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Commit | Line | Data |
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390802ab DM |
1 | package PVE::Daemon; |
2 | ||
3 | # Abstract class to implement Daemons | |
4 | # | |
5 | # Features: | |
6 | # * lock and write PID file /var/run/$name.pid to make sure onyl | |
7 | # one instance is running. | |
d7950851 | 8 | # * keep lock open during restart |
390802ab | 9 | # * correctly daemonize (redirect STDIN/STDOUT) |
4fc69176 DM |
10 | # * restart by stop/start, exec, or signal HUP |
11 | # * daemon restart on error (option 'restart_on_error') | |
b2132054 | 12 | # * handle worker processes (option 'max_workers') |
d7950851 DM |
13 | # * allow to restart while workers are still runningl |
14 | # (option 'leave_children_open_on_reload') | |
c4ad45cf | 15 | # * run as different user using setuid/setgid |
d7950851 | 16 | |
390802ab DM |
17 | use strict; |
18 | use warnings; | |
c4ad45cf DM |
19 | use English; |
20 | ||
390802ab DM |
21 | use PVE::SafeSyslog; |
22 | use PVE::INotify; | |
23 | ||
24 | use POSIX ":sys_wait_h"; | |
25 | use Fcntl ':flock'; | |
517c1125 DM |
26 | use Socket qw(IPPROTO_TCP TCP_NODELAY SOMAXCONN); |
27 | use IO::Socket::INET; | |
28 | ||
390802ab DM |
29 | use Getopt::Long; |
30 | use Time::HiRes qw (gettimeofday); | |
31 | ||
32 | use base qw(PVE::CLIHandler); | |
33 | ||
390802ab DM |
34 | $ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; |
35 | ||
36 | my $daemon_initialized = 0; # we only allow one instance | |
37 | ||
3206cdf6 DM |
38 | my $close_daemon_lock = sub { |
39 | my ($self) = @_; | |
40 | ||
eead1ad8 DM |
41 | return if !$self->{daemon_lock_fh}; |
42 | ||
3206cdf6 DM |
43 | close $self->{daemon_lock_fh}; |
44 | delete $self->{daemon_lock_fh}; | |
45 | }; | |
46 | ||
c5611195 DM |
47 | my $log_err = sub { |
48 | my ($msg) = @_; | |
49 | chomp $msg; | |
50 | print STDERR "$msg\n"; | |
51 | syslog('err', "%s", $msg); | |
52 | }; | |
53 | ||
eead1ad8 DM |
54 | # call this if you fork() from child |
55 | # Note: we already call this for workers, so it is only required | |
56 | # if you fork inside a simple daemon (max_workers == 0). | |
57 | sub after_fork_cleanup { | |
58 | my ($self) = @_; | |
59 | ||
60 | &$close_daemon_lock($self); | |
61 | ||
62 | PVE::INotify::inotify_close(); | |
63 | ||
64 | for my $sig (qw(CHLD HUP INT TERM QUIT)) { | |
65 | $SIG{$sig} = 'DEFAULT'; # restore default handler | |
66 | # AnyEvent signals only works if $SIG{XX} is | |
67 | # undefined (perl event loop) | |
68 | delete $SIG{$sig}; # so that we can handle events with AnyEvent | |
69 | } | |
70 | } | |
71 | ||
390802ab DM |
72 | my $lockpidfile = sub { |
73 | my ($self) = @_; | |
74 | ||
75 | my $lkfn = $self->{pidfile} . ".lock"; | |
76 | ||
48876459 DM |
77 | my $waittime = 0; |
78 | ||
1a6bc2f3 DM |
79 | if (my $fd = $self->{env_pve_lock_fd}) { |
80 | ||
81 | $self->{daemon_lock_fh} = IO::Handle->new_from_fd($fd, "a"); | |
48876459 | 82 | |
1a6bc2f3 DM |
83 | } else { |
84 | ||
48876459 | 85 | $waittime = 5; |
1a6bc2f3 DM |
86 | $self->{daemon_lock_fh} = IO::File->new(">>$lkfn"); |
87 | } | |
88 | ||
3206cdf6 | 89 | if (!$self->{daemon_lock_fh}) { |
1a6bc2f3 | 90 | die "can't open lock '$lkfn' - $!\n"; |
390802ab DM |
91 | } |
92 | ||
48876459 | 93 | for (my $i = 0; $i < $waittime; $i ++) { |
3206cdf6 DM |
94 | return if flock ($self->{daemon_lock_fh}, LOCK_EX|LOCK_NB); |
95 | sleep(1); | |
96 | } | |
97 | ||
98 | if (!flock ($self->{daemon_lock_fh}, LOCK_EX|LOCK_NB)) { | |
99 | &$close_daemon_lock($self); | |
c5611195 DM |
100 | my $err = $!; |
101 | ||
102 | my ($running, $pid) = $self->running(); | |
103 | if ($running) { | |
104 | die "can't aquire lock '$lkfn' - daemon already started (pid = $pid)\n"; | |
105 | } else { | |
106 | die "can't aquire lock '$lkfn' - $err\n"; | |
107 | } | |
390802ab DM |
108 | } |
109 | }; | |
110 | ||
111 | my $writepidfile = sub { | |
112 | my ($self) = @_; | |
113 | ||
114 | my $pidfile = $self->{pidfile}; | |
115 | ||
c5611195 DM |
116 | die "can't open pid file '$pidfile' - $!\n" if !open (PIDFH, ">$pidfile"); |
117 | ||
390802ab DM |
118 | print PIDFH "$$\n"; |
119 | close (PIDFH); | |
120 | }; | |
121 | ||
122 | my $server_cleanup = sub { | |
123 | my ($self) = @_; | |
124 | ||
125 | unlink $self->{pidfile} . ".lock"; | |
126 | unlink $self->{pidfile}; | |
127 | }; | |
128 | ||
b2132054 DM |
129 | my $finish_workers = sub { |
130 | my ($self) = @_; | |
131 | ||
d7950851 DM |
132 | foreach my $id (qw(workers old_workers)) { |
133 | foreach my $cpid (keys %{$self->{$id}}) { | |
134 | my $waitpid = waitpid($cpid, WNOHANG); | |
135 | if (defined($waitpid) && ($waitpid == $cpid)) { | |
136 | delete ($self->{$id}->{$cpid}); | |
137 | syslog('info', "worker $cpid finished"); | |
138 | } | |
b2132054 DM |
139 | } |
140 | } | |
141 | }; | |
142 | ||
143 | my $start_workers = sub { | |
144 | my ($self) = @_; | |
145 | ||
146 | return if $self->{terminate}; | |
147 | ||
148 | my $count = 0; | |
149 | foreach my $cpid (keys %{$self->{workers}}) { | |
150 | $count++; | |
151 | } | |
152 | ||
153 | my $need = $self->{max_workers} - $count; | |
154 | ||
155 | return if $need <= 0; | |
156 | ||
157 | syslog('info', "starting $need worker(s)"); | |
158 | ||
159 | while ($need > 0) { | |
160 | my $pid = fork; | |
161 | ||
162 | if (!defined ($pid)) { | |
163 | syslog('err', "can't fork worker"); | |
164 | sleep (1); | |
165 | } elsif ($pid) { # parent | |
166 | $self->{workers}->{$pid} = 1; | |
167 | syslog('info', "worker $pid started"); | |
168 | $need--; | |
169 | } else { | |
170 | $0 = "$self->{name} worker"; | |
171 | ||
eead1ad8 | 172 | $self->after_fork_cleanup(); |
b2132054 DM |
173 | |
174 | eval { $self->run(); }; | |
175 | if (my $err = $@) { | |
176 | syslog('err', $err); | |
177 | sleep(5); # avoid fast restarts | |
178 | } | |
179 | ||
180 | syslog('info', "worker exit"); | |
181 | exit (0); | |
182 | } | |
183 | } | |
184 | }; | |
185 | ||
186 | my $terminate_server = sub { | |
9403080a | 187 | my ($self, $allow_open_children) = @_; |
b2132054 DM |
188 | |
189 | $self->{terminate} = 1; # set flag to avoid worker restart | |
190 | ||
191 | if (!$self->{max_workers}) { | |
192 | eval { $self->shutdown(); }; | |
193 | warn $@ if $@; | |
194 | return; | |
195 | } | |
196 | ||
197 | eval { $self->shutdown(); }; | |
198 | warn $@ if $@; | |
199 | ||
f3a33995 | 200 | # we have workers - send TERM signal |
b2132054 DM |
201 | |
202 | foreach my $cpid (keys %{$self->{workers}}) { | |
203 | kill(15, $cpid); # TERM childs | |
204 | } | |
205 | ||
f3a33995 | 206 | # if configured, leave children running on HUP |
9403080a | 207 | return if $allow_open_children && |
d7950851 DM |
208 | $self->{leave_children_open_on_reload}; |
209 | ||
f3a33995 DM |
210 | # else, send TERM to old workers |
211 | foreach my $cpid (keys %{$self->{old_workers}}) { | |
212 | kill(15, $cpid); # TERM childs | |
213 | } | |
214 | ||
b2132054 DM |
215 | # nicely shutdown childs (give them max 10 seconds to shut down) |
216 | my $previous_alarm = alarm(10); | |
217 | eval { | |
218 | local $SIG{ALRM} = sub { die "timeout\n" }; | |
219 | ||
220 | while ((my $pid = waitpid (-1, 0)) > 0) { | |
f3a33995 DM |
221 | foreach my $id (qw(workers old_workers)) { |
222 | if (defined($self->{$id}->{$pid})) { | |
223 | delete($self->{$id}->{$pid}); | |
224 | syslog('info', "worker $pid finished"); | |
225 | } | |
b2132054 DM |
226 | } |
227 | } | |
228 | alarm(0); # avoid race condition | |
229 | }; | |
230 | my $err = $@; | |
231 | ||
232 | alarm ($previous_alarm); | |
233 | ||
234 | if ($err) { | |
235 | syslog('err', "error stopping workers (will kill them now) - $err"); | |
f3a33995 DM |
236 | foreach my $id (qw(workers old_workers)) { |
237 | foreach my $cpid (keys %{$self->{$id}}) { | |
238 | # KILL childs still alive! | |
239 | if (kill (0, $cpid)) { | |
240 | delete($self->{$id}->{$cpid}); | |
241 | syslog("err", "kill worker $cpid"); | |
242 | kill(9, $cpid); | |
243 | # fixme: waitpid? | |
244 | } | |
b2132054 DM |
245 | } |
246 | } | |
247 | } | |
248 | }; | |
249 | ||
390802ab DM |
250 | my $server_run = sub { |
251 | my ($self, $debug) = @_; | |
252 | ||
1a6bc2f3 | 253 | # fixme: handle restart lockfd |
390802ab DM |
254 | &$lockpidfile($self); |
255 | ||
1a6bc2f3 DM |
256 | # remove FD_CLOEXEC bit to reuse on exec |
257 | $self->{daemon_lock_fh}->fcntl(Fcntl::F_SETFD(), 0); | |
258 | ||
259 | $ENV{PVE_DAEMON_LOCK_FD} = $self->{daemon_lock_fh}->fileno; | |
260 | ||
390802ab DM |
261 | # run in background |
262 | my $spid; | |
263 | ||
390802ab DM |
264 | $self->{debug} = 1 if $debug; |
265 | ||
266 | $self->init(); | |
267 | ||
268 | if (!$debug) { | |
269 | open STDIN, '</dev/null' || die "can't read /dev/null"; | |
270 | open STDOUT, '>/dev/null' || die "can't write /dev/null"; | |
271 | } | |
272 | ||
a8ba2293 | 273 | if (!$self->{env_restart_pve_daemon} && !$debug) { |
390802ab DM |
274 | PVE::INotify::inotify_close(); |
275 | $spid = fork(); | |
276 | if (!defined ($spid)) { | |
c5611195 | 277 | die "can't put server into background - fork failed"; |
390802ab DM |
278 | } elsif ($spid) { # parent |
279 | exit (0); | |
280 | } | |
281 | PVE::INotify::inotify_init(); | |
282 | } | |
283 | ||
a8ba2293 | 284 | if ($self->{env_restart_pve_daemon}) { |
390802ab DM |
285 | syslog('info' , "restarting server"); |
286 | } else { | |
c5611195 | 287 | &$writepidfile($self); |
390802ab DM |
288 | syslog('info' , "starting server"); |
289 | } | |
290 | ||
c5611195 DM |
291 | POSIX::setsid(); |
292 | ||
390802ab DM |
293 | open STDERR, '>&STDOUT' || die "can't close STDERR\n"; |
294 | ||
b2132054 DM |
295 | my $old_sig_term = $SIG{TERM}; |
296 | local $SIG{TERM} = sub { | |
297 | local ($@, $!, $?); # do not overwrite error vars | |
298 | syslog('info', "received signal TERM"); | |
9403080a | 299 | &$terminate_server($self, 0); |
b2132054 DM |
300 | &$server_cleanup($self); |
301 | &$old_sig_term(@_) if $old_sig_term; | |
302 | }; | |
390802ab | 303 | |
b2132054 DM |
304 | my $old_sig_quit = $SIG{QUIT}; |
305 | local $SIG{QUIT} = sub { | |
306 | local ($@, $!, $?); # do not overwrite error vars | |
307 | syslog('info', "received signal QUIT"); | |
9403080a | 308 | &$terminate_server($self, 0); |
b2132054 DM |
309 | &$server_cleanup($self); |
310 | &$old_sig_quit(@_) if $old_sig_quit; | |
311 | }; | |
390802ab | 312 | |
b2132054 DM |
313 | my $old_sig_int = $SIG{INT}; |
314 | local $SIG{INT} = sub { | |
315 | local ($@, $!, $?); # do not overwrite error vars | |
316 | syslog('info', "received signal INT"); | |
317 | $SIG{INT} = 'DEFAULT'; # allow to terminate now | |
9403080a | 318 | &$terminate_server($self, 0); |
390802ab | 319 | &$server_cleanup($self); |
b2132054 | 320 | &$old_sig_int(@_) if $old_sig_int; |
390802ab DM |
321 | }; |
322 | ||
b2132054 DM |
323 | $SIG{HUP} = sub { |
324 | local ($@, $!, $?); # do not overwrite error vars | |
325 | syslog('info', "received signal HUP"); | |
93710700 | 326 | $self->{got_hup_signal} = 1; |
b2132054 | 327 | if ($self->{max_workers}) { |
9403080a | 328 | &$terminate_server($self, 1); |
b2132054 | 329 | } elsif ($self->can('hup')) { |
bdb5acce DM |
330 | eval { $self->hup() }; |
331 | warn $@ if $@; | |
b2132054 DM |
332 | } |
333 | }; | |
334 | ||
335 | eval { | |
336 | if ($self->{max_workers}) { | |
337 | my $old_sig_chld = $SIG{CHLD}; | |
338 | local $SIG{CHLD} = sub { | |
339 | local ($@, $!, $?); # do not overwrite error vars | |
340 | &$finish_workers($self); | |
341 | &$old_sig_chld(@_) if $old_sig_chld; | |
342 | }; | |
343 | ||
ce0ae1ed DM |
344 | # catch worker finished during restart phase |
345 | &$finish_workers($self); | |
346 | ||
347 | # now loop forever (until we receive terminate signal) | |
348 | for (;;) { | |
b2132054 DM |
349 | &$start_workers($self); |
350 | sleep(5); | |
351 | &$finish_workers($self); | |
352 | last if $self->{terminate}; | |
353 | } | |
bdb5acce | 354 | |
b2132054 DM |
355 | } else { |
356 | $self->run(); | |
357 | } | |
358 | }; | |
390802ab DM |
359 | my $err = $@; |
360 | ||
361 | if ($err) { | |
362 | syslog ('err', "ERROR: $err"); | |
b2132054 | 363 | |
9403080a | 364 | &$terminate_server($self, 1); |
b2132054 | 365 | |
390802ab DM |
366 | if (my $wait_time = $self->{restart_on_error}) { |
367 | $self->restart_daemon($wait_time); | |
368 | } else { | |
369 | $self->exit_daemon(-1); | |
370 | } | |
371 | } | |
372 | ||
b2132054 DM |
373 | if ($self->{got_hup_signal}) { |
374 | $self->restart_daemon(); | |
375 | } else { | |
376 | $self->exit_daemon(0); | |
377 | } | |
390802ab DM |
378 | }; |
379 | ||
380 | sub new { | |
381 | my ($this, $name, $cmdline, %params) = @_; | |
382 | ||
1ea9e6df | 383 | $name = 'daemon' if !$name; # should not happen |
1a6bc2f3 DM |
384 | |
385 | initlog($name); | |
a8ba2293 | 386 | |
1ea9e6df | 387 | my $self; |
a8ba2293 | 388 | |
1ea9e6df | 389 | eval { |
390802ab | 390 | |
1ea9e6df DM |
391 | my $restart = $ENV{RESTART_PVE_DAEMON}; |
392 | delete $ENV{RESTART_PVE_DAEMON}; | |
390802ab | 393 | |
1ea9e6df DM |
394 | my $lockfd = $ENV{PVE_DAEMON_LOCK_FD}; |
395 | delete $ENV{PVE_DAEMON_LOCK_FD}; | |
390802ab | 396 | |
7db2b940 | 397 | if (defined($lockfd)) { |
6105a115 DM |
398 | die "unable to parse lock fd '$lockfd'\n" |
399 | if $lockfd !~ m/^(\d+)$/; | |
7db2b940 DM |
400 | $lockfd = $1; # untaint |
401 | } | |
402 | ||
1ea9e6df | 403 | die "please run as root\n" if !$restart && ($> != 0); |
390802ab | 404 | |
1ea9e6df DM |
405 | die "can't create more that one PVE::Daemon" if $daemon_initialized; |
406 | $daemon_initialized = 1; | |
390802ab | 407 | |
1ea9e6df | 408 | PVE::INotify::inotify_init(); |
390802ab | 409 | |
1ea9e6df DM |
410 | my $class = ref($this) || $this; |
411 | ||
412 | $self = bless { | |
413 | name => $name, | |
414 | run_dir => '/var/run', | |
415 | env_restart_pve_daemon => $restart, | |
416 | env_pve_lock_fd => $lockfd, | |
417 | workers => {}, | |
d7950851 | 418 | old_workers => {}, |
1ea9e6df DM |
419 | }, $class; |
420 | ||
421 | foreach my $opt (keys %params) { | |
422 | my $value = $params{$opt}; | |
423 | if ($opt eq 'restart_on_error') { | |
424 | $self->{$opt} = $value; | |
425 | } elsif ($opt eq 'stop_wait_time') { | |
426 | $self->{$opt} = $value; | |
427 | } elsif ($opt eq 'run_dir') { | |
428 | $self->{$opt} = $value; | |
429 | } elsif ($opt eq 'max_workers') { | |
430 | $self->{$opt} = $value; | |
d7950851 DM |
431 | } elsif ($opt eq 'leave_children_open_on_reload') { |
432 | $self->{$opt} = $value; | |
c4ad45cf DM |
433 | } elsif ($opt eq 'setgid') { |
434 | $self->{$opt} = $value; | |
435 | } elsif ($opt eq 'setuid') { | |
436 | $self->{$opt} = $value; | |
1ea9e6df DM |
437 | } else { |
438 | die "unknown daemon option '$opt'\n"; | |
439 | } | |
390802ab | 440 | } |
d7950851 | 441 | |
c4ad45cf DM |
442 | if (my $gidstr = $self->{setgid}) { |
443 | my $gid = getgrnam($gidstr) || die "getgrnam failed - $!\n"; | |
444 | POSIX::setgid($gid) || die "setgid $gid failed - $!\n"; | |
445 | $EGID = "$gid $gid"; # this calls setgroups | |
446 | # just to be sure | |
447 | die "detected strange gid\n" if !($GID eq "$gid $gid" && $EGID eq "$gid $gid"); | |
448 | } | |
449 | ||
450 | if (my $uidstr = $self->{setuid}) { | |
451 | my $uid = getpwnam($uidstr) || die "getpwnam failed - $!\n"; | |
452 | POSIX::setuid($uid) || die "setuid $uid failed - $!\n"; | |
453 | # just to be sure | |
454 | die "detected strange uid\n" if !($UID == $uid && $EUID == $uid); | |
455 | } | |
456 | ||
d7950851 DM |
457 | if ($restart && $self->{max_workers}) { |
458 | if (my $wpids = $ENV{PVE_DAEMON_WORKER_PIDS}) { | |
459 | foreach my $pid (split(':', $wpids)) { | |
460 | if ($pid =~ m/^(\d+)$/) { | |
461 | $self->{old_workers}->{$1} = 1; | |
462 | } | |
463 | } | |
464 | } | |
465 | } | |
390802ab | 466 | |
1ea9e6df | 467 | $self->{pidfile} = "$self->{run_dir}/${name}.pid"; |
bdb5acce | 468 | |
1ea9e6df | 469 | $self->{nodename} = PVE::INotify::nodename(); |
bdb5acce | 470 | |
1ea9e6df | 471 | $self->{cmdline} = []; |
bdb5acce | 472 | |
1ea9e6df DM |
473 | foreach my $el (@$cmdline) { |
474 | $el =~ m/^(.*)$/; # untaint | |
475 | push @{$self->{cmdline}}, $1; | |
476 | } | |
bdb5acce | 477 | |
1ea9e6df DM |
478 | $0 = $name; |
479 | }; | |
480 | if (my $err = $@) { | |
481 | &$log_err($err); | |
482 | exit(-1); | |
483 | } | |
bdb5acce | 484 | |
390802ab DM |
485 | return $self; |
486 | } | |
487 | ||
488 | sub exit_daemon { | |
489 | my ($self, $status) = @_; | |
490 | ||
491 | syslog("info", "server stopped"); | |
492 | ||
493 | &$server_cleanup($self); | |
494 | ||
495 | exit($status); | |
496 | } | |
497 | ||
498 | sub restart_daemon { | |
499 | my ($self, $waittime) = @_; | |
500 | ||
501 | syslog('info', "server shutdown (restart)"); | |
502 | ||
503 | $ENV{RESTART_PVE_DAEMON} = 1; | |
504 | ||
d7950851 DM |
505 | if ($self->{max_workers}) { |
506 | my @workers = keys %{$self->{workers}}; | |
507 | push @workers, keys %{$self->{old_workers}}; | |
508 | $ENV{PVE_DAEMON_WORKER_PIDS} = join(':', @workers); | |
509 | } | |
510 | ||
390802ab DM |
511 | sleep($waittime) if $waittime; # avoid high server load due to restarts |
512 | ||
513 | PVE::INotify::inotify_close(); | |
514 | ||
515 | exec (@{$self->{cmdline}}); | |
516 | ||
517 | exit (-1); # never reached? | |
518 | } | |
519 | ||
520 | # please overwrite in subclass | |
521 | # this is called at startup - before forking | |
522 | sub init { | |
523 | my ($self) = @_; | |
524 | ||
525 | } | |
526 | ||
527 | # please overwrite in subclass | |
528 | sub shutdown { | |
529 | my ($self) = @_; | |
530 | ||
531 | syslog('info' , "server closing"); | |
532 | ||
b2132054 DM |
533 | if (!$self->{max_workers}) { |
534 | # wait for children | |
535 | 1 while (waitpid(-1, POSIX::WNOHANG()) > 0); | |
536 | } | |
390802ab DM |
537 | } |
538 | ||
bdb5acce DM |
539 | # please define in subclass |
540 | #sub hup { | |
541 | # my ($self) = @_; | |
542 | # | |
543 | # syslog('info' , "received signal HUP (restart)"); | |
544 | #} | |
390802ab DM |
545 | |
546 | # please overwrite in subclass | |
547 | sub run { | |
548 | my ($self) = @_; | |
549 | ||
550 | for (;;) { # forever | |
551 | syslog('info' , "server is running"); | |
552 | sleep(5); | |
553 | } | |
554 | } | |
555 | ||
556 | sub start { | |
557 | my ($self, $debug) = @_; | |
558 | ||
1a6bc2f3 DM |
559 | eval { &$server_run($self, $debug); }; |
560 | if (my $err = $@) { | |
c5611195 DM |
561 | &$log_err("start failed - $err"); |
562 | exit(-1); | |
1a6bc2f3 | 563 | } |
390802ab DM |
564 | } |
565 | ||
bdb5acce DM |
566 | my $read_pid = sub { |
567 | my ($self) = @_; | |
568 | ||
569 | my $pid_str = PVE::Tools::file_read_firstline($self->{pidfile}); | |
570 | ||
571 | return 0 if !$pid_str; | |
572 | ||
573 | return 0 if $pid_str !~ m/^(\d+)$/; # untaint | |
574 | ||
575 | my $pid = int($1); | |
576 | ||
577 | return $pid; | |
578 | }; | |
579 | ||
390802ab DM |
580 | sub running { |
581 | my ($self) = @_; | |
582 | ||
bdb5acce | 583 | my $pid = &$read_pid($self); |
390802ab DM |
584 | |
585 | if ($pid) { | |
586 | my $res = PVE::ProcFSTools::check_process_running($pid) ? 1 : 0; | |
587 | return wantarray ? ($res, $pid) : $res; | |
588 | } | |
589 | ||
590 | return wantarray ? (0, 0) : 0; | |
591 | } | |
592 | ||
593 | sub stop { | |
594 | my ($self) = @_; | |
595 | ||
bdb5acce DM |
596 | my $pid = &$read_pid($self); |
597 | ||
390802ab DM |
598 | return if !$pid; |
599 | ||
600 | if (PVE::ProcFSTools::check_process_running($pid)) { | |
601 | kill(15, $pid); # send TERM signal | |
602 | # give some time | |
603 | my $wait_time = $self->{stop_wait_time} || 5; | |
604 | my $running = 1; | |
605 | for (my $i = 0; $i < $wait_time; $i++) { | |
606 | $running = PVE::ProcFSTools::check_process_running($pid); | |
607 | last if !$running; | |
608 | sleep (1); | |
609 | } | |
610 | ||
611 | syslog('err', "server still running - send KILL") if $running; | |
612 | ||
613 | # to be sure | |
614 | kill(9, $pid); | |
615 | waitpid($pid, 0); | |
616 | } | |
617 | ||
618 | if (-f $self->{pidfile}) { | |
1a6bc2f3 DM |
619 | eval { |
620 | # try to get the lock | |
621 | &$lockpidfile($self); | |
622 | &$server_cleanup($self); | |
623 | }; | |
624 | if (my $err = $@) { | |
c5611195 | 625 | &$log_err("cleanup failed - $err"); |
1a6bc2f3 | 626 | } |
390802ab DM |
627 | } |
628 | } | |
629 | ||
630 | sub register_start_command { | |
da1a7f58 DM |
631 | my ($self, $description) = @_; |
632 | ||
633 | my $class = ref($self); | |
390802ab DM |
634 | |
635 | $class->register_method({ | |
636 | name => 'start', | |
637 | path => 'start', | |
638 | method => 'POST', | |
639 | description => $description || "Start the daemon.", | |
640 | parameters => { | |
641 | additionalProperties => 0, | |
642 | properties => { | |
643 | debug => { | |
644 | description => "Debug mode - stay in foreground", | |
645 | type => "boolean", | |
646 | optional => 1, | |
647 | default => 0, | |
648 | }, | |
649 | }, | |
650 | }, | |
651 | returns => { type => 'null' }, | |
652 | ||
653 | code => sub { | |
654 | my ($param) = @_; | |
655 | ||
656 | $self->start($param->{debug}); | |
657 | ||
658 | return undef; | |
659 | }}); | |
660 | } | |
661 | ||
bdb5acce DM |
662 | my $reload_daemon = sub { |
663 | my ($self, $use_hup) = @_; | |
664 | ||
a8ba2293 | 665 | if ($self->{env_restart_pve_daemon}) { |
bdb5acce DM |
666 | $self->start(); |
667 | } else { | |
668 | my ($running, $pid) = $self->running(); | |
669 | if (!$running) { | |
670 | $self->start(); | |
671 | } else { | |
672 | if ($use_hup) { | |
b2132054 DM |
673 | syslog('info', "send HUP to $pid"); |
674 | kill 1, $pid; | |
bdb5acce DM |
675 | } else { |
676 | $self->stop(); | |
677 | $self->start(); | |
678 | } | |
679 | } | |
680 | } | |
681 | }; | |
682 | ||
390802ab | 683 | sub register_restart_command { |
da1a7f58 DM |
684 | my ($self, $use_hup, $description) = @_; |
685 | ||
686 | my $class = ref($self); | |
390802ab DM |
687 | |
688 | $class->register_method({ | |
689 | name => 'restart', | |
690 | path => 'restart', | |
691 | method => 'POST', | |
692 | description => $description || "Restart the daemon (or start if not running).", | |
693 | parameters => { | |
694 | additionalProperties => 0, | |
695 | properties => {}, | |
696 | }, | |
697 | returns => { type => 'null' }, | |
698 | ||
699 | code => sub { | |
700 | my ($param) = @_; | |
701 | ||
bdb5acce DM |
702 | &$reload_daemon($self, $use_hup); |
703 | ||
704 | return undef; | |
705 | }}); | |
706 | } | |
707 | ||
708 | sub register_reload_command { | |
da1a7f58 DM |
709 | my ($self, $description) = @_; |
710 | ||
711 | my $class = ref($self); | |
bdb5acce DM |
712 | |
713 | $class->register_method({ | |
714 | name => 'reload', | |
715 | path => 'reload', | |
716 | method => 'POST', | |
717 | description => $description || "Reload daemon configuration (or start if not running).", | |
718 | parameters => { | |
719 | additionalProperties => 0, | |
720 | properties => {}, | |
721 | }, | |
722 | returns => { type => 'null' }, | |
723 | ||
724 | code => sub { | |
725 | my ($param) = @_; | |
726 | ||
727 | &$reload_daemon($self, 1); | |
390802ab DM |
728 | |
729 | return undef; | |
730 | }}); | |
731 | } | |
732 | ||
733 | sub register_stop_command { | |
da1a7f58 DM |
734 | my ($self, $description) = @_; |
735 | ||
736 | my $class = ref($self); | |
390802ab DM |
737 | |
738 | $class->register_method({ | |
739 | name => 'stop', | |
740 | path => 'stop', | |
741 | method => 'POST', | |
742 | description => $description || "Stop the daemon.", | |
743 | parameters => { | |
744 | additionalProperties => 0, | |
745 | properties => {}, | |
746 | }, | |
747 | returns => { type => 'null' }, | |
748 | ||
749 | code => sub { | |
750 | my ($param) = @_; | |
751 | ||
752 | $self->stop(); | |
753 | ||
754 | return undef; | |
755 | }}); | |
756 | } | |
757 | ||
758 | sub register_status_command { | |
da1a7f58 DM |
759 | my ($self, $description) = @_; |
760 | ||
761 | my $class = ref($self); | |
390802ab DM |
762 | |
763 | $class->register_method({ | |
764 | name => 'status', | |
765 | path => 'status', | |
766 | method => 'GET', | |
767 | description => "Get daemon status.", | |
768 | parameters => { | |
769 | additionalProperties => 0, | |
770 | properties => {}, | |
771 | }, | |
772 | returns => { | |
773 | type => 'string', | |
774 | enum => ['stopped', 'running'], | |
775 | }, | |
776 | code => sub { | |
777 | my ($param) = @_; | |
778 | ||
779 | return $self->running() ? 'running' : 'stopped'; | |
780 | }}); | |
781 | } | |
782 | ||
517c1125 DM |
783 | # some useful helper |
784 | ||
785 | sub create_reusable_socket { | |
786 | my ($self, $port, $host) = @_; | |
787 | ||
788 | die "no port specifed" if !$port; | |
789 | ||
790 | my ($socket, $sockfd); | |
791 | ||
792 | if (defined($sockfd = $ENV{"PVE_DAEMON_SOCKET_$port"}) && | |
793 | $self->{env_restart_pve_daemon}) { | |
794 | ||
795 | die "unable to parse socket fd '$sockfd'\n" | |
796 | if $sockfd !~ m/^(\d+)$/; | |
797 | $sockfd = $1; # untaint | |
798 | ||
799 | $socket = IO::Socket::INET->new; | |
800 | $socket->fdopen($sockfd, 'w') || | |
801 | die "cannot fdopen file descriptor '$sockfd' - $!\n"; | |
802 | ||
803 | } else { | |
804 | ||
805 | $socket = IO::Socket::INET->new( | |
806 | LocalAddr => $host, | |
807 | LocalPort => $port, | |
808 | Listen => SOMAXCONN, | |
809 | Proto => 'tcp', | |
810 | ReuseAddr => 1) || | |
811 | die "unable to create socket - $@\n"; | |
812 | ||
813 | # we often observe delays when using Nagle algorithm, | |
814 | # so we disable that to maximize performance | |
815 | setsockopt($socket, IPPROTO_TCP, TCP_NODELAY, 1); | |
816 | ||
817 | $ENV{"PVE_DAEMON_SOCKET_$port"} = $socket->fileno; | |
818 | } | |
819 | ||
820 | # remove FD_CLOEXEC bit to reuse on exec | |
821 | $socket->fcntl(Fcntl::F_SETFD(), 0); | |
822 | ||
823 | return $socket; | |
824 | } | |
825 | ||
826 | ||
390802ab DM |
827 | 1; |
828 |