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October 2021

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[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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Security/Bug fix releases 12.0.0.7-b542f1400 / 11.0.1.11-b543f1399
by Qlustar List 19 Oct '21

19 Oct '21

The Qlustar releases 12.0.0.7-b542f1400 and 11.0.1.11-b543f1399 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/2021/1019211 https://qlustar.com/qsa/2021/1019212 The following non-security related enhancements/bug fixes are included: For 12.0 only: - QluMan 12.0.5.0 (GUI update to 12.0.5.0 needed as well) * Improve Slurm JobManagement interface - Add quick-search filter - Make server <-> client job updates much more efficient - Improve job filters - Allow actions (e.g. kill job) on jobs with different states - Fix jobs not getting removed * Improve Slurm NodeState Management GUI dialogs - name enclosures after their hosts - filter enclosure view items to show only slurm nodes - fix exception sorting enclosures * qluman-slurmd: Avoid memory leak in pyslurm creating data classes * FilesystemExports Widget - Correct network priorities when changing servers - fix broken priorities when an entry is displayed * FilesystemMounts - select server name for exports in the network of the server with a gateway - try to match NIC types for gateways * Add GlobalProp SearchDomains by default, change seperator to " " add DNS search domains to /etc/resolv.conf - Add cleanup for stale unionfs files upon boot - Update Nvidia driver to 470.74 - slurm module * Update to 20.02.7 * Fix a memory leak in the job structure

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