use PVE::Exception qw(raise raise_param_exc);
use PVE::Storage;
use PVE::Tools qw(run_command lock_file file_read_firstline);
+use PVE::JSONSchema qw(get_standard_option);
use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_write_file cfs_lock_file);
use PVE::INotify;
use PVE::ProcFSTools;
# Note about locking: we use flock on the config file protect
# against concurent actions.
# Aditionaly, we have a 'lock' setting in the config file. This
-# can be set to 'migrate' or 'backup'. Most actions are not
+# can be set to 'migrate', 'backup', 'snapshot' or 'rollback'. Most actions are not
# allowed when such lock is set. But you can ignore this kind of
# lock with the --skiplock flag.
optional => 1,
});
+PVE::JSONSchema::register_standard_option('pve-snapshot-name', {
+ description => "The name of the snapshot.",
+ type => 'string', format => 'pve-configid',
+ maxLength => 40,
+});
+
#no warnings 'redefine';
unless(defined(&_VZSYSCALLS_H_)) {
optional => 1,
type => 'string',
description => "Lock/unlock the VM.",
- enum => [qw(migrate backup)],
+ enum => [qw(migrate backup snapshot rollback)],
},
cpulimit => {
optional => 1,
description => "Enable/disable ACPI.",
default => 1,
},
+ agent => {
+ optional => 1,
+ type => 'boolean',
+ description => "Enable/disable Qemu GuestAgent.",
+ default => 0,
+ },
kvm => {
optional => 1,
type => 'boolean',
enum => [ qw(486 athlon pentium pentium2 pentium3 coreduo core2duo kvm32 kvm64 qemu32 qemu64 phenom cpu64-rhel6 cpu64-rhel5 Conroe Penryn Nehalem Westmere Opteron_G1 Opteron_G2 Opteron_G3 host) ],
default => 'qemu64',
},
+ parent => get_standard_option('pve-snapshot-name', {
+ optional => 1,
+ description => "Parent snapshot name. This is used internally, and should not be modified.",
+ }),
+ snaptime => {
+ optional => 1,
+ description => "Timestamp for snapshots.",
+ type => 'integer',
+ minimum => 0,
+ },
+ vmstate => {
+ optional => 1,
+ type => 'string', format => 'pve-volume-id',
+ description => "Reference to a volume which stores the VM state. This is used internally for snapshots.",
+ },
};
# what about other qemu settings ?
my $prop = shift;
foreach my $opt (keys %$confdesc) {
+ next if $opt eq 'parent' || $opt eq 'snaptime' || $opt eq 'vmstate';
$prop->{$opt} = $confdesc->{$opt};
}
my $res = {
digest => Digest::SHA::sha1_hex($raw),
+ snapshots => {},
};
$filename =~ m|/qemu-server/(\d+)\.conf$|
my $vmid = $1;
+ my $conf = $res;
my $descr = '';
- while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
- my $line = $1;
-
+ my @lines = split(/\n/, $raw);
+ foreach my $line (@lines) {
next if $line =~ m/^\s*$/;
+
+ if ($line =~ m/^\[([a-z][a-z0-9_\-]+)\]\s*$/i) {
+ my $snapname = $1;
+ $conf->{description} = $descr if $descr;
+ $descr = '';
+ $conf = $res->{snapshots}->{$snapname} = {};
+ next;
+ }
if ($line =~ m/^\#(.*)\s*$/) {
$descr .= PVE::Tools::decode_text($1) . "\n";
if ($line =~ m/^(description):\s*(.*\S)\s*$/) {
$descr .= PVE::Tools::decode_text($2);
+ } elsif ($line =~ m/snapstate:\s*(prepare|delete)\s*$/) {
+ $conf->{snapstate} = $1;
} elsif ($line =~ m/^(args):\s*(.*\S)\s*$/) {
my $key = $1;
my $value = $2;
- $res->{$key} = $value;
+ $conf->{$key} = $value;
} elsif ($line =~ m/^([a-z][a-z_]*\d*):\s*(\S+)\s*$/) {
my $key = $1;
my $value = $2;
}
if ($key eq 'cdrom') {
- $res->{ide2} = $value;
+ $conf->{ide2} = $value;
} else {
- $res->{$key} = $value;
+ $conf->{$key} = $value;
}
}
}
}
- $res->{description} = $descr if $descr;
+ $conf->{description} = $descr if $descr;
- # convert old smp to sockets
- if ($res->{smp} && !$res->{sockets}) {
- $res->{sockets} = $res->{smp};
- }
- delete $res->{smp};
+ delete $res->{snapstate}; # just to be sure
return $res;
}
sub write_vm_config {
my ($filename, $conf) = @_;
+ delete $conf->{snapstate}; # just to be sure
+
if ($conf->{cdrom}) {
die "option ide2 conflicts with cdrom\n" if $conf->{ide2};
$conf->{ide2} = $conf->{cdrom};
delete $conf->{smp};
}
- my $new_volids = {};
- foreach my $key (keys %$conf) {
- next if $key eq 'digest' || $key eq 'description';
- my $value = $conf->{$key};
- eval { $value = check_type($key, $value); };
- die "unable to parse value of '$key' - $@" if $@;
+ my $used_volids = {};
+
+ my $cleanup_config = sub {
+ my ($cref) = @_;
- $conf->{$key} = $value;
+ foreach my $key (keys %$cref) {
+ next if $key eq 'digest' || $key eq 'description' || $key eq 'snapshots' ||
+ $key eq 'snapstate';
+ my $value = $cref->{$key};
+ eval { $value = check_type($key, $value); };
+ die "unable to parse value of '$key' - $@" if $@;
+
+ $cref->{$key} = $value;
- if (valid_drivename($key)) {
- my $drive = PVE::QemuServer::parse_drive($key, $value);
- $new_volids->{$drive->{file}} = 1 if $drive && $drive->{file};
+ if (valid_drivename($key)) {
+ my $drive = PVE::QemuServer::parse_drive($key, $value);
+ $used_volids->{$drive->{file}} = 1 if $drive && $drive->{file};
+ }
}
+ };
+
+ &$cleanup_config($conf);
+ foreach my $snapname (keys %{$conf->{snapshots}}) {
+ &$cleanup_config($conf->{snapshots}->{$snapname});
}
# remove 'unusedX' settings if we re-add a volume
foreach my $key (keys %$conf) {
my $value = $conf->{$key};
- if ($key =~ m/^unused/ && $new_volids->{$value}) {
+ if ($key =~ m/^unused/ && $used_volids->{$value}) {
delete $conf->{$key};
}
}
+
+ my $generate_raw_config = sub {
+ my ($conf) = @_;
- # gererate RAW data
- my $raw = '';
+ my $raw = '';
- # add description as comment to top of file
- my $descr = $conf->{description} || '';
- foreach my $cl (split(/\n/, $descr)) {
- $raw .= '#' . PVE::Tools::encode_text($cl) . "\n";
- }
+ # add description as comment to top of file
+ my $descr = $conf->{description} || '';
+ foreach my $cl (split(/\n/, $descr)) {
+ $raw .= '#' . PVE::Tools::encode_text($cl) . "\n";
+ }
+
+ foreach my $key (sort keys %$conf) {
+ next if $key eq 'digest' || $key eq 'description' || $key eq 'snapshots';
+ $raw .= "$key: $conf->{$key}\n";
+ }
+ return $raw;
+ };
- foreach my $key (sort keys %$conf) {
- next if $key eq 'digest' || $key eq 'description';
- $raw .= "$key: $conf->{$key}\n";
+ my $raw = &$generate_raw_config($conf);
+ foreach my $snapname (sort keys %{$conf->{snapshots}}) {
+ $raw .= "\n[$snapname]\n";
+ $raw .= &$generate_raw_config($conf->{snapshots}->{$snapname});
}
return $raw;
#my $soundhw = $conf->{soundhw} || $defaults->{soundhw};
#push @$cmd, '-soundhw', 'es1370';
#push @$cmd, '-soundhw', $soundhw if $soundhw;
+
+ if($conf->{agent}) {
+ my $qgasocket = qga_socket($vmid);
+ my $pciaddr = print_pci_addr("qga0", $bridges);
+ push @$devices, '-chardev', "socket,path=$qgasocket,server,nowait,id=qga0";
+ push @$devices, '-device', "virtio-serial,id=qga0$pciaddr";
+ push @$devices, '-device', 'virtserialport,chardev=qga0,name=org.qemu.guest_agent.0';
+ }
+
$pciaddr = print_pci_addr("balloon0", $bridges);
push @$devices, '-device', "virtio-balloon-pci,id=balloon0$pciaddr" if $conf->{balloon};
return "${var_run_tmpdir}/$vmid.qmp";
}
+sub qga_socket {
+ my ($vmid) = @_;
+ return "${var_run_tmpdir}/$vmid.qga";
+}
+
sub pidfile_name {
my ($vmid) = @_;
return "${var_run_tmpdir}/$vmid.pid";
}
+sub qemu_volume_snapshot {
+ my ($vmid, $deviceid, $storecfg, $volid, $snap) = @_;
+
+ my $running = PVE::QemuServer::check_running($vmid);
+
+ return if !PVE::Storage::volume_snapshot($storecfg, $volid, $snap, $running);
+
+ return if !$running;
+
+ vm_mon_cmd($vmid, "snapshot-drive", device => $deviceid, name => $snap);
+
+}
+
+sub qemu_volume_snapshot_delete {
+ my ($vmid, $deviceid, $storecfg, $volid, $snap) = @_;
+
+ my $running = PVE::QemuServer::check_running($vmid);
+
+ return if !PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snap, $running);
+
+ return if !$running;
+
+ vm_mon_cmd($vmid, "delete-drive-snapshot", device => $deviceid, name => $snap);
+}
+
+sub qga_freezefs {
+ my ($vmid) = @_;
+
+ #need to impplement call to qemu-ga
+}
+
+sub qga_unfreezefs {
+ my ($vmid) = @_;
+
+ #need to impplement call to qemu-ga
+}
+
sub vm_start {
my ($storecfg, $vmid, $statefile, $skiplock, $migratedfrom) = @_;
if ($statefile eq 'tcp') {
print "migration listens on port $migrate_port\n";
} else {
- unlink $statefile;
- # fixme: send resume - is that necessary ?
- eval { vm_mon_cmd($vmid, "cont"); };
+ if ($migratedfrom) {
+ unlink $statefile;
+ # fixme: send resume - is that necessary ?
+ eval { vm_mon_cmd($vmid, "cont"); };
+ }
}
}
PVE::Storage::deactivate_volumes($storecfg, $vollist);
}
- foreach my $ext (qw(mon qmp pid vnc)) {
+ foreach my $ext (qw(mon qmp pid vnc qga)) {
unlink "/var/run/qemu-server/${vmid}.$ext";
}
};
scsihw0 => { bus => 0, addr => 5 },
scsihw1 => { bus => 0, addr => 6 },
ahci0 => { bus => 0, addr => 7 },
+ qga0 => { bus => 0, addr => 8 },
virtio0 => { bus => 0, addr => 10 },
virtio1 => { bus => 0, addr => 11 },
virtio2 => { bus => 0, addr => 12 },
die "unable to commit configuration file '$conffile'\n";
};
+
+# Internal snapshots
+
+# NOTE: Snapshot create/delete involves several non-atomic
+# action, and can take a long time.
+# So we try to avoid locking the file and use 'lock' variable
+# inside the config file instead.
+
+my $snapshot_copy_config = sub {
+ my ($source, $dest) = @_;
+
+ foreach my $k (keys %$source) {
+ next if $k eq 'snapshots';
+ next if $k eq 'snapstate';
+ next if $k eq 'snaptime';
+ next if $k eq 'vmstate';
+ next if $k eq 'lock';
+ next if $k eq 'digest';
+ next if $k eq 'description';
+ next if $k =~ m/^unused\d+$/;
+
+ $dest->{$k} = $source->{$k};
+ }
+};
+
+my $snapshot_apply_config = sub {
+ my ($conf, $snap) = @_;
+
+ # copy snapshot list
+ my $newconf = {
+ snapshots => $conf->{snapshots},
+ };
+
+ # keep description and list of unused disks
+ foreach my $k (keys %$conf) {
+ next if !($k =~ m/^unused\d+$/ || $k eq 'description');
+ $newconf->{$k} = $conf->{$k};
+ }
+
+ &$snapshot_copy_config($snap, $newconf);
+
+ return $newconf;
+};
+
+sub foreach_writable_storage {
+ my ($conf, $func) = @_;
+
+ my $sidhash = {};
+
+ foreach my $ds (keys %$conf) {
+ next if !valid_drivename($ds);
+
+ my $drive = parse_drive($ds, $conf->{$ds});
+ next if !$drive;
+ next if drive_is_cdrom($drive);
+
+ my $volid = $drive->{file};
+
+ my ($sid, $volname) = PVE::Storage::parse_volume_id($volid, 1);
+ $sidhash->{$sid} = $sid if $sid;
+ }
+
+ foreach my $sid (sort keys %$sidhash) {
+ &$func($sid);
+ }
+}
+
+my $alloc_vmstate_volid = sub {
+ my ($storecfg, $vmid, $conf, $snapname) = @_;
+
+ # Note: we try to be smart when selecting a $target storage
+
+ my $target;
+
+ # search shared storage first
+ foreach_writable_storage($conf, sub {
+ my ($sid) = @_;
+ my $scfg = PVE::Storage::storage_config($storecfg, $sid);
+ return if !$scfg->{shared};
+
+ $target = $sid if !$target || $scfg->{path}; # prefer file based storage
+ });
+
+ if (!$target) {
+ # now search local storage
+ foreach_writable_storage($conf, sub {
+ my ($sid) = @_;
+ my $scfg = PVE::Storage::storage_config($storecfg, $sid);
+ return if $scfg->{shared};
+
+ $target = $sid if !$target || $scfg->{path}; # prefer file based storage;
+ });
+ }
+
+ $target = 'local' if !$target;
+
+ my $driver_state_size = 32; # assume 32MB is enough to safe all driver state;
+ my $size = $conf->{memory} + $driver_state_size;
+
+ my $name = "vm-$vmid-state-$snapname";
+ my $scfg = PVE::Storage::storage_config($storecfg, $target);
+ $name .= ".raw" if $scfg->{path}; # add filename extension for file base storage
+ my $volid = PVE::Storage::vdisk_alloc($storecfg, $target, $vmid, 'raw', $name, $size*1024);
+
+ return $volid;
+};
+
+my $snapshot_prepare = sub {
+ my ($vmid, $snapname, $save_vmstate, $comment) = @_;
+
+ my $snap;
+
+ my $updatefn = sub {
+
+ my $conf = load_config($vmid);
+
+ check_lock($conf);
+
+ $conf->{lock} = 'snapshot';
+
+ die "snapshot name '$snapname' already used\n"
+ if defined($conf->{snapshots}->{$snapname});
+
+ my $storecfg = PVE::Storage::config();
+
+ foreach_drive($conf, sub {
+ my ($ds, $drive) = @_;
+
+ return if drive_is_cdrom($drive);
+ my $volid = $drive->{file};
+
+ my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid, 1);
+ if ($storeid) {
+ my $scfg = PVE::Storage::storage_config($storecfg, $storeid);
+ die "can't snapshot volume '$volid'\n"
+ if !(($scfg->{path} && $volname =~ m/\.qcow2$/) ||
+ ($scfg->{type} eq 'rbd') ||
+ ($scfg->{type} eq 'sheepdog'));
+ } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
+ die "snapshot device '$volid' is not possible\n";
+ } else {
+ die "can't snapshot volume '$volid'\n";
+ }
+ });
+
+
+ $snap = $conf->{snapshots}->{$snapname} = {};
+
+ if ($save_vmstate && check_running($vmid)) {
+ $snap->{vmstate} = &$alloc_vmstate_volid($storecfg, $vmid, $conf, $snapname);
+ }
+
+ &$snapshot_copy_config($conf, $snap);
+
+ $snap->{snapstate} = "prepare";
+ $snap->{snaptime} = time();
+ $snap->{description} = $comment if $comment;
+
+ update_config_nolock($vmid, $conf, 1);
+ };
+
+ lock_config($vmid, $updatefn);
+
+ return $snap;
+};
+
+my $snapshot_commit = sub {
+ my ($vmid, $snapname) = @_;
+
+ my $updatefn = sub {
+
+ my $conf = load_config($vmid);
+
+ die "missing snapshot lock\n"
+ if !($conf->{lock} && $conf->{lock} eq 'snapshot');
+
+ my $snap = $conf->{snapshots}->{$snapname};
+
+ die "snapshot '$snapname' does not exist\n" if !defined($snap);
+
+ die "wrong snapshot state\n"
+ if !($snap->{snapstate} && $snap->{snapstate} eq "prepare");
+
+ delete $snap->{snapstate};
+ delete $conf->{lock};
+
+ my $newconf = &$snapshot_apply_config($conf, $snap);
+
+ $newconf->{parent} = $snapname;
+
+ update_config_nolock($vmid, $newconf, 1);
+ };
+
+ lock_config($vmid, $updatefn);
+};
+
+sub snapshot_rollback {
+ my ($vmid, $snapname) = @_;
+
+ my $snap;
+
+ my $prepare = 1;
+
+ my $storecfg = PVE::Storage::config();
+
+ my $updatefn = sub {
+
+ my $conf = load_config($vmid);
+
+ if ($prepare) {
+ check_lock($conf);
+ vm_stop($storecfg, $vmid, undef, undef, 5, undef, undef);
+ }
+
+ die "unable to rollback vm $vmid: vm is running\n"
+ if check_running($vmid);
+
+ if ($prepare) {
+ $conf->{lock} = 'rollback';
+ } else {
+ die "got wrong lock\n" if !($conf->{lock} && $conf->{lock} eq 'rollback');
+ delete $conf->{lock};
+ }
+
+ $snap = $conf->{snapshots}->{$snapname};
+
+ die "snapshot '$snapname' does not exist\n" if !defined($snap);
+
+ die "unable to rollback to incomplete snapshot (snapstate = $snap->{snapstate})\n"
+ if $snap->{snapstate};
+
+ if (!$prepare) {
+ # copy snapshot config to current config
+ $conf = &$snapshot_apply_config($conf, $snap);
+ $conf->{parent} = $snapname;
+ }
+
+ update_config_nolock($vmid, $conf, 1);
+
+ if (!$prepare && $snap->{vmstate}) {
+ my $statefile = PVE::Storage::path($storecfg, $snap->{vmstate});
+ # fixme: this only forws for files currently
+ vm_start($storecfg, $vmid, $statefile);
+ }
+
+ };
+
+ lock_config($vmid, $updatefn);
+
+ foreach_drive($snap, sub {
+ my ($ds, $drive) = @_;
+
+ return if drive_is_cdrom($drive);
+
+ my $volid = $drive->{file};
+ my $device = "drive-$ds";
+
+ PVE::Storage::volume_snapshot_rollback($storecfg, $volid, $snapname);
+ });
+
+ $prepare = 0;
+ lock_config($vmid, $updatefn);
+}
+
+sub snapshot_create {
+ my ($vmid, $snapname, $save_vmstate, $freezefs, $comment) = @_;
+
+ my $snap = &$snapshot_prepare($vmid, $snapname, $save_vmstate, $comment);
+
+ $freezefs = $save_vmstate = 0 if !$snap->{vmstate}; # vm is not running
+
+ my $drivehash = {};
+
+ my $running = check_running($vmid);
+
+ eval {
+ # create internal snapshots of all drives
+
+ my $storecfg = PVE::Storage::config();
+
+ if ($running) {
+ if ($snap->{vmstate}) {
+ my $path = PVE::Storage::path($storecfg, $snap->{vmstate});
+ vm_mon_cmd($vmid, "snapshot-start", statefile => $path);
+ } else {
+ vm_mon_cmd($vmid, "snapshot-start");
+ }
+ };
+
+ qga_freezefs($vmid) if $running && $freezefs;
+
+ foreach_drive($snap, sub {
+ my ($ds, $drive) = @_;
+
+ return if drive_is_cdrom($drive);
+
+ my $volid = $drive->{file};
+ my $device = "drive-$ds";
+
+ qemu_volume_snapshot($vmid, $device, $storecfg, $volid, $snapname);
+ $drivehash->{$ds} = 1;
+ });
+ };
+ my $err = $@;
+
+ eval { gqa_unfreezefs($vmid) if $running && $freezefs; };
+ warn $@ if $@;
+
+ eval { vm_mon_cmd($vmid, "snapshot-end") if $running; };
+ warn $@ if $@;
+
+ if ($err) {
+ warn "snapshot create failed: starting cleanup\n";
+ eval { snapshot_delete($vmid, $snapname, 0, $drivehash); };
+ warn $@ if $@;
+ die $err;
+ }
+
+ &$snapshot_commit($vmid, $snapname);
+}
+
+# Note: $drivehash is only set when called from snapshot_create.
+sub snapshot_delete {
+ my ($vmid, $snapname, $force, $drivehash) = @_;
+
+ my $prepare = 1;
+
+ my $snap;
+ my $unused = [];
+
+ my $unlink_parent = sub {
+ my ($confref, $new_parent) = @_;
+
+ if ($confref->{parent} && $confref->{parent} eq $snapname) {
+ if ($new_parent) {
+ $confref->{parent} = $new_parent;
+ } else {
+ delete $confref->{parent};
+ }
+ }
+ };
+
+ my $updatefn = sub {
+ my ($remove_drive) = @_;
+
+ my $conf = load_config($vmid);
+
+ check_lock($conf) if !$drivehash;
+
+ $snap = $conf->{snapshots}->{$snapname};
+
+ die "snapshot '$snapname' does not exist\n" if !defined($snap);
+
+ # remove parent refs
+ &$unlink_parent($conf, $snap->{parent});
+ foreach my $sn (keys %{$conf->{snapshots}}) {
+ next if $sn eq $snapname;
+ &$unlink_parent($conf->{snapshots}->{$sn}, $snap->{parent});
+ }
+
+ if ($remove_drive) {
+ if ($remove_drive eq 'vmstate') {
+ delete $snap->{$remove_drive};
+ } else {
+ my $drive = parse_drive($remove_drive, $snap->{$remove_drive});
+ my $volid = $drive->{file};
+ delete $snap->{$remove_drive};
+ add_unused_volume($conf, $volid);
+ }
+ }
+
+ if ($prepare) {
+ $snap->{snapstate} = 'delete';
+ } else {
+ delete $conf->{snapshots}->{$snapname};
+ delete $conf->{lock} if $drivehash;
+ foreach my $volid (@$unused) {
+ add_unused_volume($conf, $volid);
+ }
+ }
+
+ update_config_nolock($vmid, $conf, 1);
+ };
+
+ lock_config($vmid, $updatefn);
+
+ # now remove vmstate file
+
+ my $storecfg = PVE::Storage::config();
+
+ if ($snap->{vmstate}) {
+ eval { PVE::Storage::vdisk_free($storecfg, $snap->{vmstate}); };
+ if (my $err = $@) {
+ die $err if !$force;
+ warn $err;
+ }
+ # save changes (remove vmstate from snapshot)
+ lock_config($vmid, $updatefn, 'vmstate') if !$force;
+ };
+
+ # now remove all internal snapshots
+ foreach_drive($snap, sub {
+ my ($ds, $drive) = @_;
+
+ return if drive_is_cdrom($drive);
+
+ my $volid = $drive->{file};
+ my $device = "drive-$ds";
+
+ if (!$drivehash || $drivehash->{$ds}) {
+ eval { qemu_volume_snapshot_delete($vmid, $device, $storecfg, $volid, $snapname); };
+ if (my $err = $@) {
+ die $err if !$force;
+ warn $err;
+ }
+ }
+
+ # save changes (remove drive fron snapshot)
+ lock_config($vmid, $updatefn, $ds) if !$force;
+ push @$unused, $volid;
+ });
+
+ # now cleanup config
+ $prepare = 0;
+ lock_config($vmid, $updatefn);
+}
+
1;
projects / qemu-server.git / blobdiff