Hi all, Does anyone use SLURM in a scenario where there is an iptables firewall on the compute nodes on the same network it uses to communicate with the SLURM controller and DBD machine?
I have the very basic situation where ... 1. There is no iptables firewall enabled at all on the SLURM controller/DBD machine. 2. Compute nodes are set to permit all ports and protocols from the SLURM controller with a rule like: -A INPUT -s IP.of.SLURM.controller/32 -j ACCEPT If I enable this on the compute nodes, they flap up in down in "Not responding state". If I switch off the firewall on the compute nodes, they work fine. When firewall is up on the compute nodes, SLURM controller can ping compute nodes, no problem. I have no reason to believe all ports and protocols are not being passed. Time is synched. No trouble accessing slurm.conf on any of the clients. Has anyone seen this before? There seems to be very little information about SLURM's interactions with iptables. I know this is kind of a funky scenario but regulatory requirements have me needing to tighten down our cluster network a little bit. Is this like a latency issue, or ...? Thanks, Sean
