[slurm-users] Frontend node mode issues identified in v22.05.2

[Jordi Blasco]

Thank Ole,

I checked the /etc/nsswitch.conf and I have even setup a dnsmasq service,
just in case.

[root at slurm-simulator /]# cat /etc/nsswitch.conf | grep hosts
# Valid databases are: aliases, ethers, group, gshadow, hosts,
hosts:      files dns myhostname

[root at slurm-simulator /]# ping slurm-simulator -c 1
PING slurm-simulator (172.17.0.4) 56(84) bytes of data.
64 bytes from slurm-simulator (172.17.0.4): icmp_seq=1 ttl=64 time=0.022 ms

--- slurm-simulator ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.022/0.022/0.022/0.000 ms

[root at slurm-simulator /]# cat /etc/resolv.conf | grep -v "^#"
nameserver 172.17.0.4
nameserver 172.31.0.2
search eu-west-3.compute.internal
[root at slurm-simulator /]# host slurm-simulator
slurm-simulator has address 172.17.0.4
[root at slurm-simulator /]# host 172.17.0.4
4.0.17.172.in-addr.arpa domain name pointer slurm-simulator.


Regards,

Jordi



On Mon, 11 Jul 2022 at 23:09, Ole Holm Nielsen <Ole.H.Nielsen at fysik.dtu.dk>
wrote:

> On 7/11/22 12:54, Jordi Blasco wrote:
> > I use the front-end node mode
> > <https://slurm.schedmd.com/faq.html#multi_slurmd> to emulate a real
> > cluster in order to validate the Slurm configuration in a Docker
> container
> > and develop custom plugins. With versions 21.08.8-2 and 22.05.2, slurmd
> is
> > complaining about not being able to find the frontend node.
> >
> > slurmd -D -vvv
> > ...
> > slurmd: error: _find_node_record: lookup failure for node
> "slurm-simulator"
> > slurmd: error: _find_node_record: lookup failure for node
> > "slurm-simulator", alias "slurm-simulator"
> > slurmd: error: slurmd initialization failed
>
> This could be a DNS lookup issue.  Can you ping the node named
> "slurm-simulator"?
>
> /Ole
>
>
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