d6faf045ad
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@666 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
263 lines
6.9 KiB
Perl
263 lines
6.9 KiB
Perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT_plugin::pxe;
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use Data::Dumper;
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use Sys::Syslog;
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use Socket;
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use File::Copy;
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my $request;
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my $callback;
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my $dhcpconf = "/etc/dhcpd.conf";
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my $tftpdir = "/tftpboot";
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#my $dhcpver = 3;
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my %usage = (
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"nodeset" => "Usage: nodeset <noderange> [install|shell|boot|runcmd=bmcsetup]",
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);
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sub handled_commands {
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return {
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nodeset => "noderes:netboot"
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}
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}
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sub check_dhcp {
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#TODO: omapi magic to do things right
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my $node = shift;
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my $dhcpfile;
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open ($dhcpfile,$dhcpconf);
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while (<$dhcpfile>) {
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if (/host $node\b/) {
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close $dhcpfile;
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return 1;
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}
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}
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close $dhcpfile;
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return 0;
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}
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sub getstate {
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my $node = shift;
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if (check_dhcp($node)) {
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if (-r $tftpdir . "/pxelinux.cfg/".$node) {
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my $fhand;
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open ($fhand,$tftpdir . "/pxelinux.cfg/".$node);
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my $headline = <$fhand>;
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close $fhand;
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$headline =~ s/^#//;
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chomp($headline);
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return $headline;
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} else {
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return "boot";
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}
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} else {
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return "discover";
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}
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}
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sub setstate {
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=pod
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This function will manipulate the pxelinux.cfg structure to match what the noderes/chain tables indicate the node should be booting.
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=cut
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my $node = shift;
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my $restab = xCAT::Table->new('noderes');
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my $kern = $restab->getNodeAttribs($node,['kernel','initrd','kcmdline']);
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my $pcfg;
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open($pcfg,'>',$tftpdir."/pxelinux.cfg/".$node);
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my $chaintab = xCAT::Table->new('chain');
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my $cref=$chaintab->getNodeAttribs($node,['currstate']);
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if ($cref->{currstate}) {
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print $pcfg "#".$cref->{currstate}."\n";
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}
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print $pcfg "DEFAULT xCAT\n";
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print $pcfg "LABEL xCAT\n";
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$chaintab = xCAT::Table->new('chain');
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my $stref = $chaintab->getNodeAttribs($node,['currstate']);
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if ($stref and $stref->{currstate} eq "boot") {
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print $pcfg "LOCALBOOT 0\n";
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close($pcfg);
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} elsif ($kern and $kern->{kernel}) {
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#It's time to set pxelinux for this node to boot the kernel..
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print $pcfg " KERNEL ".$kern->{kernel}."\n";
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if ($kern->{initrd} or $kern->{kcmdline}) {
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print $pcfg " APPEND ";
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}
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if ($kern and $kern->{initrd}) {
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print $pcfg "initrd=".$kern->{initrd}." ";
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}
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if ($kern and $kern->{kcmdline}) {
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print $pcfg $kern->{kcmdline}."\n";
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} else {
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print $pcfg "\n";
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}
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close($pcfg);
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my $inetn = inet_aton($node);
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unless ($inetn) {
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syslog("local1|err","xCAT unable to resolve IP for $node in pxe plugin");
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return;
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}
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} else { #TODO: actually, should possibly default to xCAT image?
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print $pcfg "LOCALBOOT 0\n";
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close($pcfg);
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}
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my $mactab = xCAT::Table->new('mac'); #to get all the hostnames
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my %ipaddrs;
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my $ip = inet_ntoa(inet_aton($node));;
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unless ($ip) {
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syslog("local1|err","xCAT unable to resolve IP in pxe plugin");
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return;
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}
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$ipaddrs{$ip} = 1;
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if ($mactab) {
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my $ment = $mactab->getNodeAttribs($node,['mac']);
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if ($ment and $ment->{mac}) {
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my @macs = split(/\|/,$ment->{mac});
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foreach (@macs) {
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if (/!(.*)/) {
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$ipaddrs{inet_ntoa(inet_aton($1))} = 1;
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}
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}
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}
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}
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foreach $ip (keys %ipaddrs) {
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my @ipa=split(/\./,$ip);
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my $pname = sprintf("%02X%02X%02X%02X",@ipa);
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unlink($tftpdir."/pxelinux.cfg/".$pname);
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link($tftpdir."/pxelinux.cfg/".$node,$tftpdir."/pxelinux.cfg/".$pname);
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}
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}
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my $errored = 0;
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sub pass_along {
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my $resp = shift;
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$callback->($resp);
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if ($resp and $resp->{errorcode} and $resp->{errorcode}->[0]) {
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$errored=1;
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}
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}
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sub preprocess_request {
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my $req = shift;
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$callback = shift;
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if ($req->{_xcatdest}) { return [$req]; } #Exit if the packet has been preprocessed in its history
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my @requests = ({%$req}); #Start with a straight copy to reflect local instance
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my $sitetab = xCAT::Table->new('site');
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(my $ent) = $sitetab->getAttribs({key=>'xcatservers'},'value');
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$sitetab->close;
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if ($ent and $ent->{value}) {
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foreach (split /,/,$ent->{value}) {
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if (xCAT::Utils->thishostisnot($_)) {
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my $reqcopy = {%$req};
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$reqcopy->{'_xcatdest'} = $_;
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push @requests,$reqcopy;
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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 preprocess_request {
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# my $req = shift;
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# my $callback = shift;
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# my %localnodehash;
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# my %dispatchhash;
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# my $nrtab = xCAT::Table->new('noderes');
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# foreach my $node (@{$req->{node}}) {
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# my $nodeserver;
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# my $tent = $nrtab->getNodeAttribs($node,['tftpserver']);
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# if ($tent) { $nodeserver = $tent->{tftpserver} }
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# unless ($tent and $tent->{tftpserver}) {
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# $tent = $nrtab->getNodeAttribs($node,['servicenode']);
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# if ($tent) { $nodeserver = $tent->{servicenode} }
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# }
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# if ($nodeserver) {
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# $dispatchhash{$nodeserver}->{$node} = 1;
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# } else {
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# $localnodehash{$node} = 1;
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# }
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# }
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# my @requests;
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# my $reqc = {%$req};
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# $reqc->{node} = [ keys %localnodehash ];
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# if (scalar(@{$reqc->{node}})) { push @requests,$reqc }
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#
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# foreach my $dtarg (keys %dispatchhash) { #iterate dispatch targets
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# my $reqcopy = {%$req}; #deep copy
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# $reqcopy->{'_xcatdest'} = $dtarg;
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# $reqcopy->{node} = [ keys %{$dispatchhash{$dtarg}}];
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# push @requests,$reqcopy;
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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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$request = shift;
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$callback = shift;
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my $sub_req = shift;
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my @args;
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my @nodes;
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my @rnodes;
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if (ref($request->{node})) {
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@rnodes = @{$request->{node}};
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} else {
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if ($request->{node}) { @rnodes = ($request->{node}); }
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}
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unless (@rnodes) {
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if ($usage{$request->{command}->[0]}) {
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$callback->({data=>$usage{$request->{command}->[0]}});
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}
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return;
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}
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@nodes = ();
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foreach (@rnodes) {
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if (xCAT::Utils->nodeonmynet($_)) {
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push @nodes,$_;
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}
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}
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if (! -r "$tftpdir/pxelinux.0") {
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unless (-r "/usr/lib/syslinux/pxelinux.0") {
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$callback->({error=>["Unable to find pxelinux.0 "],errorcode=>[1]});
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return;
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}
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copy("/usr/lib/syslinux/pxelinux.0","$tftpdir/pxelinux.0");
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chmod(0644,"$tftpdir/pxelinux.0");
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}
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unless ( -r "$tftpdir/pxelinux.0" ) {
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$callback->({errror=>["Unable to find pxelinux.0 from syslinux"],errorcode=>[1]});
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return;
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}
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if (ref($request->{arg})) {
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@args=@{$request->{arg}};
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} else {
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@args=($request->{arg});
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}
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unless ($args[0] eq 'stat' or $args[0] eq 'enact') {
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$sub_req->({command=>['setdestiny'],
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node=>\@nodes,
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arg=>[$args[0]]},\&pass_along);
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}
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if ($errored) { return; }
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foreach (@nodes) {
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my %response;
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$response{node}->[0]->{name}->[0]=$_;
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if ($args[0] eq 'stat') {
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$response{node}->[0]->{data}->[0]= getstate($_);
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$callback->(\%response);
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} elsif ($args[0] eq 'enact') {
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setstate($_);
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} elsif ($args[0]) { #If anything else, send it on to the destiny plugin, then setstate
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setstate($_);
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}
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}
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}
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1;
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