Question on nfsroot shared by multiple targets

Question on nfsroot shared by multiple targets

[Johan Borkhuis]

Hello,

I have the following setup: one server, with DHCP server and NFS-root 
for an embedded target. With one target this works OK, but now I want to 
add another target. The problem I see is that both targets are going to 
write into the same logfiles and lockfiles.
I did setup the DHCP server in such a way that the NFS-root of the 
target points to /nfsroot/<last octet of IP address>. But for this to 
work I need a copy of the complete tree for each target board. I would 
prefer to have only one tree for all targets, as this saves the effort 
of keeping all trees in sync.
I could create a smaller NFS-root per target, with only /etc, /var and 
some other directories and mount-points and mount all directories from a 
central nfsroot using the local fstab in /etc. This could work for /var, 
but I would still need to keep /etc in sync.

Is there another way to do this, or is this the correct way to setup a 
multi-target system?

Kind regards,
    Johan Borkhuis

Re: Question on nfsroot shared by multiple targets

[Ajit Singh]

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Johan,

The way i had done it was creating a read only partition for the / (root) 
filesystem. The /var partition was the only one created seperately for the 
different mounted systems. The additional work done was to have a /var/etc 
with the links made from the /etc directory for the files that need change 
across the system. The entries softlink and if any file ctreation was done 
in the rcS scripts. It would take a bit of time, but it works.

regards
Ajit


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Johan Borkhuis <j.borkhuis@dutchspace.nl> 
Sent by: 
linuxppc-embedded-bounces+ajit.singh=vihaannetworks.com@ozlabs.org
06/11/07 02:18 PM

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Subject
Question on nfsroot shared by multiple targets






Hello,

I have the following setup: one server, with DHCP server and NFS-root 
for an embedded target. With one target this works OK, but now I want to 
add another target. The problem I see is that both targets are going to 
write into the same logfiles and lockfiles.
I did setup the DHCP server in such a way that the NFS-root of the 
target points to /nfsroot/<last octet of IP address>. But for this to 
work I need a copy of the complete tree for each target board. I would 
prefer to have only one tree for all targets, as this saves the effort 
of keeping all trees in sync.
I could create a smaller NFS-root per target, with only /etc, /var and 
some other directories and mount-points and mount all directories from a 
central nfsroot using the local fstab in /etc. This could work for /var, 
but I would still need to keep /etc in sync.

Is there another way to do this, or is this the correct way to setup a 
multi-target system?

Kind regards,
    Johan Borkhuis


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