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xcat-core/xCAT-server/lib/xcat/plugins/xen.pm
jbjohnso cbdedfac21 -Fix syntax issues with subshell in xen and kvm migration 
-Fix test hang when preparing a migration
-document nics as a TODO (have to decide a sane syntax for user, then implement)



git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2762 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
2009-02-17 21:07:20 +00:00

966 lines
28 KiB
Perl
Raw Blame History

#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
package xCAT_plugin::xen;
my $libvirtsupport;
$libvirtsupport = eval { require Sys::Virt; };
BEGIN
{
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
}
use lib "$::XCATROOT/lib/perl";
use xCAT::GlobalDef;
use xCAT::NodeRange;
use xCAT_monitoring::monitorctrl;
#use Net::SNMP qw(:snmp INTEGER);
use xCAT::Table;
use XML::Simple qw(XMLout);
use Thread qw(yield);
use IO::Socket;
use IO::Select;
use SNMP;
use strict;
#use warnings;
my %vm_comm_pids;
my @destblacklist;
my $vmhash;
my $hmhash;
use XML::Simple;
if ($^O =~ /^linux/i) {
$XML::Simple::PREFERRED_PARSER='XML::Parser';
}
use Data::Dumper;
use POSIX "WNOHANG";
use Storable qw(freeze thaw);
use IO::Select;
use IO::Handle;
use Time::HiRes qw(gettimeofday sleep);
use Net::Telnet;
use xCAT::DBobjUtils;
use Getopt::Long;
my %runningstates;
my $vmmaxp=64;
my $mactab;
my $nrtab;
my $machash;
my $status_noop="XXXno-opXXX";
sub handled_commands {
#unless ($libvirtsupport) {
# return {};
#}
return {
rpower => 'nodehm:power,mgt',
rmigrate => 'nodehm:mgt',
getxencons => 'nodehm:mgt',
#rvitals => 'nodehm:mgt',
#rinv => 'nodehm:mgt',
getrvidparms => 'nodehm:mgt',
rbeacon => 'nodehm:mgt',
revacuate => 'vm:virtflags',
#rspreset => 'nodehm:mgt',
#rspconfig => 'nodehm:mgt',
#rbootseq => 'nodehm:mgt',
#reventlog => 'nodehm:mgt',
};
}
my $virsh;
my $vmhash;
my $hypconn;
my $hyp;
my $doreq;
my %hyphash;
my $node;
my $hmtab;
my $vmtab;
sub waitforack {
my $sock = shift;
my $select = new IO::Select;
$select->add($sock);
my $str;
if ($select->can_read(10)) { # Continue after 10 seconds, even if not acked...
if ($str = <$sock>) {
} else {
$select->remove($sock); #Block until parent acks data
}
}
}
sub build_oshash {
my %rethash;
$rethash{type}->{content}='hvm';
$rethash{loader}->{content}='/usr/lib/xen/boot/hvmloader';
if (defined $vmhash->{$node}->[0]->{bootorder}) {
my $bootorder = $vmhash->{$node}->[0]->{bootorder};
my @bootdevs = split(/:/,$bootorder);
my $bootnum = 0;
foreach (@bootdevs) {
$rethash{boot}->[$bootnum]->{dev}=$_;
$bootnum++;
}
} else {
$rethash{boot}->[0]->{dev}='network';
$rethash{boot}->[1]->{dev}='hd';
}
return \%rethash;
}
sub build_diskstruct {
my @returns=();
my $currdev;
my @suffixes=('a'..'z');
my $suffidx=0;
if (defined $vmhash->{$node}->[0]->{storage}) {
my $disklocs=$vmhash->{$node}->[0]->{storage};
my @locations=split /\|/,$disklocs;
foreach my $disk (@locations) {
#Setting default values of a virtual disk backed by a file at hd*.
my $diskhash;
$diskhash->{type} = 'file';
$diskhash->{device} = 'disk';
$diskhash->{target}->{dev} = 'hd'.$suffixes[$suffidx];
my @disk_parts = split(/,/, $disk);
#Find host file and determine if it is a file or a block device.
if (substr($disk_parts[0], 0, 4) eq 'phy:') {
$diskhash->{type}='block';
$diskhash->{source}->{dev} = substr($disk_parts[0], 4);
} else {
$diskhash->{source}->{file} = $disk_parts[0];
}
#See if there are any other options. If not, increment suffidx because the already determined device node was used.
if (@disk_parts gt 1) {
my @disk_opts = split(/:/, $disk_parts[1]);
if ($disk_opts[0] ne '') {
$diskhash->{target}->{dev} = $disk_opts[0];
} else {
$suffidx++;
}
if ($disk_opts[1] eq 'cdrom') {
$diskhash->{device}='cdrom';
}
} else {
$suffidx++;
}
push @returns,$diskhash;
}
}
return \@returns;
}
sub getNodeUUID {
my $node = shift;
return xCAT::Utils::genUUID();
}
sub build_nicstruct {
my $rethash;
my $node = shift;
my @macs=();
if ($machash->{$node}->[0]->{mac}) {
my $macdata=$machash->{$node}->[0]->{mac};
foreach my $macaddr (split /\|/,$macdata) {
$macaddr =~ s/\!.*//;
push @macs,$macaddr;
}
}
unless (scalar(@macs)) {
my $allbutmult = 65279; # & mask for bitwise clearing of the multicast bit of mac
my $localad=512; # | to set the bit for locally admnistered mac address
my $leading=int(rand(65535));
$leading=$leading|512;
$leading=$leading&65279;
my $n=inet_aton($node);
my $tail;
if ($n) {
$tail=unpack("N",$n);
}
unless ($tail) {
$tail=int(rand(4294967295));
}
my $macstr = sprintf("%04x%08x",$leading,$tail);
$macstr =~ s/(..)(..)(..)(..)(..)(..)/$1:$2:$3:$4:$5:$6/;
$mactab->setNodeAttribs($node,{mac=>$macstr});
$nrtab->setNodeAttribs($node,{netboot=>'pxe'});
$doreq->({command=>['makedhcp'],node=>[$node]});
push @macs,$macstr;
}
my @rethashes;
foreach (@macs) {
my $rethash;
$rethash->{type}='bridge';
$rethash->{mac}->{address}=$_;
$rethash->{source}->{bridge}='xenbr0'; #TODO: support syntax in nics field in table, must be able to tie macs/hostname/network id together
push @rethashes,$rethash;
}
return \@rethashes;
}
sub getUnits {
my $amount = shift;
my $defunit = shift;
my $divisor=shift;
unless ($divisor) {
$divisor = 1;
}
if ($amount =~ /(\D)$/) { #If unitless, add unit
$defunit=$1;
chop $amount;
}
if ($defunit =~ /k/i) {
return $amount*1024/$divisor;
} elsif ($defunit =~ /m/i) {
return $amount*1048576/$divisor;
} elsif ($defunit =~ /g/i) {
return $amount*1073741824/$divisor;
}
}
sub build_xmldesc {
my $node = shift;
my %xtree=();
$xtree{type}='xen';
$xtree{name}->{content}=$node;
$xtree{uuid}->{content}=getNodeUUID($node);
$xtree{os} = build_oshash();
if (defined $vmhash->{$node}->[0]->{memory}) {
$xtree{memory}->{content}=getUnits($vmhash->{$node}->[0]->{memory},"M",1024);
} else {
$xtree{memory}->{content}=524288;
}
$xtree{vcpu}->{content}=1;
$xtree{features}->{pae}={};
$xtree{features}->{acpi}={};
$xtree{features}->{apic}={};
$xtree{features}->{content}="\n";
$xtree{devices}->{emulator}->{content}='/usr/lib64/xen/bin/qemu-dm';
$xtree{devices}->{disk}=build_diskstruct();
$xtree{devices}->{interface}=build_nicstruct($node);
$xtree{devices}->{graphics}->{type}='vnc';
$xtree{devices}->{console}->{type}='pty';
$xtree{devices}->{console}->{target}->{port}='1';
return XMLout(\%xtree,RootName=>"domain");
}
sub refresh_vm {
my $dom = shift;
my $newxml=XMLin($dom->get_xml_description());
my $vncport=$newxml->{devices}->{graphics}->{port};
my $stty=$newxml->{devices}->{console}->{tty};
$vmtab->setNodeAttribs($node,{vncport=>$vncport,textconsole=>$stty});
return {vncport=>$vncport,textconsole=>$stty};
}
sub getvmcons {
my $node = shift();
my $type = shift();
my $dom;
eval {
$dom = $hypconn->get_domain_by_name($node);
};
unless ($dom) {
return 1,"Unable to query running VM";
}
my $consdata=refresh_vm($dom);
my $hyper=$vmhash->{$node}->[0]->{host};
if ($type eq "text") {
my $serialspeed;
if ($hmhash) {
$serialspeed=$hmhash->{$node}->[0]->{serialspeed};
}
my $sconsparms = {node=>[{name=>[$node]}]};
$sconsparms->{node}->[0]->{sshhost}=[$hyper];
$sconsparms->{node}->[0]->{psuedotty}=[$consdata->{textconsole}];
$sconsparms->{node}->[0]->{baudrate}=[$serialspeed];
return (0,$sconsparms);
} elsif ($type eq "vnc") {
my $domdata=`ssh $hyper xm list $node -l`;
my @domlines = split /\n/,$domdata;
my $foundvfb=0;
my $vnclocation;
foreach (@domlines) {
if (/\(vfb/) {
$foundvfb=1;
}
if ($foundvfb and /location\s+([^\)]+)/) {
$vnclocation=$1;
$foundvfb=0;
last;
}
}
return (0,'ssh+vnc@'.$hyper.": ".$vnclocation); #$consdata->{vncport});
}
}
sub getrvidparms {
my $node=shift;
my $location = getvmcons($node,"vnc");
if ($location =~ /ssh\+vnc@([^:]*):([^:]*):(\d+)/) {
my @output = (
"method: xen",
"server: $1",
"vncdisplay: $2:$3",
);
return 0,@output;
} else {
return (1,"Error: Unable to determine rvid destination for $node");
}
}
sub pick_target {
my $node = shift;
my $target;
my $leastusedmemory=undef;
my $currentusedmemory;
my $candidates= $vmhash->{$node}->[0]->{migrationdest};
my $currhyp=$vmhash->{$node}->[0]->{host};
unless ($candidates) {
return undef;
}
print "$node with $candidates\n";
foreach (noderange($candidates)) {
my $targconn;
my $cand=$_;
$currentusedmemory=0;
if ($_ eq $currhyp) { next; } #skip current node
if (grep { "$_" eq $cand } @destblacklist) { print "$_ was blacklisted\n"; next; } #skip blacklisted destinations
print "maybe $_\n";
eval { #Sys::Virt has bugs that cause it to die out in weird ways some times, contain it here
$targconn = Sys::Virt->new(uri=>"xen+ssh://".$_."?no_tty=1&netcat=nc");
};
unless ($targconn) {
eval { #Sys::Virt has bugs that cause it to die out in weird ways some times, contain it here
$targconn = Sys::Virt->new(uri=>"xen+ssh://".$_."?no_tty=1");
};
}
unless ($targconn) { next; } #skip unreachable destinations
foreach ($targconn->list_domains()) {
if ($_->get_name() eq 'Domain-0') { next; } #Dom0 memory usage is elastic, we are interested in HVM DomU memory, which is inelastic
$currentusedmemory += $_->get_info()->{memory};
}
if (not defined ($leastusedmemory)) {
$leastusedmemory=$currentusedmemory;
$target=$_;
} elsif ($currentusedmemory < $leastusedmemory) {
$leastusedmemory=$currentusedmemory;
$target=$_;
}
}
return $target;
}
sub migrate {
my $node = shift();
my $targ = shift();
unless ($targ) {
$targ = pick_target($node);
}
unless ($targ) {
return (1,"Unable to identify a suitable target host for guest $node");
}
my $prevhyp;
my $target = "xen+ssh://".$targ."?no_tty=1";
my $currhyp="xen+ssh://";
if ($vmhash->{$node}->[0]->{host}) {
$prevhyp=$vmhash->{$node}->[0]->{host};
$currhyp.=$prevhyp;
} else {
return (1,"Unable to find current location of $node");
}
$currhyp.="?no_tty=1";
if ($currhyp eq $target) {
return (0,"Guest is already on host $targ");
}
my $testhypconn;
my $srcnetcatadd="&netcat=nc";
eval {#Contain Sys::Virt bugs
$testhypconn= Sys::Virt->new(uri=>"xen+ssh://".$prevhyp."?no_tty=1$srcnetcatadd");
};
unless ($testhypconn) {
$srcnetcatadd="";
eval {#Contain Sys::Virt bugs
$testhypconn= Sys::Virt->new(uri=>"xen+ssh://".$prevhyp."?no_tty=1");
};
}
unless ($testhypconn) {
return (1,"Unable to reach $prevhyp to perform operation of $node, use nodech to change vm.host if certain of no split-brain possibility exists");
}
my $destnetcatadd="&netcat=nc";
undef $testhypconn;
eval {#Contain Sys::Virt bugs
$testhypconn= Sys::Virt->new(uri=>$target.$destnetcatadd);
};
unless ($testhypconn) {
$destnetcatadd="";
eval {#Contain Sys::Virt bugs
$testhypconn= Sys::Virt->new(uri=>$target);
};
}
unless ($testhypconn) {
return (1,"Unable to reach $targ to perform operation of $node, destination unusable.");
}
my $sock = IO::Socket::INET->new(Proto=>'udp');
my $ipa=inet_aton($node);
my $pa=sockaddr_in(7,$ipa); #UDP echo service, not needed to be actually
#serviced, we just want to trigger MAC move in the switch forwarding dbs
my $rc=system("virsh -c '$currhyp".$srcnetcatadd."' migrate --live $node '$target"."$destnetcatadd'");
system("arp -d $node"); #Make ethernet fabric take note of change
send($sock,"dummy",0,$pa); #UDP packet to force forwarding table update in switches, ideally a garp happened, but just in case...
if ($rc) {
return (1,"Failed migration from $prevhyp to $targ");
} else {
$vmtab->setNodeAttribs($node,{host=>$targ});
my $newhypconn;
eval {#Contain Sys::Virt bugs
$newhypconn= Sys::Virt->new(uri=>"xen+ssh://".$targ."?no_tty=1&netcat=nc");
};
unless ($newhypconn) {
eval {#Contain Sys::Virt bugs
$newhypconn= Sys::Virt->new(uri=>"xen+ssh://".$targ."?no_tty=1");
};
}
if ($newhypconn) {
my $dom;
eval {
$dom = $newhypconn->get_domain_by_name($node);
};
if ($dom) {
refresh_vm($dom);
}
} else {
return (0,"migrated to $targ");
}
return (0,"migrated to $targ");
}
}
sub getpowstate {
my $dom = shift;
my $vmstat;
if ($dom) {
$vmstat = $dom->get_info;
}
if ($vmstat and $runningstates{$vmstat->{state}}) {
return "on";
} else {
return "off";
}
}
sub makedom {
my $node=shift;
my $dom;
my $xml=build_xmldesc($node);
my $errstr;
eval { $dom=$hypconn->create_domain($xml); };
if ($@) { $errstr = $@; }
if (ref $errstr) {
$errstr = ":".$errstr->{message};
}
if ($errstr) { return (undef,$errstr); }
if ($dom) {
refresh_vm($dom);
}
return $dom,undef;
}
sub power {
my $subcommand = shift;
my $retstring;
my $dom;
eval {
$dom = $hypconn->get_domain_by_name($node);
};
if ($subcommand eq "boot") {
my $currstate=getpowstate($dom);
$retstring=$currstate." ";
if ($currstate eq "off") {
$subcommand="on";
} elsif ($currstate eq "on") {
$subcommand="reset";
}
}
my $errstr;
if ($subcommand eq 'on') {
unless ($dom) {
($dom,$errstr) = makedom($node);
if ($errstr) { return (1,$errstr); }
} else {
$retstring .= " $status_noop";
}
} elsif ($subcommand eq 'off') {
if ($dom) {
$dom->destroy();
} else { $retstring .= " $status_noop"; }
} elsif ($subcommand eq 'softoff') {
if ($dom) {
$dom->shutdown();
} else { $retstring .= " $status_noop"; }
} elsif ($subcommand eq 'reset') {
if ($dom) {
$dom->destroy();
($dom,$errstr) = makedom($node);
if ($errstr) { return (1,$errstr); }
$retstring.="reset";
} else { $retstring .= " $status_noop"; }
} else {
unless ($subcommand =~ /^stat/) {
return (1,"Unsupported power directive '$subcommand'");
}
}
unless ($retstring =~ /reset/) {
$retstring=getpowstate($dom).$retstring;
}
return (0,$retstring);
}
sub guestcmd {
$hyp = shift;
$node = shift;
my $command = shift;
my @args = @_;
my $error;
if ($command eq "rpower") {
return power(@args);
} elsif ($command eq "rmigrate") {
return migrate($node,@args);
} elsif ($command eq "getrvidparms") {
return getrvidparms($node,@args);
} elsif ($command eq "getxencons") {
return getvmcons($node,@args);
}
=cut
} elsif ($command eq "rvitals") {
return vitals(@args);
} elsif ($command =~ /r[ms]preset/) {
return resetmp(@args);
} elsif ($command eq "rspconfig") {
return mpaconfig($mpa,$user,$pass,$node,$slot,@args);
} elsif ($command eq "rbootseq") {
return bootseq(@args);
} elsif ($command eq "switchblade") {
return switchblade(@args);
} elsif ($command eq "getmacs") {
return getmacs(@args);
} elsif ($command eq "rinv") {
return inv(@args);
} elsif ($command eq "reventlog") {
return eventlog(@args);
} elsif ($command eq "rscan") {
return rscan(\@args);
}
=cut
return (1,"$command not a supported command by xen method");
}
sub preprocess_request {
my $request = shift;
if ($request->{_xcatdest}) { return [$request]; } #exit if preprocessed
my $callback=shift;
unless ($libvirtsupport) { #Try to see if conditions changed since last check (no xCATd restart for it to take effect)
$libvirtsupport = eval { require Sys::Virt; };
}
unless ($libvirtsupport) { #Still no Sys::Virt module
$callback->({error=>"Sys::Virt perl module missing, unable to fulfill Xen plugin requirements",errorcode=>[42]});
return [];
}
require Sys::Virt::Domain;
%runningstates = (&Sys::Virt::Domain::STATE_NOSTATE=>1,&Sys::Virt::Domain::STATE_RUNNING=>1,&Sys::Virt::Domain::STATE_BLOCKED=>1);
my @requests;
my $noderange = $request->{node}; #Should be arrayref
my $command = $request->{command}->[0];
my $extrargs = $request->{arg};
my @exargs=($request->{arg});
if (ref($extrargs)) {
@exargs=@$extrargs;
}
my $usage_string=xCAT::Usage->parseCommand($command, @exargs);
if ($usage_string) {
$callback->({data=>$usage_string});
$request = {};
return;
}
if (!$noderange) {
$usage_string=xCAT::Usage->getUsage($command);
$callback->({data=>$usage_string});
$request = {};
return;
}
#print "noderange=@$noderange\n";
# find service nodes for requested nodes
# build an individual request for each service node
my $service = "xcat";
my $sn = xCAT::Utils->get_ServiceNode($noderange, $service, "MN");
# build each request for each service node
foreach my $snkey (keys %$sn)
{
#print "snkey=$snkey\n";
my $reqcopy = {%$request};
$reqcopy->{node} = $sn->{$snkey};
$reqcopy->{'_xcatdest'} = $snkey;
push @requests, $reqcopy;
}
return \@requests;
}
sub adopt {
#TODO: adopt orphans into suitable homes if possible
return 0;
}
sub grab_table_data{ #grab table data relevent to VM guest nodes
my $noderange=shift;
my $callback=shift;
$vmtab = xCAT::Table->new("vm");
$hmtab = xCAT::Table->new("nodehm");
if ($hmtab) {
$hmhash = $hmtab->getNodesAttribs($noderange,['serialspeed']);
}
unless ($vmtab) {
$callback->({data=>["Cannot open vm table"]});
return;
}
$vmhash = $vmtab->getNodesAttribs($noderange,['node','host','migrationdest','storage','memory','cpu','nics','bootorder','virtflags']);
$mactab = xCAT::Table->new("mac",-create=>1);
$nrtab= xCAT::Table->new("noderes",-create=>1);
$machash = $mactab->getNodesAttribs($noderange,['mac']);
}
sub process_request {
$SIG{INT} = $SIG{TERM} = sub {
foreach (keys %vm_comm_pids) {
kill 2, $_;
}
exit 0;
};
my $request = shift;
my $callback = shift;
$doreq = shift;
my $level = shift;
my $noderange = $request->{node};
my $command = $request->{command}->[0];
my @exargs;
unless ($command) {
return; #Empty request
}
if (ref($request->{arg})) {
@exargs = @{$request->{arg}};
} else {
@exargs = ($request->{arg});
}
if ($command eq 'revacuate') {
my $newnoderange;
foreach (@$noderange) {
$hypconn=undef;
push @destblacklist,$_;
eval { #Contain bugs that won't be in $@
$hypconn= Sys::Virt->new(uri=>"xen+ssh://".$_."?no_tty=1&netcat=nc");
};
unless ($hypconn) { #retry for socat
eval { #Contain bugs that won't be in $@
$hypconn= Sys::Virt->new(uri=>"xen+ssh://".$_."?no_tty=1");
};
}
unless ($hypconn) {
$callback->({node=>[{name=>[$_],error=>["Cannot communicate BC via libvirt to node"]}]});
next;
}
foreach ($hypconn->list_domains()) {
my $guestname = $_->get_name();
if ($guestname eq 'Domain-0') {
next;
}
push @$newnoderange,$guestname;
}
}
$hypconn=undef;
$noderange = $newnoderange;
$command = 'rmigrate';
}
grab_table_data($noderange,$callback);
if ($command eq 'revacuate' or $command eq 'rmigrate') {
$vmmaxp=1; #for now throttle concurrent migrations, requires more sophisticated heuristics to ensure sanity
} else {
my $sitetab = xCAT::Table->new('site');
my $tmp;
if ($sitetab) {
($tmp)=$sitetab->getAttribs({'key'=>'vmmaxp'},'value');
if (defined($tmp)) { $vmmaxp=$tmp->{value}; }
}
}
my $children = 0;
$SIG{CHLD} = sub { my $cpid; while ($cpid = waitpid(-1, WNOHANG) > 0) { delete $vm_comm_pids{$cpid}; $children--; } };
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;
}
#get new node status
my %nodestat=();
my $check=0;
my $newstat;
if ($command eq 'rpower') {
my $subcommand=$exargs[0];
if (($subcommand ne 'stat') && ($subcommand ne 'status')) {
$check=1;
my @allnodes=@$noderange;
if ($subcommand eq 'off') { $newstat=$::STATUS_POWERING_OFF; }
else { $newstat=$::STATUS_BOOTING;}
foreach (@allnodes) { $nodestat{$_}=$newstat; }
if ($subcommand ne 'off') {
#get the current nodeset stat
if (@allnodes>0) {
my $nsh={};
my ($ret, $msg)=xCAT::Utils->getNodesetStates(\@allnodes, $nsh);
if (!$ret) {
foreach (keys %$nsh) {
my $currstate=$nsh->{$_};
$nodestat{$_}=xCAT_monitoring::monitorctrl->getNodeStatusFromNodesetState($currstate, "rpower");
}
}
}
}
}
}
#foreach (keys %nodestat) { print "node=$_,status=" . $nodestat{$_} ."\n"; } #Ling:remove
foreach $hyp (sort (keys %hyphash)) {
while ($children > $vmmaxp) {
my $errornodes={};
forward_data($callback,$sub_fds,$errornodes);
#update the node status to the nodelist.status table
if ($check) {
updateNodeStatus(\%nodestat, $errornodes);
}
}
$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) {
my $errornodes={};
forward_data($callback,$sub_fds,$errornodes);
#update the node status to the nodelist.status table
if ($check) {
updateNodeStatus(\%nodestat, $errornodes);
}
}
#Make sure they get drained, this probably is overkill but shouldn't hurt
my $rc=1;
while ( $rc>0 ) {
my $errornodes={};
$rc=forward_data($callback,$sub_fds,$errornodes);
#update the node status to the nodelist.status table
if ($check) {
updateNodeStatus(\%nodestat, $errornodes);
}
}
}
sub updateNodeStatus {
my $nodestat=shift;
my $errornodes=shift;
my %node_status=();
foreach my $node (keys(%$errornodes)) {
if ($errornodes->{$node} == -1) { next;} #has error, not updating status
my $stat=$nodestat->{$node};
if (exists($node_status{$stat})) {
my $pa=$node_status{$stat};
push(@$pa, $node);
}
else {
$node_status{$stat}=[$node];
}
}
xCAT_monitoring::monitorctrl::setNodeStatusAttributes(\%node_status, 1);
}
sub forward_data {
my $callback = shift;
my $fds = shift;
my $errornodes=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) {
#save the nodes that has errors and the ones that has no-op for use by the node status monitoring
my $no_op=0;
if ($_->{node}->[0]->{errorcode}) { $no_op=1; }
else {
my $text=$_->{node}->[0]->{data}->[0]->{contents}->[0];
#print "data:$text\n";
if (($text) && ($text =~ /$status_noop/)) {
$no_op=1;
#remove the symbols that meant for use by node status
$_->{node}->[0]->{data}->[0]->{contents}->[0] =~ s/ $status_noop//;
}
}
#print "data:". $_->{node}->[0]->{data}->[0]->{contents}->[0] . "\n";
if ($no_op) {
if ($errornodes) { $errornodes->{$_->{node}->[0]->{name}->[0]}=-1; }
} else {
if ($errornodes) { $errornodes->{$_->{node}->[0]->{name}->[0]}=1; }
}
$callback->($_);
}
} 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;
$vmtab = xCAT::Table->new("vm");
eval { #Contain Sys::Virt bugs that make $@ useless
$hypconn= Sys::Virt->new(uri=>"xen+ssh://".$hyp."?no_tty=1&netcat=nc");
};
unless ($hypconn) {
eval { #Contain Sys::Virt bugs that make $@ useless
$hypconn= Sys::Virt->new(uri=>"xen+ssh://".$hyp."?no_tty=1");
};
}
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;
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