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