[slurm-users] [EXT] Re: SlurmcltdHost confusion

[Jackson, Gary L.]

Listing the hosts separately does what I want.

There was nothing wrong with the individual hostnames. The comma separated list syntax just doesn't work.

-- 
Gary 




On 12/14/23, 7:14 AM, "slurm-users on behalf of Jens Elkner" <slurm-users-bounces at lists.schedmd.com <mailto:slurm-users-bounces at lists.schedmd.com> on behalf of jel+slurm at cs.ovgu.de <mailto:jel+slurm at cs.ovgu.de>> wrote:


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On Wed, Dec 13, 2023 at 08:16:39PM +0000, Jackson, Gary L. wrote:
Hi Gary,


> The SlurmctldHost value is set like the following in my slurm.conf:
> 
> SlurmctldHost=host0,host1
> 
> That seems to be legal according to the documentation. However, I get error messages like the following:
> 
> $ srun id
> 
> srun: error: get_addr_info: getaddrinfo() failed: Name or service not known
> srun: error: slurm_set_addr: Unable to resolve "host0,host1"
> srun: error: Unable to establish control machine address
> srun: error: Unable to allocate resources: Address already in use
...
> What’s going on?


Not sure, but I've seen such errors, when using a node name, which was not
"registered" via NodeName or discovered otherwise - a code lookup at
this time revealed, that the message is IMHO misleading: slurm does
__not__ make a DNS lookup - it simply greps its internal list of known
nodes and if not found, it emits such messages.


Other options: try to use SlurmctldHost=... for each host on a single
line to rule out a format errors. Not sure, whether it supports ranges,
too (like SlurmctldHost=host[0-1]) ,


Last but not least 'Address already in use' - checking, whether there is
not an instance or something else already listening on the related port
shouldn't hurt ...


Have fun,
jel.
-- 
Otto-von-Guericke University http://www.cs.uni-magdeburg.de/ <http://www.cs.uni-magdeburg.de/>
Department of Computer Science Geb. 29 R 027, Universitaetsplatz 2
39106 Magdeburg, Germany Tel: +49 391 67 52768




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