Qlustar General September 2021

qlustar-general@qlustar.org

6 participants
6 discussions

[Qlustar-General] Node Replacement Issue - Infinite DNSMasq Lease in /var/lib/misc/dnsmasq.leases
by hereiam＠mit.edu 25 Nov '21

25 Nov '21

Hi everyone, I've run into what may be an uncommon issue when replacing nodes in Qluman. Say I have a node all configured, then I completely remove that machine and replace it with a new one (may or may not be different specs). I have noticed that Qluman allows one to make the new node in the configs, but it never boots Qlustar. I also found the fix - the file /var/lib/misc/dnsmasq.leases doesn't appear to get updated *only when deleting a node.* Adding new nodes works perfectly, as does changing MAC addresses. However, I've had to go in and manually delete the corresponding entries from the file on the headnode, after which Qluman works perfectly adding a New Host with the old IP address. Can anyone else reproduce this issue, and if so, would an addition to the scripts to the tune of deleting the line matching the hostname or MAC address in /var/lib/misc/dnsmasq.leases be required for the next round of updates? It makes sense that leases should have infinite lifetime in a cluster (nodes should sit tight for years), though in this rare situation it requires a bit of extra manual tweaking. Thanks, -Mike

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A few Qlustar 12.0 questions
by david.whipp＠helsinki.fi 20 Sep '21

20 Sep '21

Hi, First off, many thanks Roland for your earlier help with the Qlustar 12.0 installer. We've been up and running for a few months now and have almost everything working as desired. I'm writing because I have a few questions both about some issues we have not been able to resolve and some introduced in the latest security updates (QSA-0903211 and QSA-0903212). Latest issues first: 1. Since installing the latest security updates a few days ago I have noticed that Slurm has stopped working and the qluman-qt 'Components' option is grayed out (see https://imgur.com/a/W1Ejsvn). I'm not totally sure what the issue might be, but I noticed that the slurmdbd and slurmctld services are not running on the head node, and in fact are masked, which I understand will stop them from starting, right? You can see the output from 'service --status-all' and 'systemctl list-unit-files --state=masked' below. Any suggestions about how to re-enable Slurm? service --status-all: 0 root@geo-hpcc ~ # service --status-all [ - ] apache-htcacheclean [ + ] apache2 [ - ] console-setup.sh [ + ] cpufrequtils [ + ] cron [ + ] dbus [ + ] dnsmasq [ ? ] ganglia-monitor [ ? ] gmetad [ - ] grub-common [ - ] hwclock.sh [ - ] ipmievd [ - ] jobmonarch-jobmond [ - ] keyboard-setup.sh [ + ] kmod [ + ] loadcpufreq [ - ] lvm2 [ - ] lvm2-lvmpolld [ + ] munge [ + ] mysql [ + ] nagios4 [ - ] networking [ - ] nfs-common [ + ] nfs-kernel-server [ + ] ntp [ + ] postfix [ + ] procps [ + ] qluman-dhcpscanner [ + ] qluman-execd [ + ] qluman-router [ + ] qluman-server [ - ] qluman-slurmd [ + ] resolvconf [ - ] rng-tools [ + ] rpcbind [ - ] rsync [ + ] rsyslog [ + ] saslauthd [ + ] schroot [ - ] scsitools-pre.sh [ - ] scsitools.sh [ + ] slapd [ - ] slurmctld [ - ] slurmdbd [ + ] ssh [ + ] sssd [ + ] sysstat [ + ] udev [ - ] x11-common systemctl list-unit-files --state=masked: 0 root@geo-hpcc ~ # systemctl list-unit-files --state=masked UNIT FILE STATE VENDOR PRESET cryptdisks-early.service masked enabled cryptdisks.service masked enabled hwclock.service masked enabled jobmonarch-jobmond.service masked enabled lvm2.service masked enabled nfs-common.service masked enabled qluman-slurmd.service masked enabled rc.service masked enabled rcS.service masked enabled scsitools-pre.service masked enabled scsitools.service masked enabled slurmctld.service masked enabled slurmdbd.service masked enabled sudo.service masked enabled x11-common.service masked enabled 15 unit files listed. 2. In addition to the Slurm issue, I have also not been able to create new user accounts because the 'Components' option in qluman-qt is grayed out. I have previously migrated our old NIS user accounts to LDAP, but I am lackign experience with LDAP and unsure how to explore this issue. And finally, one older issue we have not resolved: 3. How do you change user passwords for LDAP users in Qlustar 12? I had been able to generate new passwords in qluman, but have not been able to figure out how what users should do to update their passwords. It seems perhaps there is a lifetime to the autogenerated passwords, so I have manually reset passwords when users needed them. Obviously, this is not something that is good in the long run. Do you have a suggestion? And sorry for the compilation of questions above. Hopefully the fixes are obvious to you and not too much trouble. Best, Dave

3 5

Qlustar 12 install fails on dell 3640
by maximilian.freudenberg＠uni-goettingen.de 10 Sep '21

10 Sep '21

Hi everybody! Yesterday I tried to install Qlustar 12.0.1-0 on a dell 3640 using a USB stick. Secure boot is off, legacy boot not available. I was able to start the install procedure, entered all details, read through the summary, hit enter, and BANG! big wall of running text. I took a photo and could decipher “stop_fail_installation task_error task_savelog die” repeated all over, which is almost poetic, but doesn't help much. Do you have any advice? How could I encircle the problem? It occurs no matter which distro or packages I select. Two things which are probably unrelated: 1) I had to reinsert the USB stick during the pre-install procedure, as there were problems during USB device discovery (as with every linux I have ever met). 2) I don't know if the mail relay I entered is valid. Kind regards Max

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Qlustar lists on new server
by roland.fehrenbacher＠q-leap.de 09 Sep '21

09 Sep '21

Hi, yesterday we migrated the Qlustar lists to a new server and the latest mailman 3 software release. Please ignore all test/unsubscribe messages you might have received. Hope you like the experience with the new setup. All the best, Roland

1 0

Qlustar stuff
by rfpr＠q-leap.de 08 Sep '21

08 Sep '21

Hi There

1 0

Security/Bug fix releases 12.0.0.6-b542f1396 / 11.0.1.10-b543f1397
by Qlustar List 04 Sep '21

04 Sep '21

The Qlustar releases 12.0.0.6-b542f1396 and 11.0.1.10-b543f1397 are ready including a number of security/bug fixes and improvements. Please check the following web pages for details about all security fixes and special update instructions: https://qlustar.com/qsa/2021/0903211 https://qlustar.com/qsa/2021/0903212 The following non-security related enhancements/bug fixes are included: For 12.0 only: - QluMan 12.0.4.8 (GUI update to 12.0.4.8 needed as well) * NameServiceConfig: remove sssd restart commands * Indicate authentification method for LDAP users in GUI * Make NFS v3 the default for NFS mounts * Fix hostname override for non-primary networks * Fix slurm account creation * Fix focus loss in wizards * Fixes for AD import * Fix broken Slurm Job FilterEditor * Fix occasional exceptions in Slurm job updates * Fix network priority management in FS mounts

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Qlustar General September 2021