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1 | package PVE::PBSClient; | |
2 | # utility functions for interaction with Proxmox Backup client CLI executable | |
3 | ||
4 | use strict; | |
5 | use warnings; | |
6 | ||
7 | use Fcntl qw(F_GETFD F_SETFD FD_CLOEXEC); | |
8 | use IO::File; | |
9 | use JSON; | |
10 | use POSIX qw(strftime ENOENT); | |
11 | ||
12 | use PVE::JSONSchema qw(get_standard_option); | |
13 | use PVE::Tools qw(run_command file_set_contents file_get_contents file_read_firstline $IPV6RE); | |
14 | ||
15 | # returns a repository string suitable for proxmox-backup-client, pbs-restore, etc. | |
16 | # $scfg must have the following structure: | |
17 | # { | |
18 | # datastore | |
19 | # server | |
20 | # port (optional defaults to 8007) | |
21 | # username (optional defaults to 'root@pam') | |
22 | # } | |
23 | sub get_repository { | |
24 | my ($scfg) = @_; | |
25 | ||
26 | my $server = $scfg->{server}; | |
27 | die "no server given\n" if !defined($server); | |
28 | ||
29 | $server = "[$server]" if $server =~ /^$IPV6RE$/; | |
30 | ||
31 | if (my $port = $scfg->{port}) { | |
32 | $server .= ":$port" if $port != 8007; | |
33 | } | |
34 | ||
35 | my $datastore = $scfg->{datastore}; | |
36 | die "no datastore given\n" if !defined($datastore); | |
37 | ||
38 | my $username = $scfg->{username} // 'root@pam'; | |
39 | ||
40 | return "$username\@$server:$datastore"; | |
41 | } | |
42 | ||
43 | sub new { | |
44 | my ($class, $scfg, $storeid, $sdir) = @_; | |
45 | ||
46 | die "no section config provided\n" if ref($scfg) eq ''; | |
47 | die "undefined store id\n" if !defined($storeid); | |
48 | ||
49 | my $secret_dir = $sdir // '/etc/pve/priv/storage'; | |
50 | ||
51 | my $self = bless { | |
52 | scfg => $scfg, | |
53 | storeid => $storeid, | |
54 | secret_dir => $secret_dir | |
55 | }, $class; | |
56 | return $self; | |
57 | } | |
58 | ||
59 | my sub password_file_name { | |
60 | my ($self) = @_; | |
61 | ||
62 | return "$self->{secret_dir}/$self->{storeid}.pw"; | |
63 | } | |
64 | ||
65 | sub set_password { | |
66 | my ($self, $password) = @_; | |
67 | ||
68 | my $pwfile = password_file_name($self); | |
69 | mkdir $self->{secret_dir}; | |
70 | ||
71 | PVE::Tools::file_set_contents($pwfile, "$password\n", 0600); | |
72 | }; | |
73 | ||
74 | sub delete_password { | |
75 | my ($self) = @_; | |
76 | ||
77 | my $pwfile = password_file_name($self); | |
78 | ||
79 | unlink $pwfile or die "deleting password file failed - $!\n"; | |
80 | }; | |
81 | ||
82 | sub get_password { | |
83 | my ($self) = @_; | |
84 | ||
85 | my $pwfile = password_file_name($self); | |
86 | ||
87 | return PVE::Tools::file_read_firstline($pwfile); | |
88 | } | |
89 | ||
90 | sub encryption_key_file_name { | |
91 | my ($self) = @_; | |
92 | ||
93 | return "$self->{secret_dir}/$self->{storeid}.enc"; | |
94 | }; | |
95 | ||
96 | sub set_encryption_key { | |
97 | my ($self, $key) = @_; | |
98 | ||
99 | my $encfile = $self->encryption_key_file_name(); | |
100 | mkdir $self->{secret_dir}; | |
101 | ||
102 | PVE::Tools::file_set_contents($encfile, "$key\n", 0600); | |
103 | }; | |
104 | ||
105 | sub delete_encryption_key { | |
106 | my ($self) = @_; | |
107 | ||
108 | my $encfile = $self->encryption_key_file_name(); | |
109 | ||
110 | if (!unlink $encfile) { | |
111 | return if $! == ENOENT; | |
112 | die "failed to delete encryption key! $!\n"; | |
113 | } | |
114 | }; | |
115 | ||
116 | # Returns a file handle if there is an encryption key, or `undef` if there is not. Dies on error. | |
117 | my sub open_encryption_key { | |
118 | my ($self) = @_; | |
119 | ||
120 | my $encryption_key_file = $self->encryption_key_file_name(); | |
121 | ||
122 | my $keyfd; | |
123 | if (!open($keyfd, '<', $encryption_key_file)) { | |
124 | return undef if $! == ENOENT; | |
125 | die "failed to open encryption key: $encryption_key_file: $!\n"; | |
126 | } | |
127 | ||
128 | return $keyfd; | |
129 | } | |
130 | ||
131 | my $USE_CRYPT_PARAMS = { | |
132 | backup => 1, | |
133 | restore => 1, | |
134 | 'upload-log' => 1, | |
135 | }; | |
136 | ||
137 | my sub do_raw_client_cmd { | |
138 | my ($self, $client_cmd, $param, %opts) = @_; | |
139 | ||
140 | my $use_crypto = $USE_CRYPT_PARAMS->{$client_cmd}; | |
141 | ||
142 | my $client_exe = '/usr/bin/proxmox-backup-client'; | |
143 | die "executable not found '$client_exe'! Proxmox backup client not installed?\n" | |
144 | if ! -x $client_exe; | |
145 | ||
146 | my $scfg = $self->{scfg}; | |
147 | my $repo = get_repository($scfg); | |
148 | ||
149 | my $userns_cmd = delete $opts{userns_cmd}; | |
150 | ||
151 | my $cmd = []; | |
152 | ||
153 | push @$cmd, @$userns_cmd if defined($userns_cmd); | |
154 | ||
155 | push @$cmd, $client_exe, $client_cmd; | |
156 | ||
157 | # This must live in the top scope to not get closed before the `run_command` | |
158 | my $keyfd; | |
159 | if ($use_crypto) { | |
160 | if (defined($keyfd = open_encryption_key($self))) { | |
161 | my $flags = fcntl($keyfd, F_GETFD, 0) | |
162 | // die "failed to get file descriptor flags: $!\n"; | |
163 | fcntl($keyfd, F_SETFD, $flags & ~FD_CLOEXEC) | |
164 | or die "failed to remove FD_CLOEXEC from encryption key file descriptor\n"; | |
165 | push @$cmd, '--crypt-mode=encrypt', '--keyfd='.fileno($keyfd); | |
166 | } else { | |
167 | push @$cmd, '--crypt-mode=none'; | |
168 | } | |
169 | } | |
170 | ||
171 | push @$cmd, @$param if defined($param); | |
172 | ||
173 | push @$cmd, "--repository", $repo; | |
174 | ||
175 | local $ENV{PBS_PASSWORD} = $self->get_password(); | |
176 | ||
177 | local $ENV{PBS_FINGERPRINT} = $scfg->{fingerprint}; | |
178 | ||
179 | # no ascii-art on task logs | |
180 | local $ENV{PROXMOX_OUTPUT_NO_BORDER} = 1; | |
181 | local $ENV{PROXMOX_OUTPUT_NO_HEADER} = 1; | |
182 | ||
183 | if (my $logfunc = $opts{logfunc}) { | |
184 | $logfunc->("run: " . join(' ', @$cmd)); | |
185 | } | |
186 | ||
187 | run_command($cmd, %opts); | |
188 | } | |
189 | ||
190 | my sub run_raw_client_cmd { | |
191 | my ($self, $client_cmd, $param, %opts) = @_; | |
192 | return do_raw_client_cmd($self, $client_cmd, $param, %opts); | |
193 | } | |
194 | ||
195 | my sub run_client_cmd { | |
196 | my ($self, $client_cmd, $param, $no_output) = @_; | |
197 | ||
198 | my $json_str = ''; | |
199 | my $outfunc = sub { $json_str .= "$_[0]\n" }; | |
200 | ||
201 | $param = [] if !defined($param); | |
202 | $param = [ $param ] if !ref($param); | |
203 | ||
204 | $param = [@$param, '--output-format=json'] if !$no_output; | |
205 | ||
206 | do_raw_client_cmd( | |
207 | $self, | |
208 | $client_cmd, | |
209 | $param, | |
210 | outfunc => $outfunc, | |
211 | errmsg => 'proxmox-backup-client failed' | |
212 | ); | |
213 | ||
214 | return undef if $no_output; | |
215 | ||
216 | my $res = decode_json($json_str); | |
217 | ||
218 | return $res; | |
219 | } | |
220 | ||
221 | sub autogen_encryption_key { | |
222 | my ($self) = @_; | |
223 | my $encfile = $self->encryption_key_file_name(); | |
224 | run_command( | |
225 | ['proxmox-backup-client', 'key', 'create', '--kdf', 'none', $encfile], | |
226 | errmsg => 'failed to create encryption key' | |
227 | ); | |
228 | return file_get_contents($encfile); | |
229 | }; | |
230 | ||
231 | # lists all snapshots, optionally limited to a specific group | |
232 | sub get_snapshots { | |
233 | my ($self, $group) = @_; | |
234 | ||
235 | my $param = []; | |
236 | push @$param, $group if defined($group); | |
237 | ||
238 | return run_client_cmd($self, "snapshots", $param); | |
239 | }; | |
240 | ||
241 | # create a new PXAR backup of a FS directory tree - doesn't cross FS boundary | |
242 | # by default. | |
243 | sub backup_fs_tree { | |
244 | my ($self, $root, $id, $pxarname, $cmd_opts) = @_; | |
245 | ||
246 | die "backup-id not provided\n" if !defined($id); | |
247 | die "backup root dir not provided\n" if !defined($root); | |
248 | die "archive name not provided\n" if !defined($pxarname); | |
249 | ||
250 | my $param = [ | |
251 | "$pxarname.pxar:$root", | |
252 | '--backup-type', 'host', | |
253 | '--backup-id', $id, | |
254 | ]; | |
255 | ||
256 | $cmd_opts //= {}; | |
257 | ||
258 | return run_raw_client_cmd($self, 'backup', $param, %$cmd_opts); | |
259 | }; | |
260 | ||
261 | sub restore_pxar { | |
262 | my ($self, $snapshot, $pxarname, $target, $cmd_opts) = @_; | |
263 | ||
264 | die "snapshot not provided\n" if !defined($snapshot); | |
265 | die "archive name not provided\n" if !defined($pxarname); | |
266 | die "restore-target not provided\n" if !defined($target); | |
267 | ||
268 | my $param = [ | |
269 | "$snapshot", | |
270 | "$pxarname.pxar", | |
271 | "$target", | |
272 | "--allow-existing-dirs", 0, | |
273 | ]; | |
274 | $cmd_opts //= {}; | |
275 | ||
276 | return run_raw_client_cmd($self, 'restore', $param, %$cmd_opts); | |
277 | }; | |
278 | ||
279 | sub forget_snapshot { | |
280 | my ($self, $snapshot) = @_; | |
281 | ||
282 | die "snapshot not provided\n" if !defined($snapshot); | |
283 | ||
284 | return run_raw_client_cmd($self, 'forget', ["$snapshot"]); | |
285 | }; | |
286 | ||
287 | sub prune_group { | |
288 | my ($self, $opts, $prune_opts, $group) = @_; | |
289 | ||
290 | die "group not provided\n" if !defined($group); | |
291 | ||
292 | # do nothing if no keep options specified for remote | |
293 | return [] if scalar(keys %$prune_opts) == 0; | |
294 | ||
295 | my $param = []; | |
296 | ||
297 | push @$param, "--quiet"; | |
298 | ||
299 | if (defined($opts->{'dry-run'}) && $opts->{'dry-run'}) { | |
300 | push @$param, "--dry-run", $opts->{'dry-run'}; | |
301 | } | |
302 | ||
303 | foreach my $keep_opt (keys %$prune_opts) { | |
304 | push @$param, "--$keep_opt", $prune_opts->{$keep_opt}; | |
305 | } | |
306 | push @$param, "$group"; | |
307 | ||
308 | return run_client_cmd($self, 'prune', $param); | |
309 | }; | |
310 | ||
311 | sub status { | |
312 | my ($self) = @_; | |
313 | ||
314 | my $total = 0; | |
315 | my $free = 0; | |
316 | my $used = 0; | |
317 | my $active = 0; | |
318 | ||
319 | eval { | |
320 | my $res = run_client_cmd($self, "status"); | |
321 | ||
322 | $active = 1; | |
323 | $total = $res->{total}; | |
324 | $used = $res->{used}; | |
325 | $free = $res->{avail}; | |
326 | }; | |
327 | if (my $err = $@) { | |
328 | warn $err; | |
329 | } | |
330 | ||
331 | return ($total, $free, $used, $active); | |
332 | }; | |
333 | ||
334 | 1; |