Re: Compute Farm

[Jerzy Kakol <kakol@angband.microb.uni.wroc.pl>]

Hi all,

Except cfengine there is another hopefully better because debian specific 
solution I discovered recently installing hamm. I mean 

# dpkg --root=/another_machine_root_dir <deb_file>

Think about the great possibilities it gives! Let's assume

# mkdir /var/lib/dpkg/DebianFarm
# for i in $FarmMachineNames ; do {
>    mkdir /var/lib/dpkg/DebianFarm/$i; 
>    mount -t nfs $i:/ /var/lib/dpkg/$i
> }; done

Then we can at any time do:

# for i in $FarmMachineNames ; do 
> dpkg --install --root=/var/lib/dpkg/DebianFarm/$i <deb_package>;
> done

Of course it doesn't eliminate cfengine because such scripts may serve 
only for instalation purposes. But installing the full system takes at 
least an hour counting from the first dselect start. In this particular 
case it allows to save 200 hours. 

BTW, it appears to be neccessary to have a possibility of using dselect 
to choose packages and resolve all conflicts/dependencies and then export 
package names IN PROPER ORDER (this is probably one of hamm's bugs) to a 
file which could be an argument for the script proposed above. Is it 
possible?

--  Jerzy Kakol


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