3 extern void *cgroups_main(void *ptr);
5 void netdata_cleanup_and_exit(int ret) {
8 error_log_limit_unlimited();
10 info("Called: netdata_cleanup_and_exit()");
11 #ifdef NETDATA_INTERNAL_CHECKS
19 if(unlink(pidfile) != 0)
20 error("Cannot unlink pidfile '%s'.", pidfile);
23 info("NetData exiting. Bye bye...");
27 struct netdata_static_thread {
37 void (*init_routine) (void);
38 void *(*start_routine) (void *);
39 } static_threads[] = {
40 #ifdef INTERNAL_PLUGIN_NFACCT
41 // nfacct requires root access
42 // so, we build it as an external plugin with setuid to root
43 {"nfacct", "plugins", "nfacct", 1, NULL, NULL, nfacct_main},
46 {"tc", "plugins", "tc", 1, NULL, NULL, tc_main},
47 {"idlejitter", "plugins", "idlejitter", 1, NULL, NULL, cpuidlejitter_main},
48 {"proc", "plugins", "proc", 1, NULL, NULL, proc_main},
49 {"cgroups", "plugins", "cgroups", 1, NULL, NULL, cgroups_main},
50 {"check", "plugins", "checks", 0, NULL, NULL, checks_main},
51 {"health", NULL, NULL, 1, NULL, NULL, health_main},
52 {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main},
53 {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main_multi_threaded},
54 {"web-single-threaded", NULL, NULL, 0, NULL, NULL, socket_listen_main_single_threaded},
55 {NULL, NULL, NULL, 0, NULL, NULL, NULL}
58 void web_server_threading_selection(void) {
59 int threaded = config_get_boolean("global", "multi threaded web server", 1);
62 for(i = 0; static_threads[i].name ; i++) {
63 if(static_threads[i].start_routine == socket_listen_main_multi_threaded)
64 static_threads[i].enabled = threaded?1:0;
66 if(static_threads[i].start_routine == socket_listen_main_single_threaded)
67 static_threads[i].enabled = threaded?0:1;
70 web_client_timeout = (int) config_get_number("global", "disconnect idle web clients after seconds", DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS);
72 web_donotrack_comply = config_get_boolean("global", "respect web browser do not track policy", web_donotrack_comply);
74 #ifdef NETDATA_WITH_ZLIB
75 web_enable_gzip = config_get_boolean("global", "enable web responses gzip compression", web_enable_gzip);
77 char *s = config_get("global", "web compression strategy", "default");
78 if(!strcmp(s, "default"))
79 web_gzip_strategy = Z_DEFAULT_STRATEGY;
80 else if(!strcmp(s, "filtered"))
81 web_gzip_strategy = Z_FILTERED;
82 else if(!strcmp(s, "huffman only"))
83 web_gzip_strategy = Z_HUFFMAN_ONLY;
84 else if(!strcmp(s, "rle"))
85 web_gzip_strategy = Z_RLE;
86 else if(!strcmp(s, "fixed"))
87 web_gzip_strategy = Z_FIXED;
89 error("Invalid compression strategy '%s'. Valid strategies are 'default', 'filtered', 'huffman only', 'rle' and 'fixed'. Proceeding with 'default'.", s);
90 web_gzip_strategy = Z_DEFAULT_STRATEGY;
93 web_gzip_level = (int)config_get_number("global", "web compression level", 3);
94 if(web_gzip_level < 1) {
95 error("Invalid compression level %d. Valid levels are 1 (fastest) to 9 (best ratio). Proceeding with level 1 (fastest compression).", web_gzip_level);
98 else if(web_gzip_level > 9) {
99 error("Invalid compression level %d. Valid levels are 1 (fastest) to 9 (best ratio). Proceeding with level 9 (best compression).", web_gzip_level);
102 #endif /* NETDATA_WITH_ZLIB */
106 int killpid(pid_t pid, int sig)
109 debug(D_EXIT, "Request to kill pid %d", pid);
112 if(kill(pid, 0) == -1) {
115 error("Request to kill pid %d, but it is not running.", pid);
119 error("Request to kill pid %d, but I do not have enough permissions.", pid);
123 error("Request to kill pid %d, but I received an error.", pid);
129 ret = kill(pid, sig);
133 error("Cannot kill pid %d, but it is not running.", pid);
137 error("Cannot kill pid %d, but I do not have enough permissions.", pid);
141 error("Cannot kill pid %d, but I received an error.", pid);
154 struct web_client *w;
155 for(w = web_clients; w ; w = w->next) {
156 debug(D_EXIT, "Stopping web client %s", w->client_ip);
157 pthread_cancel(w->thread);
158 pthread_join(w->thread, NULL);
162 for (i = 0; static_threads[i].name != NULL ; i++) {
163 if(static_threads[i].thread) {
164 debug(D_EXIT, "Stopping %s thread", static_threads[i].name);
165 pthread_cancel(*static_threads[i].thread);
166 pthread_join(*static_threads[i].thread, NULL);
167 static_threads[i].thread = NULL;
172 info("Killing tc-qos-helper procees");
173 if(killpid(tc_child_pid, SIGTERM) != -1)
174 waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
179 for(cd = pluginsd_root ; cd ; cd = cd->next) {
180 debug(D_EXIT, "Stopping %s plugin thread", cd->id);
181 pthread_cancel(cd->thread);
182 pthread_join(cd->thread, NULL);
184 if(cd->pid && !cd->obsolete) {
185 debug(D_EXIT, "killing %s plugin process", cd->id);
186 if(killpid(cd->pid, SIGTERM) != -1)
187 waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
191 // if, for any reason there is any child exited
193 waitid(P_PID, 0, &info, WEXITED|WNOHANG);
195 debug(D_EXIT, "All threads/childs stopped.");
198 struct option_def options[] = {
199 // opt description arg name default value
200 {'c', "Load alternate configuration file", "config_file", CONFIG_DIR "/" CONFIG_FILENAME},
201 {'D', "Disable fork into background", NULL, NULL},
202 {'h', "Display help message", NULL, NULL},
203 {'P', "File to save a pid while running", "FILE", NULL},
204 {'i', "The IP address to listen to.", "address", "All addresses"},
205 {'k', "Check daemon configuration.", NULL, NULL},
206 {'p', "Port to listen. Can be from 1 to 65535.", "port_number", "19999"},
207 {'s', "Path to access host /proc and /sys when running in a container.", "PATH", NULL},
208 {'t', "The frequency in seconds, for data collection. \
209 Same as 'update every' config file option.", "seconds", "1"},
210 {'u', "System username to run as.", "username", "netdata"},
211 {'v', "Version of the program", NULL, NULL},
212 {'W', "vendor options.", "stacksize=N|unittest|debug_flags=N", NULL},
215 void help(int exitcode) {
222 int num_opts = sizeof(options) / sizeof(struct option_def);
226 // Compute maximum argument length
227 for( i = 0; i < num_opts; i++ ) {
228 if(options[i].arg_name) {
229 int len_arg = (int)strlen(options[i].arg_name);
230 if(len_arg > max_len_arg) max_len_arg = len_arg;
234 fprintf(stream, "SYNOPSIS: netdata [options]\n");
235 fprintf(stream, "\n");
236 fprintf(stream, "Options:\n");
238 // Output options description.
239 for( i = 0; i < num_opts; i++ ) {
240 fprintf(stream, " -%c %-*s %s", options[i].val, max_len_arg, options[i].arg_name ? options[i].arg_name : "", options[i].description);
241 if(options[i].default_value) {
242 fprintf(stream, " Default: %s\n", options[i].default_value);
244 fprintf(stream, "\n");
252 // TODO: Remove this function with the nix major release.
253 void remove_option(int opt_index, int *argc, char **argv) {
255 // remove the options.
258 for(i = opt_index; i < *argc; i++) {
262 } while(argv[i][0] != '-' && opt_index >= *argc);
265 static const char *verify_required_directory(const char *dir) {
267 fatal("Cannot cd to directory '%s'", dir);
269 DIR *d = opendir(dir);
271 fatal("Cannot examine the contents of directory '%s'", dir);
277 int main(int argc, char **argv)
279 char *hostname = "localhost";
280 int i, check_config = 0;
281 int config_loaded = 0;
283 size_t wanted_stacksize = 0, stacksize = 0;
286 // set the name for logging
287 program_name = "netdata";
289 // parse depercated options
290 // TODO: Remove this block with the next major release.
294 if(strcmp(argv[i], "-pidfile") == 0 && (i+1) < argc) {
295 strncpyz(pidfile, argv[i+1], FILENAME_MAX);
296 fprintf(stderr, "%s: deprecated option -- %s -- please use -P instead.\n", argv[0], argv[i]);
297 remove_option(i, &argc, argv);
299 else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) {
301 fprintf(stderr, "%s: deprecated option -- %s -- please use -D instead.\n ", argv[0], argv[i]);
302 remove_option(i, &argc, argv);
304 else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) {
305 config_set("global", "host access prefix", argv[i+1]);
306 fprintf(stderr, "%s: deprecated option -- %s -- please use -s instead.\n", argv[0], argv[i]);
307 remove_option(i, &argc, argv);
309 else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) {
310 config_set("global", "history", argv[i+1]);
311 fprintf(stderr, "%s: deprecated option -- %s -- This option will be removed with V2.*.\n", argv[0], argv[i]);
312 remove_option(i, &argc, argv);
320 int num_opts = sizeof(options) / sizeof(struct option_def);
321 char optstring[(num_opts * 2) + 1];
324 for( i = 0; i < num_opts; i++ ) {
325 optstring[string_i] = options[i].val;
327 if(options[i].arg_name) {
328 optstring[string_i] = ':';
334 while( (opt = getopt(argc, argv, optstring)) != -1 ) {
337 if(load_config(optarg, 1) != 1) {
338 error("Cannot load configuration file %s.", optarg);
342 debug(D_OPTIONS, "Configuration loaded from %s.", optarg);
353 config_set("global", "bind to", optarg);
360 strncpy(pidfile, optarg, FILENAME_MAX);
361 pidfile[FILENAME_MAX] = '\0';
364 config_set("global", "default port", optarg);
367 config_set("global", "host access prefix", optarg);
370 config_set("global", "update every", optarg);
373 config_set("global", "run as user", optarg);
376 // TODO: Outsource version to makefile which can compute version from git.
377 printf("netdata " VERSION "\n");
381 char* stacksize_string = "stacksize=";
382 char* debug_flags_string = "debug_flags=";
383 if(strcmp(optarg, "unittest") == 0) {
384 rrd_update_every = 1;
385 if(run_all_mockup_tests()) exit(1);
386 if(unit_test_storage()) exit(1);
387 fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
389 } else if(strncmp(optarg, stacksize_string, strlen(stacksize_string)) == 0) {
390 optarg += strlen(stacksize_string);
391 config_set("global", "pthread stack size", optarg);
392 } else if(strncmp(optarg, debug_flags_string, strlen(debug_flags_string)) == 0) {
393 optarg += strlen(debug_flags_string);
394 config_set("global", "debug flags", optarg);
395 debug_flags = strtoull(optarg, NULL, 0);
407 load_config(NULL, 0);
410 char *pmax = config_get("global", "glibc malloc arena max for plugins", "1");
412 setenv("MALLOC_ARENA_MAX", pmax, 1);
414 #if defined(HAVE_C_MALLOPT)
415 int i = config_get_number("global", "glibc malloc arena max for netdata", 1);
417 mallopt(M_ARENA_MAX, 1);
420 char *config_dir = config_get("global", "config directory", CONFIG_DIR);
422 // prepare configuration environment variables for the plugins
423 setenv("NETDATA_CONFIG_DIR" , verify_required_directory(config_dir) , 1);
424 setenv("NETDATA_PLUGINS_DIR", verify_required_directory(config_get("global", "plugins directory" , PLUGINS_DIR)), 1);
425 setenv("NETDATA_WEB_DIR" , verify_required_directory(config_get("global", "web files directory", WEB_DIR)) , 1);
426 setenv("NETDATA_CACHE_DIR" , verify_required_directory(config_get("global", "cache directory" , CACHE_DIR)) , 1);
427 setenv("NETDATA_LIB_DIR" , verify_required_directory(config_get("global", "lib directory" , VARLIB_DIR)) , 1);
428 setenv("NETDATA_LOG_DIR" , verify_required_directory(config_get("global", "log directory" , LOG_DIR)) , 1);
430 setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
431 setenv("HOME" , config_get("global", "home directory" , CACHE_DIR) , 1);
433 // disable buffering for python plugins
434 setenv("PYTHONUNBUFFERED", "1", 1);
436 // avoid flood calls to stat(/etc/localtime)
437 // http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
438 setenv("TZ", ":/etc/localtime", 0);
440 // work while we are cd into config_dir
441 // to allow the plugins refer to their config
442 // files using relative filenames
443 if(chdir(config_dir) == -1)
444 fatal("Cannot cd to '%s'", config_dir);
446 char path[1024 + 1], *p = getenv("PATH");
447 if(!p) p = "/bin:/usr/bin";
448 snprintfz(path, 1024, "%s:%s", p, "/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin");
449 setenv("PATH", config_get("plugins", "PATH environment variable", path), 1);
454 char *flags = config_get("global", "debug flags", "0x00000000");
455 setenv("NETDATA_DEBUG_FLAGS", flags, 1);
457 debug_flags = strtoull(flags, NULL, 0);
458 debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
460 if(debug_flags != 0) {
461 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
462 if(setrlimit(RLIMIT_CORE, &rl) != 0)
463 info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
464 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
467 // --------------------------------------------------------------------
469 #ifdef MADV_MERGEABLE
470 enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
472 #warning "Kernel memory deduplication (KSM) is not available"
475 // --------------------------------------------------------------------
477 global_host_prefix = config_get("global", "host access prefix", "");
478 setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
482 get_system_pid_max();
484 // --------------------------------------------------------------------
486 stdout_filename = config_get("global", "debug log", LOG_DIR "/debug.log");
487 stderr_filename = config_get("global", "error log", LOG_DIR "/error.log");
488 stdaccess_filename = config_get("global", "access log", LOG_DIR "/access.log");
490 error_log_throttle_period_backup =
491 error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
492 setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get("global", "errors flood protection period" , ""), 1);
494 error_log_errors_per_period = (unsigned long)config_get_number("global", "errors to trigger flood protection", error_log_errors_per_period);
495 setenv("NETDATA_ERRORS_PER_PERIOD" , config_get("global", "errors to trigger flood protection", ""), 1);
498 stdout_filename = stderr_filename = stdaccess_filename = "system";
499 error_log_throttle_period = 0;
500 error_log_errors_per_period = 0;
502 error_log_limit_unlimited();
504 // --------------------------------------------------------------------
506 rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
508 // --------------------------------------------------------------------
511 char hostnamebuf[HOSTNAME_MAX + 1];
512 if(gethostname(hostnamebuf, HOSTNAME_MAX) == -1)
513 error("WARNING: Cannot get machine hostname.");
514 hostname = config_get("global", "hostname", hostnamebuf);
515 debug(D_OPTIONS, "hostname set to '%s'", hostname);
516 setenv("NETDATA_HOSTNAME", hostname, 1);
519 // --------------------------------------------------------------------
521 rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
522 if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
523 info("Invalid save lines %d given. Defaulting to %d.", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
524 rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
527 debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
530 // --------------------------------------------------------------------
532 rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
533 if(rrd_update_every < 1 || rrd_update_every > 600) {
534 info("Invalid update timer %d given. Defaulting to %d.", rrd_update_every, UPDATE_EVERY_MAX);
535 rrd_update_every = UPDATE_EVERY;
537 else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
539 // let the plugins know the min update_every
542 snprintfz(buf, 15, "%d", rrd_update_every);
543 setenv("NETDATA_UPDATE_EVERY", buf, 1);
546 // --------------------------------------------------------------------
548 // block signals while initializing threads.
549 // this causes the threads to block signals.
552 if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1)
553 error("Could not block signals for threads");
555 // Catch signals which we want to use
559 // ingore all signals while we run in a signal handler
560 sigfillset(&sa.sa_mask);
562 // INFO: If we add signals here we have to unblock them
563 // at popen.c when running a external plugin.
565 // Ignore SIGPIPE completely.
566 sa.sa_handler = SIG_IGN;
567 if(sigaction(SIGPIPE, &sa, NULL) == -1)
568 error("Failed to change signal handler for SIGPIPE");
570 sa.sa_handler = sig_handler_exit;
571 if(sigaction(SIGINT, &sa, NULL) == -1)
572 error("Failed to change signal handler for SIGINT");
574 sa.sa_handler = sig_handler_exit;
575 if(sigaction(SIGTERM, &sa, NULL) == -1)
576 error("Failed to change signal handler for SIGTERM");
578 sa.sa_handler = sig_handler_logrotate;
579 if(sigaction(SIGHUP, &sa, NULL) == -1)
580 error("Failed to change signal handler for SIGHUP");
582 // save database on SIGUSR1
583 sa.sa_handler = sig_handler_save;
584 if(sigaction(SIGUSR1, &sa, NULL) == -1)
585 error("Failed to change signal handler for SIGUSR1");
587 // reload health configuration on SIGUSR2
588 sa.sa_handler = sig_handler_reload_health;
589 if(sigaction(SIGUSR2, &sa, NULL) == -1)
590 error("Failed to change signal handler for SIGUSR2");
592 // --------------------------------------------------------------------
594 i = pthread_attr_init(&attr);
596 fatal("pthread_attr_init() failed with code %d.", i);
598 i = pthread_attr_getstacksize(&attr, &stacksize);
600 fatal("pthread_attr_getstacksize() failed with code %d.", i);
602 debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
604 wanted_stacksize = (size_t)config_get_number("global", "pthread stack size", (long)stacksize);
606 // --------------------------------------------------------------------
608 for (i = 0; static_threads[i].name != NULL ; i++) {
609 struct netdata_static_thread *st = &static_threads[i];
611 if(st->config_name) st->enabled = config_get_boolean(st->config_section, st->config_name, st->enabled);
612 if(st->enabled && st->init_routine) st->init_routine();
615 // --------------------------------------------------------------------
617 // get the user we should run
618 // IMPORTANT: this is required before web_files_uid()
619 user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
621 // IMPORTANT: these have to run once, while single threaded
622 web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid()
625 // --------------------------------------------------------------------
628 create_listen_sockets();
631 // initialize the log files
632 open_all_log_files();
634 #ifdef NETDATA_INTERNAL_CHECKS
635 if(debug_flags != 0) {
636 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
637 if(setrlimit(RLIMIT_CORE, &rl) != 0)
638 info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
639 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
641 #endif /* NETDATA_INTERNAL_CHECKS */
643 // fork, switch user, create pid file, set process priority
644 if(become_daemon(dont_fork, user) == -1)
645 fatal("Cannot demonize myself.");
647 info("NetData started on pid %d", getpid());
650 // ------------------------------------------------------------------------
651 // get default pthread stack size
653 if(stacksize < wanted_stacksize) {
654 i = pthread_attr_setstacksize(&attr, wanted_stacksize);
656 fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
658 info("Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
661 // ------------------------------------------------------------------------
662 // initialize rrd host
664 rrdhost_init(hostname);
666 // ------------------------------------------------------------------------
667 // initialize the registry
671 // ------------------------------------------------------------------------
672 // initialize health monitoring
679 // ------------------------------------------------------------------------
680 // enable log flood protection
682 error_log_limit_reset();
684 // ------------------------------------------------------------------------
687 web_server_threading_selection();
689 for (i = 0; static_threads[i].name != NULL ; i++) {
690 struct netdata_static_thread *st = &static_threads[i];
693 st->thread = mallocz(sizeof(pthread_t));
695 info("Starting thread %s.", st->name);
697 if(pthread_create(st->thread, &attr, st->start_routine, NULL))
698 error("failed to create new thread for %s.", st->name);
700 else if(pthread_detach(*st->thread))
701 error("Cannot request detach of newly created %s thread.", st->name);
703 else info("Not starting thread %s.", st->name);
706 // ------------------------------------------------------------------------
707 // block signals while initializing threads.
711 if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
712 error("Could not unblock signals for threads");
715 // Handle flags set in the signal handler.
719 info("Exit main loop of netdata.");
720 netdata_cleanup_and_exit(0);