", with <n> incrementing each time. I also note that when I power up the 2 compute nodes after the successful Qlustar installation on the Master, there is no booting going on, which I presume may be related to whatever has made the Master unable to resolve network ip addresses and names. I am a CS student working a project that required a small cluster computer, so I have no particular skill with the technology here. I spent the better part of the day trying to figure out what I'm doing wrong, but I have failed. The issue is reproducible. I have done multiple installs from scratch and always get the same result. I note that the Qlustar OS installation and the early First Steps require access to the Qlustar.com repo, and that the "Final Reboot" at Step 1.2 appears to be when the Master node loses its ability to resolve network addresses and names and becomes unable to access the Qlustar.com repo. Do any of the kind listeners recognize my error or perhaps could recommend some sequence of steps I might take to isolate the problem? Kim

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[Qlustar-General] Security/Bug fix releases 11.0.1.1-b519f1302 / 10.1.1.14-b521f1301
by Roland Fehrenbacher 16 Jul '20

16 Jul '20

The Qlustar releases 11.0.1.1-b519f1302 and 10.1.1.14-b521f1301 are ready including a number of security and bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/news/qsa-0715201-linux-kernel-vulnerabilities https://qlustar.com/news/qsa-0715202-security-update-bundle The following non-security related enhancements/bug fixes are included: Qlustar 11.0.1.1-b519f1302 updates to/adds + the latest Lustre LTS release 2.12.5 + the latest Nvidia graphics drivers 440.100 supporting recently introduced Nvidia hardware + Several Nvidia GPU metrics (temperature, load, fan) were added to Ganglia + Fixes - QluMan * Improve slurm job information updates on busy head-nodes * Allow multiple networks for external hosts in Filesystem Mounts * Fix exceptions when editing properties - GPU detection (possibly missing /dev/nvidia-uvm on hardware with many GPUs) - NIS was failing in certain situations due to wrong /etc/hosts

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[Qlustar-General] PXE problems since update
by stephanie.kerckhof＠ec.europa.eu 09 Jun '20

09 Jun '20

Hi, We recently tried to update qlustar to the 11.0.1 version adding UEFI support and CentOS 7.8. Since then, we got several problems with dnsmasq. First, the directory /var/lib/tftpboot/ was missing so we created it manually and added symbolic links to the files specified in the administration manual section ⁠4.1.2. It solved part of the problems we had, but now, while running systemctl status dnsmasq, we get the following error: dnsmasq-tftp[1758]: file /var/lib/tftpboot/grubnet.i386-pc not found Could you tell us where we could find this file? Thanks in advance for your help.

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[Qlustar-General] login-c and beo nodes do NOT start
by mauro.delossantos＠udc.es 04 Jun '20

04 Jun '20

I´m deploying a head-node in a Virtualbox VM with a FE VM and 2 demo nodes (beo-01/2). After follow the doc guide's instructions, i have the head node up with perfect state but login-c and beo nodes couldn't get started. Anybody knows the reason and how to fix that? Thanks.

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[Qlustar-General] 11.0.1 adds UEFI support and CentOS 7.8
by Roland Fehrenbacher 03 Jun '20

03 Jun '20

The Qlustar team is happy to announce the immediate availability of Qlustar 11.0.1 for download [1]. This minor release has two new features: a) Full UEFI support for the Qlustar installer and PXE booting of nodes. b) The move to CentOS 7.8 as the new supported minor CentOS 7 version. The Qlustar installer now transparently supports installation on legacy PC BIOS hardware as well as machines running under UEFI. If you have the choice, we recommend using the UEFI mode on your hardware. Our PXE booting mechanism has been doubly revamped: Firstly, we use GRUB as the boot loader now per default and secondly, we fully support UEFI based hardware transparently. So it will not matter whether your hardware runs under UEFI or PC BIOS, it should just boot fine, once registered correctly under QluMan. Reverting to booting with PXELINUX on PC BIOS machines is supported if needed/desired. Please follow the special update instructions [2] of the latest security announcements when updating and if you use QluMan singularity images, make sure you download [3] the latest version. This is the last feature addition to Qlustar 11. We now work at full steam on the Qlustar 12 release based on Ubuntu 20.04 and scheduled for some time later this year. [1] https://www.qlustar.com/download [2] https://www.qlustar.com/news/qsa-0527201-linux-kernel-vulnerabilities [3] https://www.qlustar.com/download

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[Qlustar-General] Security/Bug fix releases 11.0.1.0-b519f1296 / 10.1.1.13-b521f1295
by Roland Fehrenbacher 30 May '20

30 May '20

The Qlustar releases 11.0.1.0-b519f1296 and 10.1.1.13-b521f1295 are ready including a number of security and bug fixes. Please check the following web pages for details about security fixes and special update instructions: https://qlustar.com/news/qsa-0527201-linux-kernel-vulnerabilities https://qlustar.com/news/qsa-0527202-security-update-bundle

1 0

[Qlustar-General] CentOS 8 support has arrived
by Roland Fehrenbacher 20 Apr '20

20 Apr '20

CentOS 8 support is now available as a third Qlustar edge-platform and was published together with the latest security updates. It comes with the same functionality as our CentOS 7 port which includes out of the box OpenHPC 1.3.9 integration, Slurm 18.10.x, up-to-date Nvidia 340.x drivers, Lustre client and BeeGFS client. Making your compute nodes switch to CentOS 8 on an existing Qlustar cluster installation is extremely simple: First create a CentOS 8 chroot [1] optionally adding OpenHPC base support, then generate a CentOS 8 OS image [2] selecting the modules you require and finally a boot config [3] using the just generated image. After assigning [4] this boot config to the nodes you want to run it on, you just need to reboot them and voilà your CentOS 8 nodes are ready to be used. Note that OpenHPC 1.3.9 was originally built for CentOS 7.7. We had to make a few adjustments to make the OpenHPC parts relevant to Qlustar (compilers, MPIs, library packages and applications) work for CentOS 8. The OpenHPC test-suite was run successfully against these components. Once OpenHPC 2.0 will be out, we'll publish instructions to update to it. This will be straightforward. Additional improvements with this release: Updates to the latest Lustre 2.12.4 LTS release and the newest Nvidia graphics drivers 340.64 adding support for the latest Nvidia GPUs. These two updates apply to all Qlustar 11.0 platforms (Ubuntu 18.04 and CentOS 7/8). [1] https://docs.qlustar.com/en-US/Qlustar_Cluster_OS/11.0/html-single/QluMan_G… [2] https://docs.qlustar.com/en-US/Qlustar_Cluster_OS/11.0/html-single/QluMan_G… [3] https://docs.qlustar.com/en-US/Qlustar_Cluster_OS/11.0/html-single/QluMan_G… [4] https://docs.qlustar.com/en-US/Qlustar_Cluster_OS/11.0/html-single/QluMan_G…

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[Qlustar-General] Trying to sort network interfaces: can I shell out in the installer?
by jarett＠bioteam.net 15 Apr '20

15 Apr '20

There are six relevant network interfaces on my head node, some of which are relevant and linked and some of which are not, and I can't tell which is which from the network interface names and am not on site to plug and unplug things. Is there some way to shell out, bring all the interfaces up and puzzle it out that way? TIA.

2 1

[Qlustar-General] Security/Bug fix releases 11.0.0.8-b518f1287 / 10.1.1.12-b521f1292
by Roland Fehrenbacher 14 Apr '20

14 Apr '20

The Qlustar releases 11.0.0.8-b518f1287 and 10.1.1.12-b521f1292 are ready including a number of security and bug fixes. Please check the following web pages for details about security fixes: https://qlustar.com/news/qsa-0406201-linux-kernel-vulnerabilities https://qlustar.com/news/qsa-0406202-security-update-bundle The following non-security related enhancements/bug fixes are included: * Qlustar 11.0.0.8-b518f1287 updates to + the latest Lustre LTS release 2.12.4 + the latest Nvidia graphics drivers 440.64 supporting recently introduced Nvidia hardware

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