<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr"><div>Make sure slurmd on the client is stopped, and then run it in verbose mode in the foreground</div><div><br></div><div>e.g.</div><div><br></div><div>/usr/local/slurm/latest/sbin/slurmd -D -vvvvv</div><div><br></div><div>Then post the output<br></div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">--<br>Sean Crosby | Senior DevOpsHPC Engineer and HPC Team Lead<br>Research Computing Services | Business Services<br>The University of Melbourne, Victoria 3010 Australia<br><br></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 24 Aug 2020 at 21:11, Lars Kloo <<a href="mailto:larsa@kth.se">larsa@kth.se</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-GB"><div><div style="color:rgb(0,0,0);font-size:12px;text-align:left;font-family:Helvetica,Arial,sans-serif"><strong><table style="width:100%;float:left;background-color:lemonchiffon" cellspacing="0" cellpadding="5" border="1">
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<td><b>UoM notice: </b>External email. Be cautious of links, attachments, or impersonation attempts</td>
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</table></strong><br></div><hr></div><div class="gmail-m_2476182093536264129WordSection1"><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)">Thanks Sean,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)">Yes, the regular slurm commands work from the client.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)">The firewalld daemon have been stopped/disabled, and iptables are set to let everything through, on both the master and the client. I should have mentioned that in the list of prerequisites in my initial e-mail.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)">Best regards,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)">Lars<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:11pt;font-family:"Calibri",sans-serif" lang="SV">Från:</span></b><span style="font-size:11pt;font-family:"Calibri",sans-serif" lang="SV"> slurm-users [mailto:<a href="mailto:slurm-users-bounces@lists.schedmd.com" target="_blank">slurm-users-bounces@lists.schedmd.com</a>] <b>För </b>Sean Crosby<br><b>Skickat:</b> den 24 augusti 2020 12:45<br><b>Till:</b> Slurm User Community List <<a href="mailto:slurm-users@lists.schedmd.com" target="_blank">slurm-users@lists.schedmd.com</a>><br><b>Ämne:</b> Re: [slurm-users] [EXT] Slurmd problem on client<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">Hi Lars,<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Do the regular slurm commands work from the client?<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">e.g. <u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">squeue<u></u><u></u></p></div><div><p class="MsoNormal">scontrol show part<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">If they don't, it would be a sign of communication problems.<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Is there a software firewall running on the master/client? <u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Sean<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><div><div><p class="MsoNormal" style="margin-bottom:12pt">--<br>Sean Crosby | Senior DevOpsHPC Engineer and HPC Team Lead<br>Research Computing Services | Business Services<br>The University of Melbourne, Victoria 3010 Australia<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Mon, 24 Aug 2020 at 20:02, Lars Kloo <<a href="mailto:larsa@kth.se" target="_blank">larsa@kth.se</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right:0cm"><div><div><table style="width:100%;background:lemonchiffon none repeat scroll 0% 0%;float:left" width="100%" cellspacing="0" cellpadding="0" border="1"><tbody><tr><td style="padding:3.75pt"><p class="MsoNormal"><b>UoM notice: </b>External email. Be cautious of links, attachments, or impersonation attempts<u></u><u></u></p></td></tr></tbody></table><p class="MsoNormal"><u></u> <u></u></p><div class="MsoNormal" style="text-align:center" align="center"><hr width="100%" size="2" align="center"></div></div><div><p class="MsoNormal">Hello,<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">I have a client slurmd problem, that I cannot really figure out how to solve. I would be grateful for any suggestions on how to move forward.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">The master computer on a small local calculational cluster is getting quite old, and therefore I am currently in the process of exchanging it. I also use one calculational node for the basic master-client set-up of all programs, including slurm. Some basic data: CentOS 7.7, slurm 20.02.4.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Setting up the systemctld on the master node is (seemingly) straightforward. Getting slurmd to work on the client appears more complicated. I get the following error message (journalctl –xe) when starting slurmd on the client:<u></u><u></u></p><p class="MsoNormal">Aug 24 11:01:34 cpu3.calc.cluster slurmd[9002]: error: _fetch_child: failed to fetch remote configs<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">No useful error messages are obtained from ‘systemctl –l status slurmd.service’ on the client, slurmd.log on the client, nor slurmctld.log on the master.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">In this context, the following should be noted:<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>root and test user exist on the master and client; same uid and gid on both machines<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>ping works in both directions (master <-> client)<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>passphrase-free ssh login work in both directions for both root and for a test user<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>munged is running and with the same key on both machines<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>the same slurm.conf is read from the master and from the client<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>named (bind) has been set up on the master, and nslookup and dig work properly on the client<u></u><u></u></p><p class="gmail-m_2476182093536264129gmail-m7923536546226815014msolistparagraph">-<span style="font-size:7pt"> </span>the ‘forward’ zone file of named on the master (DNS) contains the recommended SRV record directing slurmctld requests to port 6817 on the master (syntax seems ok, i.e. no error messages)<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">I have also tried to start slurmd in a config-less mode (slurm.conf edited on the master) with the suggested environment variable set (slurmd on the client). Then, slurmd starts without error messages, but slurmctld on the master cannot communicate with slurmd on the client.<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Has anyone encountered a similar problem --- and how did you solve it? Or, do you have any suggestions where to start looking?<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Many thanks for input, and best regards,<u></u><u></u></p><p class="MsoNormal">Lars<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)">//////////////////////////////~~~_/)~~~\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)"> Lars Kloo, Prof.</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)"> Tillämpad fysikalisk kemi Applied Physical Chemistry</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)"> Institutionen för kemi Dept. of Chemistry</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)"> Kungliga Tekniska högskolan Royal Inst. of Technology (KTH)</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)"> </span><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US">100 44 STOCKHOLM SE-100 44 Stockholm</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> SWEDEN</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> Tel: 08-790 9343 Tel: +46-8-790 9343</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> Fax: 08-790 9349 Fax: +46-8-790 9349</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> E-post: </span><a href="mailto:lakloo@kth.se" target="_blank"><span style="font-family:"Courier New";color:purple" lang="EN-US">lakloo@kth.se</span></a><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> E-mail: </span><a href="mailto:lakloo@kth.se" target="_blank"><span style="font-family:"Courier New";color:purple" lang="EN-US">lakloo@kth.se</span></a><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US"> WWW: </span><a href="http://www.kth.se/che/divisions/tfk" target="_blank"><span style="font-family:"Courier New";color:purple" lang="EN-US">http://www.kth.se/che/divisions/tfk</span></a><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Courier New";color:rgb(31,73,125)" lang="EN-US">\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\~~~_/)~~~//////////////////////////////</span><u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p></div></div></blockquote></div></div></div>
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