3 extern void *cgroups_main(void *ptr);
5 void netdata_cleanup_and_exit(int ret) {
8 error_log_limit_unlimited();
10 debug(D_EXIT, "Called: netdata_cleanup_and_exit()");
17 if(unlink(pidfile) != 0)
18 error("Cannot unlink pidfile '%s'.", pidfile);
21 #ifdef NETDATA_INTERNAL_CHECKS
29 info("netdata exiting. Bye bye...");
33 struct netdata_static_thread static_threads[] = {
34 #ifdef INTERNAL_PLUGIN_NFACCT
35 // nfacct requires root access
36 // so, we build it as an external plugin with setuid to root
37 {"nfacct", "plugins", "nfacct", 1, NULL, NULL, nfacct_main},
40 {"tc", "plugins", "tc", 1, NULL, NULL, tc_main},
41 {"idlejitter", "plugins", "idlejitter", 1, NULL, NULL, cpuidlejitter_main},
42 #if defined(__FreeBSD__)
43 {"freebsd", "plugins", "freebsd", 1, NULL, NULL, freebsd_main},
44 #elif defined(__APPLE__)
45 {"macos", "plugins", "macos", 1, NULL, NULL, macos_main},
47 {"proc", "plugins", "proc", 1, NULL, NULL, proc_main},
48 {"diskspace", "plugins", "diskspace", 1, NULL, NULL, proc_diskspace_main},
49 {"cgroups", "plugins", "cgroups", 1, NULL, NULL, cgroups_main},
50 #endif /* __FreeBSD__, __APPLE__*/
51 {"check", "plugins", "checks", 0, NULL, NULL, checks_main},
52 {"backends", NULL, NULL, 1, NULL, NULL, backends_main},
53 {"health", NULL, NULL, 1, NULL, NULL, health_main},
54 {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main},
55 {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main_multi_threaded},
56 {"web-single-threaded", NULL, NULL, 0, NULL, NULL, socket_listen_main_single_threaded},
57 {NULL, NULL, NULL, 0, NULL, NULL, NULL}
60 void web_server_threading_selection(void) {
61 int threaded = config_get_boolean("global", "multi threaded web server", 1);
64 for(i = 0; static_threads[i].name ; i++) {
65 if(static_threads[i].start_routine == socket_listen_main_multi_threaded)
66 static_threads[i].enabled = threaded?1:0;
68 if(static_threads[i].start_routine == socket_listen_main_single_threaded)
69 static_threads[i].enabled = threaded?0:1;
72 web_client_timeout = (int) config_get_number("global", "disconnect idle web clients after seconds", DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS);
74 web_donotrack_comply = config_get_boolean("global", "respect web browser do not track policy", web_donotrack_comply);
76 #ifdef NETDATA_WITH_ZLIB
77 web_enable_gzip = config_get_boolean("global", "enable web responses gzip compression", web_enable_gzip);
79 char *s = config_get("global", "web compression strategy", "default");
80 if(!strcmp(s, "default"))
81 web_gzip_strategy = Z_DEFAULT_STRATEGY;
82 else if(!strcmp(s, "filtered"))
83 web_gzip_strategy = Z_FILTERED;
84 else if(!strcmp(s, "huffman only"))
85 web_gzip_strategy = Z_HUFFMAN_ONLY;
86 else if(!strcmp(s, "rle"))
87 web_gzip_strategy = Z_RLE;
88 else if(!strcmp(s, "fixed"))
89 web_gzip_strategy = Z_FIXED;
91 error("Invalid compression strategy '%s'. Valid strategies are 'default', 'filtered', 'huffman only', 'rle' and 'fixed'. Proceeding with 'default'.", s);
92 web_gzip_strategy = Z_DEFAULT_STRATEGY;
95 web_gzip_level = (int)config_get_number("global", "web compression level", 3);
96 if(web_gzip_level < 1) {
97 error("Invalid compression level %d. Valid levels are 1 (fastest) to 9 (best ratio). Proceeding with level 1 (fastest compression).", web_gzip_level);
100 else if(web_gzip_level > 9) {
101 error("Invalid compression level %d. Valid levels are 1 (fastest) to 9 (best ratio). Proceeding with level 9 (best compression).", web_gzip_level);
104 #endif /* NETDATA_WITH_ZLIB */
108 int killpid(pid_t pid, int sig)
111 debug(D_EXIT, "Request to kill pid %d", pid);
114 if(kill(pid, 0) == -1) {
117 error("Request to kill pid %d, but it is not running.", pid);
121 error("Request to kill pid %d, but I do not have enough permissions.", pid);
125 error("Request to kill pid %d, but I received an error.", pid);
131 ret = kill(pid, sig);
135 error("Cannot kill pid %d, but it is not running.", pid);
139 error("Cannot kill pid %d, but I do not have enough permissions.", pid);
143 error("Cannot kill pid %d, but I received an error.", pid);
154 error_log_limit_unlimited();
158 struct web_client *w;
159 for(w = web_clients; w ; w = w->next) {
160 info("Stopping web client %s", w->client_ip);
161 pthread_cancel(w->thread);
163 // pthread_join(w->thread, NULL);
169 for (i = 0; static_threads[i].name != NULL ; i++) {
170 if(static_threads[i].enabled) {
171 info("Stopping %s thread", static_threads[i].name);
172 pthread_cancel(*static_threads[i].thread);
174 // pthread_join(*static_threads[i].thread, NULL);
176 static_threads[i].enabled = 0;
181 info("Killing tc-qos-helper process %d", tc_child_pid);
182 if(killpid(tc_child_pid, SIGTERM) != -1)
183 waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
189 for(cd = pluginsd_root ; cd ; cd = cd->next) {
190 if(cd->enabled && !cd->obsolete) {
191 info("Stopping %s plugin thread", cd->id);
192 pthread_cancel(cd->thread);
195 info("killing %s plugin child process pid %d", cd->id, cd->pid);
196 if(killpid(cd->pid, SIGTERM) != -1)
197 waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
206 // if, for any reason there is any child exited
208 info("Cleaning up an other children");
209 waitid(P_PID, 0, &info, WEXITED|WNOHANG);
211 info("All threads/childs stopped.");
214 struct option_def options[] = {
215 // opt description arg name default value
216 { 'c', "Configuration file to load.", "filename", CONFIG_DIR "/" CONFIG_FILENAME},
217 { 'D', "Do not fork. Run in the foreground.", NULL, "run in the background"},
218 { 'h', "Display this help message.", NULL, NULL},
219 { 'P', "File to save a pid while running.", "filename", "do not save pid to a file"},
220 { 'i', "The IP address to listen to.", "IP", "all IP addresses IPv4 and IPv6"},
221 { 'k', "Check health configuration and exit.", NULL, NULL},
222 { 'p', "API/Web port to use.", "port", "19999"},
223 { 's', "Prefix for /proc and /sys (for containers).", "path", "no prefix"},
224 { 't', "The internal clock of netdata.", "seconds", "1"},
225 { 'u', "Run as user.", "username", "netdata"},
226 { 'v', "Print netdata version and exit.", NULL, NULL},
227 { 'W', "See Advanced options below.", "options", NULL},
230 void help(int exitcode) {
237 int num_opts = sizeof(options) / sizeof(struct option_def);
241 // Compute maximum argument length
242 for( i = 0; i < num_opts; i++ ) {
243 if(options[i].arg_name) {
244 int len_arg = (int)strlen(options[i].arg_name);
245 if(len_arg > max_len_arg) max_len_arg = len_arg;
249 if(max_len_arg > 30) max_len_arg = 30;
250 if(max_len_arg < 20) max_len_arg = 20;
252 fprintf(stream, "%s", "\n"
254 " |.-. .-. .-. .-. . netdata \n"
255 " | '-' '-' '-' '-' real-time performance monitoring, done right! \n"
256 " +----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--->\n"
258 " Copyright (C) 2016-2017, Costa Tsaousis <costa@tsaousis.gr>\n"
259 " Released under GNU Public License v3 or later.\n"
260 " All rights reserved.\n"
262 " Home Page : https://my-netdata.io\n"
263 " Source Code: https://github.com/firehol/netdata\n"
264 " Wiki / Docs: https://github.com/firehol/netdata/wiki\n"
265 " Support : https://github.com/firehol/netdata/issues\n"
266 " License : https://github.com/firehol/netdata/blob/master/LICENSE.md\n"
268 " Twitter : https://twitter.com/linuxnetdata\n"
269 " Facebook : https://www.facebook.com/linuxnetdata/\n"
271 " netdata is a https://firehol.org project.\n"
276 fprintf(stream, " SYNOPSIS: netdata [options]\n");
277 fprintf(stream, "\n");
278 fprintf(stream, " Options:\n\n");
280 // Output options description.
281 for( i = 0; i < num_opts; i++ ) {
282 fprintf(stream, " -%c %-*s %s", options[i].val, max_len_arg, options[i].arg_name ? options[i].arg_name : "", options[i].description);
283 if(options[i].default_value) {
284 fprintf(stream, "\n %c %-*s Default: %s\n", ' ', max_len_arg, "", options[i].default_value);
286 fprintf(stream, "\n");
288 fprintf(stream, "\n");
291 fprintf(stream, "\n Advanced options:\n\n"
292 " -W stacksize=N Set the stacksize (in bytes).\n\n"
293 " -W debug_flags=N Set runtime tracing to debug.log.\n\n"
294 " -W unittest Run internal unittests and exit.\n\n"
295 " -W simple-pattern pattern string\n"
296 " Check if string matches pattern and exit.\n\n"
299 fprintf(stream, "\n Signals netdata handles:\n\n"
300 " - HUP Close and reopen log files.\n"
301 " - USR1 Save internal DB to disk.\n"
302 " - USR2 Reload health configuration.\n"
310 // TODO: Remove this function with the nix major release.
311 void remove_option(int opt_index, int *argc, char **argv) {
313 // remove the options.
316 for(i = opt_index; i < *argc; i++) {
320 } while(argv[i][0] != '-' && opt_index >= *argc);
323 static const char *verify_required_directory(const char *dir) {
325 fatal("Cannot cd to directory '%s'", dir);
327 DIR *d = opendir(dir);
329 fatal("Cannot examine the contents of directory '%s'", dir);
335 int main(int argc, char **argv)
337 char *hostname = "localhost";
338 int i, check_config = 0;
339 int config_loaded = 0;
341 size_t wanted_stacksize = 0, stacksize = 0;
344 // set the name for logging
345 program_name = "netdata";
347 // parse depercated options
348 // TODO: Remove this block with the next major release.
352 if(strcmp(argv[i], "-pidfile") == 0 && (i+1) < argc) {
353 strncpyz(pidfile, argv[i+1], FILENAME_MAX);
354 fprintf(stderr, "%s: deprecated option -- %s -- please use -P instead.\n", argv[0], argv[i]);
355 remove_option(i, &argc, argv);
357 else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) {
359 fprintf(stderr, "%s: deprecated option -- %s -- please use -D instead.\n ", argv[0], argv[i]);
360 remove_option(i, &argc, argv);
362 else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) {
363 config_set("global", "host access prefix", argv[i+1]);
364 fprintf(stderr, "%s: deprecated option -- %s -- please use -s instead.\n", argv[0], argv[i]);
365 remove_option(i, &argc, argv);
367 else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) {
368 config_set("global", "history", argv[i+1]);
369 fprintf(stderr, "%s: deprecated option -- %s -- This option will be removed with V2.*.\n", argv[0], argv[i]);
370 remove_option(i, &argc, argv);
378 int num_opts = sizeof(options) / sizeof(struct option_def);
379 char optstring[(num_opts * 2) + 1];
382 for( i = 0; i < num_opts; i++ ) {
383 optstring[string_i] = options[i].val;
385 if(options[i].arg_name) {
386 optstring[string_i] = ':';
390 // terminate optstring
391 optstring[string_i] ='\0';
392 optstring[(num_opts *2)] ='\0';
395 while( (opt = getopt(argc, argv, optstring)) != -1 ) {
398 if(load_config(optarg, 1) != 1) {
399 error("Cannot load configuration file %s.", optarg);
403 debug(D_OPTIONS, "Configuration loaded from %s.", optarg);
414 config_set("global", "bind to", optarg);
421 strncpy(pidfile, optarg, FILENAME_MAX);
422 pidfile[FILENAME_MAX] = '\0';
425 config_set("global", "default port", optarg);
428 config_set("global", "host access prefix", optarg);
431 config_set("global", "update every", optarg);
434 config_set("global", "run as user", optarg);
437 // TODO: Outsource version to makefile which can compute version from git.
438 printf("netdata %s\n", VERSION);
442 char* stacksize_string = "stacksize=";
443 char* debug_flags_string = "debug_flags=";
444 if(strcmp(optarg, "unittest") == 0) {
445 rrd_update_every = 1;
446 if(run_all_mockup_tests()) exit(1);
447 if(unit_test_storage()) exit(1);
448 fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
451 else if(strcmp(optarg, "simple-pattern") == 0) {
452 if(optind + 2 > argc) {
453 fprintf(stderr, "%s", "\nUSAGE: -W simple-pattern 'pattern' 'string'\n\n"
454 " Checks if 'pattern' matches the given 'string'.\n"
455 " - 'pattern' can be one or more space separated words.\n"
456 " - each 'word' can contain one or more asterisks.\n"
457 " - words starting with '!' give negative matches.\n"
458 " - words are processed left to right\n"
462 " > match all veth interfaces, except veth0:\n"
464 " -W simple-pattern '!veth0 veth*' 'veth12'\n"
467 " > match all *.ext files directly in /path/:\n"
468 " (this will not match *.ext files in a subdir of /path/)\n"
470 " -W simple-pattern '!/path/*/*.ext /path/*.ext' '/path/test.ext'\n"
476 const char *heystack = argv[optind];
477 const char *needle = argv[optind + 1];
479 SIMPLE_PATTERN *p = simple_pattern_create(heystack
480 , SIMPLE_PATTERN_EXACT);
481 int ret = simple_pattern_matches(p, needle);
482 simple_pattern_free(p);
485 fprintf(stdout, "RESULT: MATCHED - pattern '%s' matches '%s'\n", heystack, needle);
489 fprintf(stdout, "RESULT: NOT MATCHED - pattern '%s' does not match '%s'\n", heystack, needle);
493 else if(strncmp(optarg, stacksize_string, strlen(stacksize_string)) == 0) {
494 optarg += strlen(stacksize_string);
495 config_set("global", "pthread stack size", optarg);
497 else if(strncmp(optarg, debug_flags_string, strlen(debug_flags_string)) == 0) {
498 optarg += strlen(debug_flags_string);
499 config_set("global", "debug flags", optarg);
500 debug_flags = strtoull(optarg, NULL, 0);
512 load_config(NULL, 0);
515 char *pmax = config_get("global", "glibc malloc arena max for plugins", "1");
517 setenv("MALLOC_ARENA_MAX", pmax, 1);
519 #if defined(HAVE_C_MALLOPT)
520 int i = config_get_number("global", "glibc malloc arena max for netdata", 1);
522 mallopt(M_ARENA_MAX, 1);
525 char *config_dir = config_get("global", "config directory", CONFIG_DIR);
527 // prepare configuration environment variables for the plugins
528 setenv("NETDATA_CONFIG_DIR" , verify_required_directory(config_dir) , 1);
529 setenv("NETDATA_PLUGINS_DIR", verify_required_directory(config_get("global", "plugins directory" , PLUGINS_DIR)), 1);
530 setenv("NETDATA_WEB_DIR" , verify_required_directory(config_get("global", "web files directory", WEB_DIR)) , 1);
531 setenv("NETDATA_CACHE_DIR" , verify_required_directory(config_get("global", "cache directory" , CACHE_DIR)) , 1);
532 setenv("NETDATA_LIB_DIR" , verify_required_directory(config_get("global", "lib directory" , VARLIB_DIR)) , 1);
533 setenv("NETDATA_LOG_DIR" , verify_required_directory(config_get("global", "log directory" , LOG_DIR)) , 1);
535 setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
536 setenv("HOME" , config_get("global", "home directory" , CACHE_DIR) , 1);
538 // disable buffering for python plugins
539 setenv("PYTHONUNBUFFERED", "1", 1);
541 // avoid flood calls to stat(/etc/localtime)
542 // http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
543 setenv("TZ", ":/etc/localtime", 0);
545 // work while we are cd into config_dir
546 // to allow the plugins refer to their config
547 // files using relative filenames
548 if(chdir(config_dir) == -1)
549 fatal("Cannot cd to '%s'", config_dir);
551 char path[1024 + 1], *p = getenv("PATH");
552 if(!p) p = "/bin:/usr/bin";
553 snprintfz(path, 1024, "%s:%s", p, "/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin");
554 setenv("PATH", config_get("plugins", "PATH environment variable", path), 1);
559 char *flags = config_get("global", "debug flags", "0x00000000");
560 setenv("NETDATA_DEBUG_FLAGS", flags, 1);
562 debug_flags = strtoull(flags, NULL, 0);
563 debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
565 if(debug_flags != 0) {
566 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
567 if(setrlimit(RLIMIT_CORE, &rl) != 0)
568 error("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
570 #if !(defined(__FreeBSD__) || defined(__APPLE__))
571 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
572 #endif /* __FreeBSD__ || __APPLE__*/
575 // --------------------------------------------------------------------
577 #ifdef MADV_MERGEABLE
578 enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
580 #warning "Kernel memory deduplication (KSM) is not available"
583 // --------------------------------------------------------------------
585 global_host_prefix = config_get("global", "host access prefix", "");
586 setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
590 get_system_pid_max();
592 // --------------------------------------------------------------------
594 stdout_filename = config_get("global", "debug log", LOG_DIR "/debug.log");
595 stderr_filename = config_get("global", "error log", LOG_DIR "/error.log");
596 stdaccess_filename = config_get("global", "access log", LOG_DIR "/access.log");
598 error_log_throttle_period_backup =
599 error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
600 setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get("global", "errors flood protection period" , ""), 1);
602 error_log_errors_per_period = (unsigned long)config_get_number("global", "errors to trigger flood protection", error_log_errors_per_period);
603 setenv("NETDATA_ERRORS_PER_PERIOD" , config_get("global", "errors to trigger flood protection", ""), 1);
606 stdout_filename = stderr_filename = stdaccess_filename = "system";
607 error_log_throttle_period = 0;
608 error_log_errors_per_period = 0;
610 error_log_limit_unlimited();
612 // --------------------------------------------------------------------
614 rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
616 // --------------------------------------------------------------------
619 char hostnamebuf[HOSTNAME_MAX + 1];
620 if(gethostname(hostnamebuf, HOSTNAME_MAX) == -1)
621 error("WARNING: Cannot get machine hostname.");
622 hostname = config_get("global", "hostname", hostnamebuf);
623 debug(D_OPTIONS, "hostname set to '%s'", hostname);
624 setenv("NETDATA_HOSTNAME", hostname, 1);
627 // --------------------------------------------------------------------
629 rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
630 if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
631 error("Invalid history entries %d given. Defaulting to %d.", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
632 rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
635 debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
638 // --------------------------------------------------------------------
640 rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
641 if(rrd_update_every < 1 || rrd_update_every > 600) {
642 error("Invalid data collection frequency (update every) %d given. Defaulting to %d.", rrd_update_every, UPDATE_EVERY_MAX);
643 rrd_update_every = UPDATE_EVERY;
645 else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
647 // let the plugins know the min update_every
650 snprintfz(buf, 15, "%d", rrd_update_every);
651 setenv("NETDATA_UPDATE_EVERY", buf, 1);
654 // --------------------------------------------------------------------
656 // block signals while initializing threads.
657 // this causes the threads to block signals.
660 if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1)
661 error("Could not block signals for threads");
663 // Catch signals which we want to use
667 // ingore all signals while we run in a signal handler
668 sigfillset(&sa.sa_mask);
670 // INFO: If we add signals here we have to unblock them
671 // at popen.c when running a external plugin.
673 // Ignore SIGPIPE completely.
674 sa.sa_handler = SIG_IGN;
675 if(sigaction(SIGPIPE, &sa, NULL) == -1)
676 error("Failed to change signal handler for SIGPIPE");
678 sa.sa_handler = sig_handler_exit;
679 if(sigaction(SIGINT, &sa, NULL) == -1)
680 error("Failed to change signal handler for SIGINT");
682 sa.sa_handler = sig_handler_exit;
683 if(sigaction(SIGTERM, &sa, NULL) == -1)
684 error("Failed to change signal handler for SIGTERM");
686 sa.sa_handler = sig_handler_logrotate;
687 if(sigaction(SIGHUP, &sa, NULL) == -1)
688 error("Failed to change signal handler for SIGHUP");
690 // save database on SIGUSR1
691 sa.sa_handler = sig_handler_save;
692 if(sigaction(SIGUSR1, &sa, NULL) == -1)
693 error("Failed to change signal handler for SIGUSR1");
695 // reload health configuration on SIGUSR2
696 sa.sa_handler = sig_handler_reload_health;
697 if(sigaction(SIGUSR2, &sa, NULL) == -1)
698 error("Failed to change signal handler for SIGUSR2");
700 // --------------------------------------------------------------------
702 i = pthread_attr_init(&attr);
704 fatal("pthread_attr_init() failed with code %d.", i);
706 i = pthread_attr_getstacksize(&attr, &stacksize);
708 fatal("pthread_attr_getstacksize() failed with code %d.", i);
710 debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
712 wanted_stacksize = (size_t)config_get_number("global", "pthread stack size", (long)stacksize);
714 // --------------------------------------------------------------------
716 for (i = 0; static_threads[i].name != NULL ; i++) {
717 struct netdata_static_thread *st = &static_threads[i];
719 if(st->config_name) st->enabled = config_get_boolean(st->config_section, st->config_name, st->enabled);
720 if(st->enabled && st->init_routine) st->init_routine();
723 // --------------------------------------------------------------------
725 // get the user we should run
726 // IMPORTANT: this is required before web_files_uid()
727 user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
729 // IMPORTANT: these have to run once, while single threaded
730 web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid()
733 // --------------------------------------------------------------------
736 create_listen_sockets();
739 // initialize the log files
740 open_all_log_files();
742 #ifdef NETDATA_INTERNAL_CHECKS
743 if(debug_flags != 0) {
744 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
745 if(setrlimit(RLIMIT_CORE, &rl) != 0)
746 error("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
747 #if !(defined(__FreeBSD__) || defined(__APPLE__))
748 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
749 #endif /* __FreeBSD__ || __APPLE__*/
751 #endif /* NETDATA_INTERNAL_CHECKS */
753 // fork, switch user, create pid file, set process priority
754 if(become_daemon(dont_fork, user) == -1)
755 fatal("Cannot daemonize myself.");
757 info("netdata started on pid %d.", getpid());
759 // ------------------------------------------------------------------------
760 // get default pthread stack size
762 if(stacksize < wanted_stacksize) {
763 i = pthread_attr_setstacksize(&attr, wanted_stacksize);
765 fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
767 debug(D_SYSTEM, "Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
770 // ------------------------------------------------------------------------
771 // initialize rrd host
773 rrdhost_init(hostname);
775 // ------------------------------------------------------------------------
776 // initialize the registry
780 // ------------------------------------------------------------------------
781 // initialize health monitoring
788 // ------------------------------------------------------------------------
789 // enable log flood protection
791 error_log_limit_reset();
793 // ------------------------------------------------------------------------
796 web_server_threading_selection();
798 for (i = 0; static_threads[i].name != NULL ; i++) {
799 struct netdata_static_thread *st = &static_threads[i];
802 st->thread = mallocz(sizeof(pthread_t));
804 debug(D_SYSTEM, "Starting thread %s.", st->name);
806 if(pthread_create(st->thread, &attr, st->start_routine, st))
807 error("failed to create new thread for %s.", st->name);
809 else if(pthread_detach(*st->thread))
810 error("Cannot request detach of newly created %s thread.", st->name);
812 else debug(D_SYSTEM, "Not starting thread %s.", st->name);
815 info("netdata initialization completed. Enjoy real-time performance monitoring!");
817 // ------------------------------------------------------------------------
818 // block signals while initializing threads.
822 if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
823 error("Could not unblock signals for threads");
826 // Handle flags set in the signal handler.
830 debug(D_EXIT, "Exit main loop of netdata.");
831 netdata_cleanup_and_exit(0);