VM.pm 11.2 KB
Newer Older
1
2
3
4
use warnings;
use strict;

package Ravada::VM;
5

6
7
8
9
10
=head1 NAME

Ravada::VM - Virtual Managers library for Ravada

=cut
11

12
use Carp qw( carp croak);
13
use Data::Dumper;
14
use Hash::Util qw(lock_hash);
15
16
17
18
19
20
21
use Socket qw( inet_aton inet_ntoa );
use Moose::Role;
use Net::DNS;
use IO::Socket;
use IO::Interface;
use Net::Domain qw(hostfqdn);

Francesc Guasch's avatar
Francesc Guasch committed
22
23
24
no warnings "experimental::signatures";
use feature qw(signatures);

25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
requires 'connect';

# global DB Connection

our $CONNECTOR = \$Ravada::CONNECTOR;
our $CONFIG = \$Ravada::CONFIG;

our $MIN_MEMORY_MB = 128 * 1024;

# domain
requires 'create_domain';
requires 'search_domain';

requires 'list_domains';

# storage volume
requires 'create_volume';

requires 'connect';
requires 'disconnect';
45
requires 'import_domain';
46

47
requires 'ping';
48
49

requires 'is_active';
50
51

requires 'free_memory';
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
############################################################

has 'host' => (
          isa => 'Str'
         , is => 'ro',
    , default => 'localhost'
);

has 'default_dir_img' => (
      isa => 'String'
     , is => 'ro'
);

has 'readonly' => (
    isa => 'Str'
    , is => 'ro'
    ,default => 0
);
############################################################
#
# Method Modifiers definition
# 
#
around 'create_domain' => \&_around_create_domain;

before 'search_domain' => \&_connect;

before 'create_volume' => \&_connect;

81
around 'import_domain' => \&_around_import_domain;
82
83
84
85
#############################################################
#
# method modifiers
#
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106

=head1 Constructors

=head2 open

Opens a Virtual Machine Manager (VM)

Arguments: id of the VM

=cut

sub open {
    my $proto = shift;
    my $id = shift;

    my $class=ref($proto) || $proto;

    my $self = {};
    bless($self, $class);
    my $row = $self->_do_select_vm_db( id => $id);
    lock_hash(%$row);
Francesc Guasch's avatar
Francesc Guasch committed
107
    confess "ERROR: I can't find VM id=$id" if !$row || !keys %$row;
108
109
110
111
112
113
114
115
116
117

    my $type = $row->{vm_type};
    $type = 'KVM'   if $type eq 'qemu';
    $class .= "::$type";
    bless ($self,$class);

    return $self->new();

}

118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
sub _check_readonly {
    my $self = shift;
    confess "ERROR: You can't create domains in read-only mode "
        if $self->readonly 

}

sub _connect {
    my $self = shift;
    $self->connect();
}

sub _pre_create_domain {
    _check_create_domain(@_);
    _connect(@_);
}

sub _around_create_domain {
    my $orig = shift;
    my $self = shift;
    my %args = @_;

140
    my $id_owner = delete $args{id_owner} or confess "ERROR: Missing id_owner";
141
142
143
144
145
146
    my $owner = Ravada::Auth::SQL->search_by_id($id_owner);

    my $base;
    my $id_base = delete $args{id_base};
    $base = Ravada::Domain->open($id_base)  if $id_base;

147
148
149
150
151
152
153
    confess "ERROR: User ".$owner->name." is not allowed to create machines"
        unless $owner->is_admin
            || $owner->can_create_machine()
            || ($base && $owner->can_clone);

    confess "ERROR: Base ".$base->name." is private"
        if !$owner->is_admin && $base && !$base->is_public();
154

155
    $self->_pre_create_domain(@_);
156

157
    my $domain = $self->$orig(@_);
fv3rdugo's avatar
fv3rdugo committed
158

159
    $domain->add_volume_swap( size => $args{swap})  if $args{swap};
160

161
    if ($id_base) {
162
163
164
        $domain->run_timeout($base->run_timeout)
            if defined $base->run_timeout();
    }
165
    my $user = Ravada::Auth::SQL->search_by_id($id_owner);
166
    $domain->is_volatile(1)     if $user->is_temporary() ||($base && $base->volatile_clones());
Francesc Guasch's avatar
Francesc Guasch committed
167
168
169
170
171
172

    my @start_args = ( user => $owner );
    my $remote_ip = $args{remote_ip};
    push @start_args, (remote_ip => $remote_ip) if $remote_ip;

    $domain->_post_start(@start_args) if $domain->is_active;
Francesc Guasch's avatar
Francesc Guasch committed
173
    eval {
Francesc Guasch's avatar
Francesc Guasch committed
174
           $domain->start(@start_args)      if $domain->is_volatile && ! $domain->is_active;
Francesc Guasch's avatar
Francesc Guasch committed
175
176
    };
    die $@ if $@ && $@ !~ /code: 55,/;
177

Francesc Guasch's avatar
Francesc Guasch committed
178
    $domain->get_info();
179
    $domain->display($owner)    if $domain->is_active;
Francesc Guasch's avatar
Francesc Guasch committed
180

181
182
183
    return $domain;
}

184
185
186
sub _around_import_domain {
    my $orig = shift;
    my $self = shift;
187
    my ($name, $user, $spinoff) = @_;
188

189
    my $domain = $self->$orig($name, $user);
190
191
192

    $domain->_insert_db(name => $name, id_owner => $user->id);

193
194
195
196
    if ($spinoff) {
        warn "Spinning volumes off their backing files ...\n" if $ENV{TERM};
        $domain->spinoff_volumes();
    }
197
    return $domain;
198
199
}

200
201
############################################################
#
202

203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
sub _domain_remove_db {
    my $self = shift;
    my $name = shift;
    my $sth = $$CONNECTOR->dbh->prepare("DELETE FROM domains WHERE name=?");
    $sth->execute($name);
    $sth->finish;
}

=head2 domain_remove

Remove the domain. Returns nothing.

=cut


sub domain_remove {
    my $self = shift;
    $self->domain_remove_vm();
    $self->_domain_remove_bd();
}

=head2 name

Returns the name of this Virtual Machine Manager

    my $name = $vm->name();

=cut

sub name {
    my $self = shift;

235
    return $self->_data('name') if defined $self->{_data}->{name};
236

237
238
    my ($ref) = ref($self) =~ /.*::(.*)/;
    return ($ref or ref($self))."_".$self->host;
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
}

=head2 search_domain_by_id

Returns a domain searching by its id

    $domain = $vm->search_domain_by_id($id);

=cut

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

    my $sth = $$CONNECTOR->dbh->prepare("SELECT name FROM domains "
        ." WHERE id=?");
    $sth->execute($id);
    my ($name) = $sth->fetchrow;
    return if !$name;

    return $self->search_domain($name);
}

Francesc Guasch's avatar
Francesc Guasch committed
262
263
264
265
266
267
268
269
sub _domain_in_db($self, $name) {

    my $sth = $$CONNECTOR->dbh->prepare("SELECT id FROM domains WHERE name=?");
    $sth->execute($name);
    my ($id) =$sth->fetchrow;
    return $id;
}

270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
=head2 ip

Returns the external IP this for this VM

=cut

sub ip {
    my $self = shift;

    my $name = $self->host() or confess "this vm has no host name";
    my $ip = inet_ntoa(inet_aton($name)) ;

    return $ip if $ip && $ip !~ /^127\./;

    $name = Ravada::display_ip();

    if ($name) {
        if ($name =~ /^\d+\.\d+\.\d+\.\d+$/) {
            $ip = $name;
        } else {
            $ip = inet_ntoa(inet_aton($name));
        }
    }
    return $ip if $ip && $ip !~ /^127\./;

    $ip = $self->_interface_ip();
    return $ip if $ip && $ip !~ /^127/ && $ip =~ /^\d+\.\d+\.\d+\.\d+$/;

    warn "WARNING: I can't find the IP of host ".$self->host.", using localhost."
        ." This virtual machine won't be available from the network.";

    return '127.0.0.1';
}

Francesc Guasch's avatar
Francesc Guasch committed
304
305
306
307
308
309
=head2 nat_ip

Returns the IP of the VM when it is in a NAT environment

=cut

310
sub nat_ip($self) {
311
    return Ravada::nat_ip();
312
313
}

314
315
316
317
sub _interface_ip {
    my $s = IO::Socket::INET->new(Proto => 'tcp');

    for my $if ( $s->if_list) {
318
        next if $if =~ /^virbr/;
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
        my $addr = $s->if_addr($if);
        return $addr if $addr && $addr !~ /^127\./;
    }
    return;
}

sub _check_memory {
    my $self = shift;
    my %args = @_;
    return if !exists $args{memory};

    die "ERROR: Low memory '$args{memory}' required ".int($MIN_MEMORY_MB/1024)." MB " if $args{memory} < $MIN_MEMORY_MB;
}

sub _check_disk {
    my $self = shift;
    my %args = @_;
    return if !exists $args{disk};

    die "ERROR: Low Disk '$args{disk}' required 1 Gb " if $args{disk} < 1024*1024;
}


sub _check_create_domain {
    my $self = shift;

    my %args = @_;

    $self->_check_readonly(@_);

    $self->_check_require_base(@_);
    $self->_check_memory(@_);
    $self->_check_disk(@_);

}

sub _check_require_base {
    my $self = shift;

    my %args = @_;
359
360
361
362
363
364

    my $id_base = delete $args{id_base} or return;
    my $request = delete $args{request};
    my $id_owner = delete $args{id_owner}
        or confess "ERROR: id_owner required ";

365
366
367
    delete $args{start};
    delete $args{remote_ip};

368
369
370
371
372
373
    delete @args{'_vm','name','vm', 'memory','description'};

    confess "ERROR: Unknown arguments ".join(",",keys %args)
        if keys %args;

    my $base = Ravada::Domain->open($id_base);
374
    if (my @requests = grep { $_->command ne 'clone' } $base->list_requests) {
375
376
377
378
        confess "ERROR: Domain ".$base->name." has ".$base->list_requests
                            ." requests.\n"
            unless scalar @requests == 1 && $request
                && $requests[0]->id eq $request->id;
379
380
    }

381

382
383
384
    die "ERROR: Domain ".$self->name." is not base"
            if !$base->is_base();

385
386
387
388
    my $user = Ravada::Auth::SQL->search_by_id($id_owner);

    die "ERROR: Base ".$base->name." is not public\n"
        unless $user->is_admin || $base->is_public;
389
390
}

391
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
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
=head2 id

Returns the id value of the domain. This id is used in the database
tables and is not related to the virtual machine engine.

=cut

sub id {
    return $_[0]->_data('id');
}

sub _data {
    my $self = shift;
    my $field = shift or confess "Missing field name";

#    _init_connector();

    return $self->{_data}->{$field} if exists $self->{_data}->{$field};
    $self->{_data} = $self->_select_vm_db( name => $self->name);

    confess "No DB info for VM ".$self->name    if !$self->{_data};
    confess "No field $field in vms"            if !exists$self->{_data}->{$field};

    return $self->{_data}->{$field};
}

sub _do_select_vm_db {
    my $self = shift;
    my %args = @_;

    if (!keys %args) {
        my $id;
        eval { $id = $self->id  };
        if ($id) {
            %args =( id => $id );
        }
    }

    my $sth = $$CONNECTOR->dbh->prepare(
        "SELECT * FROM vms WHERE ".join(",",map { "$_=?" } sort keys %args )
    );
    $sth->execute(map { $args{$_} } sort keys %args);
    my $row = $sth->fetchrow_hashref;
    $sth->finish;
    return $row;
}

sub _select_vm_db {
    my $self = shift;

    my ($row) = ($self->_do_select_vm_db(@_) or $self->_insert_vm_db());

    $self->{_data} = $row;
    return $row if $row->{id};
}

sub _insert_vm_db {
    my $self = shift;
    my $sth = $$CONNECTOR->dbh->prepare(
        "INSERT INTO vms (name,vm_type,hostname) "
        ." VALUES(?,?,?)"
    );
    my $name = $self->name;
    $sth->execute($name,$self->type,$self->host);
    $sth->finish;


    return $self->_do_select_vm_db( name => $name);
}

=head2 default_storage_pool_name

Set the default storage pool name for this Virtual Machine Manager

    $vm->default_storage_pool_name('default');

=cut

sub default_storage_pool_name {
    my $self = shift;
    my $value = shift;

    #TODO check pool exists
    if (defined $value) {
        my $id = $self->id();
        my $sth = $$CONNECTOR->dbh->prepare(
            "UPDATE vms SET default_storage=?"
            ." WHERE id=?"
        );
        $sth->execute($value,$id);
        $self->{_data}->{default_storage} = $value;
    }
    return $self->_data('default_storage');
}

486
487
488
489
490
491
492
493
494
495
496
=head2 min_free_memory

Returns the minimun free memory necessary to start a new virtual machine

=cut

sub min_free_memory {
    my $self = shift;
    return $self->_data('min_free_memory');
}

Francesc Guasch's avatar
Francesc Guasch committed
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
=head2 max_load 

Returns the maximum cpu load that the host can handle.

=cut

sub max_load {
    my $self = shift;
    return $self->_data('max_load');
}

=head2 active_limit

Returns the value of 'active_limit' in the BBDD

=cut

sub active_limit {
    my $self = shift;
    return $self->_data('active_limit');
}
518

Francesc Guasch's avatar
Francesc Guasch committed
519
520
521
522
523
524
525
526
527
528
529
530
531
=head2 list_drivers

Lists the drivers available for this Virtual Machine Manager

Arguments: Optional driver type

Returns a list of strings with the nams of the drivers.

    my @drivers = $vm->list_drivers();
    my @drivers = $vm->list_drivers('image');

=cut

Francesc Guasch's avatar
Francesc Guasch committed
532
533
534
sub list_drivers($self, $name=undef) {
    return Ravada::Domain::drivers(undef,$name,$self->type);
}
535

536
1;