thank you, however, because this is change in the data center, the names of the servers contain datacenter names as well in its hostname and in fqdn as well, hence i have to change both, hostnames as well as ip addresses, compulsorily, to given hostnames as per new DC names.
On Mon, 24 Apr 2023 at 11:25, Ole Holm Nielsen <ole.h.niel...@fysik.dtu.dk> wrote: > On 4/24/23 06:58, Purvesh Parmar wrote: > > thank you, but its change of hostnames as well, apart from ip addresses > > as well of the slurm server, database serverver name and slurmd compute > > nodes as well. > > I suggest that you talk to your networking people and request that the old > DNS names be created in the new network's DNS for your Slurm cluster. > Then Ryan's solution will work. Changing DNS names is a very simple > matter! > > My 2 cents, > Ole > > > > On Mon, 24 Apr 2023 at 10:04, Ryan Novosielski <novos...@rutgers.edu > > <mailto:novos...@rutgers.edu>> wrote: > > > > I think it’s easier than all of this. Are you actually changing names > > of all of these things, or just IP addresses? It they all resolve to > > an IP now and you can bring everything down and change the hosts > files > > or DNS, it seems to me that if the names aren’t changing, that’s > that. > > I know that “scontrol show cluster” will show the wrong IP address > but > > I think that updates itself. > > > > The names of the servers are in slurm.conf, but again, if the names > > don’t change, that won’t matter. If you have IPs there, you will need > > to change them. > > > > Sent from my iPhone > > > > > On Apr 23, 2023, at 14:01, Purvesh Parmar <purveshp0...@gmail.com > > <mailto:purveshp0...@gmail.com>> wrote: > > > > > > Hello, > > > > > > We have slurm 21.08 on ubuntu 20. We have a cluster of 8 nodes. > > Entire slurm communication happens over 192.168.5.x network (LAN). > > However as per requirement, now we are migrating the cluster to other > > premises and there we have 172.16.1.x (LAN). I have to migrate the > > entire network including SLURMDBD (mariadb), SLURMCTLD, SLURMD. ALso > > the cluster network is also changing from 192.168.5.x to 172.16.1.x > > and each node will be assigned the ip address from the 172.16.1.x > > network. > > > The cluster has been running for the last 3 months and it is > > required to maintain the old usage stats as well. > > > > > > > > > Is the procedure correct as below : > > > > > > 1) Stop slurm > > > 2) suspend all the queued jobs > > > 3) backup slurm database > > > 4) change the slurm & munge configuration i.e. munge conf, mariadb > > conf, slurmdbd.conf, slurmctld.conf, slurmd.conf (on compute nodes), > > gres.conf, service file > > > 5) Later, do the update in the slurm database by executing below > > command > > > sacctmgr modify node where node=old_name set name=new_name > > > for all the nodes. > > > ALso, I think, slurm server name and slurmdbd server names are > also > > required to be updated. How to do it, still checking > > > 6) Finally, start slurmdbd, slurmctld on server and slurmd on > > compute nodes > > > > > > Please help and guide for above. > > > > > > Regards, > > > > > > Purvesh Parmar > > > INHAIT > >
