Re: [BProc] partitioning, scyld

[Michal J. <mi...@ha...>]

On Sat, Aug 28, 2004 at 03:01:02PM -0500, Luke Palmer wrote:
> I can't just do 'bpsh X fdisk' because the /dev filesystem isn't
> present on slave nodes.

There is, although various special files you would like to have
in the specific situation may be not there; but nothing prevents
you from adding these.  A simple way is to use 'plugin miscfiles'
directive in your node_up.conf and add whatever devices you would
like to see.

Alternatively something in that style will do (assuming that you
want all /dev/hda* on nodes - as an example ):

find /dev -name 'hda*' | cpio -o -c --quiet | \
  bpsh $node cpio --quiet -imd

for every "$node" you want that to happen.  This can be run from
'node_up' script, or later, or separately.  Whatever you
need/desire.  'tar' instead of 'cpio' will do as well as GNU tar
handles special device files too and there are still some other
ways to accomplish that goal.

> So- what's a good way to partition?

'sfdisk' run on nodes is handy as you can feed it a requested
partitioning scheme from stdin.  You may need some additional
libraries for that and 'ldd' will tell you what they are.  Add them
to your configuration or copy to nodes similar like the above and
you are set.  Scripting that is a good idea .:-)   For a specific
situation that will be a few lines; things are getting longer
if you are trying to be general.

You will likely need still some other shared libraries if you
would want to set some file systems, or run 'mkswap', on
freshly created disk partitions.

On 2004/Aug/20 I posted a message with a subject "Note on modules on
nodes (NFS support in particular)" which included a sample script.
Techniques demonstrated there apply here as well.

   Michal