Open MPI generally needs to be able to communicate on random TCP ports between machines in the MPI job (and the machine where mpirun is invoked, if that is a different machine).
You could also open your firewall to trust random TCP connections just between the servers in your cluster. > On May 10, 2016, at 3:44 PM, Llolsten Kaonga <l...@soft-forge.com> wrote: > > Hello Orion, > > I actually rather like the new CentOS 7.2 system better and would like to > not remove firewalld. We will try Gilles' suggestion and see what happens. > > I thank you. > -- > Llolsten > > -----Original Message----- > From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Orion Poplawski > Sent: Tuesday, May 10, 2016 3:31 PM > To: Open MPI Users <us...@open-mpi.org> > Subject: Re: [OMPI users] mpirun command won't run unless the firewalld > daemon is disabled > > On 05/10/2016 09:24 AM, Llolsten Kaonga wrote: >> Hello Durga, >> >> As I mentioned earlier, up to version 1.8.2, we would just disable >> SELinux and the IPv4 firewall and things run smoothly. It was only >> when we installed version 1.10.2 (CentOS 7.2) that we run into these >> troubles. CentOS 7.2 no longer seems to bother with the IPv4 firewall, so > you can't do: >> >> >> >> # service iptables save >> >> # service iptables stop >> >> # chkconfig iptables off > > I'll just note that you can either embrace the new firewalld config (and use > firewall-cmd to open your needed ports) or you can remove firewalld and > install iptables-services and go back to the old iptables method of > configuring the firewall. If you don't want a firewall at all, just remove > firewalld. > > -- > Orion Poplawski > Technical Manager 303-415-9701 x222 > NWRA, Boulder/CoRA Office FAX: 303-415-9702 > 3380 Mitchell Lane or...@nwra.com > Boulder, CO 80301 http://www.nwra.com > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/05/29160.php > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/05/29161.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
