June 2019 - Qlustar General - Qlustar Mailing Lists

[Qlustar-General] how to use roles to limit rights for some admins
by Rolandas 01 Jul '19

01 Jul '19

Hi, I want to limit rights for admins in qluman. I tried to create operator role and define minimal rights. I created user in qluman with such role and after connecting with him, I found it could do all admin tasks, even those denied by role rules. What I'm doing wrong ? Regards Rolandas

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[Qlustar-General] cannot run updated qluman gui
by Rolandas 27 Jun '19

27 Jun '19

Hi, ERROR : Unknown image format/type: qluman-10.1.1.23-singularity.sqsh ABORT : Retval = 255 singularity-container package is from ubuntu 19.04 repository: 2.6.1-2 Previous version qluman-10.1.1.19-singularity.sqsh works. MD5/SHA256 were verified and are the same as in qlustar dowanload page. Regards, Rolandas

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[Qlustar-General] Support for Intel MIC Xeon Phi
by Roberto Rey Expósito 27 Jun '19

27 Jun '19

Hi, I wonder if it is possible to have Xeon Phi hardware on a Qlustar-based cluster. I cannot see any module related with Xeon Phi during head node installation as it is the case for GPU or InfiniBand hardware, so the resulting CentOS image for compute nodes does not recognize the cards. Thanks, -- Roberto R. Expósito Grupo de Arquitectura de Computadores (GAC) Depto. Ingeniería de Computadores Universidade da Coruña (UDC)

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[Qlustar-General] Qlustar server in HA mode
by darkhalf78＠gmail.com 25 Jun '19

25 Jun '19

Hello, sorry if the question has been already discussed in previous threads, but i was wondering if there is a guide on how to configure two physical servers in HA mode as stated in the Administration Manual "In case of a HA head-node setup, the second head-node becomes a NIS slave server. " I configured the second server as NIS slave, but i'm more interested into a redundant configuration with drbd for the whole server. I'm trying to configure drbd to mirror all the partitions/LV on the second server using LCMC but with no success. Any guide or hint is very welcome :) Thanks a lot !

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[Qlustar-General] Qlustar 11 is out
by Roland Fehrenbacher 14 Jun '19

14 Jun '19

Check out the release notes at https://docs.qlustar.com/en-US/Qlustar_Cluster_OS/11.0/html-single/Release_… Enjoy, Roland

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[Qlustar-General] cannot start MPI jobs
by Rolandas 13 Jun '19

13 Jun '19

Hi, In fresh qlustar installation without infiniband we cannot start MPI jobs. Error message is long, but essential part is: [beo-01:19012] pmix_mca_base_component_repository_open: "mca_bfrops_v21" does not appear to be a valid bfrops MCA dynamic component (ignored): /usr/lib/openmpi/3.1.2/gcc/lib/openmpi/mca_pmix_ext2x.so: undefined symbol: mca_bfrops_v21_component. ret -1 Qlustar image for nodes have modules: core, slurm, ofed, lustre-client. UnionFS Chroot (xenial/10.1) is freshly installed without additional packages installed (dist-upgrade was executed). Regards, Rolandas

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[Qlustar-General] Slurm srun & MPI
by Ansgar Esztermann-Kirchner 12 Jun '19

12 Jun '19

Hello List, according to https://slurm.schedmd.com/mpi_guide.html#intel_srun, srun should be able to lauch MPI jobs on its own. However, my test jobs fail with errors like these: Fatal error in PMPI_Init_thread: Other MPI error, error stack: MPIR_Init_thread(805).....: fail failed MPID_Init(1832)...........: channel initialization failed ... Prior to the above errors, I see: mdrun_mpi_AVX_256: /usr/lib/x86_64-linux-gnu/slurm/auth_munge.so: Incompatible Slurm plugin version (17.11.9) mdrun_mpi_AVX_256: /usr/lib/x86_64-linux-gnu/slurm/auth_munge.so: Incompatible Slurm plugin version (17.11.9) mdrun_mpi_AVX_256: error: Couldn't load specified plugin name for auth/munge: Incompatible plugin version mdrun_mpi_AVX_256: error: cannot create auth context for auth/munge Where mdrun_mpi_AVX_256 is my executable. I've regenerated qlustar images and rebooted the nodes, but to no avail. I've also checked that md5sums for auth_munge.so and slurmstepd match the ones given in /usr/lib/qlustar/modules/xenial-amd64/10.1.1/slurm.contents, and now I'm out of ideas. I gues it would be nice to know what slurm thinks the correct version is, but unfortunately, only the offending version is printed... Any ideas what I should try next? Thanks, A. -- Ansgar Esztermann Sysadmin Dep. Theoretical and Computational Biophysics http://www.mpibpc.mpg.de/grubmueller/esztermann

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[Qlustar-General] Qlustar BoF at ISC 2019
by Roland Fehrenbacher 12 Jun '19

12 Jun '19

Hi, we are organizing a Birds of a feather session [1] at this years ISC (Wednesday, June 19th 2:45pm - 3:45pm, Room Kontrast). So if you're in Frankfurt next week, take the chance to join us. Best, Roland [1] https://2019.isc-program.com/?post_type=page&p=11&id=bof125&sess=sess237

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[Qlustar-General] https://www.qlustar.com site problems with certificate chain
by Rolandas 04 Jun '19

04 Jun '19

Hi, On new installation of Firefox we cannot connect to https://www.qlustar.com. The cause is missing intermediate certificate in server certificate chain response. By using openssl s_client -connect www.qlustar.com:443 we can see very strange chain: Certificate chain 0 s:CN = www.qlustar.com i:C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3 1 s:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Domain Validation Secure Server CA i:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Certification Authority 2 s:C = GB, ST = Greater Manchester, L = Salford, O = COMODO CA Limited, CN = COMODO RSA Certification Authority i:C = SE, O = AddTrust AB, OU = AddTrust External TTP Network, CN = AddTrust External CA Root Let's Encrypt have different intermediate certificate. Regards, Rolandas P.S. It also caused problems with wget/curl to download files from your site.

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Qlustar General June 2019