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qemu-server: add support for unsecure migration (setting in datacenter.cfg)

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This patch adds support for unsecure migration using a direct tcp connection
KVM <=> KVM instead of an extra SSH tunnel. Without ssh the limit is just the
bandwith and no longer the CPU / one single core.

You can enable this by adding:
migration_unsecure: 1
to datacenter.cfg

Examples using qemu 1.4 as migration with qemu 1.3 still does not work for me:

current default with SSH Tunnel VM uses 2GB mem:
Dec 27 21:10:32 starting migration of VM 105 to node 'cloud1-1202' (10.255.0.20)
Dec 27 21:10:32 copying disk images
Dec 27 21:10:32 starting VM 105 on remote node 'cloud1-1202'
Dec 27 21:10:35 starting ssh migration tunnel
Dec 27 21:10:36 starting online/live migration on localhost:60000
Dec 27 21:10:36 migrate_set_speed: 8589934592
Dec 27 21:10:36 migrate_set_downtime: 1
Dec 27 21:10:38 migration status: active (transferred 152481002, remaining 1938546688), total 2156396544) , expected downtime 0
Dec 27 21:10:40 migration status: active (transferred 279836995, remaining 1811140608), total 2156396544) , expected downtime 0
Dec 27 21:10:42 migration status: active (transferred 421265271, remaining 1669840896), total 2156396544) , expected downtime 0
Dec 27 21:10:44 migration status: active (transferred 570987974, remaining 1520152576), total 2156396544) , expected downtime 0
Dec 27 21:10:46 migration status: active (transferred 721469404, remaining 1369939968), total 2156396544) , expected downtime 0
Dec 27 21:10:48 migration status: active (transferred 875595258, remaining 1216057344), total 2156396544) , expected downtime 0
Dec 27 21:10:50 migration status: active (transferred 1034654822, remaining 1056931840), total 2156396544) , expected downtime 0
Dec 27 21:10:54 migration status: active (transferred 1176288424, remaining 915369984), total 2156396544) , expected downtime 0
Dec 27 21:10:56 migration status: active (transferred 1339734759, remaining 752050176), total 2156396544) , expected downtime 0
Dec 27 21:10:58 migration status: active (transferred 1503743261, remaining 588206080), total 2156396544) , expected downtime 0
Dec 27 21:11:02 migration status: active (transferred 1645097827, remaining 446906368), total 2156396544) , expected downtime 0
Dec 27 21:11:04 migration status: active (transferred 1810562934, remaining 281751552), total 2156396544) , expected downtime 0
Dec 27 21:11:06 migration status: active (transferred 1964377505, remaining 126033920), total 2156396544) , expected downtime 0
Dec 27 21:11:08 migration status: active (transferred 2077930417, remaining 0), total 2156396544) , expected downtime 0
Dec 27 21:11:09 migration speed: 62.06 MB/s - downtime 37 ms
Dec 27 21:11:09 migration status: completed
Dec 27 21:11:13 migration finished successfuly (duration 00:00:41)
TASK OK

with unsecure migration without SSH Tunnel:
Dec 27 22:43:14 starting migration of VM 105 to node 'cloud1-1203' (10.255.0.22)
Dec 27 22:43:14 copying disk images
Dec 27 22:43:14 starting VM 105 on remote node 'cloud1-1203'
Dec 27 22:43:17 starting online/live migration on 10.255.0.22:60000
Dec 27 22:43:17 migrate_set_speed: 8589934592
Dec 27 22:43:17 migrate_set_downtime: 1
Dec 27 22:43:19 migration speed: 1024.00 MB/s - downtime 1100 ms
Dec 27 22:43:19 migration status: completed
Dec 27 22:43:22 migration finished successfuly (duration 00:00:09)
TASK OK
This commit is contained in:
Stefan Priebe 2013-07-26 11:22:58 +02:00 committed by Dietmar Maurer
parent 7c14dcae1f
commit 5bc1e0397e
2 changed files with 30 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
PVE/QemuMigrate.pm
View File

@ -76,7 +76,9 @@ sub finish_command_pipe {
sub fork_tunnel {
my ($self, $nodeip, $lport, $rport) = @_;
my $cmd = [@{$self->{rem_ssh}}, '-L', "$lport:localhost:$rport",
my @localtunnelinfo = (defined $lport) ? qw(-L $lport:localhost:$rport) : ();
my $cmd = [@{$self->{rem_ssh}}, @localtunnelinfo,
'qm', 'mtunnel' ];
my $tunnel = $self->fork_command_pipe($cmd);
@ -307,8 +309,8 @@ sub phase2 {
$self->log('info', "starting VM $vmid on remote node '$self->{node}'");
my $raddr;
my $rport;
my $nodename = PVE::INotify::nodename();
## start on remote node
@ -333,9 +335,15 @@ sub phase2 {
PVE::Tools::run_command($cmd, input => $spice_ticket, outfunc => sub {
my $line = shift;
if ($line =~ m/^migration listens on port (\d+)$/) {
if ($line =~ m/^migration listens on tcp:([\d\.]+|localhost):(\d+)$/) {
$raddr = $1;
$rport = int($2);
}
elsif ($line =~ m/^migration listens on port (\d+)$/) {
$raddr = "localhost";
$rport = int($1);
}elsif ($line =~ m/^spice listens on port (\d+)$/) {
}
elsif ($line =~ m/^spice listens on port (\d+)$/) {
$spice_port = int($1);
}
}, errfunc => sub {
@ -343,18 +351,16 @@ sub phase2 {
$self->log('info', $line);
});
die "unable to detect remote migration port\n" if !$rport;
$self->log('info', "starting migration tunnel");
die "unable to detect remote migration address\n" if !$raddr;
## create tunnel to remote port
my $lport = PVE::Tools::next_migrate_port();
$self->log('info', "starting ssh migration tunnel");
my $lport = ($raddr eq "localhost") ? PVE::Tools::next_migrate_port() : undef;
$self->{tunnel} = $self->fork_tunnel($self->{nodeip}, $lport, $rport);
$self->log('info', "starting online/live migration on port $lport");
# start migration
my $start = time();
$self->log('info', "starting online/live migration on $raddr:$rport");
$self->{livemigration} = 1;
# load_defaults
my $defaults = PVE::QemuServer::load_defaults();
@ -415,9 +421,10 @@ sub phase2 {
}
eval {
PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "migrate", uri => "tcp:localhost:$lport");
PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "migrate", uri => "tcp:$raddr:$rport");
};
my $merr = $@;
$self->log('info', "migrate uri => tcp:$raddr:$rport failed: $merr") if $merr;
my $lstat = 0;
my $usleep = 2000000;
@ -569,8 +576,8 @@ sub phase3_cleanup {
die "Failed to move config to node '$self->{node}' - rename failed: $!\n"
if !rename($conffile, $newconffile);
if ($self->{livemigration}) {
# now that config file is move, we can resume vm on target if livemigrate
if ($self->{tunnel}) {
my $cmd = [@{$self->{rem_ssh}}, 'qm', 'resume', $vmid, '--skiplock'];
eval{ PVE::Tools::run_command($cmd, outfunc => sub {},
errfunc => sub {

12
PVE/QemuServer.pm
View File

@ -3053,11 +3053,17 @@ sub vm_start {
my ($cmd, $vollist, $spice_port) = config_to_command($storecfg, $vmid, $conf, $defaults, $forcemachine);
my $migrate_port = 0;
my $migrate_uri;
if ($statefile) {
if ($statefile eq 'tcp') {
my $localip = "localhost";
my $datacenterconf = PVE::Cluster::cfs_read_file('datacenter.cfg');
if ($datacenterconf->{migration_unsecure}) {
my $nodename = PVE::INotify::nodename();
$localip = PVE::Cluster::remote_node_ip($nodename, 1);
}
$migrate_port = PVE::Tools::next_migrate_port();
my $migrate_uri = "tcp:localhost:${migrate_port}";
$migrate_uri = "tcp:${localip}:${migrate_port}";
push @$cmd, '-incoming', $migrate_uri;
push @$cmd, '-S';
} else {
@ -3085,7 +3091,7 @@ sub vm_start {
my $err = $@;
die "start failed: $err" if $err;
print "migration listens on port $migrate_port\n" if $migrate_port;
print "migration listens on $migrate_uri\n" if $migrate_uri;
if ($statefile && $statefile ne 'tcp') {
eval { vm_mon_cmd_nocheck($vmid, "cont"); };