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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;
229 require RT::Shredder::Record;
231 require RT::Shredder::ACE;
232 require RT::Shredder::Attachment;
233 require RT::Shredder::CachedGroupMember;
234 require RT::Shredder::CustomField;
235 require RT::Shredder::CustomFieldValue;
236 require RT::Shredder::GroupMember;
237 require RT::Shredder::Group;
238 require RT::Shredder::Link;
239 require RT::Shredder::Principal;
240 require RT::Shredder::Queue;
241 require RT::Shredder::Scrip;
242 require RT::Shredder::ScripAction;
243 require RT::Shredder::ScripCondition;
244 require RT::Shredder::Template;
245 require RT::Shredder::ObjectCustomFieldValue;
246 require RT::Shredder::Ticket;
247 require RT::Shredder::Transaction;
248 require RT::Shredder::User;
251 our @SUPPORTED_OBJECTS = qw(
266 ObjectCustomFieldValue
276 RT::Shredder::Init( %default_options );
278 C<RT::Shredder::Init()> should be called before creating an
279 RT::Shredder object. It iniitalizes RT and loads the RT
282 %default_options are passed to every C<<RT::Shredder->new>> call.
298 my $shredder = RT::Shredder->new(%options);
300 Construct a new RT::Shredder object.
302 There currently are no %options.
309 my $self = bless( {}, ref $proto || $proto );
310 return $self->_Init( @_ );
316 $self->{'opt'} = { %opt, @_ };
317 $self->{'cache'} = {};
318 $self->{'resolver'} = {};
319 $self->{'dump_plugins'} = [];
323 =head4 CastObjectsToRecords( Objects => undef )
325 Cast objects to the C<RT::Record> objects or its ancesstors.
326 Objects can be passed as SCALAR (format C<< <class>-<id> >>),
327 ARRAY, C<RT::Record> ancesstors or C<RT::SearchBuilder> ancesstor.
329 Most methods that takes C<Objects> argument use this method to
330 cast argument value to list of records.
332 Returns an array of records.
336 my @objs = $shredder->CastObjectsToRecords(
337 Objects => [ # ARRAY reference
338 'RT::Attachment-10', # SCALAR or SCALAR reference
339 $tickets, # RT::Tickets object (isa RT::SearchBuilder)
340 $user, # RT::User object (isa RT::Record)
346 sub CastObjectsToRecords
349 my %args = ( Objects => undef, @_ );
352 my $targets = delete $args{'Objects'};
354 RT::Shredder::Exception->throw( "Undefined Objects argument" );
357 if( UNIVERSAL::isa( $targets, 'RT::SearchBuilder' ) ) {
358 #XXX: try to use ->_DoSearch + ->ItemsArrayRef in feature
359 # like we do in Record with links, but change only when
360 # more tests would be available
361 while( my $tmp = $targets->Next ) { push @res, $tmp };
362 } elsif ( UNIVERSAL::isa( $targets, 'RT::Record' ) ) {
364 } elsif ( UNIVERSAL::isa( $targets, 'ARRAY' ) ) {
365 foreach( @$targets ) {
366 push @res, $self->CastObjectsToRecords( Objects => $_ );
368 } elsif ( UNIVERSAL::isa( $targets, 'SCALAR' ) || !ref $targets ) {
369 $targets = $$targets if ref $targets;
370 my ($class, $id) = split /-/, $targets;
371 RT::Shredder::Exception->throw( "Unsupported class $class" )
372 unless $class =~ /^\w+(::\w+)*$/;
373 $class = 'RT::'. $class unless $class =~ /^RTx?::/i;
374 $class->require or die "Failed to load $class: $@";
375 my $obj = $class->new( RT->SystemUser );
376 die "Couldn't construct new '$class' object" unless $obj;
378 unless ( $obj->id ) {
379 $RT::Logger->error( "Couldn't load '$class' object with id '$id'" );
380 RT::Shredder::Exception::Info->throw( 'CouldntLoadObject' );
382 die "Loaded object has different id" unless( $id eq $obj->id );
385 RT::Shredder::Exception->throw( "Unsupported type ". ref $targets );
392 =head4 PutObjects( Objects => undef )
394 Puts objects into cache.
396 Returns array of the cache entries.
398 See C<CastObjectsToRecords> method for supported types of the C<Objects>
406 my %args = ( Objects => undef, @_ );
409 for( $self->CastObjectsToRecords( Objects => delete $args{'Objects'} ) ) {
410 push @res, $self->PutObject( %args, Object => $_ )
416 =head4 PutObject( Object => undef )
418 Puts record object into cache and returns its cache entry.
420 B<NOTE> that this method support B<only C<RT::Record> object or its ancesstor
421 objects>, if you want put mutliple objects or objects represented by different
422 classes then use C<PutObjects> method instead.
429 my %args = ( Object => undef, @_ );
431 my $obj = $args{'Object'};
432 unless( UNIVERSAL::isa( $obj, 'RT::Record' ) ) {
433 RT::Shredder::Exception->throw( "Unsupported type '". (ref $obj || $obj || '(undef)')."'" );
436 my $str = $obj->_AsString;
437 return ($self->{'cache'}->{ $str } ||= { State => ON_STACK, Object => $obj } );
440 =head4 GetObject, GetState, GetRecord( String => ''| Object => '' )
442 Returns record object from cache, cache entry state or cache entry accordingly.
444 All three methods takes C<String> (format C<< <class>-<id> >>) or C<Object> argument.
445 C<String> argument has more priority than C<Object> so if it's not empty then methods
446 leave C<Object> argument unchecked.
448 You can read about possible states and their meanings in L<RT::Shredder::Constants> docs.
460 if( $args{'String'} && $args{'Object'} ) {
462 Carp::croak( "both String and Object args passed" );
464 return $args{'String'} if $args{'String'};
465 return $args{'Object'}->_AsString if UNIVERSAL::can($args{'Object'}, '_AsString' );
469 sub GetObject { return (shift)->GetRecord( @_ )->{'Object'} }
470 sub GetState { return (shift)->GetRecord( @_ )->{'State'} }
474 my $str = $self->_ParseRefStrArgs( @_ );
475 return $self->{'cache'}->{ $str };
478 =head3 Dependencies resolvers
480 =head4 PutResolver, GetResolvers and ApplyResolvers
482 TODO: These methods have no documentation.
495 unless( UNIVERSAL::isa( $args{'Code'} => 'CODE' ) ) {
496 die "Resolver '$args{Code}' is not code reference";
501 $self->{'resolver'}->{ $args{'BaseClass'} } ||= {}
502 )->{ $args{'TargetClass'} || '' } ||= []
504 unshift @$resolvers, $args{'Code'};
518 if( $args{'TargetClass'} && exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} } ) {
519 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} || '' } };
521 if( exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ '' } ) {
522 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{''} };
531 my %args = ( Dependency => undef, @_ );
532 my $dep = $args{'Dependency'};
534 my @resolvers = $self->GetResolvers(
535 BaseClass => $dep->BaseClass,
536 TargetClass => $dep->TargetClass,
539 unless( @resolvers ) {
540 RT::Shredder::Exception::Info->throw(
542 error => "Couldn't find resolver for dependency '". $dep->AsString ."'",
547 BaseObject => $dep->BaseObject,
548 TargetObject => $dep->TargetObject,
549 ) foreach @resolvers;
558 foreach my $cache_val ( values %{ $self->{'cache'} } ) {
559 next if $cache_val->{'State'} & (WIPED | IN_WIPING);
560 $self->Wipeout( Object => $cache_val->{'Object'} );
570 die "Couldn't begin transaction" unless $RT::Handle->BeginTransaction;
571 $mark = $self->PushDumpMark or die "Couldn't get dump mark";
572 $self->_Wipeout( @_ );
573 $self->PopDumpMark( Mark => $mark );
574 die "Couldn't commit transaction" unless $RT::Handle->Commit;
578 $RT::Handle->Rollback('force');
579 $self->RollbackDumpTo( Mark => $mark ) if $mark;
580 die $error if RT::Shredder::Exception::Info->caught;
581 die "Couldn't wipeout object: $error";
589 my %args = ( CacheRecord => undef, Object => undef, @_ );
591 my $record = $args{'CacheRecord'};
592 $record = $self->PutObject( Object => $args{'Object'} ) unless $record;
593 return if $record->{'State'} & (WIPED | IN_WIPING);
595 $record->{'State'} |= IN_WIPING;
596 my $object = $record->{'Object'};
598 $self->DumpObject( Object => $object, State => 'before any action' );
600 unless( $object->BeforeWipeout ) {
601 RT::Shredder::Exception->throw( "BeforeWipeout check returned error" );
604 my $deps = $object->Dependencies( Shredder => $self );
606 WithFlags => DEPENDS_ON | VARIABLE,
607 Callback => sub { $self->ApplyResolvers( Dependency => $_[0] ) },
609 $self->DumpObject( Object => $object, State => 'after resolvers' );
612 WithFlags => DEPENDS_ON,
613 WithoutFlags => WIPE_AFTER | VARIABLE,
614 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
616 $self->DumpObject( Object => $object, State => 'after wiping dependencies' );
619 $record->{'State'} |= WIPED; delete $record->{'Object'};
620 $self->DumpObject( Object => $object, State => 'after wipeout' );
623 WithFlags => DEPENDS_ON | WIPE_AFTER,
624 WithoutFlags => VARIABLE,
625 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
627 $self->DumpObject( Object => $object, State => 'after late dependencies' );
632 =head3 Data storage and backups
634 =head4 GetFileName( FileName => '<ISO DATETIME>-XXXX.sql', FromStorage => 1 )
636 Takes desired C<FileName> and flag C<FromStorage> then translate file name to absolute
639 * Default value of the C<FileName> option is C<< <ISO DATETIME>-XXXX.sql >>;
641 * 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;
643 * 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.
645 * if C<FromStorage> argument is true (default behaviour) then result path would always be relative to C<StoragePath>;
647 * if C<FromStorage> argument is false then result would be relative to the current dir unless it's already absolute path.
649 Returns an absolute path of the file.
652 # file from storage with default name format
653 my $fname = $shredder->GetFileName;
655 # file from storage with custom name format
656 my $fname = $shredder->GetFileName( FileName => 'shredder-XXXX.backup' );
658 # file with path relative to the current dir
659 my $fname = $shredder->GetFileName(
661 FileName => 'backups/shredder.sql',
664 # file with absolute path
665 my $fname = $shredder->GetFileName(
667 FileName => '/var/backups/shredder-XXXX.sql'
675 my %args = ( FileName => '', FromStorage => 1, @_ );
678 my $file = $args{'FileName'} || '%t-XXXX.sql';
679 if( $file =~ /\%t/i ) {
681 my $date_time = POSIX::strftime( "%Y%m%dT%H%M%S", gmtime );
682 $file =~ s/\%t/$date_time/gi;
685 # convert to absolute path
686 if( $args{'FromStorage'} ) {
687 $file = File::Spec->catfile( $self->StoragePath, $file );
688 } elsif( !File::Spec->file_name_is_absolute( $file ) ) {
689 $file = File::Spec->rel2abs( $file );
693 if( $file =~ /XXXX[^\/\\]*$/ ) {
694 my( $tmp, $i ) = ( $file, 0 );
698 $tmp =~ s/XXXX([^\/\\]*)$/sprintf("%04d", $i).$1/e;
699 } while( -e $tmp && $i < 9999 );
705 die "File '$file' exists, but is read-only";
708 unless( File::Spec->file_name_is_absolute( $file ) ) {
709 $file = File::Spec->rel2abs( $file );
713 my $dir = File::Spec->join( (File::Spec->splitpath( $file ))[0,1] );
714 unless( -e $dir && -d _) {
715 die "Base directory '$dir' for file '$file' doesn't exist";
718 die "Base directory '$dir' is not writable";
721 die "'$file' is not regular file";
729 Returns an absolute path to the storage dir. See
730 L</$ShredderStoragePath>.
732 See also description of the L</GetFileName> method.
738 return scalar( RT->Config->Get('ShredderStoragePath') )
739 || File::Spec->catdir( $RT::VarPath, qw(data RT-Shredder) );
742 my %active_dump_state = ();
745 my %args = ( Object => undef, Name => 'SQLDump', Arguments => undef, @_ );
747 my $plugin = $args{'Object'};
749 require RT::Shredder::Plugin;
750 $plugin = RT::Shredder::Plugin->new;
751 my( $status, $msg ) = $plugin->LoadByName( $args{'Name'} );
752 die "Couldn't load dump plugin: $msg\n" unless $status;
754 die "Plugin is not of correct type" unless lc $plugin->Type eq 'dump';
756 if ( my $pargs = $args{'Arguments'} ) {
757 my ($status, $msg) = $plugin->TestArgs( %$pargs );
758 die "Couldn't set plugin args: $msg\n" unless $status;
761 my @applies_to = $plugin->AppliesToStates;
762 die "Plugin doesn't apply to any state" unless @applies_to;
763 $active_dump_state{ lc $_ } = 1 foreach @applies_to;
765 push @{ $self->{'dump_plugins'} }, $plugin;
772 my %args = (Object => undef, State => undef, @_);
773 die "No state passed" unless $args{'State'};
774 return unless $active_dump_state{ lc $args{'State'} };
776 foreach (@{ $self->{'dump_plugins'} }) {
777 next unless grep lc $args{'State'} eq lc $_, $_->AppliesToStates;
778 my ($state, $msg) = $_->Run( %args );
779 die "Couldn't run plugin: $msg" unless $state;
784 { my $mark = 1; # XXX: integer overflows?
788 foreach (@{ $self->{'dump_plugins'} }) {
789 my ($state, $msg) = $_->PushMark( Mark => $mark );
790 die "Couldn't push mark: $msg" unless $state;
796 foreach (@{ $self->{'dump_plugins'} }) {
797 my ($state, $msg) = $_->PopMark( @_ );
798 die "Couldn't pop mark: $msg" unless $state;
804 foreach (@{ $self->{'dump_plugins'} }) {
805 my ($state, $msg) = $_->RollbackTo( @_ );
806 die "Couldn't rollback to mark: $msg" unless $state;
817 =head2 Database transactions support
819 Since 0.03_01 RT::Shredder uses database transactions and should be
820 much safer to run on production servers.
824 Mainstream RT doesn't use FKs, but at least I posted DDL script that creates them
825 in mysql DB, note that if you use FKs then this two valid keys don't allow delete
826 Tickets because of bug in MySQL:
828 ALTER TABLE Tickets ADD FOREIGN KEY (EffectiveId) REFERENCES Tickets(id);
829 ALTER TABLE CachedGroupMembers ADD FOREIGN KEY (Via) REFERENCES CachedGroupMembers(id);
831 L<http://bugs.mysql.com/bug.php?id=4042>
833 =head1 BUGS AND HOW TO CONTRIBUTE
835 We need your feedback in all cases: if you use it or not,
836 is it works for you or not.
840 Don't skip C<make test> step while install and send me reports if it's fails.
841 Add your own tests, it's easy enough if you've writen at list one perl script
842 that works with RT. Read more about testing in F<t/utils.pl>.
846 Send reports to L</AUTHOR> or to the RT mailing lists.
850 Many bugs in the docs: insanity, spelling, gramar and so on.
851 Patches are wellcome.
855 Please, see Todo file, it has some technical notes
856 about what I plan to do, when I'll do it, also it
857 describes some problems code has.
861 Since RT-3.7 shredder is a part of the RT distribution.
862 Versions of the RTx::Shredder extension could
863 be downloaded from the CPAN. Those work with older
864 RT versions or you can find repository at
865 L<https://opensvn.csie.org/rtx_shredder>
869 Ruslan U. Zakirov <Ruslan.Zakirov@gmail.com>
873 This program is free software; you can redistribute
874 it and/or modify it under the same terms as Perl itself.
876 The full text of the license can be found in the
881 L<rt-shredder>, L<rt-validator>