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58 RT::Shredder - Permanently wipeout data from RT
65 rt-shredder --force --plugin 'Tickets=query,Queue="General" and Status="deleted"'
69 RT::Shredder is extension to RT which allows you to permanently wipeout
70 data from the RT database. Shredder supports the wiping of almost
71 all RT objects (Tickets, Transactions, Attachments, Users...).
74 =head2 "Delete" vs "Wipeout"
76 RT uses the term "delete" to mean "deactivate". To avoid confusion,
77 RT::Shredder uses the term "Wipeout" to mean "permanently erase" (or
78 what most people would think of as "delete").
81 =head2 Why do you want this?
83 Normally in RT, "deleting" an item simply deactivates it and makes it
84 invisible from view. This is done to retain full history and
85 auditability of your tickets. For most RT users this is fine and they
86 have no need of RT::Shredder.
88 But in some large and heavily used RT instances the database can get
89 clogged up with junk, particularly spam. This can slow down searches
90 and bloat the size of the database. For these users, RT::Shredder
91 allows them to completely clear the database of this unwanted junk.
93 An additional use of Shredder is to obliterate sensitive information
94 (passwords, credit card numbers, ...) which might have made their way
98 =head2 Command line tools (CLI)
100 L<rt-shredder> is a program which allows you to wipe objects from
101 command line or with system tasks scheduler (cron, for example).
102 See also 'rt-shredder --help'.
105 =head2 Web based interface (WebUI)
107 Shredder's WebUI integrates into RT's WebUI. You can find it in the
108 Admin->Tools->Shredder tab. The interface is similar to the
109 CLI and gives you the same functionality. You can find 'Shredder' link
110 at the bottom of tickets search results, so you could wipeout tickets
111 in the way similar to the bulk update.
114 =head1 DATA STORAGE AND BACKUPS
116 Shredder allows you to store data you wiped in files as scripts with SQL
119 =head3 Restoring from backup
121 Should you wipeout something you did not intend to the objects can be
122 restored by using the storage files. These files are a simple set of
123 SQL commands to re-insert your objects into the RT database.
125 1) Locate the appropriate shredder SQL dump file. In the WebUI, when
126 you use shredder, the path to the dump file is displayed. It also
127 gives the option to download the dump file after each wipeout. Or
128 it can be found in your C<$ShredderStoragePath>.
130 2) Load the shredder SQL dump into your RT database. The details will
131 be different for each database and RT configuration, consult your
132 database manual and RT config. For example, in MySQL...
134 mysql -u your_rt_user -p your_rt_database < /path/to/rt/var/data/shredder/dump.sql
136 That's it.i This will restore everything you'd deleted during a
137 shredding session when the file had been created.
141 =head2 $DependenciesLimit
143 Shredder stops with an error if the object has more than
144 C<$DependenciesLimit> dependencies. For example: a ticket has 1000
145 transactions or a transaction has 1000 attachments. This is protection
146 from bugs in shredder from wiping out your whole database, but
147 sometimes when you have big mail loops you may hit it.
149 Defaults to 1000. To change this (for example, to 10000) add the
150 following to your F<RT_SiteConfig.pm>:
152 Set( $DependenciesLimit, 10_000 );>
155 =head2 $ShredderStoragePath
157 Directory containing Shredder backup dumps; defaults to
158 F</opt/rt4/var/data/RT-Shredder> (assuming an /opt/rt4 installation).
160 To change this (for example, to /some/backup/path) add the following to
161 your F<RT_SiteConfig.pm>:
163 Set( $ShredderStoragePath, "/some/backup/path" );>
165 Be sure to specify an absolute path.
167 =head1 Database Indexes
169 We have found that the following indexes significantly speed up
170 shredding on most databases.
172 CREATE INDEX SHREDDER_CGM1 ON CachedGroupMembers(MemberId, GroupId, Disabled);
173 CREATE INDEX SHREDDER_CGM2 ON CachedGroupMembers(ImmediateParentId,MemberId);
174 CREATE INDEX SHREDDER_CGM3 on CachedGroupMembers (Via, Id);
176 CREATE UNIQUE INDEX SHREDDER_GM1 ON GroupMembers(MemberId, GroupId);
178 CREATE INDEX SHREDDER_TXN1 ON Transactions(ReferenceType, OldReference);
179 CREATE INDEX SHREDDER_TXN2 ON Transactions(ReferenceType, NewReference);
180 CREATE INDEX SHREDDER_TXN3 ON Transactions(Type, OldValue);
181 CREATE INDEX SHREDDER_TXN4 ON Transactions(Type, NewValue);
183 CREATE INDEX SHREDDER_ATTACHMENTS1 ON Attachments(Creator);
185 =head1 INFORMATION FOR DEVELOPERS
189 L<RT::Shredder> is an extension to RT which adds shredder methods to
190 RT objects and classes. The API is not well documented yet, but you
191 can find usage examples in L<rt-shredder> and the
192 F<lib/t/regression/shredder/*.t> test files.
194 However, here is a small example that do the same action as in CLI
195 example from L</SYNOPSIS>:
198 RT::Shredder::Init( force => 1 );
199 my $deleted = RT::Tickets->new( RT->SystemUser );
200 $deleted->{'allow_deleted_search'} = 1;
201 $deleted->LimitQueue( VALUE => 'general' );
202 $deleted->LimitStatus( VALUE => 'deleted' );
203 while( my $t = $deleted->Next ) {
208 =head2 RT::Shredder class' API
210 L<RT::Shredder> implements interfaces to objects cache, actions on the
211 objects in the cache and backups storage.
219 # I can't use 'use lib' here since it breakes tests
220 # because test suite uses old RT::Shredder setup from
223 ### after: push @INC, qw(@RT_LIB_PATH@);
224 use RT::Shredder::Constants;
225 use RT::Shredder::Exceptions;
228 our @SUPPORTED_OBJECTS = qw(
243 ObjectCustomFieldValue
253 RT::Shredder::Init( %default_options );
255 C<RT::Shredder::Init()> should be called before creating an
256 RT::Shredder object. It iniitalizes RT and loads the RT
259 %default_options are passed to every C<<RT::Shredder->new>> call.
275 my $shredder = RT::Shredder->new(%options);
277 Construct a new RT::Shredder object.
279 There currently are no %options.
286 my $self = bless( {}, ref $proto || $proto );
287 return $self->_Init( @_ );
293 $self->{'opt'} = { %opt, @_ };
294 $self->{'cache'} = {};
295 $self->{'resolver'} = {};
296 $self->{'dump_plugins'} = [];
300 =head4 CastObjectsToRecords( Objects => undef )
302 Cast objects to the C<RT::Record> objects or its ancesstors.
303 Objects can be passed as SCALAR (format C<< <class>-<id> >>),
304 ARRAY, C<RT::Record> ancesstors or C<RT::SearchBuilder> ancesstor.
306 Most methods that takes C<Objects> argument use this method to
307 cast argument value to list of records.
309 Returns an array of records.
313 my @objs = $shredder->CastObjectsToRecords(
314 Objects => [ # ARRAY reference
315 'RT::Attachment-10', # SCALAR or SCALAR reference
316 $tickets, # RT::Tickets object (isa RT::SearchBuilder)
317 $user, # RT::User object (isa RT::Record)
323 sub CastObjectsToRecords
326 my %args = ( Objects => undef, @_ );
329 my $targets = delete $args{'Objects'};
331 RT::Shredder::Exception->throw( "Undefined Objects argument" );
334 if( UNIVERSAL::isa( $targets, 'RT::SearchBuilder' ) ) {
335 #XXX: try to use ->_DoSearch + ->ItemsArrayRef in feature
336 # like we do in Record with links, but change only when
337 # more tests would be available
338 while( my $tmp = $targets->Next ) { push @res, $tmp };
339 } elsif ( UNIVERSAL::isa( $targets, 'RT::Record' ) ) {
341 } elsif ( UNIVERSAL::isa( $targets, 'ARRAY' ) ) {
342 foreach( @$targets ) {
343 push @res, $self->CastObjectsToRecords( Objects => $_ );
345 } elsif ( UNIVERSAL::isa( $targets, 'SCALAR' ) || !ref $targets ) {
346 $targets = $$targets if ref $targets;
347 my ($class, $org, $id);
348 if ($targets =~ /-.*-/) {
349 ($class, $org, $id) = split /-/, $targets;
350 RT::Shredder::Exception->throw( "Can't wipeout remote object $targets" )
351 unless $org eq RT->Config->Get('Organization');
353 ($class, $id) = split /-/, $targets;
355 RT::Shredder::Exception->throw( "Unsupported class $class" )
356 unless $class =~ /^\w+(::\w+)*$/;
357 $class = 'RT::'. $class unless $class =~ /^RTx?::/i;
358 $class->require or die "Failed to load $class: $@";
359 my $obj = $class->new( RT->SystemUser );
360 die "Couldn't construct new '$class' object" unless $obj;
362 unless ( $obj->id ) {
363 $RT::Logger->error( "Couldn't load '$class' object with id '$id'" );
364 RT::Shredder::Exception::Info->throw( 'CouldntLoadObject' );
366 die "Loaded object has different id" unless( $id eq $obj->id );
369 RT::Shredder::Exception->throw( "Unsupported type ". ref $targets );
376 =head4 PutObjects( Objects => undef )
378 Puts objects into cache.
380 Returns array of the cache entries.
382 See C<CastObjectsToRecords> method for supported types of the C<Objects>
390 my %args = ( Objects => undef, @_ );
393 for( $self->CastObjectsToRecords( Objects => delete $args{'Objects'} ) ) {
394 push @res, $self->PutObject( %args, Object => $_ )
400 =head4 PutObject( Object => undef )
402 Puts record object into cache and returns its cache entry.
404 B<NOTE> that this method support B<only C<RT::Record> object or its ancesstor
405 objects>, if you want put mutliple objects or objects represented by different
406 classes then use C<PutObjects> method instead.
413 my %args = ( Object => undef, @_ );
415 my $obj = $args{'Object'};
416 unless( UNIVERSAL::isa( $obj, 'RT::Record' ) ) {
417 RT::Shredder::Exception->throw( "Unsupported type '". (ref $obj || $obj || '(undef)')."'" );
421 return ($self->{'cache'}->{ $str } ||= {
422 State => RT::Shredder::Constants::ON_STACK,
427 =head4 GetObject, GetState, GetRecord( String => ''| Object => '' )
429 Returns record object from cache, cache entry state or cache entry accordingly.
431 All three methods takes C<String> (format C<< <class>-<id> >>) or C<Object> argument.
432 C<String> argument has more priority than C<Object> so if it's not empty then methods
433 leave C<Object> argument unchecked.
435 You can read about possible states and their meanings in L<RT::Shredder::Constants> docs.
447 if( $args{'String'} && $args{'Object'} ) {
449 Carp::croak( "both String and Object args passed" );
451 return $args{'String'} if $args{'String'};
452 return $args{'Object'}->UID if UNIVERSAL::can($args{'Object'}, 'UID' );
456 sub GetObject { return (shift)->GetRecord( @_ )->{'Object'} }
457 sub GetState { return (shift)->GetRecord( @_ )->{'State'} }
461 my $str = $self->_ParseRefStrArgs( @_ );
462 return $self->{'cache'}->{ $str };
465 =head3 Dependencies resolvers
467 =head4 PutResolver, GetResolvers and ApplyResolvers
469 TODO: These methods have no documentation.
482 unless( UNIVERSAL::isa( $args{'Code'} => 'CODE' ) ) {
483 die "Resolver '$args{Code}' is not code reference";
488 $self->{'resolver'}->{ $args{'BaseClass'} } ||= {}
489 )->{ $args{'TargetClass'} || '' } ||= []
491 unshift @$resolvers, $args{'Code'};
505 if( $args{'TargetClass'} && exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} } ) {
506 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} || '' } };
508 if( exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ '' } ) {
509 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{''} };
518 my %args = ( Dependency => undef, @_ );
519 my $dep = $args{'Dependency'};
521 my @resolvers = $self->GetResolvers(
522 BaseClass => $dep->BaseClass,
523 TargetClass => $dep->TargetClass,
526 unless( @resolvers ) {
527 RT::Shredder::Exception::Info->throw(
529 error => "Couldn't find resolver for dependency '". $dep->AsString ."'",
534 BaseObject => $dep->BaseObject,
535 TargetObject => $dep->TargetObject,
536 ) foreach @resolvers;
545 foreach my $cache_val ( values %{ $self->{'cache'} } ) {
546 next if $cache_val->{'State'} & (RT::Shredder::Constants::WIPED | RT::Shredder::Constants::IN_WIPING);
547 $self->Wipeout( Object => $cache_val->{'Object'} );
557 die "Couldn't begin transaction" unless $RT::Handle->BeginTransaction;
558 $mark = $self->PushDumpMark or die "Couldn't get dump mark";
559 $self->_Wipeout( @_ );
560 $self->PopDumpMark( Mark => $mark );
561 die "Couldn't commit transaction" unless $RT::Handle->Commit;
565 $RT::Handle->Rollback('force');
566 $self->RollbackDumpTo( Mark => $mark ) if $mark;
567 die $error if RT::Shredder::Exception::Info->caught;
568 die "Couldn't wipeout object: $error";
576 my %args = ( CacheRecord => undef, Object => undef, @_ );
578 my $record = $args{'CacheRecord'};
579 $record = $self->PutObject( Object => $args{'Object'} ) unless $record;
580 return if $record->{'State'} & (RT::Shredder::Constants::WIPED | RT::Shredder::Constants::IN_WIPING);
582 $record->{'State'} |= RT::Shredder::Constants::IN_WIPING;
583 my $object = $record->{'Object'};
585 $self->DumpObject( Object => $object, State => 'before any action' );
587 unless( $object->BeforeWipeout ) {
588 RT::Shredder::Exception->throw( "BeforeWipeout check returned error" );
591 my $deps = $object->Dependencies( Shredder => $self );
593 WithFlags => RT::Shredder::Constants::DEPENDS_ON | RT::Shredder::Constants::VARIABLE,
594 Callback => sub { $self->ApplyResolvers( Dependency => $_[0] ) },
596 $self->DumpObject( Object => $object, State => 'after resolvers' );
599 WithFlags => RT::Shredder::Constants::DEPENDS_ON,
600 WithoutFlags => RT::Shredder::Constants::WIPE_AFTER | RT::Shredder::Constants::VARIABLE,
601 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
603 $self->DumpObject( Object => $object, State => 'after wiping dependencies' );
606 $record->{'State'} |= RT::Shredder::Constants::WIPED; delete $record->{'Object'};
607 $self->DumpObject( Object => $object, State => 'after wipeout' );
610 WithFlags => RT::Shredder::Constants::DEPENDS_ON | RT::Shredder::Constants::WIPE_AFTER,
611 WithoutFlags => RT::Shredder::Constants::VARIABLE,
612 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
614 $self->DumpObject( Object => $object, State => 'after late dependencies' );
619 =head3 Data storage and backups
621 =head4 GetFileName( FileName => '<ISO DATETIME>-XXXX.sql', FromStorage => 1 )
623 Takes desired C<FileName> and flag C<FromStorage> then translate file name to absolute
626 * Default value of the C<FileName> option is C<< <ISO DATETIME>-XXXX.sql >>;
628 * if C<FileName> has C<XXXX> (exactly four uppercase C<X> letters) then it would be changed with digits from 0000 to 9999 range, with first one free value;
630 * if C<FileName> has C<%T> then it would be replaced with the current date and time in the C<YYYY-MM-DDTHH:MM:SS> format. Note that using C<%t> may still generate not unique names, using C<XXXX> recomended.
632 * if C<FromStorage> argument is true (default behaviour) then result path would always be relative to C<StoragePath>;
634 * if C<FromStorage> argument is false then result would be relative to the current dir unless it's already absolute path.
636 Returns an absolute path of the file.
639 # file from storage with default name format
640 my $fname = $shredder->GetFileName;
642 # file from storage with custom name format
643 my $fname = $shredder->GetFileName( FileName => 'shredder-XXXX.backup' );
645 # file with path relative to the current dir
646 my $fname = $shredder->GetFileName(
648 FileName => 'backups/shredder.sql',
651 # file with absolute path
652 my $fname = $shredder->GetFileName(
654 FileName => '/var/backups/shredder-XXXX.sql'
662 my %args = ( FileName => '', FromStorage => 1, @_ );
665 my $file = $args{'FileName'} || '%t-XXXX.sql';
666 if( $file =~ /\%t/i ) {
668 my $date_time = POSIX::strftime( "%Y%m%dT%H%M%S", gmtime );
669 $file =~ s/\%t/$date_time/gi;
672 # convert to absolute path
673 if( $args{'FromStorage'} ) {
674 $file = File::Spec->catfile( $self->StoragePath, $file );
675 } elsif( !File::Spec->file_name_is_absolute( $file ) ) {
676 $file = File::Spec->rel2abs( $file );
680 if( $file =~ /XXXX[^\/\\]*$/ ) {
681 my( $tmp, $i ) = ( $file, 0 );
685 $tmp =~ s/XXXX([^\/\\]*)$/sprintf("%04d", $i).$1/e;
686 } while( -e $tmp && $i < 9999 );
692 die "File '$file' exists, but is read-only";
695 unless( File::Spec->file_name_is_absolute( $file ) ) {
696 $file = File::Spec->rel2abs( $file );
700 my $dir = File::Spec->join( (File::Spec->splitpath( $file ))[0,1] );
701 unless( -e $dir && -d _) {
702 die "Base directory '$dir' for file '$file' doesn't exist";
705 die "Base directory '$dir' is not writable";
708 die "'$file' is not regular file";
716 Returns an absolute path to the storage dir. See
717 L</$ShredderStoragePath>.
719 See also description of the L</GetFileName> method.
725 return scalar( RT->Config->Get('ShredderStoragePath') )
726 || File::Spec->catdir( $RT::VarPath, qw(data RT-Shredder) );
729 my %active_dump_state = ();
732 my %args = ( Object => undef, Name => 'SQLDump', Arguments => undef, @_ );
734 my $plugin = $args{'Object'};
736 require RT::Shredder::Plugin;
737 $plugin = RT::Shredder::Plugin->new;
738 my( $status, $msg ) = $plugin->LoadByName( $args{'Name'} );
739 die "Couldn't load dump plugin: $msg\n" unless $status;
741 die "Plugin is not of correct type" unless lc $plugin->Type eq 'dump';
743 if ( my $pargs = $args{'Arguments'} ) {
744 my ($status, $msg) = $plugin->TestArgs( %$pargs );
745 die "Couldn't set plugin args: $msg\n" unless $status;
748 my @applies_to = $plugin->AppliesToStates;
749 die "Plugin doesn't apply to any state" unless @applies_to;
750 $active_dump_state{ lc $_ } = 1 foreach @applies_to;
752 push @{ $self->{'dump_plugins'} }, $plugin;
759 my %args = (Object => undef, State => undef, @_);
760 die "No state passed" unless $args{'State'};
761 return unless $active_dump_state{ lc $args{'State'} };
763 foreach (@{ $self->{'dump_plugins'} }) {
764 next unless grep lc $args{'State'} eq lc $_, $_->AppliesToStates;
765 my ($state, $msg) = $_->Run( %args );
766 die "Couldn't run plugin: $msg" unless $state;
771 { my $mark = 1; # XXX: integer overflows?
775 foreach (@{ $self->{'dump_plugins'} }) {
776 my ($state, $msg) = $_->PushMark( Mark => $mark );
777 die "Couldn't push mark: $msg" unless $state;
783 foreach (@{ $self->{'dump_plugins'} }) {
784 my ($state, $msg) = $_->PopMark( @_ );
785 die "Couldn't pop mark: $msg" unless $state;
791 foreach (@{ $self->{'dump_plugins'} }) {
792 my ($state, $msg) = $_->RollbackTo( @_ );
793 die "Couldn't rollback to mark: $msg" unless $state;
804 =head2 Database transactions support
806 Since 0.03_01 RT::Shredder uses database transactions and should be
807 much safer to run on production servers.
811 Mainstream RT doesn't use FKs, but at least I posted DDL script that creates them
812 in mysql DB, note that if you use FKs then this two valid keys don't allow delete
813 Tickets because of bug in MySQL:
815 ALTER TABLE Tickets ADD FOREIGN KEY (EffectiveId) REFERENCES Tickets(id);
816 ALTER TABLE CachedGroupMembers ADD FOREIGN KEY (Via) REFERENCES CachedGroupMembers(id);
818 L<http://bugs.mysql.com/bug.php?id=4042>
820 =head1 BUGS AND HOW TO CONTRIBUTE
822 We need your feedback in all cases: if you use it or not,
823 is it works for you or not.
827 Don't skip C<make test> step while install and send me reports if it's fails.
828 Add your own tests, it's easy enough if you've writen at list one perl script
829 that works with RT. Read more about testing in F<t/utils.pl>.
833 Send reports to L</AUTHOR> or to the RT mailing lists.
837 Many bugs in the docs: insanity, spelling, gramar and so on.
838 Patches are wellcome.
842 Please, see Todo file, it has some technical notes
843 about what I plan to do, when I'll do it, also it
844 describes some problems code has.
848 Since RT-3.7 shredder is a part of the RT distribution.
849 Versions of the RTx::Shredder extension could
850 be downloaded from the CPAN. Those work with older
851 RT versions or you can find repository at
852 L<https://opensvn.csie.org/rtx_shredder>
856 Ruslan U. Zakirov <Ruslan.Zakirov@gmail.com>
860 This program is free software; you can redistribute
861 it and/or modify it under the same terms as Perl itself.
863 The full text of the license can be found in the
868 L<rt-shredder>, L<rt-validator>