Updating fstab and exports
==========================

Policy
------

o Want to make it easy for people to add extra (unbacked) disk to the
  nodes if they need it.
o By adding disk to the nodes that people actually run code on we
  hope to make the system less reliant on pop01 and keep network
  traffic to a minimum. 
  
===============================================================================

4Aug98 - Simeon Warner

Added 8.4GB disk to pop09 for smc. Added it to fstab on that machine and
for nfs to others. Made scipts for updating /etc/fstab and /etc/exports
files automatically (see below)

After doing update.exports must do killall -HUP rpc.mountd rpc.nfsd on
machines with new exports.

After doing update.fstab must do pop.exec 'mount -a' to mount all entries
on all nodes.

===== /etc/fstab ==============================================================

created directory /home1/root/fstab
- files with machine name are for copying to /etc/fstab on that machine
- file called generic is used for /etc/fstab on machine without specific 
  entry
- update.fstabs does copying to all machines

update.fstabs:
#!/usr/bin/perl
#
# Script for updating fstabs
#
# Must be run from directory with fstab files names with
# the node names, else generic will be used
# Simeon Warner - 4Aug98

$myname="update.fstabs";
$nodelistfile="/root/NODELIST";
$target="/etc/fstab";
$generic="generic";

if (($#ARGV>0) || ($ARGV[0]=~/h/i)) {
  die "$myname: Usage  $myname [ machine ]\n";
}

@machines=();
if ($#ARGV==0) {
  push(@machines,$ARGV[0]);
} else {
  # get list of machines from NODELIST file
  print "$myname: Reading node list\n";
  open(NODES,"<$nodelistfile") || die "$myname: Failed to upen $nodelistfile.";
  while ($node=<NODES>) {
    chop($node);
    unless (($node =~/#/) || ($node eq "") || ($node!~/^\w+$/)) {
      push(@machines,$node);
    } else {
      print "  ignoring '$node'\n";
    }
  }
}

print "Copying $from to $to on...\n";
foreach $node (@machines) {
  system("echo -n '$node '");
  if (-f $node) {
    system("scp $node $node:$target");
  } else {
    system("scp $generic $node:$target");
  }
} 
print "...done.\n";
##end of update.fstabs


Current files are:

>>>>>>>>>>>>>>>pop01
#
# /etc/fstab
#
# You should be using fstool (control-panel) to edit this!
#
# <device>      <mountpoint>   <filesystemtype> <options> <dump> <fsckorder>
/dev/hda1       /               ext2            defaults        1 1
/dev/hda5       /tmp            ext2            defaults        1 2
/dev/cdrom      /mnt/cdrom      iso9660         noauto,ro       0 0
/dev/fd0        /mnt/floppy     ext2            noauto          0 0
/dev/hda2       none            ignore          0               0 0
/dev/hdb1       /home1          ext2            defaults,usrquota 1 3
none            /proc           proc            defaults
/dev/hda6       none            swap            sw
#
#
pop09:/disk09a  /disk09a        nfs             rw              0 0

>>>>>>>>>>>>>>>pop09
#
# /etc/fstab
#
#
# <device>      <mountpoint>    <fstype> <options> <dump> <fsckorder>
/dev/hda1       /               ext2    defaults        1 1
/dev/hda5       /tmp            ext2    defaults        1 2
/dev/hda6       swap            swap    defaults        0 0
/dev/fd0        /mnt/floppy     ext2    noauto          0 0
/dev/cdrom      /mnt/cdrom      iso9660 noauto,ro       0 0
/dev/hdb1       /disk09a        ext2    defaults        2 3
none            /proc           proc    defaults        0 0
#
#
pop01:/home1    /home1          nfs     rw              0 0

>>>>>>>>>>>>>>>generic
#
# /etc/fstab
#
#
# <device>      <mountpoint>    <fstype> <options> <dump> <fsckorder>
/dev/hda1       /               ext2    defaults                1 1
/dev/hda5       /tmp            ext2    defaults                1 2
/dev/hda6       swap            swap    defaults                0 0
/dev/fd0        /mnt/floppy     ext2    noauto                  0 0
/dev/cdrom      /mnt/cdrom      iso9660 noauto,ro               0 0
none            /proc           proc    defaults                0 0
#
#
pop01:/home1    /home1          nfs     rw                      0 0
pop09:/disk09a  /disk09a        nfs     rw                      0 0

===== /etc/export =============================================================

created directory /home1/root/exports
- files with machine name are for copying to /etc/exports on that machine
- file called generic is used for /etc/exports on machine without specific 
  entry
- update.exports does copying to all machines

update.exports:
#!/usr/bin/perl
#
# Script for updating exports
#
# Must be run from directory with files names with
# the node names, else generic will be used
# Simeon Warner - 4Aug98

$myname="update.exports";
$nodelistfile="/root/NODELIST";
$target="/etc/exports";
$generic="generic";

if (($#ARGV>0) || ($ARGV[0]=~/h/i)) {
  die "$myname: Usage  $myname [ machine ]\n";
}

@machines=();
if ($#ARGV==0) {
  push(@machines,$ARGV[0]);
} else {
  # get list of machines from NODELIST file
  print "$myname: Reading node list\n";
  open(NODES,"<$nodelistfile") || die "$myname: Failed to upen $nodelistfile.";
  while ($node=<NODES>) {
    chop($node);
    unless (($node =~/#/) || ($node eq "") || ($node!~/^\w+$/)) {
      push(@machines,$node);
    } else {
      print "  ignoring '$node'\n";
    }
  }
}

print "Copying $from to $to on...\n";
foreach $node (@machines) {
  system("echo -n '$node '");
  if (-f $node) {
    system("scp $node $node:$target");
  } else {
    system("scp $generic $node:$target");
  }
} 
print "...done.\n";
### end of update.exports

>>>>>>>>>>>>>pop01
/home1          pop*(rw,no_root_squash)
/kickstart      pop*(ro)
/               pop*(ro,no_root_squash)

>>>>>>>>>>>>>pop09
/disk09a                pop*(rw)

>>>>>>>>>>>>>generic
# Nothing


===============================================================================