Ravada.pm 10.4 KB
Newer Older
1
2
3
4
5
package Ravada;

use warnings;
use strict;

6
use Data::Dumper;
7
use DBIx::Connector;
Francesc Guasch's avatar
Francesc Guasch committed
8
use JSON::XS;
9
10
11
use Moose;
use YAML;

12
use Ravada::Request;
13
use Ravada::VM::KVM;
14
use Ravada::VM::LXC;
15

Francesc Guasch's avatar
Francesc Guasch committed
16
17
18
19
20
21
22
23
24
25
26
27
=head1 NAME

Ravada - Remove Virtual Desktop Manager

=head1 SYNOPSIS

  use Ravada;

  my $ravada = Ravada->new()

=cut

28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

our $FILE_CONFIG = "/etc/ravada.conf";

###########################################################################

our $CONNECTOR;
our $CONFIG = {};
_connect_dbh();


has 'vm' => (
          is => 'ro'
        ,isa => 'ArrayRef'
       ,lazy => 1
     , builder => '_create_vm'
);

has 'connector' => (
46
47
48
49
50
51
        is => 'rw'
);

has 'config' => (
    is => 'ro'
    ,isa => 'Str'
52
53
);

Francesc Guasch's avatar
Francesc Guasch committed
54
55
56
57
58
59
60
=head2 BUILD

Internal constructor

=cut


61
62
sub BUILD {
    my $self = shift;
63
    if ($self->config()) {
64
        _init_config($self->config);
65
    } else {
Francesc Guasch's avatar
Francesc Guasch committed
66
        _init_config($FILE_CONFIG) if -e $FILE_CONFIG;
67
    }
68

Francesc Guasch's avatar
Francesc Guasch committed
69
70
71
72
    if ( $self->connector ) {
        $CONNECTOR = $self->connector 
    } else {
        $CONNECTOR = $self->_connect_dbh();
73
        $self->connector($CONNECTOR);
Francesc Guasch's avatar
Francesc Guasch committed
74
    }
75

76
77
78
79
80
81
}

sub _connect_dbh {
    my $driver= ($CONFIG->{db}->{driver} or 'mysql');;
    my $db_user = ($CONFIG->{db}->{user} or getpwnam($>));;
    my $db_pass = ($CONFIG->{db}->{password} or undef);
Francesc Guasch's avatar
Francesc Guasch committed
82
83
    my $db = ( $CONFIG->{db}->{db} or 'ravada' );
    return DBIx::Connector->new("DBI:$driver:$db"
84
85
86
87
88
89
90
91
92
93
94
                        ,$db_user,$db_pass,{RaiseError => 1
                        , PrintError=> 0 });

}

sub _init_config {
    my $file = shift;
    $CONFIG = YAML::LoadFile($file);
    _connect_dbh();
}

95
sub _create_vm_kvm {
96
    my $self = shift;
97

98
99
100
101
    my $cmd_qemu_img = `which qemu-img`;
    chomp $cmd_qemu_img;

    return(undef,"ERROR: Missing qemu-img") if !$cmd_qemu_img;
102
103

    my $vm_kvm;
104

105
106
    eval { $vm_kvm = Ravada::VM::KVM->new( connector => ( $self->connector or $CONNECTOR )) };
    my $err_kvm = $@;
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125

    my ($internal_vm , $storage);
    eval {
        $internal_vm = $vm_kvm->vm;
        $internal_vm->list_all_domains();

        $storage = $vm_kvm->dir_img();
    };
    $vm_kvm = undef if $@ || !$internal_vm || !$storage;
    return ($vm_kvm,$@);
}

sub _create_vm {
    my $self = shift;

    my @vms = ();

    my ($vm_kvm, $err_kvm) = $self->_create_vm_kvm();

126
127
128
129
130
131
132
133
134
135
136
137
    push @vms,($vm_kvm) if $vm_kvm;

    my $vm_lxc;
    eval { $vm_lxc = Ravada::VM::LXC->new( connector => ( $self->connector or $CONNECTOR )) };
    push @vms,($vm_lxc) if $vm_lxc;
    my $err_lxc = $@;

    if (!@vms) {
        die "No VMs found: $err_lxc\n$err_kvm\n";
    }
    return \@vms;

138
139
}

Francesc Guasch's avatar
Francesc Guasch committed
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
=head2 create_domain

Creates a new domain based on an ISO image or another domain.

  my $domain = $ravada->create_domain( 
         name => $name
    , id_iso => 1
  );


  my $domain = $ravada->create_domain( 
         name => $name
    , id_base => 3
  );


=cut


159
sub create_domain {
160
161
    my $self = shift;

162
163
164
    return $self->vm->[0]->create_domain(@_);
}

Francesc Guasch's avatar
Francesc Guasch committed
165
166
167
168
169
170
171
172
=head2 remove_domain

Removes a domain

  $ravada->remove_domain($name);

=cut

173
174
175
176
sub remove_domain {
    my $self = shift;
    my $name = shift or confess "Missing domain name";

177
    my $domain = $self->search_domain($name, 1)
178
179
180
181
        or confess "ERROR: I can't find domain $name";
    $domain->remove();
}

Francesc Guasch's avatar
Francesc Guasch committed
182
183
184
185
186
187
=head2 search_domain

  my $domain = $ravada->search_domain($name);

=cut

188
189
190
sub search_domain {
    my $self = shift;
    my $name = shift;
191
    my $import = shift;
192
193
194

    for my $vm (@{$self->vm}) {
        my $domain = $vm->search_domain($name);
195
196
197
198
199
        return if !$domain;
        my $id;
        eval { $id = $domain->id };
        # TODO import the domain in the database with an _insert_db or something
        return $domain if $id || $import;
200
    }
201
    return;
202
}
203

Francesc Guasch's avatar
Francesc Guasch committed
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
=head2 search_domain_by_id

  my $domain = $ravada->search_domain_by_id($id);

=cut

sub search_domain_by_id {
    my $self = shift;
      my $id = shift;

    for my $vm (@{$self->vm}) {
        my $domain = $vm->search_domain_by_id($id);
        return $domain if $domain;
    }
}


221
222
=head2 list_domains

Francesc Guasch's avatar
Francesc Guasch committed
223
List all created domains
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239

  my @list = $ravada->list_domains();

=cut

sub list_domains {
    my $self = shift;
    my @domains;
    for my $vm (@{$self->vm}) {
        for my $domain ($vm->list_domains) {
            push @domains,($domain);
        }
    }
    return @domains;
}

240
241
242
243
244
245
246
247
248
249
250
251
252
=head2 list_domains_data

List all domains in raw format. Return a list of id => { name , id , is_active , is_base }

   my $list = $ravada->list_domains_data();

   $c->render(json => $list);

=cut

sub list_domains_data {
    my $self = shift;
    my @domains;
253
    for my $domain ($self->list_domains()) {
254
255
256
        eval { $domain->id };
        warn $@ if $@;
        next if $@;
257
258
259
260
261
        push @domains, {                id => $domain->id 
                                    , name => $domain->name
                                  ,is_base => $domain->is_base
                                ,is_active => $domain->is_active
                               
262
263
                           }
    }
264
    return \@domains;
265
266
267
}


Francesc Guasch's avatar
Francesc Guasch committed
268
269
270
271
272
273
274
275
276
277
278
279
280
281
=head2 list_bases

List all base domains

  my @list = $ravada->list_domains();


=cut

sub list_bases {
    my $self = shift;
    my @domains;
    for my $vm (@{$self->vm}) {
        for my $domain ($vm->list_domains) {
282
283
284
            eval { $domain->id };
            warn $@ if $@;
            next    if $@;
Francesc Guasch's avatar
Francesc Guasch committed
285
286
287
288
289
290
            push @domains,($domain) if $domain->is_base;
        }
    }
    return @domains;
}

291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
=head2 list_bases_data

List information about the bases

=cut

sub list_bases_data {
    my $self = shift;
    my @data;
    for ($self->list_bases ) {
        push @data,{ id => $_->id , name => $_->name };
    }
    return \@data;
}

Francesc Guasch's avatar
Francesc Guasch committed
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
=head2 list_images

List all ISO images

=cut

sub list_images {
    my $self = shift;
    my @domains;
    my $sth = $CONNECTOR->dbh->prepare(
        "SELECT * FROM iso_images ORDER BY name"
    );
    $sth->execute;
    while (my $row = $sth->fetchrow_hashref) {
        push @domains,($row);
    }
    $sth->finish;
    return @domains;
}

326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
=head2 list_images_data

List information about the images

=cut

sub list_images_data {
    my $self = shift;
    my @data;
    for ($self->list_images ) {
        push @data,{ id => $_->{id} , name => $_->{name} };
    }
    return \@data;
}

Francesc Guasch's avatar
Francesc Guasch committed
341

Francesc Guasch's avatar
Francesc Guasch committed
342
343
344
345
=head2 remove_volume

  $ravada->remove_volume($file);

Francesc Guasch's avatar
Francesc Guasch committed
346

Francesc Guasch's avatar
Francesc Guasch committed
347
348
=cut

349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
sub remove_volume {
    my $self = shift;

    my $file = shift;
    my ($name) = $file =~ m{.*/(.*)};

    my $removed = 0;
    for my $vm (@{$self->vm}) {
        my $vol = $vm->search_volume($name);
        next if !$vol;

        $vol->delete();
        $removed++;
    }
    if (!$removed && -e $file ) {
        warn "volume $file not found. removing file $file.\n";
        unlink $file or die "$! $file";
    }

}
369

Francesc Guasch's avatar
Francesc Guasch committed
370
371
372
373
374
375
376
377
=head2 process_requests

This is run in the ravada backend. It processes the commands requested by the fronted

  $ravada->process_requests();

=cut

378
379
380
381
382
383
sub process_requests {
    my $self = shift;

    my $sth = $CONNECTOR->dbh->prepare("SELECT id FROM requests WHERE status='requested'");
    $sth->execute;
    while (my ($id)= $sth->fetchrow) {
Francesc Guasch's avatar
Francesc Guasch committed
384
385
386
387
        warn "Processing request $id";
        my $req = Ravada::Request->open($id);
        $self->_execute($req);
        warn $req->status();
388
389
390
391
    }
    $sth->finish;
}

Francesc Guasch's avatar
Francesc Guasch committed
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
=head2 list_requests

Returns a list of ruquests : ( id , domain_name, status, error )

=cut

sub list_requests {
    my $self = shift;
    my $sth = $CONNECTOR->dbh->prepare("SELECT id, args, status, error "
        ." FROM requests "
        ." WHERE status <> 'done' "
    );
    $sth->execute;
    my @reqs;
    my ($id, $j_args, $status, $error);
    $sth->bind_columns(\($id, $j_args, $status, $error));

    while ( $sth->fetch) {
        my $args = decode_json($j_args) if $j_args;

        push @reqs,{ id => $id, status => $status, error => $error , name => $args->{name}};
    }
    $sth->finish;
    return \@reqs;
}

418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
=head2 list_vm_types

Returnsa list ofthe types of Virtual Machines available on this system

=cut

sub list_vm_types {
    my $self = shift;
    
    my %type;
    for my $vm (@{$self->vm}) {
            my ($name) = ref($vm) =~ /.*::(.*)/;
            $type{$name}++;
    }
    return sort keys %type;
}

435
436
437
438
sub _execute {
    my $self = shift;
    my $request = shift;

Francesc Guasch's avatar
Francesc Guasch committed
439
440
441
442
443
444
445
446
447
448
449
450
451
    my $sub = $self->_req_method($request->command);

    die "Unknown command ".$request->command
        if !$sub;

    return $sub->($self,$request);

}

sub _cmd_create {
    my $self = shift;
    my $request = shift;

452
453
454
455
    $request->status('creating domain');
    my $domain;
    eval {$domain = $self->create_domain(%{$request->args}) };

Francesc Guasch's avatar
Francesc Guasch committed
456
457
458
459
460
461
462
463
464
465
466
467
468
    $request->status('done');
    $request->error($@);

}

sub _cmd_remove {
    my $self = shift;
    my $request = shift;

    $request->status('working');
    eval { $self->remove_domain($request->args('name')) };
    $request->status('done');
    $request->error($@);
Francesc Guasch's avatar
Francesc Guasch committed
469

470
}
Francesc Guasch's avatar
Francesc Guasch committed
471

Francesc Guasch's avatar
Francesc Guasch committed
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
sub _cmd_start {
    my $self = shift;
    my $request = shift;

    $request->status('working');
    my $name = $request->args('name');
    eval { 
        my $domain = $self->search_domain($name);
        die "Unknown domain '$name'\n" if !$domain;
        $domain->start();
    };
    $request->status('done');
    $request->error($@);

}

Francesc Guasch's avatar
Francesc Guasch committed
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
sub _cmd_prepare_base {
    my $self = shift;
    my $request = shift;

    $request->status('working');
    my $name = $request->args('name');
    eval { 
        my $domain = $self->search_domain($name);
        die "Unknown domain '$name'\n" if !$domain;
        $domain->prepare_base();
    };
    $request->status('done');
    $request->error($@);

}


Francesc Guasch's avatar
Francesc Guasch committed
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
sub _cmd_shutdown {
    my $self = shift;
    my $request = shift;

    $request->status('working');
    my $name = $request->args('name');
    eval { 
        my $domain = $self->search_domain($name);
        die "Unknown domain '$name'\n" if !$domain;
        $domain->shutdown();
    };
    $request->status('done');
    $request->error($@);

}


Francesc Guasch's avatar
Francesc Guasch committed
522
523
524
525
526
sub _req_method {
    my $self = shift;
    my  $cmd = shift;

    my %methods = (
Francesc Guasch's avatar
Francesc Guasch committed
527

Francesc Guasch's avatar
Francesc Guasch committed
528
529
530
          start => \&_cmd_start
        ,create => \&_cmd_create
        ,remove => \&_cmd_remove
Francesc Guasch's avatar
Francesc Guasch committed
531
      ,shutdown => \&_cmd_shutdown
Francesc Guasch's avatar
Francesc Guasch committed
532
  ,prepare_base => \&_cmd_prepare_base
Francesc Guasch's avatar
Francesc Guasch committed
533
534
535
536
    );
    return $methods{$cmd};
}

537
538
539
540
541
542
543
544
545
546
547
548
=head2 search_vm

Searches for a VM of a given type

  my $vm = $ravada->search_vm('kvm');

=cut

sub search_vm {
    my $self = shift;
    my $type = shift;

549
550
    confess "Missing VM type"   if !$type;

551
552
553
554
555
556
    my $class = 'Ravada::VM::'.uc($type);
    for my $vm (@{$self->vm}) {
        return $vm if ref($vm) eq $class;
    }
    return;
}
Francesc Guasch's avatar
Francesc Guasch committed
557

Francesc Guasch's avatar
Francesc Guasch committed
558
559
560
561
562
563
564
565
566
567
=head1 AUTHOR

Francesc Guasch-Ortiz	, frankie@telecos.upc.edu

=head1 SEE ALSO

Sys::Virt

=cut

568
1;