[pve-devel] [PATCH v2 qemu-server 6/8] migrate: refactor remote VM/tunnel start
Fabian Grünbichler
f.gruenbichler at proxmox.com
Thu Nov 11 15:07:19 CET 2021
no semantic changes intended, except for:
- no longer passing the main migration UNIX socket to SSH twice for
forwarding
- dropping the 'unix:' prefix in start_remote_tunnel's timeout error message
Signed-off-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
---
Notes:
v2: fixed nits
PVE/QemuMigrate.pm | 158 ++++++++++++++++++++++++++++-----------------
PVE/QemuServer.pm | 34 +++++-----
2 files changed, 113 insertions(+), 79 deletions(-)
diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index 779f5ee..461ac95 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -206,19 +206,24 @@ sub finish_tunnel {
die $err if $err;
}
+# tunnel_info:
+# proto: unix (secure) or tcp (insecure/legacy compat)
+# addr: IP or UNIX socket path
+# port: optional TCP port
+# unix_sockets: additional UNIX socket paths to forward
sub start_remote_tunnel {
- my ($self, $raddr, $rport, $ruri, $unix_socket_info) = @_;
+ my ($self, $tunnel_info) = @_;
my $nodename = PVE::INotify::nodename();
my $migration_type = $self->{opts}->{migration_type};
if ($migration_type eq 'secure') {
- if ($ruri =~ /^unix:/) {
- my $ssh_forward_info = ["$raddr:$raddr"];
- $unix_socket_info->{$raddr} = 1;
+ if ($tunnel_info->{proto} eq 'unix') {
+ my $ssh_forward_info = [];
- my $unix_sockets = [ keys %$unix_socket_info ];
+ my $unix_sockets = [ keys %{$tunnel_info->{unix_sockets}} ];
+ push @$unix_sockets, $tunnel_info->{addr};
for my $sock (@$unix_sockets) {
push @$ssh_forward_info, "$sock:$sock";
unlink $sock;
@@ -245,23 +250,23 @@ sub start_remote_tunnel {
if ($unix_socket_try > 100) {
$self->{errors} = 1;
$self->finish_tunnel($self->{tunnel});
- die "Timeout, migration socket $ruri did not get ready";
+ die "Timeout, migration socket $tunnel_info->{addr} did not get ready";
}
$self->{tunnel}->{unix_sockets} = $unix_sockets if (@$unix_sockets);
- } elsif ($ruri =~ /^tcp:/) {
+ } elsif ($tunnel_info->{proto} eq 'tcp') {
my $ssh_forward_info = [];
- if ($raddr eq "localhost") {
+ if ($tunnel_info->{addr} eq "localhost") {
# for backwards compatibility with older qemu-server versions
my $pfamily = PVE::Tools::get_host_address_family($nodename);
my $lport = PVE::Tools::next_migrate_port($pfamily);
- push @$ssh_forward_info, "$lport:localhost:$rport";
+ push @$ssh_forward_info, "$lport:localhost:$tunnel_info->{rport}";
}
$self->{tunnel} = $self->fork_tunnel($ssh_forward_info);
} else {
- die "unsupported protocol in migration URI: $ruri\n";
+ die "unsupported protocol in migration URI: $tunnel_info->{proto}\n";
}
} else {
#fork tunnel for insecure migration, to send faster commands like resume
@@ -813,52 +818,40 @@ sub phase1_cleanup {
}
}
-sub phase2 {
- my ($self, $vmid) = @_;
+sub phase2_start_local_cluster {
+ my ($self, $vmid, $params) = @_;
my $conf = $self->{vmconf};
my $local_volumes = $self->{local_volumes};
my @online_local_volumes = $self->filter_local_volumes('online');
$self->{storage_migration} = 1 if scalar(@online_local_volumes);
+ my $start = $params->{start_params};
+ my $migrate = $params->{migrate_opts};
$self->log('info', "starting VM $vmid on remote node '$self->{node}'");
- my $raddr;
- my $rport;
- my $ruri; # the whole migration dst. URI (protocol:address[:port])
- my $nodename = PVE::INotify::nodename();
+ my $tunnel_info = {};
## start on remote node
my $cmd = [@{$self->{rem_ssh}}];
- my $spice_ticket;
- if (PVE::QemuServer::vga_conf_has_spice($conf->{vga})) {
- my $res = mon_cmd($vmid, 'query-spice');
- $spice_ticket = $res->{ticket};
- }
+ push @$cmd, 'qm', 'start', $vmid, '--skiplock';
+ push @$cmd, '--migratedfrom', $migrate->{migratedfrom};
- push @$cmd , 'qm', 'start', $vmid, '--skiplock', '--migratedfrom', $nodename;
+ push @$cmd, '--migration_type', $migrate->{type};
- my $migration_type = $self->{opts}->{migration_type};
+ push @$cmd, '--migration_network', $migrate->{network}
+ if $migrate->{network};
- push @$cmd, '--migration_type', $migration_type;
+ push @$cmd, '--stateuri', $start->{statefile};
- push @$cmd, '--migration_network', $self->{opts}->{migration_network}
- if $self->{opts}->{migration_network};
-
- if ($migration_type eq 'insecure') {
- push @$cmd, '--stateuri', 'tcp';
- } else {
- push @$cmd, '--stateuri', 'unix';
+ if ($start->{forcemachine}) {
+ push @$cmd, '--machine', $start->{forcemachine};
}
- if ($self->{forcemachine}) {
- push @$cmd, '--machine', $self->{forcemachine};
- }
-
- if ($self->{forcecpu}) {
- push @$cmd, '--force-cpu', $self->{forcecpu};
+ if ($start->{forcecpu}) {
+ push @$cmd, '--force-cpu', $start->{forcecpu};
}
if ($self->{storage_migration}) {
@@ -866,11 +859,8 @@ sub phase2 {
}
my $spice_port;
- my $unix_socket_info = {};
- # version > 0 for unix socket support
- my $nbd_protocol_version = 1;
- my $input = "nbd_protocol_version: $nbd_protocol_version\n";
- $input .= "spice_ticket: $spice_ticket\n" if $spice_ticket;
+ my $input = "nbd_protocol_version: $migrate->{nbd_proto_version}\n";
+ $input .= "spice_ticket: $migrate->{spice_ticket}\n" if $migrate->{spice_ticket};
my @online_replicated_volumes = $self->filter_local_volumes('online', 1);
foreach my $volid (@online_replicated_volumes) {
@@ -900,20 +890,20 @@ sub phase2 {
my $exitcode = PVE::Tools::run_command($cmd, input => $input, outfunc => sub {
my $line = shift;
- if ($line =~ m/^migration listens on tcp:(localhost|[\d\.]+|\[[\d\.:a-fA-F]+\]):(\d+)$/) {
- $raddr = $1;
- $rport = int($2);
- $ruri = "tcp:$raddr:$rport";
+ if ($line =~ m/^migration listens on (tcp):(localhost|[\d\.]+|\[[\d\.:a-fA-F]+\]):(\d+)$/) {
+ $tunnel_info->{addr} = $2;
+ $tunnel_info->{port} = int($3);
+ $tunnel_info->{proto} = $1;
}
- elsif ($line =~ m!^migration listens on unix:(/run/qemu-server/(\d+)\.migrate)$!) {
- $raddr = $1;
- die "Destination UNIX sockets VMID does not match source VMID" if $vmid ne $2;
- $ruri = "unix:$raddr";
+ elsif ($line =~ m!^migration listens on (unix):(/run/qemu-server/(\d+)\.migrate)$!) {
+ $tunnel_info->{addr} = $2;
+ die "Destination UNIX sockets VMID does not match source VMID" if $vmid ne $3;
+ $tunnel_info->{proto} = $1;
}
elsif ($line =~ m/^migration listens on port (\d+)$/) {
- $raddr = "localhost";
- $rport = int($1);
- $ruri = "tcp:$raddr:$rport";
+ $tunnel_info->{addr} = "localhost";
+ $tunnel_info->{port} = int($1);
+ $tunnel_info->{proto} = "tcp";
}
elsif ($line =~ m/^spice listens on port (\d+)$/) {
$spice_port = int($1);
@@ -934,7 +924,7 @@ sub phase2 {
$targetdrive =~ s/drive-//g;
$handle_storage_migration_listens->($targetdrive, $drivestr, $nbd_uri);
- $unix_socket_info->{$nbd_unix_addr} = 1;
+ $tunnel_info->{unix_sockets}->{$nbd_unix_addr} = 1;
} elsif ($line =~ m/^re-using replicated volume: (\S+) - (.*)$/) {
my $drive = $1;
my $volid = $2;
@@ -949,19 +939,65 @@ sub phase2 {
die "remote command failed with exit code $exitcode\n" if $exitcode;
- die "unable to detect remote migration address\n" if !$raddr;
+ die "unable to detect remote migration address\n" if !$tunnel_info->{addr} || !$tunnel_info->{proto};
if (scalar(keys %$target_replicated_volumes) != scalar(@online_replicated_volumes)) {
die "number of replicated disks on source and target node do not match - target node too old?\n"
}
+ return ($tunnel_info, $spice_port);
+}
+
+sub phase2 {
+ my ($self, $vmid) = @_;
+
+ my $conf = $self->{vmconf};
+
+ # version > 0 for unix socket support
+ my $nbd_protocol_version = 1;
+
+ my $spice_ticket;
+ if (PVE::QemuServer::vga_conf_has_spice($conf->{vga})) {
+ my $res = mon_cmd($vmid, 'query-spice');
+ $spice_ticket = $res->{ticket};
+ }
+
+ my $migration_type = $self->{opts}->{migration_type};
+ my $state_uri = $migration_type eq 'insecure' ? 'tcp' : 'unix';
+
+ my $params = {
+ start_params => {
+ statefile => $state_uri,
+ forcemachine => $self->{forcemachine},
+ forcecpu => $self->{forcecpu},
+ skiplock => 1,
+ },
+ migrate_opts => {
+ spice_ticket => $spice_ticket,
+ type => $migration_type,
+ network => $self->{opts}->{migration_network},
+ storagemap => $self->{opts}->{storagemap},
+ migratedfrom => PVE::INotify::nodename(),
+ nbd_proto_version => $nbd_protocol_version,
+ nbd => $self->{nbd},
+ },
+ };
+
+ my ($tunnel_info, $spice_port) = $self->phase2_start_local_cluster($vmid, $params);
+
$self->log('info', "start remote tunnel");
- $self->start_remote_tunnel($raddr, $rport, $ruri, $unix_socket_info);
+ $self->start_remote_tunnel($tunnel_info);
+
+ my $migrate_uri = "$tunnel_info->{proto}:$tunnel_info->{addr}";
+ $migrate_uri .= ":$tunnel_info->{port}"
+ if defined($tunnel_info->{port});
if ($self->{storage_migration}) {
$self->{storage_migration_jobs} = {};
$self->log('info', "starting storage migration");
+ my @online_local_volumes = $self->filter_local_volumes('online');
+
die "The number of local disks does not match between the source and the destination.\n"
if (scalar(keys %{$self->{target_drive}}) != scalar(@online_local_volumes));
foreach my $drive (keys %{$self->{target_drive}}){
@@ -971,7 +1007,7 @@ sub phase2 {
my $source_drive = PVE::QemuServer::parse_drive($drive, $conf->{$drive});
my $source_volid = $source_drive->{file};
- my $bwlimit = $local_volumes->{$source_volid}->{bwlimit};
+ my $bwlimit = $self->{local_volumes}->{$source_volid}->{bwlimit};
my $bitmap = $target->{bitmap};
$self->log('info', "$drive: start migration to $nbd_uri");
@@ -979,7 +1015,7 @@ sub phase2 {
}
}
- $self->log('info', "starting online/live migration on $ruri");
+ $self->log('info', "starting online/live migration on $migrate_uri");
$self->{livemigration} = 1;
# load_defaults
@@ -1056,12 +1092,12 @@ sub phase2 {
my $start = time();
- $self->log('info', "start migrate command to $ruri");
+ $self->log('info', "start migrate command to $migrate_uri");
eval {
- mon_cmd($vmid, "migrate", uri => $ruri);
+ mon_cmd($vmid, "migrate", uri => $migrate_uri);
};
my $merr = $@;
- $self->log('info', "migrate uri => $ruri failed: $merr") if $merr;
+ $self->log('info', "migrate uri => $migrate_uri failed: $merr") if $merr;
my $last_mem_transferred = 0;
my $usleep = 1000000;
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 387f71e..4396a36 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -5451,10 +5451,10 @@ sub vm_start_nolock {
return $migration_ip;
};
- my $migrate_uri;
if ($statefile) {
if ($statefile eq 'tcp') {
- my $localip = "localhost";
+ my $migrate = $res->{migrate} = { proto => 'tcp' };
+ $migrate->{addr} = "localhost";
my $datacenterconf = PVE::Cluster::cfs_read_file('datacenter.cfg');
my $nodename = nodename();
@@ -5467,26 +5467,26 @@ sub vm_start_nolock {
}
if ($migration_type eq 'insecure') {
- $localip = $get_migration_ip->($nodename);
- $localip = "[$localip]" if Net::IP::ip_is_ipv6($localip);
+ $migrate->{addr} = $get_migration_ip->($nodename);
+ $migrate->{addr} = "[$migrate->{addr}]" if Net::IP::ip_is_ipv6($migrate->{addr});
}
my $pfamily = PVE::Tools::get_host_address_family($nodename);
- my $migrate_port = PVE::Tools::next_migrate_port($pfamily);
- $migrate_uri = "tcp:${localip}:${migrate_port}";
- push @$cmd, '-incoming', $migrate_uri;
+ $migrate->{port} = PVE::Tools::next_migrate_port($pfamily);
+ $migrate->{uri} = "tcp:$migrate->{addr}:$migrate->{port}";
+ push @$cmd, '-incoming', $migrate->{uri};
push @$cmd, '-S';
} elsif ($statefile eq 'unix') {
# should be default for secure migrations as a ssh TCP forward
# tunnel is not deterministic reliable ready and fails regurarly
# to set up in time, so use UNIX socket forwards
- my $socket_addr = "/run/qemu-server/$vmid.migrate";
- unlink $socket_addr;
+ my $migrate = $res->{migrate} = { proto => 'unix' };
+ $migrate->{addr} = "/run/qemu-server/$vmid.migrate";
+ unlink $migrate->{addr};
- $migrate_uri = "unix:$socket_addr";
-
- push @$cmd, '-incoming', $migrate_uri;
+ $migrate->{uri} = "unix:$migrate->{addr}";
+ push @$cmd, '-incoming', $migrate->{uri};
push @$cmd, '-S';
} elsif (-e $statefile) {
@@ -5628,10 +5628,9 @@ sub vm_start_nolock {
eval { PVE::QemuServer::PCI::reserve_pci_usage($pci_id_list, $vmid, undef, $pid) };
warn $@ if $@;
- print "migration listens on $migrate_uri\n" if $migrate_uri;
- $res->{migrate_uri} = $migrate_uri;
-
- if ($statefile && $statefile ne 'tcp' && $statefile ne 'unix') {
+ if (defined($res->{migrate})) {
+ print "migration listens on $res->{migrate}->{uri}\n";
+ } elsif ($statefile) {
eval { mon_cmd($vmid, "cont"); };
warn $@ if $@;
}
@@ -5646,6 +5645,7 @@ sub vm_start_nolock {
my $socket_path = "/run/qemu-server/$vmid\_nbd.migrate";
mon_cmd($vmid, "nbd-server-start", addr => { type => 'unix', data => { path => $socket_path } } );
$migrate_storage_uri = "nbd:unix:$socket_path";
+ $res->{migrate}->{unix_sockets} = [$socket_path];
} else {
my $nodename = nodename();
my $localip = $get_migration_ip->($nodename);
@@ -5663,8 +5663,6 @@ sub vm_start_nolock {
$migrate_storage_uri = "nbd:${localip}:${storage_migrate_port}";
}
- $res->{migrate_storage_uri} = $migrate_storage_uri;
-
foreach my $opt (sort keys %$nbd) {
my $drivestr = $nbd->{$opt}->{drivestr};
my $volid = $nbd->{$opt}->{volid};
--
2.30.2
More information about the pve-devel
mailing list