2c7887ec24
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@1521 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
740 lines
22 KiB
Perl
740 lines
22 KiB
Perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT_plugin::dhcp;
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use xCAT::Table;
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use Data::Dumper;
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use MIME::Base64;
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use Getopt::Long;
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Getopt::Long::Configure("bundling");
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Getopt::Long::Configure("pass_through");
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use Socket;
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use Sys::Syslog;
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use IPC::Open2;
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use xCAT::Utils;
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my @dhcpconf; #Hold DHCP config file contents to be written back.
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my @nrn; # To hold output of netstat -rn to be consulted throughout process
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my $domain;
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my $omshell;
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my $statements; #Hold custom statements to be slipped into host declarations
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my $callback;
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my $restartdhcp;
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sub handled_commands
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{
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return {makedhcp => "dhcp",};
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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 $inetn = inet_aton($node);
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my $mactab = xCAT::Table->new('mac');
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if ($mactab) { $ent = $mactab->getNodeAttribs($node, [qw(mac)]); }
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if ($ent and $ent->{mac})
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{
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my @macs = split(/\|/, $ent->{mac});
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my $mace;
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foreach $mace (@macs)
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{
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my $mac;
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my $hname;
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($mac, $hname) = split(/!/, $mace);
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unless ($hname) { $hname = $node; }
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print $omshell "new host\n";
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print $omshell
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"set name = \"$hname\"\n"; #Find and destroy conflict name
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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if ($mac)
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{
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print $omshell "new host\n";
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print $omshell "set hardware-address = " . $mac
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. "\n"; #find and destroy mac conflict
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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}
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if ($inetn)
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{
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my $ip;
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if (inet_aton($hname))
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{
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$ip = inet_ntoa(inet_aton($hname));
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}
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if ($ip)
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{
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print $omshell "new host\n";
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print $omshell
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"set ip-address = $ip\n"; #find and destroy ip conflict
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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}
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}
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}
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}
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print $omshell "new host\n";
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print $omshell "set name = \"$node\"\n"; #Find and destroy conflict name
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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if ($inetn)
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{
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my $ip = inet_ntoa(inet_aton($node));
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unless ($ip) { return; }
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print $omshell "new host\n";
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print $omshell "set ip-address = $ip\n"; #find and destroy ip conflict
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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}
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}
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sub addnode
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{
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#Use omshell to add the node.
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#the process used is blind typing commands that should work
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#it tries to delet any conflicting entries matched by name and
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#hardware address and ip address before creating a brand now one
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#unfortunate side effect: dhcpd.leases can look ugly over time, when
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#doing updates would keep it cleaner, good news, dhcpd restart cleans
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#up the lease file the way we would want anyway.
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my $node = shift;
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my $ent;
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my $nrtab = xCAT::Table->new('noderes');
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my $lstatements = $statements;
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my $guess_next_server = 0;
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if ($nrtab)
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{
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my $ent;
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$ent = $nrtab->getNodeAttribs($node, ['tftpserver']);
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if ($ent and $ent->{tftpserver})
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{
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$lstatements =
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'next-server '
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. inet_ntoa(inet_aton($ent->{tftpserver})) . ';'
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. $statements;
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}
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else
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{
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$guess_next_server = 1;
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}
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#else {
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# $ent = $nrtab->getNodeAttribs($node,['servicenode']);
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# if ($ent and $ent->{servicenode}) {
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# $statements = 'next-server = \"'.inet_ntoa(inet_aton($ent->{servicenode})).'\";'.$statements;
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# }
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#}
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}
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else
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{
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$guess_next_server = 1;
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}
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my $mactab = xCAT::Table->new('mac');
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unless ($mactab)
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{
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$callback->(
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{
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error => ["Unable to open mac table, it may not exist yet"],
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errorcode => [1]
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}
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);
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return;
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}
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$ent = $mactab->getNodeAttribs($node, [qw(mac)]);
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unless ($ent and $ent->{mac})
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{
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$callback->(
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{
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error => ["Unable to find mac address for $node"],
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errorcode => [1]
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}
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);
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return;
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}
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my @macs = split(/\|/, $ent->{mac});
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my $mace;
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foreach $mace (@macs)
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{
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my $mac;
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my $hname;
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$hname = "";
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($mac, $hname) = split(/!/, $mace);
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unless ($hname)
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{
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$hname = $node;
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} #Default to hostname equal to nodename
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unless ($mac) { next; } #Skip corrupt format
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my $inetn;
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$inetn = "";
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if ($hname eq '*NOIP*')
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{
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$inetn = "DENIED";
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$hname = $node . "-noip" . $mac;
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$hname =~ s/://g;
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}
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else
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{
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$inetn = inet_aton($hname);
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}
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unless ($inetn)
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{
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syslog(
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"local1|err",
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"xCAT DHCP plugin unable to resolve IP for $hname (for $node)"
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);
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return;
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}
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my $ip;
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$ip = "";
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if ($inetn eq "DENIED")
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{
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$ip = "DENIED";
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}
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else
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{
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$ip = inet_ntoa(inet_aton($hname));
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}
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if ($guess_next_server and $ip ne "DENIED")
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{
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my $nxtsrv = xCAT::Utils->my_ip_facing($hname);
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if ($nxtsrv)
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{
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$lstatements = "next-server $nxtsrv;$statements";
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}
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}
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#syslog("local4|err", "Setting $node ($hname|$ip) to " . $mac);
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print $omshell "new host\n";
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print $omshell
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"set name = \"$hname\"\n"; #Find and destroy conflict name
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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print $omshell "new host\n";
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print $omshell "set ip-address = $ip\n"; #find and destroy ip conflict
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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print $omshell "new host\n";
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print $omshell "set hardware-address = " . $mac
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. "\n"; #find and destroy mac conflict
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print $omshell "open\n";
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print $omshell "remove\n";
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print $omshell "close\n";
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print $omshell "new host\n";
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print $omshell "set name = \"$hname\"\n";
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print $omshell "set hardware-address = " . $mac . "\n";
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print $omshell "set hardware-type = 1\n";
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if ($ip eq "DENIED")
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{ #Blacklist this mac to preclude confusion, give best shot at things working
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print $omshell "set statements = \"deny booting;\"\n";
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}
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else
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{
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print $omshell "set ip-address = $ip\n";
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if ($lstatements)
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{
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$lstatements = 'send host-name \"'.$node.'\";'.$lstatements;
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} else {
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$lstatements = 'send host-name \"'.$node.'\";';
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}
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print $omshell "set statements = \"$lstatements\"\n";
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}
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print $omshell "create\n";
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print $omshell "close\n";
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unless (grep /#definition for host $node aka host $hname/, @dhcpconf)
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{
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push @dhcpconf,
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"#definition for host $node aka host $hname can be found in the dhcpd.leases file\n";
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}
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}
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}
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sub preprocess_request
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{
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my $req = shift;
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$callback = shift;
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if ($req->{_xcatdest})
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{
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return [$req];
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} #Exit if the packet has been preprocessed in its history
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my @requests =
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({%$req}); #Start with a straight copy to reflect local instance
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my @sn = xCAT::Utils->getSNList(dhcpserver);
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foreach my $s (@sn)
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{
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my $reqcopy = {%$req};
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$reqcopy->{'_xcatdest'} = $s;
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push @requests, $reqcopy;
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}
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if (scalar(@requests) > 1)
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{ #hierarchy detected, enforce more rigorous sanity
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my $ntab = xCAT::Table->new('networks');
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if ($ntab)
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{
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foreach (@{$ntab->getAllEntries()})
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{
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if ($_->{dynamicrange} and not $_->{dhcpserver})
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{
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$callback->({error=>["Hierarchy requested, therefore networks.dhcpserver must be set for net=".$_->{net}.""],errorcode=>[1]});
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return [];
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}
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}
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}
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}
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return \@requests;
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}
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sub process_request
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{
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$restartdhcp=0;
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my $req = shift;
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$callback = shift;
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my $sitetab = xCAT::Table->new('site');
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my %activenics;
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my $querynics = 1;
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if ($sitetab)
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{
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my $href;
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($href) = $sitetab->getAttribs({key => 'dhcpinterfaces'}, 'value');
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unless ($href and $href->{value})
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{ #LEGACY: singular keyname for old style site value
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($href) = $sitetab->getAttribs({key => 'dhcpinterface'}, 'value');
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}
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if ($href and $href->{value})
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#syntax should be like host|ifname1,ifname2;host2|ifname3,ifname2 etc or simply ifname,ifname2
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#depending on complexity of network wished to be described
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{
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my $dhcpinterfaces = $href->{value};
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my $dhcpif;
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foreach $dhcpif (split /;/,$dhcpinterfaces) {
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if ($dhcpif =~ /\|/) {
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(my $host,$dhcpif) = split /\|/,$dhcpif;
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if (xCAT::Utils->thishostisnot($host)) {
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next;
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}
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}
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foreach (split /[,\s]+/, $dhcpif)
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{
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$activenics{$_} = 1;
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$querynics = 0;
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}
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}
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}
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($href) = $sitetab->getAttribs({key => 'domain'}, 'value');
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unless ($href and $href->{value})
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{
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$callback->(
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{error => ["No domain defined in site tabe"], errorcode => [1]}
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);
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return;
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}
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$domain = $href->{value};
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}
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@dhcpconf = ();
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unless ($req->{arg} or $req->{node})
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{
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$callback->({data => ["Usage: makedhcp <-n> <noderange>"]});
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return;
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}
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if (grep /^-n$/, @{$req->{arg}})
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{
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if (-e "/etc/dhcpd.conf")
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{
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my $bakname = "/etc/dhcpd.conf.xcatbak";
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rename("/etc/dhcpd.conf", $bakname);
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}
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}
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else
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{
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open($rconf, "/etc/dhcpd.conf"); # 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 @dhcpconf, $_;
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}
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close($rconf);
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}
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unless ($dhcpconf[0] =~ /^#xCAT/)
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{ #Discard file if not xCAT originated, like 1.x did
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$restartdhcp=1;
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@dhcpconf = ();
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}
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}
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@nrn = split /\n/, `/bin/netstat -rn`;
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splice @nrn, 0, 2; #get rid of header
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if ($querynics)
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{ #Use netstat to determine activenics only when no site ent.
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foreach (@nrn)
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{
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my @ent = split /\s+/;
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if ($ent[0] eq "169.254.0.0")
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{
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next;
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}
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if ($ent[7] =~ m/(ipoib|ib|vlan|bond|eth|myri|man|wlan)/)
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{ #Mask out many types of interfaces, like xCAT 1.x
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$activenics{$ent[7]} = 1;
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}
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}
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}
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unless ($dhcpconf[0])
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{ #populate an empty config with some starter data...
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$restartdhcp=1;
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newconfig();
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}
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foreach (keys %activenics)
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{
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addnic($_);
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}
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if (grep /^-a$/, @{$req->{arg}})
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{
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if (grep /-d$/, @{$req->{arg}})
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{
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$req->{node} = [];
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my $nodelist = xCAT::Table->new('nodelist');
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my @entries = ($nodelist->getAllNodeAttribs([qw(node)]));
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foreach (@entries)
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{
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push @{$req->{node}}, $_->{node};
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}
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}
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else
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{
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$req->{node} = [];
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my $mactab = xCAT::Table->new('mac');
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my @entries = ($mactab->getAllNodeAttribs([qw(mac)]));
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foreach (@entries)
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{
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push @{$req->{node}}, $_->{node};
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}
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}
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}
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if ($req->{node})
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{
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@ARGV = @{$req->{arg}};
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$statements = "";
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GetOptions('s|statements=s' => \$statements);
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my $passtab = xCAT::Table->new('passwd');
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my $ent;
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($ent) = $passtab->getAttribs({key => "omapi"}, qw(username password));
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unless ($ent->{username} and $ent->{password})
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{
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return;
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} # TODO sane err
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#Have nodes to update
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#open2($omshellout,$omshell,"/usr/bin/omshell");
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open($omshell, "|/usr/bin/omshell > /dev/null");
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print $omshell "key "
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. $ent->{username} . " \""
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. $ent->{password} . "\"\n";
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print $omshell "connect\n";
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foreach (@{$req->{node}})
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{
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if (grep /^-d$/, @{$req->{arg}})
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{
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delnode $_;
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}
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else
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{
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unless (xCAT::Utils->nodeonmynet($_))
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{
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next;
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}
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addnode $_;
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}
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}
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close($omshell);
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}
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foreach (@nrn)
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{
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my @line = split /\s+/;
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if ($ent[0] eq "169.254.0.0")
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{
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next;
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}
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if ($activenics{$line[7]} and $line[3] !~ /G/)
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{
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addnet($line[0], $line[2]);
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}
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}
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writeout();
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if ($restartdhcp) {
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system("/etc/init.d/dhcpd restart");
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system("chkconfig dhcpd on");
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}
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}
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sub addnet
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{
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my $net = shift;
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my $mask = shift;
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my $nic;
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if ($net eq "169.254.0.0") {
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return;
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}
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unless (grep /\} # $net\/$mask subnet_end/, @dhcpconf)
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{
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$restartdhcp=1;
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foreach (@nrn)
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{ # search for relevant NIC
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my @ent = split /\s+/;
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if ($ent[0] eq "169.254.0.0")
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{
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next;
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}
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if ($ent[0] eq $net and $ent[2] eq $mask)
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{
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$nic = $ent[7];
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}
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}
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#print " add $net $mask under $nic\n";
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my $idx = 0;
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while ($idx <= $#dhcpconf)
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{
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if ($dhcpconf[$idx] =~ /\} # $nic nic_end\n/)
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{
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last;
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}
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$idx++;
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}
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unless ($dhcpconf[$idx] =~ /\} # $nic nic_end\n/)
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{
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return 1; #TODO: this is an error condition
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}
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# if here, means we found the idx before which to insert
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my $nettab = xCAT::Table->new("networks");
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my $nameservers;
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my $gateway;
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my $tftp;
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my $range;
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my $myip;
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$myip = xCAT::Utils->my_ip_facing($net);
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if ($nettab)
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{
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my ($ent) =
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$nettab->getAttribs({net => $net, mask => $mask},
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qw(tftpserver nameservers gateway dynamicrange dhcpserver));
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if ($ent and $ent->{nameservers})
|
|
{
|
|
$nameservers = $ent->{nameservers};
|
|
}
|
|
else
|
|
{
|
|
$callback->(
|
|
{
|
|
warning => [
|
|
"No $net specific entry for nameservers, and dhcp plugin not sourcing from site yet (TODO)"
|
|
]
|
|
}
|
|
);
|
|
}
|
|
if ($ent and $ent->{tftpserver})
|
|
{
|
|
$tftp = $ent->{tftpserver};
|
|
}
|
|
else
|
|
{ #presume myself to be it, dhcp no longer does this for us
|
|
$tftp = $myip;
|
|
}
|
|
if ($ent and $ent->{gateway})
|
|
{
|
|
$gateway = $ent->{gateway};
|
|
}
|
|
if ($ent and $ent->{dynamicrange})
|
|
{
|
|
unless ($ent->{dhcpserver}
|
|
and xCAT::Utils->thishostisnot($ent->{dhcpserver}))
|
|
{ #If specific, only one dhcp server gets a dynamic range
|
|
$range = $ent->{dynamicrange};
|
|
$range =~ s/[,-]/ /g;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$callback->(
|
|
{
|
|
warning => [
|
|
"No dynamic range specified for $net, unknown systems on this network will not receive an address"
|
|
]
|
|
}
|
|
);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$callback->(
|
|
{
|
|
error =>
|
|
["Unable to open networks table, please run makenetworks"],
|
|
errorcode => [1]
|
|
}
|
|
);
|
|
return 1;
|
|
}
|
|
|
|
my @netent;
|
|
my $maskn = unpack("N", inet_aton($mask));
|
|
my $netn = unpack("N", inet_aton($net));
|
|
@netent = (
|
|
" subnet $net netmask $mask {\n",
|
|
" max-lease-time 43200;\n",
|
|
" min-lease-time 43200;\n",
|
|
" default-lease-time 43200;\n"
|
|
);
|
|
if ($gateway)
|
|
{
|
|
my $gaten = unpack("N", inet_aton($gateway));
|
|
if (($gaten & $maskn) == ($maskn & $netn))
|
|
{
|
|
push @netent, " option routers $gateway;\n";
|
|
}
|
|
else
|
|
{
|
|
$callback->(
|
|
{
|
|
error => [
|
|
"Specified gateway $gateway is not valid for $net/$mask, must be on same network"
|
|
],
|
|
errorcode => [1]
|
|
}
|
|
);
|
|
}
|
|
}
|
|
if ($tftp)
|
|
{
|
|
push @netent, " next-server $tftp;\n";
|
|
}
|
|
push @netent, " option log-servers $myip;\n";
|
|
push @netent, " option ntp-servers $myip;\n";
|
|
push @netent, " option domain-name \"$domain\";\n";
|
|
if ($nameservers)
|
|
{
|
|
push @netent, " option domain-name-servers $nameservers;\n";
|
|
}
|
|
push @netent, " if option client-architecture = 00:00 { #x86\n";
|
|
push @netent, " filename \"pxelinux.0\";\n";
|
|
push @netent,
|
|
" } else if option client-architecture = 00:02 { #ia64\n ";
|
|
push @netent, " filename \"elilo.efi\";\n";
|
|
push @netent,
|
|
" } else if substring(filename,0,1) = null { #otherwise, provide yaboot if the client isn't specific\n ";
|
|
push @netent, " filename \"/yaboot\";\n";
|
|
push @netent, " }\n";
|
|
if ($range) { push @netent, " range dynamic-bootp $range;\n" }
|
|
push @netent, " } # $net\/$mask subnet_end\n";
|
|
splice(@dhcpconf, $idx, 0, @netent);
|
|
}
|
|
}
|
|
|
|
sub addnic
|
|
{
|
|
my $nic = shift;
|
|
my $firstindex = 0;
|
|
my $lastindex = 0;
|
|
unless (grep /} # $nic nic_end/, @dhcpconf)
|
|
{ #add a section if not there
|
|
$restartdhcp=1;
|
|
print "Adding NIC $nic\n";
|
|
push @dhcpconf, "shared-network $nic {\n";
|
|
push @dhcpconf, "\} # $nic nic_end\n";
|
|
}
|
|
|
|
#return; #Don't touch it, it should already be fine..
|
|
#my $idx=0;
|
|
#while ($idx <= $#dhcpconf) {
|
|
# if ($dhcpconf[$idx] =~ /^shared-network $nic {/) {
|
|
# $firstindex = $idx; # found the first place to chop...
|
|
# } elsif ($dhcpconf[$idx] =~ /} # $nic network_end/) {
|
|
# $lastindex=$idx;
|
|
# }
|
|
# $idx++;
|
|
#}
|
|
#print Dumper(\@dhcpconf);
|
|
#if ($firstindex and $lastindex) {
|
|
# splice @dhcpconf,$firstindex,($lastindex-$firstindex+1);
|
|
#}
|
|
#print Dumper(\@dhcpconf);
|
|
}
|
|
|
|
sub writeout
|
|
{
|
|
my $targ;
|
|
open($targ, '>', "/etc/dhcpd.conf");
|
|
foreach (@dhcpconf)
|
|
{
|
|
print $targ $_;
|
|
}
|
|
close($targ);
|
|
}
|
|
|
|
sub newconfig
|
|
{
|
|
|
|
# This function puts a standard header in and enough to make omapi work.
|
|
my $passtab = xCAT::Table->new('passwd', -create => 1);
|
|
push @dhcpconf, "#xCAT generated dhcp configuration\n";
|
|
push @dhcpconf, "\n";
|
|
push @dhcpconf, "authoritative;\n";
|
|
push @dhcpconf, "ddns-update-style none;\n";
|
|
push @dhcpconf,
|
|
"option client-architecture code 93 = unsigned integer 16;\n";
|
|
push @dhcpconf, "\n";
|
|
push @dhcpconf, "omapi-port 7911;\n"; #Enable omapi...
|
|
push @dhcpconf, "key xcat_key {\n";
|
|
push @dhcpconf, " algorithm hmac-md5;\n";
|
|
(my $passent) =
|
|
$passtab->getAttribs({key => omapi, username => 'xcat_key'}, 'password');
|
|
my $secret = encode_base64(genpassword(32)); #Random from set of 62^32
|
|
chomp $secret;
|
|
if ($passent->{password}) { $secret = $passent->{password}; }
|
|
else
|
|
{
|
|
$callback->(
|
|
{
|
|
data =>
|
|
["The dhcp server must be restarted for OMAPI function to work"]
|
|
}
|
|
);
|
|
$passtab->setAttribs({key => omapi},
|
|
{username => 'xcat_key', password => $secret});
|
|
}
|
|
|
|
push @dhcpconf, " secret \"" . $secret . "\";\n";
|
|
push @dhcpconf, "};\n";
|
|
push @dhcpconf, "omapi-key xcat_key;\n";
|
|
}
|
|
|
|
sub genpassword
|
|
{
|
|
|
|
#Generate a pseudo-random password of specified length
|
|
my $length = shift;
|
|
my $password = '';
|
|
my $characters =
|
|
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890';
|
|
srand; #have to reseed, rand is not rand otherwise
|
|
while (length($password) < $length)
|
|
{
|
|
$password .= substr($characters, int(rand 63), 1);
|
|
}
|
|
return $password;
|
|
}
|
|
|
|
1;
|