Hi,
The error is from getFacingIP function. This function takes a node name
as an input. Then it
find out the ip of the given node. Then it call "ifconfig" on the local
host. Then it try to see if the node ip and local host is within the same
subnet or not. (Please see the code below). The error usually happens when
the name resolution on the local host cannot resolve the given node. Hope
it helps.
#-------------------------------------------------------------------------------
=head3 getFacingIP
Gets the ip address of the adapter of the localhost that is facing
the
the given node.
Arguments:
The name of the node that is facing the localhost.
Returns:
The ip address of the adapter that faces the node.
=cut
#-------------------------------------------------------------------------------
sub getFacingIP
{
my ($class, $node) = @_;
my $ip;
my $cmd;
my @ipaddress;
my $nodeip = inet_ntoa(inet_aton($node));
unless ($nodeip =~ /\d+\.\d+\.\d+\.\d+/)
{
return 0; #Not supporting IPv6 here IPV6TODO
}
$cmd = "ifconfig" . " -a";
$cmd = $cmd . "| grep \"inet \"";
my @result = xCAT::Utils->runcmd($cmd, 0);
if ($::RUNCMD_RC != 0)
{
xCAT::MsgUtils->message("S", "Error from $cmd\n");
exit $::RUNCMD_RC;
}
# split node address
my ($n1, $n2, $n3, $n4) = split('\.', $nodeip);
foreach my $addr (@result)
{
my $ip;
my $mask;
if (xCAT::Utils->isLinux())
{
my ($inet, $addr1, $Bcast, $Mask) = split(" ", $addr);
if ((!$addr1) || (!$Mask)) { next; }
my @ips = split(":", $addr1);
my @masks = split(":", $Mask);
$ip = $ips[1];
$mask = $masks[1];
}
else
{ #AIX
my ($inet, $addr1, $netmask, $mask1, $Bcast, $bcastaddr) =
split(" ", $addr);
if ((!$addr1) && (!$mask1)) { next; }
$ip = $addr1;
$mask1 =~ s/0x//;
$mask =
`printf "%d.%d.%d.%d" \$(echo "$mask1" | sed 's/../0x&
/g')`;
}
if ($ip && $mask)
{
# split interface IP
my ($h1, $h2, $h3, $h4) = split('\.', $ip);
# split mask
my ($m1, $m2, $m3, $m4) = split('\.', $mask);
# AND this interface IP with the netmask of the network
my $a1 = ((int $h1) & (int $m1));
my $a2 = ((int $h2) & (int $m2));
my $a3 = ((int $h3) & (int $m3));
my $a4 = ((int $h4) & (int $m4));
# AND node IP with the netmask of the network
my $b1 = ((int $n1) & (int $m1));
my $b2 = ((int $n2) & (int $m2));
my $b3 = ((int $n3) & (int $m3));
my $b4 = ((int $n4) & (int $m4));
if (($b1 == $a1) && ($b2 == $a2) && ($b3 == $a3) && ($b4 ==
$a4))
{
return $ip;
}
}
}
xCAT::MsgUtils->message("S", "Cannot find master for the node
$node\n");
return 0;
}
Ling Gao
Poughkeepsie Unix Development Lab
IBM Systems and Technology Group
Internal: T/L 293-5692
External: [email protected], 845-433-5692
"I never worry about the future. It comes soon enough." --- Albert
Einstein
From: Russell Jones <[email protected]>
To: xCAT Users Mailing list <[email protected]>
Date: 12/07/2012 11:05 AM
Subject: [xcat-user] Cannot find master for the node $node
Hi all,
What circumstances have to be present for an xCAT 2.3 service node (old
I know, but upgrade is not an option at this time) to write to the logs:
Dec 7 09:16:33 service03 xCAT: Cannot find master for the node c25n25
All of our service nodes have been doing this for at least over a month
now, and we have just never noticed it before as nodes are
netbooting/installing fine. Just curious what the logic is in the code
that has this message being written out, just so that if it turns out to
be something we need to track down we know where to start.
Thanks!
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------------------------------------------------------------------------------
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Remotely access PCs and mobile devices and provide instant support
Improve your efficiency, and focus on delivering more value-add services
Discover what IT Professionals Know. Rescue delivers
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_______________________________________________
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[email protected]
https://lists.sourceforge.net/lists/listinfo/xcat-user
