886b0dc575
-Have dhcpd recognize Etherboot clients and presume x86 (Xen net boot support) git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2072 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
646 lines
17 KiB
Perl
646 lines
17 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::xen;
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my $libvirtsupport;
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$libvirtsupport = eval { require Sys::Virt; };
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#use Net::SNMP qw(:snmp INTEGER);
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use xCAT::Table;
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use XML::Simple qw(XMLout);
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use Thread qw(yield);
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use IO::Socket;
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use IO::Select;
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use SNMP;
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use strict;
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#use warnings;
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my %vm_comm_pids;
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my $vmhash;
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my $hmhash;
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use XML::Simple;
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if ($^O =~ /^linux/i) {
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$XML::Simple::PREFERRED_PARSER='XML::Parser';
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}
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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 Time::HiRes qw(gettimeofday sleep);
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use Net::Telnet;
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use xCAT::DBobjUtils;
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use Getopt::Long;
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my %runningstates;
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my $vmmaxp;
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my $mactab;
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my $nrtab;
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my $machash;
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sub handled_commands {
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unless ($libvirtsupport) {
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return {};
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}
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return {
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rpower => 'nodehm:power,mgt',
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rmigrate => 'nodehm:mgt',
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getxencons => 'nodehm:mgt',
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#rvitals => 'nodehm:mgt',
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#rinv => 'nodehm:mgt',
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rbeacon => 'nodehm:mgt',
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#rspreset => 'nodehm:mgt',
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#rspconfig => 'nodehm:mgt',
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#rbootseq => 'nodehm:mgt',
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#reventlog => 'nodehm:mgt',
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};
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}
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my $virsh;
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my $vmhash;
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my $hypconn;
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my $hyp;
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my $doreq;
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my %hyphash;
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my $node;
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my $hmtab;
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my $vmtab;
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sub waitforack {
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my $sock = shift;
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my $select = new IO::Select;
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$select->add($sock);
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my $str;
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if ($select->can_read(10)) { # Continue after 10 seconds, even if not acked...
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if ($str = <$sock>) {
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} else {
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$select->remove($sock); #Block until parent acks data
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}
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}
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}
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sub build_oshash {
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my %rethash;
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$rethash{type}->{content}='hvm';
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$rethash{loader}->{content}='/usr/lib/xen/boot/hvmloader';
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$rethash{boot}->[0]->{dev}='network';
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$rethash{boot}->[1]->{dev}='hd';
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return \%rethash;
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}
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sub build_diskstruct {
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my @returns=();
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my $diskhash;
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my $currdev;
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my @suffixes=('a'..'z');
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my $suffidx=0;
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if (defined $vmhash->{$node}->[0]->{storage}) {
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my $disklocs=$vmhash->{$node}->[0]->{storage};
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my @locations=split /\|/,$disklocs;
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foreach (@locations) {
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$currdev='hd'.$suffixes[$suffidx++];
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$diskhash->{type}='file';
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$diskhash->{source}->{file}=$_; #"/vms/$node";
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$diskhash->{target}->{dev}=$currdev;
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push @returns,$diskhash;
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}
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}
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return \@returns;
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}
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sub getNodeUUID {
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my $node = shift;
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return xCAT::Utils::genUUID();
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}
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sub build_nicstruct {
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my $rethash;
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my $node = shift;
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my @macs=();
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if ($machash->{$node}->[0]->{mac}) {
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my $macdata=$machash->{$node}->[0]->{mac};
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foreach my $macaddr (split /\|/,$macdata) {
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$macaddr =~ s/\!.*//;
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push @macs,$macaddr;
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}
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}
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unless (scalar(@macs)) {
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my $allbutmult = 65279; # & mask for bitwise clearing of the multicast bit of mac
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my $localad=512; # | to set the bit for locally admnistered mac address
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my $leading=int(rand(65535));
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$leading=$leading|512;
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$leading=$leading&65279;
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my $n=inet_aton($node);
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my $tail;
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if ($n) {
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$tail=unpack("N",$n);
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}
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unless ($tail) {
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$tail=int(rand(4294967295));
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}
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my $macstr = sprintf("%04x%08x",$leading,$tail);
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$macstr =~ s/(..)(..)(..)(..)(..)(..)/$1:$2:$3:$4:$5:$6/;
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$mactab->setNodeAttribs($node,{mac=>$macstr});
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$nrtab->setNodeAttribs($node,{netboot=>'pxe'});
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$doreq->({command=>['makedhcp'],node=>[$node]});
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push @macs,$macstr;
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}
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my @rethashes;
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foreach (@macs) {
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my $rethash;
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$rethash->{type}='bridge';
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$rethash->{mac}->{address}=$_;
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push @rethashes,$rethash;
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}
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return \@rethashes;
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}
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sub getUnits {
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my $amount = shift;
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my $defunit = shift;
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my $divisor=shift;
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unless ($divisor) {
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$divisor = 1;
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}
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if ($amount =~ /(\D)$/) { #If unitless, add unit
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$defunit=$1;
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chop $amount;
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}
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if ($defunit =~ /k/i) {
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return $amount*1024/$divisor;
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} elsif ($defunit =~ /m/i) {
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return $amount*1048576/$divisor;
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} elsif ($defunit =~ /g/i) {
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return $amount*1073741824/$divisor;
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}
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}
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sub build_xmldesc {
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my $node = shift;
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my %xtree=();
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$xtree{type}='xen';
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$xtree{name}->{content}=$node;
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$xtree{uuid}->{content}=getNodeUUID($node);
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$xtree{os} = build_oshash();
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if (defined $vmhash->{$node}->[0]->{memory}) {
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$xtree{memory}->{content}=getUnits($vmhash->{$node}->[0]->{memory},"M",1024);
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} else {
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$xtree{memory}->{content}=524288;
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}
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$xtree{vcpu}->{content}=1;
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$xtree{features}->{pae}={};
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$xtree{features}->{acpi}={};
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$xtree{features}->{apic}={};
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$xtree{features}->{content}="\n";
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$xtree{devices}->{emulator}->{content}='/usr/lib64/xen/bin/qemu-dm';
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$xtree{devices}->{disk}=build_diskstruct();
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$xtree{devices}->{interface}=build_nicstruct($node);
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$xtree{devices}->{graphics}->{type}='vnc';
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$xtree{devices}->{console}->{type}='pty';
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$xtree{devices}->{console}->{target}->{port}='1';
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return XMLout(\%xtree,RootName=>"domain");
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}
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sub refresh_vm {
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my $dom = shift;
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my $newxml=XMLin($dom->get_xml_description());
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my $vncport=$newxml->{devices}->{graphics}->{port};
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my $stty=$newxml->{devices}->{console}->{tty};
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$vmtab->setNodeAttribs($node,{vncport=>$vncport,textconsole=>$stty});
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return {vncport=>$vncport,textconsole=>$stty};
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}
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sub getvmcons {
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my $node = shift();
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my $type = shift();
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my $dom;
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eval {
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$dom = $hypconn->get_domain_by_name($node);
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};
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unless ($dom) {
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return 1,"Unable to query running VM";
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}
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my $consdata=refresh_vm($dom);
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my $hyper=$vmhash->{$node}->[0]->{host};
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if ($type eq "text") {
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my $serialspeed;
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if ($hmhash) {
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$serialspeed=$hmhash->{$node}->[0]->{serialspeed};
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}
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my $sconsparms = {node=>[{name=>[$node]}]};
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$sconsparms->{node}->[0]->{sshhost}=[$hyper];
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$sconsparms->{node}->[0]->{psuedotty}=[$consdata->{textconsole}];
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$sconsparms->{node}->[0]->{baudrate}=[$serialspeed];
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return (0,$sconsparms);
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} elsif ($type eq "vnc") {
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return (0,'ssh+vnc@'.$hyper.": ".$consdata->{vncport});
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}
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}
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sub migrate {
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my $node = shift();
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my $targ = shift();
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my $prevhyp;
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my $target = "xen+ssh://".$targ;
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my $currhyp="xen+ssh://";
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if ($vmhash->{$node}->[0]->{host}) {
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$prevhyp=$vmhash->{$node}->[0]->{host};
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$currhyp.=$prevhyp;
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} else {
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return (1,"Unable to find current location of $node");
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}
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my $sock = IO::Socket::INET->new(Proto=>'udp');
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my $ipa=inet_aton($node);
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my $pa=sockaddr_in(7,$ipa); #UDP echo service, not needed to be actually
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#serviced, we just want to trigger an arp query
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my $rc=system("virsh -c $currhyp migrate --live $node $target");
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system("arp -d $node"); #Make ethernet fabric take note of change
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send($sock,"dummy",0,$pa);
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my $newhypconn= Sys::Virt->new(uri=>"xen+ssh://".$targ);
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my $dom;
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eval {
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$dom = $newhypconn->get_domain_by_name($node);
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};
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$vmtab->setNodeAttribs($node,{host=>$targ});
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if ($dom) {
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refresh_vm($dom);
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}
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if ($rc) {
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return (1,"Failed migration from $prevhyp to $targ");
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} else {
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return (0,"migrated to $targ");
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}
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}
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sub getpowstate {
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my $dom = shift;
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my $vmstat;
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if ($dom) {
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$vmstat = $dom->get_info;
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}
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if ($vmstat and $runningstates{$vmstat->{state}}) {
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return "on";
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} else {
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return "off";
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}
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}
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sub power {
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my $subcommand = shift;
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my $retstring;
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my $dom;
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eval {
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$dom = $hypconn->get_domain_by_name($node);
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};
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if ($subcommand eq "boot") {
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my $currstate=getpowstate($dom);
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$retstring=$currstate." ";
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if ($currstate eq "off") {
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$subcommand="on";
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} elsif ($currstate eq "on") {
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$subcommand="reset";
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}
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}
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if ($subcommand eq 'on') {
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unless ($dom) {
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my $xml=build_xmldesc($node);
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my $errstr;
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eval { $dom=$hypconn->create_domain($xml); };
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if ($@) { $errstr = $@; }
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if (ref $errstr) {
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$errstr = ":".$errstr->{message};
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}
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if ($errstr) { return (1,$errstr); }
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if ($dom) {
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refresh_vm($dom);
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}
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}
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} elsif ($subcommand eq 'off') {
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if ($dom) {
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$dom->destroy();
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}
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} elsif ($subcommand eq 'softoff') {
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if ($dom) {
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$dom->shutdown();
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}
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} elsif ($subcommand eq 'reset') {
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if ($dom) {
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$dom->reboot(1); #TODO: Sys::Virt *nor* libvirt have meaningful flags,
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#but require it
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$retstring.="reset";
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}
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} else {
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unless ($subcommand =~ /^stat/) {
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return (1,"Unsupported power directive '$subcommand'");
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}
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}
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unless ($retstring =~ /reset/) {
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$retstring.=getpowstate($dom);
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}
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return (0,$retstring);
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}
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sub guestcmd {
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$hyp = shift;
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$node = shift;
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my $command = shift;
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my @args = @_;
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my $error;
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if ($command eq "rpower") {
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return power(@args);
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} elsif ($command eq "rmigrate") {
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return migrate($node,@args);
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} elsif ($command eq "getxencons") {
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return getvmcons($node,@args);
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}
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=cut
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} elsif ($command eq "rvitals") {
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return vitals(@args);
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} elsif ($command =~ /r[ms]preset/) {
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return resetmp(@args);
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} elsif ($command eq "rspconfig") {
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return mpaconfig($mpa,$user,$pass,$node,$slot,@args);
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} elsif ($command eq "rbootseq") {
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return bootseq(@args);
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} elsif ($command eq "switchblade") {
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return switchblade(@args);
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} elsif ($command eq "getmacs") {
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return getmacs(@args);
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} elsif ($command eq "rinv") {
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return inv(@args);
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} elsif ($command eq "reventlog") {
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return eventlog(@args);
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} elsif ($command eq "rscan") {
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return rscan(\@args);
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}
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=cut
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return (1,"$command not a supported command by xen method");
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}
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sub preprocess_request {
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my $request = shift;
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if ($request->{_xcatdest}) { return [$request]; } #exit if preprocessed
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my $callback=shift;
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unless ($libvirtsupport) { #Try to see if conditions changed since last check (no xCATd restart for it to take effect)
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$libvirtsupport = eval { require Sys::Virt; };
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}
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unless ($libvirtsupport) { #Still no Sys::Virt module
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$callback->({error=>"Sys::Virt perl module missing, unable to fulfill Xen plugin requirements",errorcode=>[42]});
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return [];
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}
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require Sys::Virt::Domain;
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%runningstates = (&Sys::Virt::Domain::STATE_NOSTATE=>1,&Sys::Virt::Domain::STATE_RUNNING=>1,&Sys::Virt::Domain::STATE_BLOCKED=>1);
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my @requests;
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my $noderange = $request->{node}; #Should be arrayref
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my $command = $request->{command}->[0];
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my $extrargs = $request->{arg};
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my @exargs=($request->{arg});
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if (ref($extrargs)) {
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@exargs=@$extrargs;
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}
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my $usage_string=xCAT::Usage->parseCommand($command, @exargs);
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if ($usage_string) {
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$callback->({data=>$usage_string});
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$request = {};
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return;
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}
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if (!$noderange) {
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$usage_string=xCAT::Usage->getUsage($command);
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$callback->({data=>$usage_string});
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$request = {};
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return;
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}
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#print "noderange=@$noderange\n";
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# find service nodes for requested nodes
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# build an individual request for each service node
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my $service = "xcat";
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my $sn = xCAT::Utils->get_ServiceNode($noderange, $service, "MN");
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# build each request for each service node
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foreach my $snkey (keys %$sn)
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{
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#print "snkey=$snkey\n";
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my $reqcopy = {%$request};
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$reqcopy->{node} = $sn->{$snkey};
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$reqcopy->{'_xcatdest'} = $snkey;
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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 adopt {
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#TODO: adopt orphans into suitable homes if possible
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return 0;
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}
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sub grab_table_data{
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my $noderange=shift;
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my $callback=shift;
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$vmtab = xCAT::Table->new("vm");
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$hmtab = xCAT::Table->new("nodehm");
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if ($hmtab) {
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$hmhash = $hmtab->getNodesAttribs($noderange,['serialspeed']);
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}
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unless ($vmtab) {
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$callback->({data=>["Cannot open vm table"]});
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return;
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}
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$vmhash = $vmtab->getNodesAttribs($noderange,['node','host','migrationdest','storage','memory','cpu','nics','bootorder','virtflags']);
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$mactab = xCAT::Table->new("mac",-create=>1);
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$nrtab= xCAT::Table->new("noderes",-create=>1);
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$machash = $mactab->getNodesAttribs($noderange,['mac']);
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}
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sub process_request {
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$SIG{INT} = $SIG{TERM} = sub {
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foreach (keys %vm_comm_pids) {
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kill 2, $_;
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}
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exit 0;
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};
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my $request = shift;
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my $callback = shift;
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$doreq = shift;
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my $level = shift;
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my $noderange = $request->{node};
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my $command = $request->{command}->[0];
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my @exargs;
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unless ($command) {
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return; #Empty request
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}
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if (ref($request->{arg})) {
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@exargs = @{$request->{arg}};
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} else {
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@exargs = ($request->{arg});
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}
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grab_table_data($noderange,$callback);
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my $sitetab = xCAT::Table->new('site');
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my $tmp;
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if ($sitetab) {
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($tmp)=$sitetab->getAttribs({'key'=>'vmmaxp'},'value');
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if (defined($tmp)) { $vmmaxp=$tmp->{value}; }
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}
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my $children = 0;
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$SIG{CHLD} = sub { my $cpid; while ($cpid = waitpid(-1, WNOHANG) > 0) { delete $vm_comm_pids{$cpid}; $children--; } };
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my $inputs = new IO::Select;;
|
|
my $sub_fds = new IO::Select;
|
|
%hyphash=();
|
|
my %orphans=();
|
|
foreach (keys %{$vmhash}) {
|
|
if ($vmhash->{$_}->[0]->{host}) {
|
|
$hyphash{$vmhash->{$_}->[0]->{host}}->{nodes}->{$_}=1;
|
|
} else {
|
|
$orphans{$_}=1;
|
|
}
|
|
}
|
|
if (keys %orphans) {
|
|
if ($command eq "rpower" and (grep /^on$/,@exargs or grep /^boot$/,@exargs)) {
|
|
unless (adopt(\%orphans,\%hyphash)) {
|
|
$callback->({error=>"Can't find ".join(",",keys %orphans),errorcode=>[1]});
|
|
return 1;
|
|
}
|
|
|
|
} elsif ($command eq "rmigrate") {
|
|
$callback->({error=>"Can't find ".join(",",keys %orphans),errorcode=>[1]});
|
|
return;
|
|
} else {
|
|
$callback->({error=>"Can't find ".join(",",keys %orphans),errorcode=>[1]});
|
|
return;
|
|
}
|
|
}
|
|
if ($command eq "rbeacon") {
|
|
my %req=();
|
|
$req{command}=['rbeacon'];
|
|
$req{arg}=\@exargs;
|
|
$req{node}=[keys %hyphash];
|
|
$doreq->(\%req,$callback);
|
|
return;
|
|
}
|
|
|
|
foreach $hyp (sort (keys %hyphash)) {
|
|
while ($children > $vmmaxp) { forward_data($callback,$sub_fds); }
|
|
$children++;
|
|
my $cfd;
|
|
my $pfd;
|
|
socketpair($pfd, $cfd,AF_UNIX,SOCK_STREAM,PF_UNSPEC) or die "socketpair: $!";
|
|
$cfd->autoflush(1);
|
|
$pfd->autoflush(1);
|
|
my $cpid = xCAT::Utils->xfork;
|
|
unless (defined($cpid)) { die "Fork error"; }
|
|
unless ($cpid) {
|
|
close($cfd);
|
|
dohyp($pfd,$hyp,$command,-args=>\@exargs);
|
|
exit(0);
|
|
}
|
|
$vm_comm_pids{$cpid} = 1;
|
|
close ($pfd);
|
|
$sub_fds->add($cfd);
|
|
}
|
|
while ($sub_fds->count > 0 or $children > 0) {
|
|
forward_data($callback,$sub_fds);
|
|
}
|
|
while (forward_data($callback,$sub_fds)) {}
|
|
}
|
|
|
|
sub forward_data {
|
|
my $callback = shift;
|
|
my $fds = shift;
|
|
my @ready_fds = $fds->can_read(1);
|
|
my $rfh;
|
|
my $rc = @ready_fds;
|
|
foreach $rfh (@ready_fds) {
|
|
my $data;
|
|
if ($data = <$rfh>) {
|
|
while ($data !~ /ENDOFFREEZE6sK4ci/) {
|
|
$data .= <$rfh>;
|
|
}
|
|
print $rfh "ACK\n";
|
|
my $responses=thaw($data);
|
|
foreach (@$responses) {
|
|
$callback->($_);
|
|
}
|
|
} else {
|
|
$fds->remove($rfh);
|
|
close($rfh);
|
|
}
|
|
}
|
|
yield(); #Try to avoid useless iterations as much as possible
|
|
return $rc;
|
|
}
|
|
|
|
|
|
sub dohyp {
|
|
my $out = shift;
|
|
$hyp = shift;
|
|
my $command=shift;
|
|
my %namedargs=@_;
|
|
my @exargs=@{$namedargs{-args}};
|
|
my $node;
|
|
my $args = \@exargs;
|
|
|
|
|
|
$hypconn= Sys::Virt->new(uri=>"xen+ssh://".$hyp);
|
|
unless ($hypconn) {
|
|
my %err=(node=>[]);
|
|
foreach (keys %{$hyphash{$hyp}->{nodes}}) {
|
|
push (@{$err{node}},{name=>[$_],error=>["Cannot communicate via libvirt to $hyp"],errorcode=>[1]});
|
|
}
|
|
print $out freeze([\%err]);
|
|
print $out "\nENDOFFREEZE6sK4ci\n";
|
|
yield();
|
|
waitforack($out);
|
|
return 1,"General error establishing libvirt communication";
|
|
}
|
|
foreach $node (sort (keys %{$hyphash{$hyp}->{nodes}})) {
|
|
my ($rc,@output) = guestcmd($hyp,$node,$command,@$args);
|
|
|
|
foreach(@output) {
|
|
my %output;
|
|
if (ref($_)) {
|
|
print $out freeze([$_]);
|
|
print $out "\nENDOFFREEZE6sK4ci\n";
|
|
yield();
|
|
waitforack($out);
|
|
next;
|
|
}
|
|
|
|
(my $desc,my $text) = split (/:/,$_,2);
|
|
unless ($text) {
|
|
$text=$desc;
|
|
} else {
|
|
$desc =~ s/^\s+//;
|
|
$desc =~ s/\s+$//;
|
|
if ($desc) {
|
|
$output{node}->[0]->{data}->[0]->{desc}->[0]=$desc;
|
|
}
|
|
}
|
|
$text =~ s/^\s+//;
|
|
$text =~ s/\s+$//;
|
|
$output{node}->[0]->{errorcode} = $rc;
|
|
$output{node}->[0]->{name}->[0]=$node;
|
|
$output{node}->[0]->{data}->[0]->{contents}->[0]=$text;
|
|
print $out freeze([\%output]);
|
|
print $out "\nENDOFFREEZE6sK4ci\n";
|
|
yield();
|
|
waitforack($out);
|
|
}
|
|
yield();
|
|
}
|
|
#my $msgtoparent=freeze(\@outhashes); # = XMLout(\%output,RootName => 'xcatresponse');
|
|
#print $out $msgtoparent; #$node.": $_\n";
|
|
}
|
|
|
|
1;
|