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Commit | Line | Data |
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ffda963f FG |
1 | package PVE::QemuConfig; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
b2c9558d FG |
6 | use PVE::AbstractConfig; |
7 | use PVE::INotify; | |
8 | use PVE::QemuServer; | |
9 | use PVE::Storage; | |
10 | use PVE::Tools; | |
11 | ||
ffda963f FG |
12 | use base qw(PVE::AbstractConfig); |
13 | ||
14 | my $nodename = PVE::INotify::nodename(); | |
15 | ||
16 | mkdir "/etc/pve/nodes/$nodename"; | |
17 | my $confdir = "/etc/pve/nodes/$nodename/qemu-server"; | |
18 | mkdir $confdir; | |
19 | ||
20 | my $lock_dir = "/var/lock/qemu-server"; | |
21 | mkdir $lock_dir; | |
22 | ||
c9db2240 | 23 | my $MAX_UNUSED_DISKS = 256; |
ffda963f FG |
24 | |
25 | # BEGIN implemented abstract methods from PVE::AbstractConfig | |
26 | ||
27 | sub guest_type { | |
28 | return "VM"; | |
29 | } | |
30 | ||
31 | sub __config_max_unused_disks { | |
3aa44d3b | 32 | my ($class) = @_; |
ffda963f FG |
33 | |
34 | return $MAX_UNUSED_DISKS; | |
35 | } | |
36 | ||
37 | sub config_file_lock { | |
38 | my ($class, $vmid) = @_; | |
39 | ||
40 | return "$lock_dir/lock-$vmid.conf"; | |
41 | } | |
42 | ||
43 | sub cfs_config_path { | |
44 | my ($class, $vmid, $node) = @_; | |
45 | ||
46 | $node = $nodename if !$node; | |
47 | return "nodes/$node/qemu-server/$vmid.conf"; | |
48 | } | |
49 | ||
b2c9558d FG |
50 | sub has_feature { |
51 | my ($class, $feature, $conf, $storecfg, $snapname, $running, $backup_only) = @_; | |
52 | ||
53 | my $err; | |
54 | PVE::QemuServer::foreach_drive($conf, sub { | |
55 | my ($ds, $drive) = @_; | |
56 | ||
57 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
5282865b | 58 | return if $backup_only && defined($drive->{backup}) && !$drive->{backup}; |
b2c9558d FG |
59 | my $volid = $drive->{file}; |
60 | $err = 1 if !PVE::Storage::volume_has_feature($storecfg, $feature, $volid, $snapname, $running); | |
61 | }); | |
62 | ||
63 | return $err ? 0 : 1; | |
64 | } | |
65 | ||
3aa44d3b | 66 | sub get_replicatable_volumes { |
c78f43b9 | 67 | my ($class, $storecfg, $vmid, $conf, $cleanup, $noerr) = @_; |
3aa44d3b DM |
68 | |
69 | my $volhash = {}; | |
70 | ||
71 | my $test_volid = sub { | |
f949eb77 | 72 | my ($volid, $attr) = @_; |
3aa44d3b | 73 | |
a6cb40f7 DM |
74 | return if $attr->{cdrom}; |
75 | ||
76 | return if !$cleanup && !$attr->{replicate}; | |
77 | ||
4ab3bcc8 DM |
78 | if ($volid =~ m|^/|) { |
79 | return if !$attr->{replicate}; | |
a6cb40f7 | 80 | return if $cleanup || $noerr; |
4ab3bcc8 DM |
81 | die "unable to replicate local file/device '$volid'\n"; |
82 | } | |
83 | ||
a722d4ff DM |
84 | my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid, $noerr); |
85 | return if !$storeid; | |
86 | ||
6f249d94 | 87 | my $scfg = PVE::Storage::storage_config($storecfg, $storeid); |
a722d4ff DM |
88 | return if $scfg->{shared}; |
89 | ||
f7e7767f DM |
90 | my ($path, $owner, $vtype) = PVE::Storage::path($storecfg, $volid); |
91 | return if !$owner || ($owner != $vmid); | |
92 | ||
a6cb40f7 DM |
93 | if ($vtype ne 'images') { |
94 | return if $cleanup || $noerr; | |
95 | die "unable to replicate volume '$volid', type '$vtype'\n"; | |
96 | } | |
3aa44d3b DM |
97 | |
98 | if (!PVE::Storage::volume_has_feature($storecfg, 'replicate', $volid)) { | |
e5857ca8 | 99 | return if $cleanup || $noerr; |
3aa44d3b DM |
100 | die "missing replicate feature on volume '$volid'\n"; |
101 | } | |
102 | ||
103 | $volhash->{$volid} = 1; | |
104 | }; | |
105 | ||
f949eb77 | 106 | PVE::QemuServer::foreach_volid($conf, $test_volid); |
3aa44d3b | 107 | |
8299257e DM |
108 | # add 'unusedX' volumes to volhash |
109 | foreach my $key (keys %$conf) { | |
110 | if ($key =~ m/^unused/) { | |
111 | $test_volid->($conf->{$key}, { replicate => 1 }); | |
112 | } | |
113 | } | |
114 | ||
3aa44d3b DM |
115 | return $volhash; |
116 | } | |
117 | ||
b2c9558d | 118 | sub __snapshot_save_vmstate { |
48b4cdc2 | 119 | my ($class, $vmid, $conf, $snapname, $storecfg, $statestorage, $suspend) = @_; |
b2c9558d | 120 | |
2eeb0c93 | 121 | # first, use explicitly configured storage |
48b4cdc2 DC |
122 | # either directly via API, or via conf |
123 | my $target = $statestorage // $conf->{vmstatestorage}; | |
b2c9558d FG |
124 | |
125 | if (!$target) { | |
2eeb0c93 | 126 | my ($shared, $local); |
65a5ce88 | 127 | PVE::QemuServer::foreach_storage_used_by_vm($conf, sub { |
b2c9558d FG |
128 | my ($sid) = @_; |
129 | my $scfg = PVE::Storage::storage_config($storecfg, $sid); | |
2eeb0c93 FG |
130 | my $dst = $scfg->{shared} ? \$shared : \$local; |
131 | $$dst = $sid if !$$dst || $scfg->{path}; # prefer file based storage | |
b2c9558d | 132 | }); |
b2c9558d | 133 | |
2eeb0c93 FG |
134 | # second, use shared storage where VM has at least one disk |
135 | # third, use local storage where VM has at least one disk | |
136 | # fall back to local storage | |
137 | $target = $shared // $local // 'local'; | |
138 | } | |
b2c9558d | 139 | |
566caaa4 | 140 | my $driver_state_size = 500; # assume 500MB is enough to safe all driver state; |
b3983fa1 DC |
141 | # our savevm-start does live-save of the memory until the space left in the |
142 | # volume is just enough for the remaining memory content + internal state | |
143 | # then it stops the vm and copies the rest so we reserve twice the | |
144 | # memory content + state to minimize vm downtime | |
b2c9558d | 145 | my $size = $conf->{memory}*2 + $driver_state_size; |
159719e5 | 146 | my $scfg = PVE::Storage::storage_config($storecfg, $target); |
b2c9558d FG |
147 | |
148 | my $name = "vm-$vmid-state-$snapname"; | |
b2c9558d | 149 | $name .= ".raw" if $scfg->{path}; # add filename extension for file base storage |
159719e5 DC |
150 | |
151 | my $statefile = PVE::Storage::vdisk_alloc($storecfg, $target, $vmid, 'raw', $name, $size*1024); | |
152 | my $runningmachine = PVE::QemuServer::get_current_qemu_machine($vmid); | |
153 | ||
154 | if ($suspend) { | |
155 | $conf->{vmstate} = $statefile; | |
156 | $conf->{runningmachine} = $runningmachine; | |
157 | } else { | |
158 | my $snap = $conf->{snapshots}->{$snapname}; | |
159 | $snap->{vmstate} = $statefile; | |
160 | $snap->{runningmachine} = $runningmachine; | |
161 | } | |
162 | ||
163 | return $statefile; | |
b2c9558d FG |
164 | } |
165 | ||
166 | sub __snapshot_check_running { | |
167 | my ($class, $vmid) = @_; | |
168 | return PVE::QemuServer::check_running($vmid); | |
169 | } | |
170 | ||
171 | sub __snapshot_check_freeze_needed { | |
172 | my ($class, $vmid, $config, $save_vmstate) = @_; | |
173 | ||
174 | my $running = $class->__snapshot_check_running($vmid); | |
278e2c9d | 175 | if (!$save_vmstate) { |
9d66b397 | 176 | return ($running, $running && PVE::QemuServer::parse_guest_agent($config)->{enabled} && PVE::QemuServer::qga_check_running($vmid)); |
b2c9558d FG |
177 | } else { |
178 | return ($running, 0); | |
179 | } | |
180 | } | |
181 | ||
182 | sub __snapshot_freeze { | |
183 | my ($class, $vmid, $unfreeze) = @_; | |
184 | ||
185 | if ($unfreeze) { | |
186 | eval { PVE::QemuServer::vm_mon_cmd($vmid, "guest-fsfreeze-thaw"); }; | |
187 | warn "guest-fsfreeze-thaw problems - $@" if $@; | |
188 | } else { | |
189 | eval { PVE::QemuServer::vm_mon_cmd($vmid, "guest-fsfreeze-freeze"); }; | |
190 | warn "guest-fsfreeze-freeze problems - $@" if $@; | |
191 | } | |
192 | } | |
193 | ||
194 | sub __snapshot_create_vol_snapshots_hook { | |
195 | my ($class, $vmid, $snap, $running, $hook) = @_; | |
196 | ||
197 | if ($running) { | |
3a8deb55 AD |
198 | my $storecfg = PVE::Storage::config(); |
199 | ||
b2c9558d FG |
200 | if ($hook eq "before") { |
201 | if ($snap->{vmstate}) { | |
b2c9558d | 202 | my $path = PVE::Storage::path($storecfg, $snap->{vmstate}); |
3a8deb55 AD |
203 | PVE::Storage::activate_volumes($storecfg, [$snap->{vmstate}]); |
204 | ||
b2c9558d FG |
205 | PVE::QemuServer::vm_mon_cmd($vmid, "savevm-start", statefile => $path); |
206 | for(;;) { | |
207 | my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-savevm"); | |
208 | if (!$stat->{status}) { | |
209 | die "savevm not active\n"; | |
210 | } elsif ($stat->{status} eq 'active') { | |
211 | sleep(1); | |
212 | next; | |
213 | } elsif ($stat->{status} eq 'completed') { | |
214 | last; | |
215 | } else { | |
216 | die "query-savevm returned status '$stat->{status}'\n"; | |
217 | } | |
218 | } | |
219 | } else { | |
220 | PVE::QemuServer::vm_mon_cmd($vmid, "savevm-start"); | |
221 | } | |
222 | } elsif ($hook eq "after") { | |
3a8deb55 AD |
223 | eval { |
224 | PVE::QemuServer::vm_mon_cmd($vmid, "savevm-end"); | |
225 | PVE::Storage::deactivate_volumes($storecfg, [$snap->{vmstate}]) if $snap->{vmstate}; | |
226 | }; | |
b2c9558d FG |
227 | warn $@ if $@; |
228 | } elsif ($hook eq "after-freeze") { | |
229 | # savevm-end is async, we need to wait | |
230 | for (;;) { | |
231 | my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-savevm"); | |
232 | if (!$stat->{bytes}) { | |
233 | last; | |
234 | } else { | |
235 | print "savevm not yet finished\n"; | |
236 | sleep(1); | |
237 | next; | |
238 | } | |
239 | } | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
244 | sub __snapshot_create_vol_snapshot { | |
245 | my ($class, $vmid, $ds, $drive, $snapname) = @_; | |
246 | ||
247 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
248 | ||
249 | my $volid = $drive->{file}; | |
250 | my $device = "drive-$ds"; | |
251 | my $storecfg = PVE::Storage::config(); | |
252 | ||
253 | PVE::QemuServer::qemu_volume_snapshot($vmid, $device, $storecfg, $volid, $snapname); | |
254 | } | |
255 | ||
256 | sub __snapshot_delete_remove_drive { | |
257 | my ($class, $snap, $remove_drive) = @_; | |
258 | ||
259 | if ($remove_drive eq 'vmstate') { | |
260 | delete $snap->{$remove_drive}; | |
261 | } else { | |
262 | my $drive = PVE::QemuServer::parse_drive($remove_drive, $snap->{$remove_drive}); | |
263 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
264 | ||
265 | my $volid = $drive->{file}; | |
266 | delete $snap->{$remove_drive}; | |
267 | $class->add_unused_volume($snap, $volid); | |
268 | } | |
269 | } | |
270 | ||
271 | sub __snapshot_delete_vmstate_file { | |
272 | my ($class, $snap, $force) = @_; | |
273 | ||
274 | my $storecfg = PVE::Storage::config(); | |
275 | ||
276 | eval { PVE::Storage::vdisk_free($storecfg, $snap->{vmstate}); }; | |
277 | if (my $err = $@) { | |
278 | die $err if !$force; | |
279 | warn $err; | |
280 | } | |
281 | } | |
282 | ||
283 | sub __snapshot_delete_vol_snapshot { | |
284 | my ($class, $vmid, $ds, $drive, $snapname, $unused) = @_; | |
285 | ||
286 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
287 | my $storecfg = PVE::Storage::config(); | |
288 | my $volid = $drive->{file}; | |
289 | my $device = "drive-$ds"; | |
290 | ||
291 | PVE::QemuServer::qemu_volume_snapshot_delete($vmid, $device, $storecfg, $volid, $snapname); | |
292 | ||
293 | push @$unused, $volid; | |
294 | } | |
295 | ||
58b1a8d7 DC |
296 | sub __snapshot_rollback_hook { |
297 | my ($class, $vmid, $conf, $snap, $prepare, $data) = @_; | |
298 | ||
299 | if ($prepare) { | |
300 | # we save the machine of the current config | |
301 | $data->{oldmachine} = $conf->{machine}; | |
302 | } else { | |
e6d35c71 TL |
303 | # if we have a 'runningmachine' entry in the snapshot we use that |
304 | # for the forcemachine parameter, else we use the old logic | |
c6737ef1 DC |
305 | if (defined($conf->{runningmachine})) { |
306 | $data->{forcemachine} = $conf->{runningmachine}; | |
307 | delete $conf->{runningmachine}; | |
308 | } else { | |
309 | # Note: old code did not store 'machine', so we try to be smart | |
310 | # and guess the snapshot was generated with kvm 1.4 (pc-i440fx-1.4). | |
311 | $data->{forcemachine} = $conf->{machine} || 'pc-i440fx-1.4'; | |
312 | ||
313 | # we remove the 'machine' configuration if not explicitly specified | |
314 | # in the original config. | |
315 | delete $conf->{machine} if $snap->{vmstate} && !defined($data->{oldmachine}); | |
316 | } | |
6ee499ff DC |
317 | |
318 | if ($conf->{vmgenid}) { | |
4f4d9772 TL |
319 | # tell the VM that it's another generation, so it can react |
320 | # appropriately, e.g. dirty-mark copies of distributed databases or | |
321 | # re-initializing its random number generator | |
6ee499ff DC |
322 | $conf->{vmgenid} = PVE::QemuServer::generate_uuid(); |
323 | } | |
58b1a8d7 DC |
324 | } |
325 | ||
326 | return; | |
327 | } | |
328 | ||
b2c9558d FG |
329 | sub __snapshot_rollback_vol_possible { |
330 | my ($class, $drive, $snapname) = @_; | |
331 | ||
332 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
333 | ||
334 | my $storecfg = PVE::Storage::config(); | |
335 | my $volid = $drive->{file}; | |
336 | ||
337 | PVE::Storage::volume_rollback_is_possible($storecfg, $volid, $snapname); | |
338 | } | |
339 | ||
340 | sub __snapshot_rollback_vol_rollback { | |
341 | my ($class, $drive, $snapname) = @_; | |
342 | ||
343 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
344 | ||
345 | my $storecfg = PVE::Storage::config(); | |
346 | PVE::Storage::volume_snapshot_rollback($storecfg, $drive->{file}, $snapname); | |
347 | } | |
348 | ||
349 | sub __snapshot_rollback_vm_stop { | |
350 | my ($class, $vmid) = @_; | |
351 | ||
352 | my $storecfg = PVE::Storage::config(); | |
353 | PVE::QemuServer::vm_stop($storecfg, $vmid, undef, undef, 5, undef, undef); | |
354 | } | |
355 | ||
356 | sub __snapshot_rollback_vm_start { | |
58b1a8d7 | 357 | my ($class, $vmid, $vmstate, $data) = @_; |
b2c9558d FG |
358 | |
359 | my $storecfg = PVE::Storage::config(); | |
360 | my $statefile = PVE::Storage::path($storecfg, $vmstate); | |
58b1a8d7 | 361 | PVE::QemuServer::vm_start($storecfg, $vmid, $statefile, undef, undef, undef, $data->{forcemachine}); |
b2c9558d FG |
362 | } |
363 | ||
c4a54ed5 FG |
364 | sub __snapshot_rollback_get_unused { |
365 | my ($class, $conf, $snap) = @_; | |
366 | ||
367 | my $unused = []; | |
368 | ||
369 | $class->__snapshot_foreach_volume($conf, sub { | |
370 | my ($vs, $volume) = @_; | |
371 | ||
372 | return if PVE::QemuServer::drive_is_cdrom($volume); | |
373 | ||
374 | my $found = 0; | |
375 | my $volid = $volume->{file}; | |
376 | ||
377 | $class->__snapshot_foreach_volume($snap, sub { | |
378 | my ($ds, $drive) = @_; | |
379 | ||
380 | return if $found; | |
381 | return if PVE::QemuServer::drive_is_cdrom($drive); | |
382 | ||
383 | $found = 1 | |
384 | if ($drive->{file} && $drive->{file} eq $volid); | |
385 | }); | |
386 | ||
387 | push @$unused, $volid if !$found; | |
388 | }); | |
389 | ||
390 | return $unused; | |
391 | } | |
392 | ||
b2c9558d FG |
393 | sub __snapshot_foreach_volume { |
394 | my ($class, $conf, $func) = @_; | |
395 | ||
396 | PVE::QemuServer::foreach_drive($conf, $func); | |
397 | } | |
ffda963f FG |
398 | # END implemented abstract methods from PVE::AbstractConfig |
399 | ||
400 | 1; |