40e144b4cc
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@13467 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
290 lines
11 KiB
Perl
290 lines
11 KiB
Perl
#!/usr/bin/env perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT_plugin::nodediscover;
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use xCAT::Table;
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use IO::Socket;
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use strict;
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use XML::Simple;
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$XML::Simple::PREFERRED_PARSER='XML::Parser';
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use Data::Dumper;
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use POSIX "WNOHANG";
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use Storable qw(freeze thaw);
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use IO::Select;
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use IO::Handle;
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use xCAT::Utils;
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use Sys::Syslog;
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use Text::Balanced qw(extract_bracketed);
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sub gethosttag {
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#This function tries to return a good hostname for a node based on the
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#network to which it is connected (by $netn or maybe $ifname)
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#heuristic:
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#if the client had a valid IP address from a dhcp server, that is used as key
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#once the matching network is found, and an explicit mapping defined, try that
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#next, try to see if the ip for the case where hostname==nodename is on this net, if so, return that
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#next, try to do nodename-ifname, return that if successful
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#next, repeat process for all networks that have the common mgtifname field
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#return undef for now if none of the above worked
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my $node = shift;
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my $netn = shift;
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my $ifname = shift;
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my $usednames = shift;
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my %netmap = %{xCAT::NetworkUtils::my_if_netmap()};
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my $mgtifname = $netmap{$netn};
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my $secondpass = 0;
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my $name = "";
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my $defhost = inet_aton($node);
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my $nettab = xCAT::Table->new('networks');
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my $defn="";
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my @netents = @{$nettab->getAllEntries()};
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my $pass;
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#TODO: mgtifname field will get trounced in hierarchical setup, use a live check to match accurately
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foreach (@netents) {
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if ($_->{net} eq $netn or ($mgtifname and $mgtifname eq $netmap{$_->{net}})) { #either is the network or shares physical interface
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if ($_->{nodehostname}) { #Check for a nodehostname rule in the table
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$name = $node;
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if ($_->{nodehostname} =~ /^\/[^\/]*\/[^\/]*\/$/)
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{
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my $exp = substr($_->{nodehostname}, 1);
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chop $exp;
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my @parts = split('/', $exp, 2);
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$name =~ s/$parts[0]/$parts[1]/;
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}
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elsif ($_->{nodehostname} =~ /^\|.*\|.*\|$/)
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{
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#Perform arithmetic and only arithmetic operations in bracketed issues on the right.
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#Tricky part: don't allow potentially dangerous code, only eval if
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#to-be-evaled expression is only made up of ()\d+-/%$
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#Futher paranoia? use Safe module to make sure I'm good
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my $exp = substr($_->{nodehostname}, 1);
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chop $exp;
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my @parts = split('\|', $exp, 2);
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my $curr;
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my $next;
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my $prev;
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my $retval = $parts[1];
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($curr, $next, $prev) =
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extract_bracketed($retval, '()', qr/[^()]*/);
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unless($curr) { #If there were no paramaters to save, treat this one like a plain regex
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$name =~ s/$parts[0]/$parts[1]/;
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}
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while ($curr)
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{
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#my $next = $comps[0];
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if ($curr =~ /^[\{\}()\-\+\/\%\*\$\d]+$/ or $curr =~ /^\(sprintf\(["'%\dcsduoxefg]+,\s*[\{\}()\-\+\/\%\*\$\d]+\)\)$/ )
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{
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use integer;
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#We only allow integer operations, they are the ones that make sense for the application
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my $value = $name;
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$value =~ s/$parts[0]/$curr/ee;
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$retval = $prev . $value . $next;
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}
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else
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{
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print "$curr is bad\n";
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}
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($curr, $next, $prev) =
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extract_bracketed($retval, '()', qr/[^()]*/);
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}
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#At this point, $retval is the expression after being arithmetically contemplated, a generated regex, and therefore
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#must be applied in total
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$name =~ s/$parts[0]/$retval/;
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#print Data::Dumper::Dumper(extract_bracketed($parts[1],'()',qr/[^()]*/));
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#use text::balanced extract_bracketed to parse earch atom, make sure nothing but arith operators, parans, and numbers are in it to guard against code execution
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}
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print "Name: $name\n";
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#$name =~ s/$left/$right/;
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if ($name and inet_aton($name)) {
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if ($netn eq $_->{net} and not $usednames->{$name}) { return $name; }
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#At this point, it could still be valid if block was entered due to mgtifname
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my $nnetn = inet_ntoa(pack("N",unpack("N",inet_aton($name)) & unpack("N",inet_aton($_->{mask}))));
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if ($nnetn eq $_->{net} and not $usednames->{$name}) { return $name; }
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}
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$name=""; #Still here, this branch failed
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}
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$defn="";
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if ($defhost) {
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$defn = inet_ntoa(pack("N",unpack("N",$defhost) & unpack("N",inet_aton($_->{mask}))));
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}
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if ($defn eq $_->{net} and not $usednames->{$node}) { #the default nodename is on this network
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return $node;
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}
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my $tentativehost = $node . "-".$ifname;
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my $tnh = inet_aton($tentativehost);
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if ($tnh) {
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my $nnetn = inet_ntoa(pack("N",unpack("N",$tnh) & unpack("N",inet_aton($_->{mask}))));
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if ($nnetn eq $_->{net} and not $usednames->{$tentativehost}) {
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return $tentativehost;
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}
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}
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}
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}
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}
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sub handled_commands {
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return {
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#discovered => 'chain:ondiscover',
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discovered => 'nodediscover',
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};
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}
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sub process_request {
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my $request = shift;
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my $callback = shift;
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my $doreq = shift;
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my $node = $request->{node}->[0];
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my $ip = $request->{'_xcat_clientip'};
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openlog("xCAT node discovery",'','local0');
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#First, fill in tables with data fields..
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if (defined($request->{mtm}) or defined($request->{serial})) {
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my $vpdtab = xCAT::Table->new("vpd",-create=>1);
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if ($request->{uuid}->[0]) {
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$vpdtab->setNodeAttribs($node,{uuid=>$request->{uuid}->[0]});
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}
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if ($request->{mtm}->[0]) {
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$vpdtab->setNodeAttribs($node,{mtm=>$request->{mtm}->[0]});
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}
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if ($request->{serial}) {
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$vpdtab->setNodeAttribs($node,{serial=>$request->{serial}->[0]});
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}
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}
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my $nrtab;
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my @discoverynics;
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my @forcenics; #list of 'eth' style interface names to require to come up on post-discovery client dhcp restart
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if (defined($request->{arch})) {
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#Set the architecture in nodetype. If 32-bit only x86 or ppc detected, overwrite. If x86_64, only set if either not set or not an x86 family
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my $typetab=xCAT::Table->new("nodetype",-create=>1);
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(my $nent) = $typetab->getNodeAttribs($node,['arch','supportedarchs']);
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if ($request->{arch}->[0] =~ /x86_64/) {
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if ($nent and ($nent->{arch} =~ /x86/)) { #If already an x86 variant, do not change
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unless ($nent and $nent->{supportedarchs} =~ /x86_64/) {
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$typetab->setNodeAttribs($node,{supportedarchs=>"x86,x86_64"});
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}
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} else {
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$typetab->setNodeAttribs($node,{arch=>$request->{arch}->[0],supportedarchs=>"x86,x86_64"});
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#this check is so that if an admin explicitly declares a node 'x86', the 64 bit capability is ignored
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}
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} else {
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unless ($nent and $nent->{supportedarchs} eq $request->{arch}->[0] and $nent->{arch} eq $request->{arch}->[0]) {
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$typetab->setNodeAttribs($node,{arch=>$request->{arch}->[0],supportedarchs=>$request->{arch}->[0]});
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}
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}
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my $currboot='';
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$nrtab = xCAT::Table->new('noderes'); #Attempt to check and set if wrong the netboot method on discovery, if admin omitted
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(my $rent) = $nrtab->getNodeAttribs($node,['netboot','discoverynics']);
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if ($rent and defined $rent->{discoverynics}) {
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@discoverynics=split /,/,$rent->{discoverynics};
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}
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if ($rent and $rent->{'netboot'}) {
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$currboot=$rent->{'netboot'};
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}
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if ($request->{arch}->[0] =~ /x86/ and $currboot !~ /pxe/ and $currboot !~ /xnba/) {
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$nrtab->setNodeAttribs($node,{netboot=>'xnba'});
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} elsif ($request->{arch}->[0] =~ /ppc/ and $currboot !~ /yaboot/) {
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$nrtab->setNodeAttribs($node,{netboot=>'yaboot'});
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}
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}
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if (defined($request->{mac})) {
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my $mactab = xCAT::Table->new("mac",-create=>1);
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my @ifinfo;
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my $macstring = "";
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my %usednames;
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my %bydriverindex;
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my $forcenic=0; #-1 is force skip, 0 is use default behavior, 1 is force to be declared even if hosttag is skipped to do so
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foreach (@{$request->{mac}}) {
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@ifinfo = split /\|/;
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if ($ifinfo[1] eq 'usb0') { #skip usb nic
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next;
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}
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$bydriverindex{$ifinfo[0]} += 1;
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if (scalar @discoverynics) {
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$forcenic=-1; #$forcenic defaults to explicitly skip nic
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foreach my $nic (@discoverynics) {
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if ($nic =~ /:/) { #syntax like 'bnx2:0' to say the first bnx2 managed interface
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(my $driver,my $index) = split /:/,$nic;
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if ($driver eq $ifinfo[0] and $index == ($bydriverindex{$driver}-1)) {
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$forcenic=1; #force nic to be put into database
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push @forcenics,$ifinfo[1];
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last;
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}
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} else { #simple 'eth2' sort of argument
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if ($nic eq $ifinfo[1]) {
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push @forcenics,$ifinfo[1];
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$forcenic=1;
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last;
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}
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}
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}
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}
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if ($forcenic == -1) { #if force to skip, go to next nic
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next;
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}
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my $currmac = lc($ifinfo[2]);
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if ($ifinfo[3]) {
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(my $ip,my $netbits) = split /\//,$ifinfo[3];
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if ($ip =~ /\d+\.\d+\.\d+\.\d+/) {
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my $ipn = unpack("N",inet_aton($ip));
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my $mask = 2**$netbits-1<<(32-$netbits);
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my $netn = inet_ntoa(pack("N",$ipn & $mask));
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my $hosttag = gethosttag($node,$netn,@ifinfo[1],\%usednames);
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print Dumper($hosttag) . "\n";
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if ($hosttag) {
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$usednames{$hosttag}=1;
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if ($hosttag eq $node) {
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$macstring .= $currmac."|";
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} else {
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$macstring .= $currmac."!".$hosttag."|";
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}
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} else {
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if ($forcenic == 1) { $macstring .= $currmac."|"; } else { $macstring .= $currmac."!*NOIP*|"; }
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}
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}
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} else {
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if ($forcenic == 1) { $macstring .= $currmac."|"; }
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}
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}
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$macstring =~ s/\|\z//;
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$mactab->setNodeAttribs($node,{mac=>$macstring});
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my %request = (
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command => ['makedhcp'],
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node => [$node]
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);
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$doreq->(\%request);
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}
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#TODO: mac table? on the one hand, 'the' definitive interface was determined earlier...
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#Delete the state it was in to make it traverse destiny once agoin
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my $chaintab = xCAT::Table->new('chain');
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if ($chaintab) {
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$chaintab->setNodeAttribs($node,{currstate=>'',currchain=>''});
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$chaintab->close();
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}
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my $restartstring = "restart";
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if (scalar @forcenics > 0) {
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$restartstring .= " (".join("|",@forcenics).")";
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}
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#now, notify the node to continue life
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my $sock = new IO::Socket::INET (
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PeerAddr => $ip,
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PeerPort => '3001',
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Timeout => '1',
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Proto => 'tcp'
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);
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unless ($sock) { syslog("err","Failed to notify $ip that it's actually $node."); return; } #Give up if the node won't hear of it.
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print $sock $restartstring;
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close($sock);
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syslog("info","$node has been discovered");
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}
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1;
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