#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
package xCAT_plugin::kvm;
BEGIN
{
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
}
use lib "$::XCATROOT/lib/perl";
use xCAT::GlobalDef;
use xCAT::NodeRange;
use xCAT::VMCommon;
use xCAT_monitoring::monitorctrl;
use xCAT::Table;
use XML::Simple qw(XMLout);
use Thread qw(yield);
use File::Basename qw/fileparse/;
use File::Path qw/mkpath/;
use IO::Socket;
use IO::Select;
use strict;
#use warnings;
my $use_xhrm=0; #xCAT Hypervisor Resource Manager, to satisfy networking and storage prerequisites, default to not using it for the moment
my $imgfmt='raw'; #use raw format by default
my $clonemethod='qemu-img'; #use qemu-img command
my %vm_comm_pids;
my %offlinehyps;
my %hypstats;
my %offlinevms;
my @destblacklist;
my $updatetable; #when a function is performing per-node operations, it can queue up a table update by populating parts of this hash
my $confdata; #a reference to serve as a common pointer betweer VMCommon functions and this plugin
my $libvirtsupport;
$libvirtsupport = eval {
require Sys::Virt;
if (Sys::Virt->VERSION < "0.2.0") {
die;
}
1;
};
use XML::Simple;
$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 xCAT::DBobjUtils;
use Getopt::Long;
use xCAT::SvrUtils;
my %runningstates;
my $vmmaxp=64;
my $mactab;
my %usedmacs;
my $status_noop="XXXno-opXXX";
sub handled_commands {
#unless ($libvirtsupport) {
# return {};
#}
return {
rpower => 'nodehm:power,mgt',
mkvm => 'nodehm:power,mgt',
rmigrate => 'nodehm:mgt',
getcons => 'nodehm:mgt',
#rvitals => 'nodehm:mgt',
#rinv => 'nodehm:mgt',
getrvidparms => 'nodehm:mgt',
rbeacon => 'nodehm:mgt',
revacuate => 'hypervisor:type',
vmstatenotify => 'hypervisor:type',
#rspreset => 'nodehm:mgt',
#rspconfig => 'nodehm:mgt',
#rbootseq => 'nodehm:mgt',
#reventlog => 'nodehm:mgt',
};
}
my $hypconn;
my $hyp;
my $doreq;
my %hyphash;
my $node;
my $vmtab;
sub get_path_for_nfsuri {
my $diskname = shift;
$diskname =~ /nfs:\/\/([^\/]*)(\/.*)/;
my $server = $1;
my $path = $2;
print $diskname." $server $path \n";
if (xCAT::Utils::thishostisnot($server)) {
return [$server,$path];
} else { #I am the server
return $path;
}
}
sub nodesockopen {
my $node = shift;
my $port = shift;
unless ($node) { return 0; }
my $socket;
my $addr = gethostbyname($node);
my $sin = sockaddr_in($port,$addr);
my $proto = getprotobyname('tcp');
socket($socket,PF_INET,SOCK_STREAM,$proto) || return 0;
connect($socket,$sin) || return 0;
return 1;
}
sub waitforack {
my $sock = shift;
my $select = new IO::Select;
$select->add($sock);
my $str;
if ($select->can_read(60)) { # 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';
if (defined $confdata->{vm}->{$node}->[0]->{bootorder}) {
my $bootorder = $confdata->{vm}->{$node}->[0]->{bootorder};
my @bootdevs = split(/[:,]/,$bootorder);
my $bootnum = 0;
foreach (@bootdevs) {
if ("net" eq $_ or "n" eq $_) {
$rethash{boot}->[$bootnum]->{dev}="network";
} else {
$rethash{boot}->[$bootnum]->{dev}=$_;
}
$bootnum++;
}
} else {
$rethash{boot}->[0]->{dev}='network';
$rethash{boot}->[1]->{dev}='hd';
}
return \%rethash;
}
sub build_diskstruct {
my $cdloc=shift;
my @returns=();
my $currdev;
my @suffixes=('a','b','d'..'z');
my $suffidx=0;
if ($cdloc) {
my $cdhash;
$cdhash->{device}='cdrom';
if ($cdloc =~ /^\/dev/) {
$cdhash->{type}='block';
} else {
$cdhash->{type}='file';
}
$cdhash->{source}->{file}=$cdloc;
$cdhash->{readonly};
$cdhash->{target}->{dev}='hdc';
push @returns,$cdhash;
}
if (defined $confdata->{vm}->{$node}->[0]->{storage}) {
my $disklocs=$confdata->{vm}->{$node}->[0]->{storage};
my @locations=split /\|/,$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);
} elsif ($disk_parts[0] =~ m/^nfs:\/\/(.*)$/) {
$diskhash->{source}->{file} = "/var/lib/xcat/vmnt/nfs_".$1."/$node/".$diskhash->{target}->{dev};
} 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.
#evidently, we support specificying explicitly how to target the system..
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 $node = shift;
my @macs=();
my @nics=();
if ($confdata->{vm}->{$node}->[0]->{nics}) {
@nics = split /,/,$confdata->{vm}->{$node}->[0]->{nics};
} else {
@nics = ('virbr0');
}
if ($confdata->{mac}->{$node}->[0]->{mac}) {
my $macdata=$confdata->{mac}->{$node}->[0]->{mac};
foreach my $macaddr (split /\|/,$macdata) {
$macaddr =~ s/\!.*//;
push @macs,$macaddr;
}
}
unless (scalar(@macs) >= scalar(@nics)) {
#TODO: MUST REPLACE WITH VMCOMMON CODE
my $neededmacs=scalar(@nics) - scalar(@macs);
my $macstr;
my $tmac;
my $leading;
srand;
while ($neededmacs--) {
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
$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));
}
$tmac = sprintf("%04x%08x",$leading,$tail);
$tmac =~ s/(..)(..)(..)(..)(..)(..)/$1:$2:$3:$4:$5:$6/;
if ($usedmacs{$tmac}) { #If we have a collision we can actually perceive, retry the generation of this mac
$neededmacs++;
next;
}
$usedmacs{$tmac}=1;
push @macs,$tmac;
}
#$mactab->setNodeAttribs($node,{mac=>join('|',@macs)});
#$nrtab->setNodeAttribs($node,{netboot=>'pxe'});
#$doreq->({command=>['makedhcp'],node=>[$node]});
}
my @rethashes;
foreach (@macs) {
my $rethash;
my $nic = shift @nics;
my $type = 'e1000'; #better default fake nic than rtl8139, relevant to most
unless ($nic) {
last; #Don't want to have multiple vnics tied to the same switch
}
$nic =~ s/.*://; #the detail of how the bridge was built is of no
#interest to this segment of code
if ($nic =~ /=/) {
($nic,$type) = split /=/,$nic,2;
}
$rethash->{type}='bridge';
$rethash->{mac}->{address}=$_;
$rethash->{source}->{bridge}=$nic;
$rethash->{model}->{type}=$type;
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 $cdloc=shift;
my %xtree=();
$xtree{type}='kvm';
$xtree{name}->{content}=$node;
$xtree{uuid}->{content}=getNodeUUID($node);
$xtree{os} = build_oshash();
if (defined $confdata->{vm}->{$node}->[0]->{memory}) {
$xtree{memory}->{content}=getUnits($confdata->{vm}->{$node}->[0]->{memory},"M",1024);
} else {
$xtree{memory}->{content}=524288;
}
if (defined $confdata->{vm}->{$node}->[0]->{cpus}) {
$xtree{vcpu}->{content}=$confdata->{vm}->{$node}->[0]->{cpus};
} else {
$xtree{vcpu}->{content}=1;
}
if (defined ($confdata->{vm}->{$node}->[0]->{clockoffset})) {
#If user requested a specific behavior, give it
$xtree{clock}->{offset}=$confdata->{vm}->{$node}->[0]->{clockoffset};
} else {
#Otherwise, only do local time for things that look MS
if (defined ($confdata->{nodetype}->{$node}->[0]->{os}) and $confdata->{nodetype}->{$node}->[0]->{os} =~ /win.*/) {
$xtree{clock}->{offset}='localtime';
} else { #For everyone else, utc is preferred generally
$xtree{clock}->{offset}='utc';
}
}
$xtree{features}->{pae}={};
$xtree{features}->{acpi}={};
$xtree{features}->{apic}={};
$xtree{features}->{content}="\n";
$xtree{devices}->{disk}=build_diskstruct($cdloc);
$xtree{devices}->{interface}=build_nicstruct($node);
$xtree{devices}->{input}->{type}='tablet';
$xtree{devices}->{input}->{bus}='usb';
$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};
$updatetable->{vm}->{$node}={vncport=>$vncport,textconsole=>$stty};
#$vmtab->setNodeAttribs($node,{vncport=>$vncport,textconsole=>$stty});
return {vncport=>$vncport,textconsole=>$stty};
}
sub getcons {
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 $hyper=$confdata->{vm}->{$node}->[0]->{host};
if ($type eq "text") {
my $serialspeed;
if ($confdata->{nodehm}) {
$serialspeed=$confdata->{nodehm}->{$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") {
return (0,'ssh+vnc@'.$hyper.": localhost:".$consdata->{vncport}); #$consdata->{vncport});
}
}
sub getrvidparms {
my $node=shift;
my $location = getcons($node,"vnc");
if ($location =~ /ssh\+vnc@([^:]*):([^:]*):(\d+)/) {
my @output = (
"method: kvm",
"server: $1",
"vncdisplay: $2:$3",
"virturi: ".$hypconn->get_uri(),
"virtname: $node",
);
return 0,@output;
} else {
return (1,"Error: Unable to determine rvid destination for $node");
}
}
sub pick_target {
my $node = shift;
my $addmemory = shift;
my $target;
my $mostfreememory=undef;
my $currentfreememory;
my $candidates= $confdata->{vm}->{$node}->[0]->{migrationdest};
my $currhyp=$confdata->{vm}->{$node}->[0]->{host};
unless ($candidates) {
return undef;
}
foreach (noderange($candidates)) {
my $targconn;
my $cand=$_;
if ($_ eq $currhyp) { next; } #skip current node
if ($offlinehyps{$_}) { next }; #skip already offlined nodes
if (grep { "$_" eq $cand } @destblacklist) { next; } #skip blacklisted destinations
if (defined $hypstats{$_}->{freememory}) {
$currentfreememory=$hypstats{$_}->{freememory}
} else {
if (not nodesockopen($_,22)) { $offlinehyps{$_}=1; next; } #skip unusable destinations
eval { #Sys::Virt has bugs that cause it to die out in weird ways some times, contain it here
$targconn = Sys::Virt->new(uri=>"qemu+ssh://root@".$_."/system?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
$targconn = Sys::Virt->new(uri=>"qemu+ssh://root@".$_."/system?no_tty=1");
};
}
unless ($targconn) { next; } #skip unreachable destinations
$currentfreememory=$targconn->get_node_info()->{memory};
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
$currentfreememory -= $_->get_info()->{memory};
}
$hypstats{$cand}->{freememory}=$currentfreememory;
}
if ($addmemory and $addmemory->{$_}) {
$currentfreememory -= $addmemory->{$_};
}
if (not defined ($mostfreememory)) {
$mostfreememory=$currentfreememory;
$target=$_;
} elsif ($currentfreememory > $mostfreememory) {
$mostfreememory=$currentfreememory;
$target=$_;
}
}
return $target;
}
sub migrate {
$node = shift();
my $targ = shift();
if ($offlinevms{$node}) {
return power("on");
}
unless ($targ) {
$targ = pick_target($node);
}
unless ($targ) {
return (1,"Unable to identify a suitable target host for guest $node");
}
if ($use_xhrm) {
xhrm_satisfy($node,$targ);
}
my $prevhyp;
my $target = "qemu+ssh://root@".$targ."/system?no_tty=1";
my $currhyp="qemu+ssh://root@";
if ($confdata->{vm}->{$node}->[0]->{host}) {
$prevhyp=$confdata->{vm}->{$node}->[0]->{host};
$currhyp.=$prevhyp;
} else {
return (1,"Unable to find current location of $node");
}
$currhyp.="/system?no_tty=1";
if ($currhyp eq $target) {
return (0,"Guest is already on host $targ");
}
my $srchypconn;
my $desthypconn;
unless ($offlinehyps{$prevhyp} or nodesockopen($prevhyp,22)) {
$offlinehyps{$prevhyp}=1;
}
my $srcnetcatadd="&netcat=nc";
unless ($offlinehyps{$prevhyp}) {
eval {#Contain Sys::Virt bugs
$srchypconn= Sys::Virt->new(uri=>"qemu+ssh://root@".$prevhyp."/system?no_tty=1$srcnetcatadd");
};
unless ($srchypconn) {
$srcnetcatadd="";
eval {#Contain Sys::Virt bugs
$srchypconn= Sys::Virt->new(uri=>"qemu+ssh://root@".$prevhyp."/system?no_tty=1");
};
}
}
unless ($srchypconn) {
return (1,"Unable to reach $prevhyp to perform operation of $node, use nodech to change vm.host if certain of no split-brain possibility exists");
}
unless ($offlinehyps{$targ} or nodesockopen($targ,22)) {
$offlinehyps{$targ}=1;
}
my $destnetcatadd="&netcat=nc";
unless ($offlinehyps{$targ}) {
eval {#Contain Sys::Virt bugs
$desthypconn= Sys::Virt->new(uri=>$target.$destnetcatadd);
};
unless ($desthypconn) {
$destnetcatadd="";
eval {#Contain Sys::Virt bugs
$desthypconn= Sys::Virt->new(uri=>$target);
};
}
}
unless ($desthypconn) {
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 $nomadomain;
eval {
$nomadomain = $srchypconn->get_domain_by_name($node);
};
unless ($nomadomain) {
return (1,"Unable to find $node on $prevhyp, vm.host may be incorrect or a split-brain condition, such as libvirt forgetting a guest due to restart or bug.");
}
my $newdom;
my $errstr;
eval {
$newdom=$nomadomain->migrate($desthypconn,&Sys::Virt::Domain::MIGRATE_LIVE,undef,undef,0);
};
if ($@) { $errstr = $@; }
#TODO: If it looks like it failed to migrate, ensure the guest exists only in one place
if ($errstr) {
return (1,"Failed migration of $node from $prevhyp to $targ: $errstr");
}
unless ($newdom) {
return (1,"Failed migration from $prevhyp to $targ");
}
system("arp -d $node"); #Make ethernet fabric take note of change
send($sock,"dummy",0,$pa); #UDP packet to force forwarding table update in switches, ideally a garp happened, but just in case...
#BTW, this should all be moot since the underlying kvm seems good about gratuitous traffic, but it shouldn't hurt anything
refresh_vm($newdom);
#The migration seems tohave suceeded, but to be sure...
close($sock);
if ($desthypconn->get_domain_by_name($node)) {
$updatetable->{vm}->{$node}->{host} = $targ;
#$vmtab->setNodeAttribs($node,{host=>$targ});
return (0,"migrated to $targ");
} else { #This *should* not be possible
return (1,"Failed migration from $prevhyp to $targ, despite normal looking run...");
}
}
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 xhrm_satisfy {
my $node = shift;
my $hyp = shift;
my $rc=0;
my @nics=();
my @storage=();
if ($confdata->{vm}->{$node}->[0]->{nics}) {
@nics = split /,/,$confdata->{vm}->{$node}->[0]->{nics};
}
if ($confdata->{vm}->{$node}->[0]->{storage}) {
@storage = split /\|/,$confdata->{vm}->{$node}->[0]->{storage};
}
foreach (@nics) {
s/=.*//; #this code cares not about the model of virtual nic
$rc |=system("ssh $hyp xHRM bridgeprereq $_");
}
foreach (@storage) {
if (/^nfs:\/\//) {
$rc |= system("ssh $hyp xHRM storageprereq $_");
}
}
return $rc;
}
sub makedom {
my $node=shift;
my $cdloc = shift;
my $dom;
my $xml=build_xmldesc($node,$cdloc);
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 createstorage {
my $filename=shift;
my $mastername=shift;
my $size=shift;
my $cfginfo = shift;
my $force = shift;
my $diskstruct = shift;
my $node = $cfginfo->{node};
my @flags = split /,/,$cfginfo->{virtflags};
foreach (@flags) {
if (/^imageformat=(.*)\z/) {
$imgfmt=$1;
} elsif (/^clonemethod=(.*)\z/) {
$clonemethod=$1;
}
}
my $mountpath;
my $pathappend;
my $storageserver;
#for nfs paths and qemu-img, we do the magic locally only for now
my $basename;
my $dirname;
if ($filename =~ /^nfs:/) {
$filename = get_path_for_nfsuri($filename);
if (ref $filename) { #if we got a reference back instead of a string, it is a remote location
$storageserver = $filename->[0];
$filename = $filename->[1];
}
$filename =~ s/\/$//;
$mountpath = $filename;
$filename .= "/$node/".fileparse($diskstruct->[0]->{source}->{file});
$pathappend = "/$node/";
}
($basename,$dirname) = fileparse($filename);
unless ($storageserver) {
if (-f $filename) {
unless ($force) {
return 1,"Storage already exists, delete manually or use --force";
}
unlink $filename;
}
}
if ($storageserver and $mastername and $clonemethod eq 'reflink') {
my $rc=system("ssh $storageserver mkdir -p $dirname");
if ($rc) {
return 1,"Unable to manage storage on remote server $storageserver";
}
} elsif ($storageserver) {
my @mounts = `mount`;
my $foundmount;
foreach (@mounts) {
if (/^$storageserver:$mountpath/) {
chomp;
s/^.* on (\S*) type nfs.*$/$1/;
$dirname = $_;
mkpath($dirname.$pathappend);
$foundmount=1;
last;
}
}
unless ($foundmount) {
return 1,"qemu-img cloning requires that the management server have the directory $mountpath from $storageserver mounted";
}
} else {
mkpath($dirname);
}
if ($mastername and $size) {
return 1,"Can not specify both a master to clone and a size";
}
my $masterserver;
if ($mastername) {
unless ($mastername =~ /^\// or $mastername =~ /^nfs:/) {
$mastername = $xCAT_plugin::kvm::masterdir.'/'.$mastername;
}
if ($mastername =~ m!nfs://([^/]*)(/.*\z)!) {
$mastername = $2;
$masterserver = $1;
}
if ($masterserver ne $storageserver) {
return 1,"Not supporting cloning between $masterserver and $storageserver at this time, for now ensure master images and target VM images are on the same server";
}
my $rc;
if ($clonemethod eq 'qemu-img') {
my $dirn;
my $filn;
($filn,$dirn) = fileparse($filename);
chdir($dirn);
$rc=system("qemu-img create -f qcow2 -b $mastername $filename");
} elsif ($clonemethod eq 'reflink') {
if ($storageserver) {
$rc=system("ssh $storageserver cp --reflink $mastername $filename");
} else {
$rc=system("cp --reflink $mastername $filename");
}
}
if ($rc) {
return $rc,"Failure creating image $filename from $mastername";
}
}
if ($size) {
my $rc = system("qemu-img create -f $imgfmt $filename ".getUnits($size,"g",1024));
if ($rc) {
return $rc,"Failure creating image $filename of size $size\n";
}
}
}
sub mkvm {
shift; #Throuw away first argument
@ARGV=@_;
my $disksize;
my $mastername;
my $force=0;
require Getopt::Long;
GetOptions(
'master|m=s'=>\$mastername,
'size|s=s'=>\$disksize,
'force|f'=>\$force
);
build_xmldesc($node);
my $diskstruct = build_diskstruct();
if (defined $confdata->{vm}->{$node}->[0]->{storage}) {
my $diskname=$confdata->{vm}->{$node}->[0]->{storage};
if ($diskname =~ /^phy:/) { #in this case, mkvm should have no argumens
if ($mastername or $disksize) {
return 1,"mkvm management of block device storage not implemented";
}
}
if ($mastername or $disksize) {
return createstorage($diskname,$mastername,$disksize,$confdata->{vm}->{$node}->[0],$force,$diskstruct);
}
} else {
if ($mastername or $disksize) {
return 1,"Requested initialization of storage, but vm.storage has no value for node";
}
}
}
sub power {
@ARGV=@_;
require Getopt::Long;
my $cdloc;
GetOptions('cdrom|iso|c|i=s'=>\$cdloc);
my $subcommand = shift @ARGV;
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 ($dom) {
if ($use_xhrm) {
if (xhrm_satisfy($node,$hyp)) {
return (1,"Failure satisfying networking and storage requirements on $hyp for $node");
}
}
($dom,$errstr) = makedom($node,$cdloc);
if ($errstr) { return (1,$errstr); }
} else {
$retstring .= "$status_noop";
}
} elsif ($subcommand eq 'off') {
if ($dom) {
$dom->destroy();
undef $dom;
} else { $retstring .= "$status_noop"; }
} elsif ($subcommand eq 'softoff') {
if ($dom) {
$dom->shutdown();
} else { $retstring .= "$status_noop"; }
} elsif ($subcommand eq 'reset') {
if ($dom) {
$dom->destroy();
undef $dom;
if ($use_xhrm) {
xhrm_satisfy($node,$hyp);
}
($dom,$errstr) = makedom($node,$cdloc);
if ($errstr) { return (1,$errstr); }
$retstring.="reset";
} else { $retstring .= "$status_noop"; }
} else {
unless ($subcommand =~ /^stat/) {
return (1,"Unsupported power directive '$subcommand'");
}
}
unless ($retstring =~ /reset/) {
$retstring=$retstring.getpowstate($dom);
}
return (0,$retstring);
}
sub guestcmd {
$hyp = shift;
$node = shift;
my $command = shift;
my @args = @_;
my $error;
if ($command eq "rpower") {
return power(@args);
} elsif ($command eq "mkvm") {
return mkvm($node,@args);
} elsif ($command eq "rmigrate") {
return migrate($node,@args);
} elsif ($command eq "getrvidparms") {
return getrvidparms($node,@args);
} elsif ($command eq "getcons") {
return getcons($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 kvm method");
}
sub preprocess_request {
my $request = shift;
if ($request->{_xcatpreprocessed}->[0] == 1) { return [$request]; }
my $callback=shift;
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;
$reqcopy->{_xcatpreprocessed}->[0] = 1;
push @requests, $reqcopy;
}
return \@requests;
}
sub adopt {
my $orphash = shift;
my $hyphash = shift;
my %addmemory = ();
my $node;
my $target;
my $vmupdates;
foreach $node (keys %{$orphash}) {
$target=pick_target($node,\%addmemory);
unless ($target) {
next;
}
if ($confdata->{vm}->{$node}->[0]->{memory}) {
$addmemory{$target}+=getUnits($confdata->{vm}->{$node}->[0]->{memory},"M",1024);
} else {
$addmemory{$target}+=getUnits("512","M",1024);
}
$hyphash{$target}->{nodes}->{$node}=1;
delete $orphash->{$node};
$vmupdates->{$node}->{host}=$target;
}
$vmtab->setNodesAttribs($vmupdates);
if (keys %{$orphash}) {
return 0;
} else {
return 1;
}
}
#TODO: adopt orphans into suitable homes if possible
# return 0;
#}
sub process_request {
$SIG{INT} = $SIG{TERM} = sub {
foreach (keys %vm_comm_pids) {
kill 2, $_;
}
exit 0;
};
%offlinehyps=();
%hypstats=();
%offlinevms=();
my $request = shift;
my $callback = shift;
unless ($libvirtsupport) {
$libvirtsupport = eval {
require Sys::Virt;
if (Sys::Virt->VERSION < "0.2.0") {
die;
}
1;
};
}
unless ($libvirtsupport) { #Still no Sys::Virt module
$callback->({error=>"Sys::Virt perl module missing or older than 0.2.0, unable to fulfill KVM 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);
$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});
}
my $forcemode = 0;
my %orphans=();
if ($command eq 'vmstatenotify') {
unless ($vmtab) { $vmtab = new xCAT::Table('vm',-create=>1); }
my $state = $exargs[0];
if ($state eq 'vmoff') {
$vmtab->setNodeAttribs($exargs[1],{powerstate=>'off'});
print "Completion?\n";
return;
} elsif ($state eq 'vmon') {
print "Completion?\n";
$vmtab->setNodeAttribs($exargs[1],{powerstate=>'on'});
return;
} elsif ($state eq 'hypshutdown') { #turn this into an evacuate
my $nodelisttab = xCAT::Table->new('nodelist');
my $appstatus = $nodelisttab->getNodeAttribs($noderange->[0],['appstatus']);
my @apps =split /,/,$appstatus->{'appstatus'};
my @newapps;
foreach (@apps) {
if ($_ eq 'virtualization') { next; }
push @newapps,$_;
}
$nodelisttab->setNodeAttribs($noderange->[0],{appstatus=>join(',',@newapps)});
$command="revacuate";
@exargs=();
} elsif ($state eq 'hypstartup') { #if starting up, check for nodes on this hypervisor and start them up
my $nodelisttab = xCAT::Table->new('nodelist');
my $appstatus = $nodelisttab->getNodeAttribs($noderange->[0],['appstatus']);
my @apps =split /,/,$appstatus->{appstatus};
unless (grep {$_ eq 'virtualization'} @apps) {
push @apps,'virtualization';
$nodelisttab->setNodeAttribs($noderange->[0],{appstatus=>join(',',@apps)});
}
my @tents = $vmtab->getAttribs({host=>$noderange->[0],power=>'on'},['node']);
$noderange=[];
foreach (@tents) {
push @$noderange,noderange($_->{node});
}
$command="rpower";
@exargs=("on");
}
}
if ($command eq 'revacuate') {
my $newnoderange;
if (grep { $_ eq '-f' } @exargs) {
$forcemode=1;
}
foreach (@$noderange) {
my $hyp = $_; #I used $_ too much here... sorry
$hypconn=undef;
push @destblacklist,$_;
if ((not $offlinehyps{$_}) and nodesockopen($_,22)) {
eval { #Contain bugs that won't be in $@
$hypconn= Sys::Virt->new(uri=>"qemu+ssh://root@".$_."/system?no_tty=1&netcat=nc");
};
unless ($hypconn) { #retry for socat
eval { #Contain bugs that won't be in $@
$hypconn= Sys::Virt->new(uri=>"qemu+ssh://root@".$_."/system?no_tty=1");
};
}
}
unless ($hypconn) {
$offlinehyps{$hyp}=1;
if ($forcemode) { #forcemode indicates the hypervisor is probably already dead, and to clear vm.host of all the nodes, and adopt the ones that are supposed to be 'on', power them on
unless ($vmtab) { $vmtab = new xCAT::Table('vm',-create=>0); }
unless ($vmtab) { next; }
my @vents = $vmtab->getAttribs({host=>$hyp},['node','powerstate']);
my $vent;
my $nodestozap;
foreach $vent (@vents) {
my @nodes = noderange($vent->{node});
if ($vent->{powerstate} eq 'on') {
foreach (@nodes) {
$offlinevms{$_}=1;
$orphans{$_}=1;
push @$newnoderange,$_;
}
}
push @$nodestozap,@nodes;
}
$vmtab->setNodesAttribs($nodestozap,{host=>'|^.*$||'});
} else {
$callback->({node=>[{name=>[$_],error=>["Cannot communicate via libvirt to node"]}]});
}
next;
}
if ($hypconn) {
foreach ($hypconn->list_domains()) {
my $guestname = $_->get_name();
if ($guestname eq 'Domain-0') {
next;
}
push @$newnoderange,$guestname;
}
}
}
$hypconn=undef;
$noderange = $newnoderange;
$command = 'rmigrate';
}
my $sitetab = xCAT::Table->new('site');
if ($sitetab) {
my $xhent = $sitetab->getAttribs({key=>'usexhrm'},['value']);
if ($xhent and $xhent->{value} and $xhent->{value} !~ /no/i and $xhent->{value} !~ /disable/i) {
$use_xhrm=1;
}
}
$vmtab = xCAT::Table->new("vm");
$confdata={};
xCAT::VMCommon::grab_table_data($noderange,$confdata,$callback);
if ($command eq 'mkvm' or $command eq 'rpower' and (grep { "$_" eq "on" or $_ eq "boot" or $_ eq "reset" } @exargs)) {
xCAT::VMCommon::requestMacAddresses($confdata,$noderange);
my @dhcpnodes;
foreach (keys %{$confdata->{dhcpneeded}}) {
push @dhcpnodes,$_;
delete $confdata->{dhcpneeded}->{$_};
}
$doreq->({command=>['makedhcp'],node=>\@dhcpnodes});
}
if ($command eq 'revacuate' or $command eq 'rmigrate') {
$vmmaxp=1; #for now throttle concurrent migrations, requires more sophisticated heuristics to ensure sanity
} else {
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) { if ($vm_comm_pids{$cpid}) { delete $vm_comm_pids{$cpid}; $children--; } } };
my $inputs = new IO::Select;;
my $sub_fds = new IO::Select;
%hyphash=();
foreach (keys %{$confdata->{vm}}) {
if ($confdata->{vm}->{$_}->[0]->{host}) {
$hyphash{$confdata->{vm}->{$_}->[0]->{host}}->{nodes}->{$_}=1;
} else {
$orphans{$_}=1;
}
}
if (keys %orphans) {
if ($command eq "rpower") {
if (grep /^on$/,@exargs or grep /^boot$/,@exargs) {
unless (adopt(\%orphans,\%hyphash)) {
$callback->({error=>"Can't find ".join(",",keys %orphans),errorcode=>[1]});
return 1;
}
} else {
foreach (keys %orphans) {
$callback->({node=>[{name=>[$_],data=>[{contents=>['off']}]}]});
}
}
} elsif ($command eq "rmigrate") {
if ($forcemode) {
unless (adopt(\%orphans,\%hyphash)) {
$callback->({error=>"Can't find ".join(",",keys %orphans),errorcode=>[1]});
return 1;
}
} else {
$callback->({error=>"Can't find ".join(",",keys %orphans),errorcode=>[1]});
return;
}
} elsif ($command eq "mkvm") { #mkvm can happen devoid of any hypervisor, make a fake hypervisor entry to allow this to occur
foreach (keys %orphans) {
$hyphash{'!@!XCATDUMMYHYPERVISOR!@!'}->{nodes}->{$_}=1;
}
} 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 %oldnodestatus=(); #saves the old node status
my @allerrornodes=();
my $check=0;
my $global_check=1;
if ($sitetab) {
(my $ref) = $sitetab->getAttribs({key => 'nodestatus'}, 'value');
if ($ref) {
if ($ref->{value} =~ /0|n|N/) { $global_check=0; }
}
}
if ($command eq 'rpower') {
my $subcommand=$exargs[0];
if (($global_check) && ($subcommand ne 'stat') && ($subcommand ne 'status')) {
$check=1;
my @allnodes=@$noderange;
#save the old status
my $nodelisttab = xCAT::Table->new('nodelist');
if ($nodelisttab) {
my $tabdata = $nodelisttab->getNodesAttribs(\@allnodes, ['node', 'status']);
foreach my $node (@allnodes)
{
my $tmp1 = $tabdata->{$node}->[0];
if ($tmp1) {
if ($tmp1->{status}) { $oldnodestatus{$node}=$tmp1->{status}; }
else { $oldnodestatus{$node}=""; }
}
}
}
#print "oldstatus:" . Dumper(\%oldnodestatus);
#set the new status to the nodelist.status
my %newnodestatus=();
my $newstat;
if (($subcommand eq 'off') || ($subcommand eq 'softoff')) {
my $newstat=$::STATUS_POWERING_OFF;
$newnodestatus{$newstat}=\@allnodes;
} else {
#get the current nodeset stat
if (@allnodes>0) {
my $nsh={};
my ($ret, $msg)=xCAT::SvrUtils->getNodesetStates(\@allnodes, $nsh);
if (!$ret) {
foreach (keys %$nsh) {
my $newstat=xCAT_monitoring::monitorctrl->getNodeStatusFromNodesetState($_, "rpower");
$newnodestatus{$newstat}=$nsh->{$_};
}
} else {
$callback->({data=>$msg});
}
}
}
#print "newstatus" . Dumper(\%newnodestatus);
xCAT_monitoring::monitorctrl::setNodeStatusAttributes(\%newnodestatus, 1);
}
}
my $sent = $sitetab->getAttribs({key=>'masterimgdir'},'value');
if ($sent) {
$xCAT_plugin::kvm::masterdir=$sent->{value};
}
foreach $hyp (sort (keys %hyphash)) {
while ($children > $vmmaxp) {
my $handlednodes={};
forward_data($callback,$sub_fds,$handlednodes);
#update the node status to the nodelist.status table
if ($check) {
updateNodeStatus($handlednodes, \@allerrornodes);
}
}
$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 $handlednodes={};
forward_data($callback,$sub_fds,$handlednodes);
#update the node status to the nodelist.status table
if ($check) {
updateNodeStatus($handlednodes, \@allerrornodes);
}
}
#Make sure they get drained, this probably is overkill but shouldn't hurt
my $rc=1;
while ( $rc>0 ) {
my $handlednodes={};
$rc=forward_data($callback,$sub_fds,$handlednodes);
#update the node status to the nodelist.status table
if ($check) {
updateNodeStatus($handlednodes, \@allerrornodes);
}
}
if ($check) {
#print "allerrornodes=@allerrornodes\n";
#revert the status back for there is no-op for the nodes
my %old=();
foreach my $node (@allerrornodes) {
my $stat=$oldnodestatus{$node};
if (exists($old{$stat})) {
my $pa=$old{$stat};
push(@$pa, $node);
}
else {
$old{$stat}=[$node];
}
}
xCAT_monitoring::monitorctrl::setNodeStatusAttributes(\%old, 1);
}
}
sub updateNodeStatus {
my $handlednodes=shift;
my $allerrornodes=shift;
foreach my $node (keys(%$handlednodes)) {
if ($handlednodes->{$node} == -1) { push(@$allerrornodes, $node); }
}
}
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>;
}
eval { print $rfh "ACK\n"; }; #ignore failures to send inter-process ack
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;
$vmtab = xCAT::Table->new("vm");
unless ($offlinehyps{$hyp} or ($hyp eq '!@!XCATDUMMYHYPERVISOR!@!') or nodesockopen($hyp,22)) {
$offlinehyps{$hyp}=1;
}
eval { #Contain Sys::Virt bugs that make $@ useless
if ($hyp eq '!@!XCATDUMMYHYPERVISOR!@!') { #Fake connection for commands that have a fake hypervisor key
$hypconn = 1;
} elsif (not $offlinehyps{$hyp}) {
$hypconn= Sys::Virt->new(uri=>"qemu+ssh://root@".$hyp."/system?no_tty=1&netcat=nc");
}
};
unless ($hypconn or $offlinehyps{$hyp}) {
eval { #Contain Sys::Virt bugs that make $@ useless
$hypconn= Sys::Virt->new(uri=>"qemu+ssh://root@".$hyp."/system?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;
$output{node}->[0]->{error} = $text unless $rc == 0;
print $out freeze([\%output]);
print $out "\nENDOFFREEZE6sK4ci\n";
yield();
waitforack($out);
}
yield();
}
foreach (keys %$updatetable) {
my $tabhandle = xCAT::Table->new($_,-create=>1);
$tabhandle->setNodesAttribs($updatetable->{$_});
}
#my $msgtoparent=freeze(\@outhashes); # = XMLout(\%output,RootName => 'xcatresponse');
#print $out $msgtoparent; #$node.": $_\n";
}
1;