1 package PVE
::AbstractConfig
;
6 use PVE
::Tools
qw(lock_file lock_file_full);
11 use PVE
::ReplicationConfig
;
14 my $nodename = PVE
::INotify
::nodename
();
16 # Printable string, currently either "VM" or "CT"
19 die "abstract method - implement me ";
22 sub __config_max_unused_disks
{
25 die "implement me - abstract method\n";
28 # Path to the flock file for this VM/CT
29 sub config_file_lock
{
30 my ($class, $vmid) = @_;
31 die "abstract method - implement me";
34 # Relative config file path for this VM/CT in CFS
36 my ($class, $vmid, $node) = @_;
37 die "abstract method - implement me";
40 # Absolute config file path for this VM/CT
42 my ($class, $vmid, $node) = @_;
44 my $cfspath = $class->cfs_config_path($vmid, $node);
45 return "/etc/pve/$cfspath";
48 # Read and parse config file for this VM/CT
50 my ($class, $vmid, $node) = @_;
52 $node = $nodename if !$node;
53 my $cfspath = $class->cfs_config_path($vmid, $node);
55 my $conf = PVE
::Cluster
::cfs_read_file
($cfspath);
56 die "Configuration file '$cfspath' does not exist\n"
62 # Generate and write config file for this VM/CT
64 my ($class, $vmid, $conf) = @_;
66 my $cfspath = $class->cfs_config_path($vmid);
68 PVE
::Cluster
::cfs_write_file
($cfspath, $conf);
71 # Pending changes related
73 sub parse_pending_delete
{
74 my ($class, $data) = @_;
81 my $pending_deletions = {};
82 for my $entry (split(/\s+/, $data)) {
83 my ($force, $key) = $entry =~ /^(!?)(.*)$/;
85 $pending_deletions->{$key} = {
86 force
=> $force ?
1 : 0,
90 return $pending_deletions;
93 sub print_pending_delete
{
94 my ($class, $delete_hash) = @_;
96 my $render_key = sub {
98 $key = "!$key" if $delete_hash->{$key}->{force
};
102 join (',', map { $render_key->($_) } sort keys %$delete_hash);
105 sub add_to_pending_delete
{
106 my ($class, $conf, $key, $force) = @_;
108 $conf->{pending
} //= {};
109 my $pending = $conf->{pending
};
110 my $pending_delete_hash = $class->parse_pending_delete($pending->{delete});
112 $pending_delete_hash->{$key} = { force
=> $force };
114 $pending->{delete} = $class->print_pending_delete($pending_delete_hash);
119 sub remove_from_pending_delete
{
120 my ($class, $conf, $key) = @_;
122 my $pending = $conf->{pending
};
123 my $pending_delete_hash = $class->parse_pending_delete($pending->{delete});
125 return $conf if ! exists $pending_delete_hash->{$key};
127 delete $pending_delete_hash->{$key};
129 if (%$pending_delete_hash) {
130 $pending->{delete} = $class->print_pending_delete($pending_delete_hash);
132 delete $pending->{delete};
138 sub cleanup_pending
{
139 my ($class, $conf) = @_;
141 my $pending = $conf->{pending
};
142 # remove pending changes when nothing changed
144 foreach my $opt (keys %{$conf->{pending
}}) {
145 next if $opt eq 'delete'; # just to be sure
146 if (defined($conf->{$opt}) && ($pending->{$opt} eq $conf->{$opt})) {
148 delete $pending->{$opt};
152 my $current_delete_hash = $class->parse_pending_delete($pending->{delete});
153 my $pending_delete_hash = {};
154 for my $opt (keys %$current_delete_hash) {
155 if (defined($conf->{$opt})) {
156 $pending_delete_hash->{$opt} = $current_delete_hash->{$opt};
162 if (%$pending_delete_hash) {
163 $pending->{delete} = $class->print_pending_delete($pending_delete_hash);
165 delete $pending->{delete};
171 sub load_snapshot_config
{
172 my ($class, $vmid, $snapname) = @_;
174 my $conf = $class->load_config($vmid);
176 my $snapshot = $conf->{snapshots
}->{$snapname};
177 die "snapshot '$snapname' does not exist\n" if !defined($snapshot);
179 $snapshot->{digest
} = $conf->{digest
};
185 sub load_current_config
{
186 my ($class, $vmid, $current) = @_;
188 my $conf = $class->load_config($vmid);
190 # take pending changes in
192 foreach my $opt (keys %{$conf->{pending
}}) {
193 next if $opt eq 'delete';
194 my $value = $conf->{pending
}->{$opt};
195 next if ref($value); # just to be sure
196 $conf->{$opt} = $value;
198 my $pending_delete_hash = $class->parse_pending_delete($conf->{pending
}->{delete});
199 foreach my $opt (keys %$pending_delete_hash) {
200 delete $conf->{$opt} if $conf->{$opt};
204 delete $conf->{snapshots
};
205 delete $conf->{pending
};
211 # Lock config file using flock, run $code with @param, unlock config file.
212 # $timeout is the maximum time to aquire the flock
213 sub lock_config_full
{
214 my ($class, $vmid, $timeout, $code, @param) = @_;
216 my $filename = $class->config_file_lock($vmid);
218 my $res = lock_file
($filename, $timeout, $code, @param);
225 sub create_and_lock_config
{
226 my ($class, $vmid, $allow_existing, $lock) = @_;
228 $class->lock_config_full($vmid, 5, sub {
229 PVE
::Cluster
::check_vmid_unused
($vmid, $allow_existing);
231 my $conf = eval { $class->load_config($vmid) } || {};
232 $class->check_lock($conf);
233 $conf->{lock} = $lock // 'create';
234 $class->write_config($vmid, $conf);
238 # destroys configuration, only applyable for configs owned by the callers node.
239 # dies if removal fails, e.g., when inquorate.
241 my ($class, $vmid) = @_;
243 my $config_fn = $class->config_file($vmid, $nodename);
244 unlink $config_fn or die "failed to remove config file: $!\n";
247 # Lock config file using flock, run $code with @param, unlock config file.
248 # $timeout is the maximum time to aquire the flock
249 # $shared eq 1 creates a non-exclusive ("read") flock
250 sub lock_config_mode
{
251 my ($class, $vmid, $timeout, $shared, $code, @param) = @_;
253 my $filename = $class->config_file_lock($vmid);
255 my $res = lock_file_full
($filename, $timeout, $shared, $code, @param);
262 # Lock config file using flock, run $code with @param, unlock config file.
264 my ($class, $vmid, $code, @param) = @_;
266 return $class->lock_config_full($vmid, 10, $code, @param);
269 # Checks whether the config is locked with the lock parameter
271 my ($class, $conf) = @_;
273 die $class->guest_type()." is locked ($conf->{lock})\n" if $conf->{lock};
276 # Returns whether the config is locked with the lock parameter, also checks
277 # whether the lock value is correct if the optional $lock is set.
279 my ($class, $conf, $lock) = @_;
281 return $conf->{lock} && (!defined($lock) || $lock eq $conf->{lock});
284 # Sets the lock parameter for this VM/CT's config to $lock.
286 my ($class, $vmid, $lock) = @_;
289 $class->lock_config($vmid, sub {
290 $conf = $class->load_config($vmid);
291 $class->check_lock($conf);
292 $conf->{lock} = $lock;
293 $class->write_config($vmid, $conf);
298 # Removes the lock parameter for this VM/CT's config, also checks whether
299 # the lock value is correct if the optional $lock is set.
301 my ($class, $vmid, $lock) = @_;
303 $class->lock_config($vmid, sub {
304 my $conf = $class->load_config($vmid);
305 if (!$conf->{lock}) {
306 my $lockstring = defined($lock) ?
"'$lock' " : "any";
307 die "no lock found trying to remove $lockstring lock\n";
308 } elsif (defined($lock) && $conf->{lock} ne $lock) {
309 die "found lock '$conf->{lock}' trying to remove '$lock' lock\n";
311 delete $conf->{lock};
312 $class->write_config($vmid, $conf);
316 # Checks whether protection mode is enabled for this VM/CT.
317 sub check_protection
{
318 my ($class, $conf, $err_msg) = @_;
320 if ($conf->{protection
}) {
321 die "$err_msg - protection mode enabled\n";
325 # Adds an unused volume to $config, if possible.
326 sub add_unused_volume
{
327 my ($class, $config, $volid) = @_;
330 for (my $ind = $class->__config_max_unused_disks() - 1; $ind >= 0; $ind--) {
331 my $test = "unused$ind";
332 if (my $vid = $config->{$test}) {
333 return if $vid eq $volid; # do not add duplicates
339 die "Too many unused volumes - please delete them first.\n" if !$key;
341 $config->{$key} = $volid;
346 # Returns whether the template parameter is set in $conf.
348 my ($class, $conf) = @_;
350 return 1 if defined $conf->{template
} && $conf->{template
} == 1;
353 # Checks whether $feature is availabe for the referenced volumes in $conf.
354 # Note: depending on the parameters, some volumes may be skipped!
356 my ($class, $feature, $conf, $storecfg, $snapname, $running, $backup_only) = @_;
357 die "implement me - abstract method\n";
360 # get all replicatable volume (hash $res->{$volid} = 1)
361 # $cleanup: for cleanup - simply ignores volumes without replicate feature
362 # $norerr: never raise exceptions - return undef instead
363 sub get_replicatable_volumes
{
364 my ($class, $storecfg, $vmid, $conf, $cleanup, $noerr) = @_;
366 die "implement me - abstract method\n";
371 # NOTE: Snapshot create/delete involves several non-atomic
372 # actions, and can take a long time.
373 # So we try to avoid locking the file and use the 'lock' variable
374 # inside the config file instead.
376 # Save the vmstate (RAM).
377 sub __snapshot_save_vmstate
{
378 my ($class, $vmid, $conf, $snapname, $storecfg) = @_;
379 die "implement me - abstract method\n";
382 # Check whether the VM/CT is running.
383 sub __snapshot_check_running
{
384 my ($class, $vmid) = @_;
385 die "implement me - abstract method\n";
388 # Check whether we need to freeze the VM/CT
389 sub __snapshot_check_freeze_needed
{
390 my ($sself, $vmid, $config, $save_vmstate) = @_;
391 die "implement me - abstract method\n";
394 # Freeze or unfreeze the VM/CT.
395 sub __snapshot_freeze
{
396 my ($class, $vmid, $unfreeze) = @_;
398 die "abstract method - implement me\n";
401 # Code run before and after creating all the volume snapshots
403 sub __snapshot_create_vol_snapshots_hook
{
404 my ($class, $vmid, $snap, $running, $hook) = @_;
409 # Create the volume snapshots for the VM/CT.
410 sub __snapshot_create_vol_snapshot
{
411 my ($class, $vmid, $vs, $volume, $snapname) = @_;
413 die "abstract method - implement me\n";
416 # Remove a drive from the snapshot config.
417 sub __snapshot_delete_remove_drive
{
418 my ($class, $snap, $drive) = @_;
420 die "abstract method - implement me\n";
423 # Delete the vmstate file/drive
424 sub __snapshot_delete_vmstate_file
{
425 my ($class, $snap, $force) = @_;
427 die "abstract method - implement me\n";
430 # Delete a volume snapshot
431 sub __snapshot_delete_vol_snapshot
{
432 my ($class, $vmid, $vs, $volume, $snapname) = @_;
434 die "abstract method - implement me\n";
437 # called during rollback prepare, and between config rollback and starting guest
438 # can change config, e.g. for vmgenid
439 # $data is shared across calls and passed to vm_start
440 sub __snapshot_rollback_hook
{
441 my ($class, $vmid, $conf, $snap, $prepare, $data) = @_;
446 # Checks whether a volume snapshot is possible for this volume.
447 sub __snapshot_rollback_vol_possible
{
448 my ($class, $volume, $snapname) = @_;
450 die "abstract method - implement me\n";
453 # Rolls back this volume.
454 sub __snapshot_rollback_vol_rollback
{
455 my ($class, $volume, $snapname) = @_;
457 die "abstract method - implement me\n";
460 # Stops the VM/CT for a rollback.
461 sub __snapshot_rollback_vm_stop
{
462 my ($class, $vmid) = @_;
464 die "abstract method - implement me\n";
467 # Start the VM/CT after a rollback with restored vmstate.
468 sub __snapshot_rollback_vm_start
{
469 my ($class, $vmid, $vmstate, $data);
471 die "abstract method - implement me\n";
474 # Get list of volume IDs which are referenced in $conf, but not in $snap.
475 sub __snapshot_rollback_get_unused
{
476 my ($class, $conf, $snap) = @_;
478 die "abstract method - implement me\n";
481 # Iterate over all configured volumes, calling $func for each key/value pair.
482 sub __snapshot_foreach_volume
{
483 my ($class, $conf, $func) = @_;
485 die "abstract method - implement me\n";
488 # Copy the current config $source to the snapshot config $dest
489 sub __snapshot_copy_config
{
490 my ($class, $source, $dest) = @_;
492 foreach my $k (keys %$source) {
493 next if $k eq 'snapshots';
494 next if $k eq 'snapstate';
495 next if $k eq 'snaptime';
496 next if $k eq 'vmstate';
497 next if $k eq 'lock';
498 next if $k eq 'digest';
499 next if $k eq 'description';
500 next if $k =~ m/^unused\d+$/;
502 $dest->{$k} = $source->{$k};
506 # Apply the snapshot config $snap to the config $conf (rollback)
507 sub __snapshot_apply_config
{
508 my ($class, $conf, $snap) = @_;
512 snapshots
=> $conf->{snapshots
},
515 # keep description and list of unused disks
516 foreach my $k (keys %$conf) {
517 next if !($k =~ m/^unused\d+$/ || $k eq 'description');
519 $newconf->{$k} = $conf->{$k};
522 $class->__snapshot_copy_config($snap, $newconf);
527 # Prepares the configuration for snapshotting.
528 sub __snapshot_prepare
{
529 my ($class, $vmid, $snapname, $save_vmstate, $comment) = @_;
535 my $conf = $class->load_config($vmid);
537 die "you can't take a snapshot if it's a template\n"
538 if $class->is_template($conf);
540 $class->check_lock($conf);
542 $conf->{lock} = 'snapshot';
544 die "snapshot name '$snapname' already used\n"
545 if defined($conf->{snapshots
}->{$snapname});
547 my $storecfg = PVE
::Storage
::config
();
548 die "snapshot feature is not available\n"
549 if !$class->has_feature('snapshot', $conf, $storecfg, undef, undef, $snapname eq 'vzdump');
551 $snap = $conf->{snapshots
}->{$snapname} = {};
553 if ($save_vmstate && $class->__snapshot_check_running($vmid)) {
554 $class->__snapshot_save_vmstate($vmid, $conf, $snapname, $storecfg);
557 $class->__snapshot_copy_config($conf, $snap);
559 $snap->{snapstate
} = "prepare";
560 $snap->{snaptime
} = time();
561 $snap->{description
} = $comment if $comment;
563 $class->write_config($vmid, $conf);
566 $class->lock_config($vmid, $updatefn);
571 # Commits the configuration after snapshotting.
572 sub __snapshot_commit
{
573 my ($class, $vmid, $snapname) = @_;
577 my $conf = $class->load_config($vmid);
579 die "missing snapshot lock\n"
580 if !($conf->{lock} && $conf->{lock} eq 'snapshot');
582 my $snap = $conf->{snapshots
}->{$snapname};
583 die "snapshot '$snapname' does not exist\n" if !defined($snap);
585 die "wrong snapshot state\n"
586 if !($snap->{snapstate
} && $snap->{snapstate
} eq "prepare");
588 delete $snap->{snapstate
};
589 delete $conf->{lock};
591 $conf->{parent
} = $snapname;
593 $class->write_config($vmid, $conf);
596 $class->lock_config($vmid, $updatefn);
599 # Creates a snapshot for the VM/CT.
600 sub snapshot_create
{
601 my ($class, $vmid, $snapname, $save_vmstate, $comment) = @_;
603 my $snap = $class->__snapshot_prepare($vmid, $snapname, $save_vmstate, $comment);
605 $save_vmstate = 0 if !$snap->{vmstate
};
607 my $conf = $class->load_config($vmid);
609 my ($running, $freezefs) = $class->__snapshot_check_freeze_needed($vmid, $conf, $snap->{vmstate
});
615 $class->__snapshot_freeze($vmid, 0);
618 $class->__snapshot_create_vol_snapshots_hook($vmid, $snap, $running, "before");
620 $class->__snapshot_foreach_volume($snap, sub {
621 my ($vs, $volume) = @_;
623 $class->__snapshot_create_vol_snapshot($vmid, $vs, $volume, $snapname);
624 $drivehash->{$vs} = 1;
630 $class->__snapshot_create_vol_snapshots_hook($vmid, $snap, $running, "after");
632 $class->__snapshot_freeze($vmid, 1);
634 $class->__snapshot_create_vol_snapshots_hook($vmid, $snap, $running, "after-unfreeze");
638 warn "snapshot create failed: starting cleanup\n";
639 eval { $class->snapshot_delete($vmid, $snapname, 1, $drivehash); };
644 $class->__snapshot_commit($vmid, $snapname);
647 # Deletes a snapshot.
648 # Note: $drivehash is only set when called from snapshot_create.
649 sub snapshot_delete
{
650 my ($class, $vmid, $snapname, $force, $drivehash) = @_;
656 my $conf = $class->load_config($vmid);
657 my $snap = $conf->{snapshots
}->{$snapname};
659 die "snapshot '$snapname' does not exist\n" if !defined($snap);
661 $class->set_lock($vmid, 'snapshot-delete')
662 if (!$drivehash); # doesn't already have a 'snapshot' lock
664 my $unlink_parent = sub {
665 my ($confref, $new_parent) = @_;
667 if ($confref->{parent
} && $confref->{parent
} eq $snapname) {
669 $confref->{parent
} = $new_parent;
671 delete $confref->{parent
};
676 my $remove_drive = sub {
679 my $conf = $class->load_config($vmid);
680 $snap = $conf->{snapshots
}->{$snapname};
681 die "snapshot '$snapname' does not exist\n" if !defined($snap);
683 $class->__snapshot_delete_remove_drive($snap, $drive);
685 $class->write_config($vmid, $conf);
689 $class->lock_config($vmid, sub {
690 my $conf = $class->load_config($vmid);
692 die "you can't delete a snapshot if vm is a template\n"
693 if $class->is_template($conf);
695 $snap = $conf->{snapshots
}->{$snapname};
696 die "snapshot '$snapname' does not exist\n" if !defined($snap);
698 $snap->{snapstate
} = 'delete';
700 $class->write_config($vmid, $conf);
703 # now remove vmstate file
704 if ($snap->{vmstate
}) {
705 $class->__snapshot_delete_vmstate_file($snap, $force);
707 # save changes (remove vmstate from snapshot)
708 $class->lock_config($vmid, $remove_drive, 'vmstate') if !$force;
711 # now remove all volume snapshots
712 $class->__snapshot_foreach_volume($snap, sub {
713 my ($vs, $volume) = @_;
715 return if $snapname eq 'vzdump' && $vs ne 'rootfs' && !$volume->{backup
};
716 if (!$drivehash || $drivehash->{$vs}) {
717 eval { $class->__snapshot_delete_vol_snapshot($vmid, $vs, $volume, $snapname, $unused); };
724 # save changes (remove drive from snapshot)
725 $class->lock_config($vmid, $remove_drive, $vs) if !$force;
729 $class->lock_config($vmid, sub {
730 my $conf = $class->load_config($vmid);
731 $snap = $conf->{snapshots
}->{$snapname};
732 die "snapshot '$snapname' does not exist\n" if !defined($snap);
735 &$unlink_parent($conf, $snap->{parent
});
736 foreach my $sn (keys %{$conf->{snapshots
}}) {
737 next if $sn eq $snapname;
738 &$unlink_parent($conf->{snapshots
}->{$sn}, $snap->{parent
});
742 delete $conf->{snapshots
}->{$snapname};
743 delete $conf->{lock};
744 foreach my $volid (@$unused) {
745 $class->add_unused_volume($conf, $volid);
748 $class->write_config($vmid, $conf);
752 # Rolls back to a given snapshot.
753 sub snapshot_rollback
{
754 my ($class, $vmid, $snapname) = @_;
758 my $storecfg = PVE
::Storage
::config
();
760 my $conf = $class->load_config($vmid);
762 my $get_snapshot_config = sub {
764 die "you can't rollback if vm is a template\n" if $class->is_template($conf);
766 my $res = $conf->{snapshots
}->{$snapname};
768 die "snapshot '$snapname' does not exist\n" if !defined($res);
773 my $repl_conf = PVE
::ReplicationConfig-
>new();
774 if ($repl_conf->check_for_existing_jobs($vmid, 1)) {
775 # remove all replication snapshots
776 my $volumes = $class->get_replicatable_volumes($storecfg, $vmid, $conf, 1);
777 my $sorted_volids = [ sort keys %$volumes ];
779 # remove all local replication snapshots (jobid => undef)
780 my $logfunc = sub { my $line = shift; chomp $line; print "$line\n"; };
781 PVE
::Replication
::prepare
($storecfg, $sorted_volids, undef, 0, undef, $logfunc);
784 my $snap = &$get_snapshot_config();
786 $class->__snapshot_foreach_volume($snap, sub {
787 my ($vs, $volume) = @_;
789 $class->__snapshot_rollback_vol_possible($volume, $snapname);
796 $conf = $class->load_config($vmid);
798 $snap = &$get_snapshot_config();
800 die "unable to rollback to incomplete snapshot (snapstate = $snap->{snapstate})\n"
801 if $snap->{snapstate
};
804 $class->check_lock($conf);
805 $class->__snapshot_rollback_vm_stop($vmid);
808 die "unable to rollback vm $vmid: vm is running\n"
809 if $class->__snapshot_check_running($vmid);
812 $conf->{lock} = 'rollback';
814 die "got wrong lock\n" if !($conf->{lock} && $conf->{lock} eq 'rollback');
815 delete $conf->{lock};
817 my $unused = $class->__snapshot_rollback_get_unused($conf, $snap);
819 foreach my $volid (@$unused) {
820 $class->add_unused_volume($conf, $volid);
823 # copy snapshot config to current config
824 $conf = $class->__snapshot_apply_config($conf, $snap);
825 $conf->{parent
} = $snapname;
828 $class->__snapshot_rollback_hook($vmid, $conf, $snap, $prepare, $data);
830 $class->write_config($vmid, $conf);
832 if (!$prepare && $snap->{vmstate
}) {
833 $class->__snapshot_rollback_vm_start($vmid, $snap->{vmstate
}, $data);
837 $class->lock_config($vmid, $updatefn);
839 $class->__snapshot_foreach_volume($snap, sub {
840 my ($vs, $volume) = @_;
842 $class->__snapshot_rollback_vol_rollback($volume, $snapname);
846 $class->lock_config($vmid, $updatefn);
849 # bash completion helper
852 my ($class, $vmid) = @_;
854 my $snapshot = eval {
855 my $conf = $class->load_config($vmid);
856 my $snapshots = $conf->{snapshots
} || [];
857 [ sort keys %$snapshots ]