[slurm-users] Which ports does slurm use?

[dean.w.schulze at gmail.com]

The firewalls are disabled on all nodes on my cluster so I don't think it is a firewall issue.  It's probably our network security between the wired part of our network and the wireless side.  When I put the nodes back on a wired controller they work again.


-----Original Message-----
From: slurm-users <slurm-users-bounces at lists.schedmd.com> On Behalf Of Ole Holm Nielsen
Sent: Friday, February 7, 2020 2:34 PM
To: slurm-users at lists.schedmd.com
Subject: Re: [slurm-users] Which ports does slurm use?

On 06-02-2020 22:40, Dean Schulze wrote:
> I've moved two nodes to a different controller.  The nodes are wired 
> and the controller is networked via wifi.  I had to open up ports 6817 
> and
> 6818 between the wired and wireless sides of our network to get any 
> connectivity.
> 
> Now when I do
> 
> srun -N2 hostname
> 
> the jobs show connection timeouts on the nodes:
> 
> [2020-02-06T14:24:37.183] launch task 60.0 request from UID:1000
> GID:1000 HOST:10.204.18.232 PORT:19602 [2020-02-06T14:24:37.183] 
> lllp_distribution jobid [60] implicit auto
> binding: cores, dist 8192
> [2020-02-06T14:24:37.183] _task_layout_lllp_cyclic 
> [2020-02-06T14:24:37.183] _lllp_generate_cpu_bind jobid [60]: 
> mask_cpu,
> 0x0101
> [2020-02-06T14:24:37.184] _run_prolog: run job script took usec=6 
> [2020-02-06T14:24:37.184] _run_prolog: prolog with lock for job 60 ran 
> for 0 seconds [2020-02-06T14:24:45.224] [60.0] error: connect io: 
> Connection timed out [2020-02-06T14:24:45.224] [60.0] error: IO setup 
> failed: Connection timed out [2020-02-06T14:24:45.225] [60.0] error: 
> job_manager exiting abnormally, rc = 4021 [2020-02-06T14:24:59.538] 
> [60.0] error: _send_launch_resp: Failed to send RESPONSE_LAUNCH_TASKS: 
> Connection timed out [2020-02-06T14:24:59.551] [60.0] done with job
> 
> That node used port 19602 and the other node was using port 12496.  
> When I did the srun again the jobs showed two different ports on the 
> nodes
> (58040 and 32392).
> 
> How can I configure a network if srun is going to grab different ports 
> each time?

Perhaps the information about firewall setup in my Wiki page can be of use:
https://wiki.fysik.dtu.dk/niflheim/Slurm_configuration#configure-firewall-for-slurm-daemons

/Ole