mirror of
https://github.com/xcat2/xcat-core.git
synced 2025-11-03 21:02:34 +00:00
861 lines
22 KiB
Perl
Executable File
861 lines
22 KiB
Perl
Executable File
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT_plugin::hosts;
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use strict;
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use warnings;
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use xCAT::Table;
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use xCAT::TableUtils;
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use xCAT::Utils;
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use xCAT::NetworkUtils;
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require xCAT::MsgUtils;
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use Data::Dumper;
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use File::Copy;
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use Getopt::Long;
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use Fcntl ':flock';
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my @hosts; #Hold /etc/hosts data to be written back
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my $LONGNAME;
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my $OTHERNAMESFIRST;
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my $ADDNAMES;
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my $MACTOLINKLOCAL;
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############# TODO - add return code checking !!!!!
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sub handled_commands
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{
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return {makehosts => "hosts",};
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}
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sub delnode
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{
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my $node = shift;
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my $ip = shift;
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unless ($node and $ip)
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{
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return;
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} #bail if requested to do something that could zap /etc/hosts badly
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my $othernames = shift;
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my $domain = shift;
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my $idx = 0;
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while ($idx <= $#hosts)
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{
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if (($ip and $hosts[$idx] =~ /^${ip}\s/)
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or $hosts[$idx] =~ /^\d+\.\d+\.\d+\.\d+\s+${node}[\s\.r]/)
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{
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$hosts[$idx] = "";
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}
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$idx++;
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}
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}
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sub addnode
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{
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my $callback = shift;
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my $node = shift;
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my $ip = shift;
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unless ($node and $ip)
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{
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return;
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} #bail if requested to do something that could zap /etc/hosts badly
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my $othernames = shift;
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my $domain = shift;
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my $nics = shift;
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my $idx = 0;
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my $foundone = 0;
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# if this ip was already added then just update the entry
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while ($idx <= $#hosts)
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{
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if ( $hosts[$idx] =~ /^${ip}\s/
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or $hosts[$idx] =~ /^\d+\.\d+\.\d+\.\d+\s+${node}[\s\.r]/)
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{
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if ($foundone)
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{
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$hosts[$idx] = "";
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}
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else
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{
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# we found a matching entry in the hosts list
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if ($nics) {
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# we're processing the nics table and we found an
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# existing entry for this ip so just add this
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# node name as an alias for the existing entry
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my ($hip, $hnode, $hdom, $hother)= split(/ /, $hosts[$idx]);
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# at this point "othernames", if any is just a space
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# delimited list - so just add the node name to the list
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$othernames .= " $node";
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$hosts[$idx] = build_line($callback, $ip, $hnode, $domain, $othernames);
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} else {
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# otherwise just try to completely update the existing
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# entry
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$hosts[$idx] = build_line($callback, $ip, $node, $domain, $othernames);
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}
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}
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$foundone = 1;
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}
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$idx++;
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}
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if ($foundone) { return; }
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my $line = build_line($callback, $ip, $node, $domain, $othernames);
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if ($line) {
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push @hosts, $line;
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}
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}
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sub build_line
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{
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my $callback = shift;
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my $ip = shift;
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my $node = shift;
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my $domain = shift;
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my $othernames = shift;
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my @o_names = ();
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my @n_names = ();
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if (defined $othernames)
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{
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# the "hostnames" attribute can be a list delimited by
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# either a comma or a space
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@o_names = split(/,| /, $othernames);
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}
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my $longname;
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foreach (@o_names)
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{
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if (($_ eq $node) || ($domain && ($_ eq "$node.$domain")))
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{
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$longname = "$node.$domain";
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$_ = "";
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}
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elsif ($_ =~ /\./)
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{
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if (!$longname)
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{
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$longname = $_;
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$_ = "";
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}
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}
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elsif ($ADDNAMES)
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{
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unshift(@n_names, "$_.$domain");
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}
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}
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unshift(@o_names, @n_names);
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my $shortname=$node;
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if ($node =~ m/\.$domain$/i)
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{
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$longname = $node;
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($shortname = $node) =~ s/\.$domain$//;
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}
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elsif ($domain && !$longname)
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{
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$shortname = $node;
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$longname = "$node.$domain";
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}
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# if shortname contains a dot then we have a bad syntax for name
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if ($shortname =~ /\./) {
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my $rsp;
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push @{$rsp->{data}}, "Invalid short node name \'$shortname\'. The short node name may not contain a dot. The short node name is considered to be anything preceeding the network domain name in the fully qualified node name \'$longname\'.\n";
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xCAT::MsgUtils->message("E", $rsp, $callback);
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return undef;
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}
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$othernames = join(' ', @o_names);
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if ($LONGNAME) { return "$ip $longname $shortname $othernames\n"; }
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elsif ($OTHERNAMESFIRST) { return "$ip $othernames $longname $shortname\n"; }
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else { return "$ip $shortname $longname $othernames\n"; }
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}
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sub addotherinterfaces
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{
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my $callback = shift;
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my $node = shift;
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my $otherinterfaces = shift;
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my $domain = shift;
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my @itf_pairs = split(/,/, $otherinterfaces);
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foreach (@itf_pairs)
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{
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my ($itf, $ip);
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if ($_ =~ /!/) {
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($itf, $ip) = split(/!/, $_);
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} else {
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($itf, $ip) = split(/:/, $_);
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}
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if ($ip && xCAT::NetworkUtils->isIpaddr($ip))
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{
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if ($itf =~ /^-/)
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{
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$itf = $node . $itf;
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}
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addnode $callback, $itf, $ip, '', $domain;
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}
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}
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}
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sub delotherinterfaces
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{
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my $node = shift;
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my $otherinterfaces = shift;
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my $domain = shift;
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my @itf_pairs = split(/,/, $otherinterfaces);
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foreach (@itf_pairs)
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{
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my ($itf, $ip);
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if ($_ =~ /!/) {
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($itf, $ip) = split(/!/, $_);
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} else {
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($itf, $ip) = split(/:/, $_);
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}
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if ($ip && xCAT::NetworkUtils->isIpaddr($ip))
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{
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if ($itf =~ /^-/)
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{
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$itf = $node . $itf;
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}
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delnode $itf, $ip, '', $domain;
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}
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}
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}
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sub add_hosts_content {
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my %args = @_;
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my $nodelist = $args{nodelist};
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my $callback = $args{callback};
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my $DELNODE = $args{delnode};
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my $domain = $args{domain};
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my $hoststab = xCAT::Table->new('hosts',-create=>0);
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my $hostscache;
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if ($hoststab) {
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$hostscache =
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$hoststab->getNodesAttribs($nodelist,
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[qw(ip node hostnames otherinterfaces)]);
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}
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foreach (@{$nodelist})
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{
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my $ref = $hostscache->{$_}->[0];
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my $nodename = $_;
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my $ip = $ref->{ip};
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if (not $ip) {
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$ip = xCAT::NetworkUtils->getipaddr($nodename); #attempt lookup
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}
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my $netn;
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($domain, $netn) = &getIPdomain($ip, $callback);
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if (!$domain) {
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if ($::sitedomain) {
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$domain=$::sitedomain;
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} elsif ($::XCATSITEVALS{domain}) {
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$domain=$::XCATSITEVALS{domain};
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} else {
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my $rsp;
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push @{$rsp->{data}}, "No domain can be determined for node \'$nodename\'. The domain of the xCAT node must be provided in an xCAT network definition or the xCAT site definition.\n";
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xCAT::MsgUtils->message("W", $rsp, $callback);
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next;
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}
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}
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if ($DELNODE)
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{
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delnode $nodename, $ip, $ref->{hostnames}, $domain;
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if (defined($ref->{otherinterfaces}))
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{
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delotherinterfaces $nodename, $ref->{otherinterfaces}, $domain;
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}
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}
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else
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{
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if (xCAT::NetworkUtils->isIpaddr($ip))
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{
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addnode $callback, $nodename, $ip, $ref->{hostnames}, $domain;
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}
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else
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{
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my $rsp;
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push @{$rsp->{data}}, "Invalid IP Addr \'$ref->{ip}\' for node \'$ref->{node}\'.";
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xCAT::MsgUtils->message("E", $rsp, $callback);
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}
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if (defined($ref->{otherinterfaces}))
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{
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addotherinterfaces $callback, $nodename, $ref->{otherinterfaces}, $domain;
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}
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}
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} #end foreach
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if ($args{hostsref}) {
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@{$args{hostsref}} = @hosts;
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}
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}
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sub process_request
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{
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Getopt::Long::Configure("bundling");
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$Getopt::Long::ignorecase = 0;
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Getopt::Long::Configure("no_pass_through");
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my $req = shift;
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my $callback = shift;
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my $dr = shift;
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my %extraargs = @_;
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my $HELP;
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my $VERSION;
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my $REMOVE;
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my $DELNODE;
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my $usagemsg =
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"Usage: makehosts <noderange> [-d] [-n] [-l] [-a] [-o] [-m]\n makehosts -h\n makehosts -v";
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# parse the options
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if ($req && $req->{arg}) { @ARGV = @{$req->{arg}}; }
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else { @ARGV = (); }
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# print "argv=@ARGV\n";
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if (
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!GetOptions(
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'h|help' => \$HELP,
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'n' => \$REMOVE,
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'd' => \$DELNODE,
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'o|othernamesfirst' => \$OTHERNAMESFIRST,
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'a|adddomaintohostnames' => \$ADDNAMES,
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'm|mactolinklocal' => \$MACTOLINKLOCAL,
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'l|longnamefirst' => \$LONGNAME,
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'v|version' => \$VERSION,
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)
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)
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{
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if ($callback)
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{
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my $rsp = {};
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$rsp->{data}->[0] = $usagemsg;
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xCAT::MsgUtils->message("I", $rsp, $callback);
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}
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else
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{
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xCAT::MsgUtils->message("I", $usagemsg . "\n");
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}
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return;
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}
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# display the usage if -h
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if ($HELP)
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{
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if ($callback)
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{
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my $rsp = {};
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$rsp->{data}->[0] = $usagemsg;
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xCAT::MsgUtils->message("I", $rsp, $callback);
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}
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else
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{
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xCAT::MsgUtils->message("I", $usagemsg . "\n");
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}
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return;
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}
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if ($VERSION)
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{
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my $version = xCAT::Utils->Version();
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if ($callback)
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{
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my $rsp = {};
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$rsp->{data}->[0] = $version;
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xCAT::MsgUtils->message("I", $rsp, $callback);
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}
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else
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{
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xCAT::MsgUtils->message("I", $version . "\n");
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}
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return;
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}
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# get site domain for backward compatibility
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my $sitetab = xCAT::Table->new('site');
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if ($sitetab) {
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my $dom = $sitetab->getAttribs({key=>'domain'},'value');
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if ($dom and $dom->{value}) {
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$::sitedomain=$dom->{value};
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}
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}
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my $hoststab = xCAT::Table->new('hosts');
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my $domain;
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my $lockh;
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@hosts = ();
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if ($REMOVE)
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{
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if (-e "/etc/hosts")
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{
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my $bakname = "/etc/hosts.xcatbak";
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rename("/etc/hosts", $bakname);
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# add the localhost entry if trying to create the /etc/hosts from scratch
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if ($^O =~ /^aix/i)
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{
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push @hosts, "127.0.0.1 loopback localhost\n";
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}
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else
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{
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push @hosts, "127.0.0.1 localhost\n";
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}
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}
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}
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else
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{
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if (-e "/etc/hosts")
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{
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my $bakname = "/etc/hosts.xcatbak";
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copy("/etc/hosts", $bakname);
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}
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# the contents of the /etc/hosts file is saved in the @hosts array
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# the @hosts elements are updated and used to re-create the
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# /etc/hosts file at the end by the writeout subroutine.
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open($lockh, ">", "/tmp/xcat/hostsfile.lock");
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flock($lockh, LOCK_EX);
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my $rconf;
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open($rconf, "/etc/hosts"); # Read file into memory
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if ($rconf)
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{
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while (<$rconf>)
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{
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push @hosts, $_;
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}
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close($rconf);
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}
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}
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if ($req->{node})
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{
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if ($MACTOLINKLOCAL)
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{
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my $mactab = xCAT::Table->new("mac");
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my $machash = $mactab->getNodesAttribs($req->{node}, ['mac']);
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foreach my $node (keys %{$machash})
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{
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my $mac = $machash->{$node}->[0]->{mac};
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if (!$mac)
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{
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next;
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}
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my $linklocal = xCAT::NetworkUtils->linklocaladdr($mac);
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my $netn;
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($domain, $netn) = &getIPdomain($linklocal, $callback);
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if (!$domain) {
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if ($::sitedomain) {
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$domain=$::sitedomain;
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} elsif ($::XCATSITEVALS{domain}) {
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$domain=$::XCATSITEVALS{domain};
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} else {
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my $rsp;
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push @{$rsp->{data}}, "No domain can be determined for node \'$node\'. The domain of the xCAT node must be provided in an xCAT network definition or the xCAT site definition.\n";
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xCAT::MsgUtils->message("W", $rsp, $callback);
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next;
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}
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}
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if ($DELNODE)
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{
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delnode $node, $linklocal, $node, $domain;
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}
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else
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{
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addnode $callback, $node, $linklocal, $node, $domain;
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}
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}
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}
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else
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{
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add_hosts_content(nodelist=>$req->{node},callback=>$callback,delnode=>$DELNODE,domain=>$domain);
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} # end else
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# do the other node nics - if any
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&donics(nodes=>$req->{node}, callback=>$callback, delnode=>$DELNODE);
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}
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else
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{
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if ($DELNODE)
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{
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return;
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}
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my @hostents =
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$hoststab->getAllNodeAttribs(
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['ip', 'node', 'hostnames', 'otherinterfaces']);
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my @allnodes;
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foreach (@hostents)
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{
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push @allnodes, $_->{node};
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my $netn;
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($domain, $netn) = &getIPdomain($_->{ip});
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if (!$domain) {
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$domain=$::sitedomain;
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}
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if (!$domain) {
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$domain=$::XCATSITEVALS{domain};
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}
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if (xCAT::NetworkUtils->isIpaddr($_->{ip}))
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{
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addnode $callback, $_->{node}, $_->{ip}, $_->{hostnames}, $domain;
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}
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else
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{
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my $rsp;
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push @{$rsp->{data}}, "Invalid IP Addr \'$_->{ip}\' for node \'$_->{node}\'.";
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xCAT::MsgUtils->message("E", $rsp, $callback);
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}
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if (defined($_->{otherinterfaces}))
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{
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addotherinterfaces $callback, $_->{node}, $_->{otherinterfaces}, $domain;
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}
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}
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# also do nics table
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&donics(nodes=>\@allnodes, callback=>$callback, delnode=>$DELNODE);
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}
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writeout();
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if ($lockh)
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{
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flock($lockh, LOCK_UN);
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}
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}
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sub writeout
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{
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my $targ;
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open($targ, '>', "/etc/hosts");
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foreach (@hosts)
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{
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print $targ $_;
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}
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close($targ);
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}
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#-------------------------------------------------------------------------------
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=head3 donics
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Add the additional network interfaces for a list of nodes as
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indicated in the nics table
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Arguments:
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node name
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Returns:
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0 - ok
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1 - error
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Globals:
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Example:
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my $rc = &donics(nodes=>\@allnodes, callback=>$callback, delnode=>$DELNODE);
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Comments:
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none
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=cut
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#-------------------------------------------------------------------------------
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sub donics
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{
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my %args = @_;
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my $nodes = $args{nodes};
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my $callback = $args{callback};
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my $delnode = $args{delnode};
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my @nodelist = @{$nodes};
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my $nicstab = xCAT::Table->new('nics');
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my $nettab = xCAT::Table->new('networks');
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foreach my $node (@nodelist)
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{
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my $nich;
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my %nicindex;
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# get the nic info
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my $et =
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$nicstab->getNodeAttribs(
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$node,
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[
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'nicips', 'nichostnamesuffixes',
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'nicnetworks', 'nicaliases'
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]
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);
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# only require IP for nic
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if ( !($et->{nicips}) ) {
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next;
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}
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# gather nics info
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# delimiter could be ":" or "!"
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# new $et->{nicips} looks like
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# "eth0!11.10.1.1,eth1!60.0.0.5|60.0.0.250..."
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my @nicandiplist = split(',', $et->{'nicips'});
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foreach (@nicandiplist)
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{
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my ($nicname, $nicip);
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# if it contains a "!" then split on "!"
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if ($_ =~ /!/) {
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($nicname, $nicip) = split('!', $_);
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} else {
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($nicname, $nicip) = split(':', $_);
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}
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$nicindex{$nicname}=0;
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if (!$nicip) {
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next;
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}
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if ( $nicip =~ /\|/) {
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my @ips = split( /\|/, $nicip);
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foreach my $ip (@ips) {
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$nich->{$nicname}->{nicip}->[$nicindex{$nicname}] = $ip;
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$nicindex{$nicname}++;
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}
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} else {
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$nich->{$nicname}->{nicip}->[$nicindex{$nicname}] = $nicip;
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$nicindex{$nicname}++;
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}
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}
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my @nicandsufx = split(',', $et->{'nichostnamesuffixes'});
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foreach (@nicandsufx)
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{
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my ($nicname, $nicsufx);
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if ($_ =~ /!/) {
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($nicname, $nicsufx) = split('!', $_);
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} else {
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($nicname, $nicsufx) = split(':', $_);
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}
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if ( $nicsufx =~ /\|/) {
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my @sufs = split( /\|/, $nicsufx);
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my $index=0;
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foreach my $suf (@sufs) {
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$nich->{$nicname}->{nicsufx}->[$index] = $suf;
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$index++;
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}
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} else {
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$nich->{$nicname}->{nicsufx}->[0] = $nicsufx;
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}
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}
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# see if we need to fill in a default suffix
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# nich has all the valid nics - ie. that have IPs provided!
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foreach my $nic (keys %{$nich}) {
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for (my $i = 0; $i < $nicindex{$nic}; $i++ ){
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if (!$nich->{$nic}->{nicsufx}->[$i]) {
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# then we have no suffix at all for this
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# so set a default
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$nich->{$nic}->{nicsufx}->[$i] = "-$nic";
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}
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}
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}
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my @nicandnetwrk = split(',', $et->{'nicnetworks'});
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foreach (@nicandnetwrk)
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{
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my ($nicname, $netwrk);
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if ($_ =~ /!/) {
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($nicname, $netwrk) = split('!', $_);
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} else {
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($nicname, $netwrk) = split(':', $_);
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}
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if (!$netwrk) {
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next;
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}
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if ( $netwrk =~ /\|/) {
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my @nets = split( /\|/, $netwrk);
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my $index=0;
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foreach my $net (@nets) {
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$nich->{$nicname}->{netwrk}->[$index] = $net;
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$index++;
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}
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} else {
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$nich->{$nicname}->{netwrk}->[0] = $netwrk;
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}
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}
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my @nicandnicalias = split(',', $et->{'nicaliases'});
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foreach (@nicandnicalias)
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{
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my ($nicname, $aliases);
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if ($_ =~ /!/) {
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($nicname, $aliases) = split('!', $_);
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} else {
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($nicname, $aliases) = split(':', $_);
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}
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if (!$aliases) {
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next;
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}
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if ( $aliases =~ /\|/) {
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my @names = split( /\|/, $aliases);
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my $index=0;
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foreach my $alias (@names) {
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$nich->{$nicname}->{nicaliases}->[$index] = $alias;
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$index++;
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}
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} else {
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$nich->{$nicname}->{nicaliases}->[0] = $aliases;
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}
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}
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# end gather nics info
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# add or delete nic entries in the hosts file
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foreach my $nic (keys %{$nich}) {
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# make sure we have the short hostname
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my $shorthost;
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($shorthost = $node) =~ s/\..*$//;
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for (my $i = 0; $i < $nicindex{$nic}; $i++ ){
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my $nicip = $nich->{$nic}->{nicip}->[$i];
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my $nicsuffix = $nich->{$nic}->{nicsufx}->[$i];
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my $nicnetworks = $nich->{$nic}->{netwrk}->[$i];
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my $nicaliases = $nich->{$nic}->{nicaliases}->[$i];
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if (!$nicip) {
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next;
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}
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# construct hostname for nic
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my $nichostname = "$shorthost$nicsuffix";
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# get domain from network def provided by nic attr
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my $nt = $nettab->getAttribs({ netname => "$nicnetworks"}, 'domain');
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# look up the domain as a check or if it's not provided
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my ($ndomain, $netn) = &getIPdomain($nicip, $callback);
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if ( $nt->{domain} && $ndomain ) {
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# if they don't match we may have a problem.
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if($nicnetworks ne $netn) {
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my $rsp;
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push @{$rsp->{data}}, "The xCAT network name listed for
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\'$nichostname\' is \'$nicnetworks\' however the nic IP address \'$nicip\' seems to be in the \'$netn\' network.\nIf there is an error then makes corrections to the database definitions and re-run this command.\n";
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xCAT::MsgUtils->message("W", $rsp, $callback);
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}
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}
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# choose a domain
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my $nicdomain;
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if ( $ndomain ) {
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# use the one based on the ip address
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$nicdomain=$ndomain;
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} elsif ( $nt->{domain} ) {
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# then try the one provided in the nics entry
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$nicdomain=$nt->{domain};
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} elsif ( $::sitedomain) {
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# try the site domain for backward compatibility
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$nicdomain=$::sitedomain;
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} elsif ($::XCATSITEVALS{domain}) {
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$nicdomain=$::XCATSITEVALS{domain};
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} else {
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my $rsp;
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push @{$rsp->{data}}, "No domain can be determined for the NIC IP value of \'$nicip\'. The network domains must be provided in an xCAT network definition or the xCAT site definition.\n";
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xCAT::MsgUtils->message("W", $rsp, $callback);
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next;
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}
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if ($delnode)
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{
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delnode $nichostname, $nicip, '', $nicdomain;
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}
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else
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{
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addnode $callback, $nichostname, $nicip, $nicaliases, $nicdomain, 1;
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}
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} # end for each index
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} # end for each nic
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} # end for each node
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if ($args{hostsref}) {
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@{$args{hostsref}} = @hosts;
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}
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$nettab->close;
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$nicstab->close;
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return 0;
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}
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#-------------------------------------------------------------------------------
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=head3 getIPdomain
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Find the xCAT network definition match the IP and then return the
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domain value from that network def.
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Arguments:
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node IP
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callback
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Returns:
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domain and netname - ok
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undef - error
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Globals:
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Example:
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my $rc = &getIPdomain($nodeIP, $callback);
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Comments:
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none
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=cut
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#-------------------------------------------------------------------------------
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sub getIPdomain
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{
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my $nodeIP = shift;
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my $callback = shift;
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# get the network defs
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my $nettab = xCAT::Table->new('networks');
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my @nets = $nettab->getAllAttribs('netname', 'net', 'mask', 'domain');
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# foreach network def
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foreach my $enet (@nets)
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{
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my $NM = $enet->{'mask'};
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my $net = $enet->{'net'};
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if (xCAT::NetworkUtils->ishostinsubnet($nodeIP, $NM, $net))
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{
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return ($enet->{'domain'}, $enet->{'netname'});
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last;
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}
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}
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# could not find the network domain for this IP address
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return undef;
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}
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1;
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