Oscar requires all local interface traffic to be unrestricted.
This document describes how to set up a system with two interfaces so that
one network interface is firewalled and the other one is just an
internal/external network gateway. It works quite nicely with OSCAR, at
least it is more or less what I am using.
http://tldp.org/HOWTO/IP-Masquerade-HOWTO/
I may try to fold this into an "OSCAR package" at some point, but I probably
won't get around to it.
On 4/25/07, Pravab J. Rana <[EMAIL PROTECTED]> wrote:
It is working fine now. I disabled the firewall on the headnode
temporarily. Now the nfs is mounting properly.
Thanks for the suggestions.
On 4/25/07, Michael Edwards <[EMAIL PROTECTED] > wrote:
> For me the problem is usually that I have not let the head node boot
> completely before booting the nodes.
>
> If not, I would start looking in the /var/log/messages for nfs related
> messages on the head and client nodes.
>
> Running a firewall with nfs is difficult, you should turn off any
> firewalls on the system (and SE Linux) and see if that fixes the problem.
>
> If nfs is not working, basically nothing will work quite right. Most of
> the packages in OSCAR assume the /home directory is present on all the
> nodes.
>
>
> On 4/25/07, Pravab J. Rana < [EMAIL PROTECTED]> wrote:
>
> > Hi,
> > I checked the flies /etc/passwd and /etc/groups and they exist. I also
> > tried the post_install script but that didn't help much either. The same
> > problem remains.
> > While rebooting I noticed that the mounting of the nfs filesystem
> > fails in client nodes. This could be the cause of the problem I guess. I
> > still have not figured out why the nfs filesystem mounting is failing. Any
> > suggestions !!
> >
> > Thanks
> >
> > On 4/25/07, Kim, DongInn <[EMAIL PROTECTED]> wrote:
> > >
> > > Hi Pravab,
> > >
> > > I think you'd better run the script
> > > "$OSCAR_HOME/packages/opium/scripts/post_install" manually.
> > > The "post_install" script will take care of all the synchronization
> > > of
> > > accounts in the OSCAR cluster.
> > > And then try to access other nodes with the new user account.
> > >
> > > Regards,
> > >
> > > - DongInn
> > >
> > > Pravab J. Rana wrote:
> > > > Hi Michael,
> > > > Yes the home directory is present on head node and password free
> > > ssh
> > > > works for the root account.
> > > > By clock synchronization do you mean the system time. The system
> > > time
> > > > of the cluster nodes seems to be running a little late by about
> > > 1.5
> > > > mins with the headnode.
> > > > Is there anything else I could try
> > > >
> > > > On 4/23/07, *Michael Edwards* < [EMAIL PROTECTED]
> > > > <mailto:[EMAIL PROTECTED] >> wrote:
> > > >
> > > > Is the users home directory present on the head node in /home?
> > >
> > > >
> > > > /home is shared over nfs by default so if the directory is
> > > present
> > > > on the head it should be present on the nodes.
> > > >
> > > > Are the clocks on all the nodes sychronized? If they are too
> > > far
> > > > off nfs may not realize that new files are available to share.
> > > > Does passwordless ssh work for root?
> > > >
> > > > The OSCAR environment should take care of setting up the
> > > password
> > > > free ssh the first time the new user logs in, but if their
> > > home
> > > > directory is not being shared out to the nodes it won't work
> > > > because it relies on files there.
> > > >
> > > > On 4/23/07, *Pravab J. Rana* < [EMAIL PROTECTED]
> > > > <mailto:[EMAIL PROTECTED] >> wrote:
> > > >
> > > > Hi,
> > > > We have been using a newly installed Oscar Cluster and
> > > want to
> > > > add new users to the system.
> > > > I used "/opt/sync_files/bin/sync_files --force" to
> > > propagate
> > > > new users added in the headnode to the other nodes.
> > > > My problem is whenever I am trying to login to othernodes
> > > > using the new account, the login is successful but it is
> > > > showing me an error message saying that there is no home
> > > > directory for that user.
> > > > Is there any other scripts that I should be using or if I
> > > am
> > > > missing any parameters.
> > > >
> > > > Once logged into the headnode, I also wanted to be able to
> > > ssh
> > > > to other nodes without having to reenter the password. I
> > > think
> > > > the OPIUM package should have been able to do this. I was
> > > > wondering if this was also related to the first problem of
> > >
> > > > user account synchronization.
> > > > Any Suggestions.!!
> > > >
> > > > Thanks
> > > >
> > > >
> > > >
> > > >
> > > >
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