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xcat-core/xCAT-server/lib/xcat/plugins/pxe.pm
jbjohnso 5ce8217cd6 -Accept more paths to memdisk 
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@4037 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
2009-08-24 18:26:43 +00:00

534 lines
16 KiB
Perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
package xCAT_plugin::pxe;
use Sys::Syslog;
use Socket;
use File::Copy;
use File::Path;
use Getopt::Long;
my $addkcmdlinehandled;
my $request;
my $callback;
my $dhcpconf = "/etc/dhcpd.conf";
my $tftpdir = "/tftpboot";
#my $dhcpver = 3;
my %usage = (
"nodeset" => "Usage: nodeset <noderange> [install|shell|boot|runcmd=bmcsetup|netboot|iscsiboot]",
);
sub handled_commands {
return {
nodeset => "noderes:netboot"
}
}
sub check_dhcp {
return 1;
#TODO: omapi magic to do things right
my $node = shift;
my $dhcpfile;
open ($dhcpfile,$dhcpconf);
while (<$dhcpfile>) {
if (/host $node\b/) {
close $dhcpfile;
return 1;
}
}
close $dhcpfile;
return 0;
}
sub getstate {
my $node = shift;
if (check_dhcp($node)) {
if (-r $tftpdir . "/xcat/xnba/nodes/".$node) {
my $fhand;
open ($fhand,$tftpdir . "/xcat/xnba/nodes/".$node);
my $headline = <$fhand>;
$headline = <$fhand>; #second line is the comment now...
close $fhand;
$headline =~ s/^#//;
chomp($headline);
return $headline;
} elsif (-r $tftpdir . "/pxelinux.cfg/".$node) {
my $fhand;
open ($fhand,$tftpdir . "/pxelinux.cfg/".$node);
my $headline = <$fhand>;
close $fhand;
$headline =~ s/^#//;
chomp($headline);
return $headline;
} else {
return "boot";
}
} else {
return "discover";
}
}
sub setstate {
=pod
This function will manipulate the pxelinux.cfg structure to match what the noderes/chain tables indicate the node should be booting.
=cut
my $node = shift;
my %bphash = %{shift()};
my %chainhash = %{shift()};
my %machash = %{shift()};
my $kern = $bphash{$node}->[0]; #$bptab->getNodeAttribs($node,['kernel','initrd','kcmdline']);
unless ($addkcmdlinehandled->{$node}) { #Tag to let us know the plugin had a special syntax implemented for addkcmdline
if ($kern->{addkcmdline}) { #Implement the kcmdline append here for
#most generic, least code duplication
$kern->{kcmdline} .= " ".$kern->{addkcmdline};
}
}
if ($kern->{kcmdline} =~ /!myipfn!/) {
my $ipfn = xCAT::Utils->my_ip_facing($node);
unless ($ipfn) {
my @myself = xCAT::Utils->determinehostname();
my $myname = $myself[(scalar @myself)-1];
$callback->(
{
error => [
"$myname: Unable to determine or reasonably guess the image server for $node"
],
errorcode => [1]
}
);
}
$kern->{kcmdline} =~ s/!myipfn!/$ipfn/;
}
my $pcfg;
unlink($tftpdir."/xcat/xnba/nodes/".$node.".pxelinux");
open($pcfg,'>',$tftpdir."/xcat/xnba/nodes/".$node);
my $cref=$chainhash{$node}->[0]; #$chaintab->getNodeAttribs($node,['currstate']);
print $pcfg "#!gpxe\n";
if ($cref->{currstate}) {
print $pcfg "#".$cref->{currstate}."\n";
}
if ($cref and $cref->{currstate} eq "boot") {
print $pcfg "hdboot\n";
close($pcfg);
} elsif ($kern and $kern->{kernel}) {
if ($kern->{kernel} =~ /!/) { #TODO: deprecate this, do stateless Xen like stateless ESXi
my $hypervisor;
my $kernel;
($kernel,$hypervisor) = split /!/,$kern->{kernel};
print $pcfg " set 209:string xcat/xnba/nodes/$node.pxelinux\n";
print $pcfg " set 210:string http://".'${next-server}'."/tftpboot/\n";
print $pcfg " imgfetch -n pxelinux.0 http://".'${next-server}'."/tftpboot/xcat/pxelinux.0\n";
print $pcfg " imgload pxelinux.0\n";
print $pcfg " imgexec pxelinux.0\n";
close($pcfg);
open($pcfg,'>',$tftpdir."/xcat/xnba/nodes/".$node.".pxelinux");
print $pcfg "DEFAULT xCAT\nLABEL xCAT\n KERNEL mboot.c32\n";
print $pcfg " APPEND $hypervisor --- $kernel ".$kern->{kcmdline}." --- ".$kern->{initrd}."\n";
} else {
if ($kern->{kernel} =~ /\.c32\z/ or $kern->{kernel} =~ /memdisk\z/) { #gPXE comboot support seems insufficient, chain pxelinux instead
print $pcfg " set 209:string xcat/xnba/nodes/$node.pxelinux\n";
print $pcfg " set 210:string http://".'${next-server}'."/tftpboot/\n";
print $pcfg " imgfetch -n pxelinux.0 http://".'${next-server}'."/tftpboot/xcat/pxelinux.0\n";
print $pcfg " imgload pxelinux.0\n";
print $pcfg " imgexec pxelinux.0\n";
close($pcfg);
open($pcfg,'>',$tftpdir."/xcat/xnba/nodes/".$node.".pxelinux");
#It's time to set pxelinux for this node to boot the kernel..
print $pcfg "DEFAULT xCAT\nLABEL xCAT\n";
print $pcfg " KERNEL ".$kern->{kernel}."\n";
if ($kern->{initrd} or $kern->{kcmdline}) {
print $pcfg " APPEND ";
}
if ($kern and $kern->{initrd}) {
print $pcfg "initrd=".$kern->{initrd}." ";
}
if ($kern and $kern->{kcmdline}) {
print $pcfg $kern->{kcmdline}."\n";
} else {
print $pcfg "\n";
}
} else { #other than comboot/multiboot, we won't have need of pxelinux
print $pcfg "imgfetch -n kernel http://".'${next-server}/tftpboot/'.$kern->{kernel}."\n";
print $pcfg "imgload kernel\n";
if ($kern->{kcmdline}) {
print $pcfg "imgargs kernel ".$kern->{kcmdline}."\n";
}
if ($kern->{initrd}) {
print $pcfg "imgfetch http://".'${next-server}'."/tftpboot/".$kern->{initrd}."\n";
}
print $pcfg "imgexec kernel\n";
}
}
close($pcfg);
my $inetn = inet_aton($node);
unless ($inetn) {
syslog("local1|err","xCAT unable to resolve IP for $node in pxe plugin");
return;
}
} else { #TODO: actually, should possibly default to xCAT image?
print $pcfg "LOCALBOOT 0\n";
close($pcfg);
}
my $mactab = xCAT::Table->new('mac'); #to get all the hostnames
my %ipaddrs;
unless (inet_aton($node)) {
syslog("local1|err","xCAT unable to resolve IP in pxe plugin");
return;
}
my $ip = inet_ntoa(inet_aton($node));;
unless ($ip) {
syslog("local1|err","xCAT unable to resolve IP in pxe plugin");
return;
}
$ipaddrs{$ip} = 1;
if ($mactab) {
my $ment = $machash{$node}->[0]; #$mactab->getNodeAttribs($node,['mac']);
if ($ment and $ment->{mac}) {
my @macs = split(/\|/,$ment->{mac});
foreach (@macs) {
if (/!(.*)/) {
if (inet_aton($1)) {
$ipaddrs{inet_ntoa(inet_aton($1))} = 1;
}
}
}
}
}
my $hassymlink = eval { symlink("",""); 1 };
foreach $ip (keys %ipaddrs) {
my @ipa=split(/\./,$ip);
my $pname = sprintf("%02X%02X%02X%02X",@ipa);
unlink($tftpdir."/pxelinux.cfg/".$pname);
if ($hassymlink) {
symlink($node,$tftpdir."/pxelinux.cfg/".$pname);
} else {
link($tftpdir."/pxelinux.cfg/".$node,$tftpdir."/pxelinux.cfg/".$pname);
}
}
}
my $errored = 0;
sub pass_along {
my $resp = shift;
if ($resp and ($resp->{errorcode} and $resp->{errorcode}->[0]) or ($resp->{error} and $resp->{error}->[0])) {
$errored=1;
}
foreach (@{$resp->{node}}) {
if ($_->{error} or $_->{errorcode}) {
$errored=1;
}
if ($_->{_addkcmdlinehandled}) {
$addkcmdlinehandled->{$_->{name}->[0]}=1;
return; #Don't send back to client this internal hint
}
}
$callback->($resp);
}
sub preprocess_request {
my $req = shift;
if ($req->{_xcatpreprocessed}->[0] == 1) { return [$req]; }
my $callback1 = shift;
my $command = $req->{command}->[0];
my $sub_req = shift;
my @args=();
if (ref($req->{arg})) {
@args=@{$req->{arg}};
} else {
@args=($req->{arg});
}
@ARGV = @args;
#use Getopt::Long;
Getopt::Long::Configure("bundling");
Getopt::Long::Configure("pass_through");
if (!GetOptions('h|?|help' => \$HELP, 'v|version' => \$VERSION) ) {
if($usage{$command}) {
my %rsp;
$rsp{data}->[0]=$usage{$command};
$callback1->(\%rsp);
}
return;
}
if ($HELP) {
if($usage{$command}) {
my %rsp;
$rsp{data}->[0]=$usage{$command};
$callback1->(\%rsp);
}
return;
}
if ($VERSION) {
my $ver = xCAT::Utils->Version();
my %rsp;
$rsp{data}->[0]="$ver";
$callback1->(\%rsp);
return;
}
if (@ARGV==0) {
if($usage{$command}) {
my %rsp;
$rsp{data}->[0]=$usage{$command};
$callback1->(\%rsp);
}
return;
}
#Assume shared tftp directory for boring people, but for cool people, help sync up tftpdirectory contents when
#they specify no sharedtftp in site table
my $stab = xCAT::Table->new('site');
my $sent = $stab->getAttribs({key=>'sharedtftp'},'value');
if ($sent and ($sent->{value} == 0 or $sent->{value} =~ /no/i)) {
$req->{'_disparatetftp'}=[1];
if ($req->{inittime}->[0]) {
return [$req];
}
return xCAT::Scope->get_broadcast_scope($req,@_);
}
return [$req];
}
#sub preprocess_request {
# my $req = shift;
# $callback = shift;
# if ($req->{_xcatpreprocessed}->[0] == 1) { return [$req]; }
# my @requests = ({%$req}); #Start with a straight copy to reflect local instance
# my $sitetab = xCAT::Table->new('site');
# (my $ent) = $sitetab->getAttribs({key=>'xcatservers'},'value');
# $sitetab->close;
# if ($ent and $ent->{value}) {
# foreach (split /,/,$ent->{value}) {
# if (xCAT::Utils->thishostisnot($_)) {
# my $reqcopy = {%$req};
# $reqcopy->{'_xcatdest'} = $_;
# $reqcopy->{_xcatpreprocessed}->[0] = 1;
# push @requests,$reqcopy;
# }
# }
# }
# return \@requests;
#}
#sub preprocess_request {
# my $req = shift;
# my $callback = shift;
# my %localnodehash;
# my %dispatchhash;
# my $nrtab = xCAT::Table->new('noderes');
# foreach my $node (@{$req->{node}}) {
# my $nodeserver;
# my $tent = $nrtab->getNodeAttribs($node,['tftpserver']);
# if ($tent) { $nodeserver = $tent->{tftpserver} }
# unless ($tent and $tent->{tftpserver}) {
# $tent = $nrtab->getNodeAttribs($node,['servicenode']);
# if ($tent) { $nodeserver = $tent->{servicenode} }
# }
# if ($nodeserver) {
# $dispatchhash{$nodeserver}->{$node} = 1;
# } else {
# $localnodehash{$node} = 1;
# }
# }
# my @requests;
# my $reqc = {%$req};
# $reqc->{node} = [ keys %localnodehash ];
# if (scalar(@{$reqc->{node}})) { push @requests,$reqc }
#
# foreach my $dtarg (keys %dispatchhash) { #iterate dispatch targets
# my $reqcopy = {%$req}; #deep copy
# $reqcopy->{'_xcatdest'} = $dtarg;
# $reqcopy->{node} = [ keys %{$dispatchhash{$dtarg}}];
# push @requests,$reqcopy;
# }
# return \@requests;
#}
sub process_request {
$request = shift;
$callback = shift;
my $sub_req = shift;
my @args;
my @nodes;
my @rnodes;
if (ref($request->{node})) {
@rnodes = @{$request->{node}};
} else {
if ($request->{node}) { @rnodes = ($request->{node}); }
}
unless (@rnodes) {
if ($usage{$request->{command}->[0]}) {
$callback->({data=>$usage{$request->{command}->[0]}});
}
return;
}
#if not shared, then help sync up
if ($request->{'_disparatetftp'}->[0]) { #reading hint from preprocess_command
@nodes = ();
foreach (@rnodes) {
if (xCAT::Utils->nodeonmynet($_)) {
push @nodes,$_;
}
}
} else {
@nodes = @rnodes;
}
if (ref($request->{arg})) {
@args=@{$request->{arg}};
} else {
@args=($request->{arg});
}
#now run the begin part of the prescripts
unless ($args[0] eq 'stat') { # or $args[0] eq 'enact') {
$errored=0;
if ($request->{'_disparatetftp'}->[0]) { #the call is distrubuted to the service node already, so only need to handles my own children
$sub_req->({command=>['runbeginpre'],
node=>\@nodes,
arg=>[$args[0], '-l']},\&pass_along);
} else { #nodeset did not distribute to the service node, here we need to let runednpre to distribute the nodes to their masters
$sub_req->({command=>['runbeginpre'],
node=>\@rnodes,
arg=>[$args[0]]},\&pass_along);
}
if ($errored) { return; }
}
#back to normal business
if (! -r "$tftpdir/xcat/pxelinux.0") {
unless (-r $::XCATROOT."share/xcat/netboot/syslinux/pxelinux.0") {
$callback->({error=>["Unable to find pxelinux.0 at ".$::XCATROOT."share/xcat/netboot/syslinux/pxelinux.0"],errorcode=>[1]});
return;
}
copy($::XCATROOT."share/xcat/netboot/syslinux/pxelinux.0","$tftpdir/xcat/pxelinux.0");
chmod(0644,"$tftpdir/pxelinux.0");
}
unless ( -r "$tftpdir/xcat/pxelinux.0" ) {
$callback->({errror=>["Unable to find pxelinux.0 from syslinux"],errorcode=>[1]});
return;
}
$errored=0;
unless ($args[0] eq 'stat') { # or $args[0] eq 'enact') {
$sub_req->({command=>['setdestiny'],
node=>\@nodes,
arg=>[$args[0]]},\&pass_along);
}
if ($errored) { return; }
#Time to actually configure the nodes, first extract database data with the scalable calls
my $bptab = xCAT::Table->new('bootparams',-create=>1);
my $chaintab = xCAT::Table->new('chain');
my $mactab = xCAT::Table->new('mac'); #to get all the hostnames
my %bphash = %{$bptab->getNodesAttribs(\@nodes,[qw(kernel initrd kcmdline addkcmdline)])};
my %chainhash = %{$chaintab->getNodesAttribs(\@nodes,[qw(currstate)])};
my %machash = %{$mactab->getNodesAttribs(\@nodes,[qw(mac)])};
mkpath($tftpdir."/xcat/xnba/nodes/");
foreach (@nodes) {
my %response;
$response{node}->[0]->{name}->[0]=$_;
if ($args[0] eq 'stat') {
$response{node}->[0]->{data}->[0]= getstate($_);
$callback->(\%response);
} elsif ($args[0]) { #If anything else, send it on to the destiny plugin, then setstate
($rc,$errstr) = setstate($_,\%bphash,\%chainhash,\%machash);
if ($rc) {
$response{node}->[0]->{errorcode}->[0]= $rc;
$response{node}->[0]->{errorc}->[0]= $errstr;
$callback->(\%response);
}
}
}
my $inittime=0;
if (exists($request->{inittime})) { $inittime= $request->{inittime}->[0];}
if (!$inittime) { $inittime=0;}
#dhcp stuff -- inittime is set when xcatd on sn is started
unless (($args[0] eq 'stat') || ($inittime)) {
my $do_dhcpsetup=1;
my $sitetab = xCAT::Table->new('site');
if ($sitetab) {
(my $ref) = $sitetab->getAttribs({key => 'dhcpsetup'}, 'value');
if ($ref) {
if ($ref->{value} =~ /0|n|N/) { $do_dhcpsetup=0; }
}
}
if ($do_dhcpsetup) {
if ($request->{'_disparatetftp'}->[0]) { #reading hint from preprocess_command
$sub_req->({command=>['makedhcp'],arg=>['-l'],
node=>\@nodes},$callback);
} else {
$sub_req->({command=>['makedhcp'],
node=>\@nodes},$callback);
}
}
}
#now run the end part of the prescripts
unless ($args[0] eq 'stat') { # or $args[0] eq 'enact')
$errored=0;
if ($request->{'_disparatetftp'}->[0]) { #the call is distrubuted to the service node already, so only need to handles my own children
$sub_req->({command=>['runendpre'],
node=>\@nodes,
arg=>[$args[0], '-l']},\&pass_along);
} else { #nodeset did not distribute to the service node, here we need to let runednpre to distribute the nodes to their masters
$sub_req->({command=>['runendpre'],
node=>\@rnodes,
arg=>[$args[0]]},\&pass_along);
}
if ($errored) { return; }
}
}
#----------------------------------------------------------------------------
=head3 getNodesetStates
returns the nodeset state for the given nodes. The possible nodeset
states are: netboot, install, boot and discover.
Arguments:
nodes --- a pointer to an array of nodes
states -- a pointer to a hash table. This hash will be filled by this
function. The key is the nodeset status and the value is a pointer
to an array of nodes.
Returns:
(return code, error message)
=cut
#-----------------------------------------------------------------------------
sub getNodesetStates {
my $noderef=shift;
if ($noderef =~ /xCAT_plugin::pxe/) {
$noderef=shift;
}
my @nodes=@$noderef;
my $hashref=shift;
if (@nodes>0) {
foreach my $node (@nodes) {
my $tmp=getstate($node);
my @a=split(' ', $tmp);
$stat = $a[0];
if (exists($hashref->{$stat})) {
my $pa=$hashref->{$stat};
push(@$pa, $node);
}
else {
$hashref->{$stat}=[$node];
}
}
}
return (0, "");
}
1;
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