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 #endif /* __FreeBSD__, __APPLE__*/
50 {"cgroups", "plugins", "cgroups", 1, NULL, NULL, cgroups_main},
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);
167 for (i = 0; static_threads[i].name != NULL ; i++) {
168 if(static_threads[i].enabled && static_threads[i].thread) {
169 info("Stopping %s thread", static_threads[i].name);
170 pthread_cancel(*static_threads[i].thread);
172 // pthread_join(*static_threads[i].thread, NULL);
174 static_threads[i].thread = NULL;
179 info("Killing tc-qos-helper process %d", tc_child_pid);
180 if(killpid(tc_child_pid, SIGTERM) != -1)
181 waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
186 for(cd = pluginsd_root ; cd ; cd = cd->next) {
187 if(cd->enabled && !cd->obsolete) {
188 if(cd->thread != (pthread_t)NULL) {
189 info("Stopping %s plugin thread", cd->id);
190 pthread_cancel(cd->thread);
192 // pthread_join(cd->thread, NULL);
193 cd->thread = (pthread_t)NULL;
197 info("killing %s plugin child process pid %d", cd->id, cd->pid);
198 if(killpid(cd->pid, SIGTERM) != -1)
199 waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
208 // if, for any reason there is any child exited
210 info("Cleaning up an other children");
211 waitid(P_PID, 0, &info, WEXITED|WNOHANG);
213 info("All threads/childs stopped.");
216 struct option_def options[] = {
217 // opt description arg name default value
218 { 'c', "Configuration file to load.", "filename", CONFIG_DIR "/" CONFIG_FILENAME},
219 { 'D', "Do not fork. Run in the foreground.", NULL, "run in the background"},
220 { 'h', "Display this help message.", NULL, NULL},
221 { 'P', "File to save a pid while running.", "filename", "do not save pid to a file"},
222 { 'i', "The IP address to listen to.", "IP", "all IP addresses IPv4 and IPv6"},
223 { 'k', "Check health configuration and exit.", NULL, NULL},
224 { 'p', "API/Web port to use.", "port", "19999"},
225 { 's', "Prefix for /proc and /sys (for containers).", "path", "no prefix"},
226 { 't', "The internal clock of netdata.", "seconds", "1"},
227 { 'u', "Run as user.", "username", "netdata"},
228 { 'v', "Print netdata version and exit.", NULL, NULL},
229 { 'W', "See Advanced options below.", "options", NULL},
232 void help(int exitcode) {
239 int num_opts = sizeof(options) / sizeof(struct option_def);
243 // Compute maximum argument length
244 for( i = 0; i < num_opts; i++ ) {
245 if(options[i].arg_name) {
246 int len_arg = (int)strlen(options[i].arg_name);
247 if(len_arg > max_len_arg) max_len_arg = len_arg;
251 if(max_len_arg > 30) max_len_arg = 30;
252 if(max_len_arg < 20) max_len_arg = 20;
254 fprintf(stream, "%s", "\n"
256 " |.-. .-. .-. .-. . netdata \n"
257 " | '-' '-' '-' '-' real-time performance monitoring, done right! \n"
258 " +----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--->\n"
260 " Copyright (C) 2017, Costa Tsaousis <costa@tsaousis.gr>\n"
261 " Released under GNU Public License v3 or later.\n"
262 " All rights reserved.\n"
264 " Home Page : https://my-netdata.io\n"
265 " Source Code: https://github.com/firehol/netdata\n"
266 " Wiki / Docs: https://github.com/firehol/netdata/wiki\n"
267 " Support : https://github.com/firehol/netdata/issues\n"
268 " License : https://github.com/firehol/netdata/blob/master/LICENSE.md\n"
270 " Twitter : https://twitter.com/linuxnetdata\n"
271 " Facebook : https://www.facebook.com/linuxnetdata/\n"
273 " netdata is a https://firehol.org project.\n"
278 fprintf(stream, " SYNOPSIS: netdata [options]\n");
279 fprintf(stream, "\n");
280 fprintf(stream, " Options:\n\n");
282 // Output options description.
283 for( i = 0; i < num_opts; i++ ) {
284 fprintf(stream, " -%c %-*s %s", options[i].val, max_len_arg, options[i].arg_name ? options[i].arg_name : "", options[i].description);
285 if(options[i].default_value) {
286 fprintf(stream, "\n %c %-*s Default: %s\n", ' ', max_len_arg, "", options[i].default_value);
288 fprintf(stream, "\n");
290 fprintf(stream, "\n");
293 fprintf(stream, "\n Advanced options:\n\n"
294 " -W stacksize=N Set the stacksize (in bytes).\n\n"
295 " -W debug_flags=N Set runtime tracing to debug.log.\n\n"
296 " -W unittest Run internal unittests and exit.\n\n"
297 " -W simple-pattern pattern string\n"
298 " Check if string matches pattern and exit.\n\n"
301 fprintf(stream, "\n Signals netdata handles:\n\n"
302 " - HUP Close and reopen log files.\n"
303 " - USR1 Save internal DB to disk.\n"
304 " - USR2 Reload health configuration.\n"
312 // TODO: Remove this function with the nix major release.
313 void remove_option(int opt_index, int *argc, char **argv) {
315 // remove the options.
318 for(i = opt_index; i < *argc; i++) {
322 } while(argv[i][0] != '-' && opt_index >= *argc);
325 static const char *verify_required_directory(const char *dir) {
327 fatal("Cannot cd to directory '%s'", dir);
329 DIR *d = opendir(dir);
331 fatal("Cannot examine the contents of directory '%s'", dir);
337 int main(int argc, char **argv)
339 char *hostname = "localhost";
340 int i, check_config = 0;
341 int config_loaded = 0;
343 size_t wanted_stacksize = 0, stacksize = 0;
346 // set the name for logging
347 program_name = "netdata";
349 // parse depercated options
350 // TODO: Remove this block with the next major release.
354 if(strcmp(argv[i], "-pidfile") == 0 && (i+1) < argc) {
355 strncpyz(pidfile, argv[i+1], FILENAME_MAX);
356 fprintf(stderr, "%s: deprecated option -- %s -- please use -P instead.\n", argv[0], argv[i]);
357 remove_option(i, &argc, argv);
359 else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) {
361 fprintf(stderr, "%s: deprecated option -- %s -- please use -D instead.\n ", argv[0], argv[i]);
362 remove_option(i, &argc, argv);
364 else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) {
365 config_set("global", "host access prefix", argv[i+1]);
366 fprintf(stderr, "%s: deprecated option -- %s -- please use -s instead.\n", argv[0], argv[i]);
367 remove_option(i, &argc, argv);
369 else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) {
370 config_set("global", "history", argv[i+1]);
371 fprintf(stderr, "%s: deprecated option -- %s -- This option will be removed with V2.*.\n", argv[0], argv[i]);
372 remove_option(i, &argc, argv);
380 int num_opts = sizeof(options) / sizeof(struct option_def);
381 char optstring[(num_opts * 2) + 1];
384 for( i = 0; i < num_opts; i++ ) {
385 optstring[string_i] = options[i].val;
387 if(options[i].arg_name) {
388 optstring[string_i] = ':';
392 // terminate optstring
393 optstring[string_i] ='\0';
394 optstring[(num_opts *2)] ='\0';
397 while( (opt = getopt(argc, argv, optstring)) != -1 ) {
400 if(load_config(optarg, 1) != 1) {
401 error("Cannot load configuration file %s.", optarg);
405 debug(D_OPTIONS, "Configuration loaded from %s.", optarg);
416 config_set("global", "bind to", optarg);
423 strncpy(pidfile, optarg, FILENAME_MAX);
424 pidfile[FILENAME_MAX] = '\0';
427 config_set("global", "default port", optarg);
430 config_set("global", "host access prefix", optarg);
433 config_set("global", "update every", optarg);
436 config_set("global", "run as user", optarg);
439 // TODO: Outsource version to makefile which can compute version from git.
440 printf("netdata %s\n", VERSION);
444 char* stacksize_string = "stacksize=";
445 char* debug_flags_string = "debug_flags=";
446 if(strcmp(optarg, "unittest") == 0) {
447 rrd_update_every = 1;
448 if(run_all_mockup_tests()) exit(1);
449 if(unit_test_storage()) exit(1);
450 fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
453 else if(strcmp(optarg, "simple-pattern") == 0) {
454 if(optind + 2 > argc) {
455 fprintf(stderr, "%s", "\nUSAGE: -W simple-pattern 'pattern' 'string'\n\n"
456 " Checks if 'pattern' matches the given 'string'.\n"
457 " - 'pattern' can be one or more space separated words.\n"
458 " - each 'word' can contain one or more asterisks.\n"
459 " - words starting with '!' give negative matches.\n"
460 " - words are processed left to right\n"
464 " > match all veth interfaces, except veth0:\n"
466 " -W simple-pattern '!veth0 veth*' 'veth12'\n"
469 " > match all *.ext files directly in /path/:\n"
470 " (this will not match *.ext files in a subdir of /path/)\n"
472 " -W simple-pattern '!/path/*/*.ext /path/*.ext' '/path/test.ext'\n"
478 const char *heystack = argv[optind];
479 const char *needle = argv[optind + 1];
481 SIMPLE_PATTERN *p = simple_pattern_create(heystack
482 , SIMPLE_PATTERN_EXACT);
483 int ret = simple_pattern_matches(p, needle);
484 simple_pattern_free(p);
487 fprintf(stdout, "RESULT: MATCHED - pattern '%s' matches '%s'\n", heystack, needle);
491 fprintf(stdout, "RESULT: NOT MATCHED - pattern '%s' does not match '%s'\n", heystack, needle);
495 else if(strncmp(optarg, stacksize_string, strlen(stacksize_string)) == 0) {
496 optarg += strlen(stacksize_string);
497 config_set("global", "pthread stack size", optarg);
499 else if(strncmp(optarg, debug_flags_string, strlen(debug_flags_string)) == 0) {
500 optarg += strlen(debug_flags_string);
501 config_set("global", "debug flags", optarg);
502 debug_flags = strtoull(optarg, NULL, 0);
514 load_config(NULL, 0);
517 char *pmax = config_get("global", "glibc malloc arena max for plugins", "1");
519 setenv("MALLOC_ARENA_MAX", pmax, 1);
521 #if defined(HAVE_C_MALLOPT)
522 int i = config_get_number("global", "glibc malloc arena max for netdata", 1);
524 mallopt(M_ARENA_MAX, 1);
527 char *config_dir = config_get("global", "config directory", CONFIG_DIR);
529 // prepare configuration environment variables for the plugins
530 setenv("NETDATA_CONFIG_DIR" , verify_required_directory(config_dir) , 1);
531 setenv("NETDATA_PLUGINS_DIR", verify_required_directory(config_get("global", "plugins directory" , PLUGINS_DIR)), 1);
532 setenv("NETDATA_WEB_DIR" , verify_required_directory(config_get("global", "web files directory", WEB_DIR)) , 1);
533 setenv("NETDATA_CACHE_DIR" , verify_required_directory(config_get("global", "cache directory" , CACHE_DIR)) , 1);
534 setenv("NETDATA_LIB_DIR" , verify_required_directory(config_get("global", "lib directory" , VARLIB_DIR)) , 1);
535 setenv("NETDATA_LOG_DIR" , verify_required_directory(config_get("global", "log directory" , LOG_DIR)) , 1);
537 setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
538 setenv("HOME" , config_get("global", "home directory" , CACHE_DIR) , 1);
540 // disable buffering for python plugins
541 setenv("PYTHONUNBUFFERED", "1", 1);
543 // avoid flood calls to stat(/etc/localtime)
544 // http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
545 setenv("TZ", ":/etc/localtime", 0);
547 // work while we are cd into config_dir
548 // to allow the plugins refer to their config
549 // files using relative filenames
550 if(chdir(config_dir) == -1)
551 fatal("Cannot cd to '%s'", config_dir);
553 char path[1024 + 1], *p = getenv("PATH");
554 if(!p) p = "/bin:/usr/bin";
555 snprintfz(path, 1024, "%s:%s", p, "/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin");
556 setenv("PATH", config_get("plugins", "PATH environment variable", path), 1);
561 char *flags = config_get("global", "debug flags", "0x00000000");
562 setenv("NETDATA_DEBUG_FLAGS", flags, 1);
564 debug_flags = strtoull(flags, NULL, 0);
565 debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
567 if(debug_flags != 0) {
568 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
569 if(setrlimit(RLIMIT_CORE, &rl) != 0)
570 error("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
572 #if !(defined(__FreeBSD__) || defined(__APPLE__))
573 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
574 #endif /* __FreeBSD__ || __APPLE__*/
577 // --------------------------------------------------------------------
579 #ifdef MADV_MERGEABLE
580 enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
582 #warning "Kernel memory deduplication (KSM) is not available"
585 // --------------------------------------------------------------------
587 global_host_prefix = config_get("global", "host access prefix", "");
588 setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
592 get_system_pid_max();
594 // --------------------------------------------------------------------
596 stdout_filename = config_get("global", "debug log", LOG_DIR "/debug.log");
597 stderr_filename = config_get("global", "error log", LOG_DIR "/error.log");
598 stdaccess_filename = config_get("global", "access log", LOG_DIR "/access.log");
600 error_log_throttle_period_backup =
601 error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
602 setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get("global", "errors flood protection period" , ""), 1);
604 error_log_errors_per_period = (unsigned long)config_get_number("global", "errors to trigger flood protection", error_log_errors_per_period);
605 setenv("NETDATA_ERRORS_PER_PERIOD" , config_get("global", "errors to trigger flood protection", ""), 1);
608 stdout_filename = stderr_filename = stdaccess_filename = "system";
609 error_log_throttle_period = 0;
610 error_log_errors_per_period = 0;
612 error_log_limit_unlimited();
614 // --------------------------------------------------------------------
616 rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
618 // --------------------------------------------------------------------
621 char hostnamebuf[HOSTNAME_MAX + 1];
622 if(gethostname(hostnamebuf, HOSTNAME_MAX) == -1)
623 error("WARNING: Cannot get machine hostname.");
624 hostname = config_get("global", "hostname", hostnamebuf);
625 debug(D_OPTIONS, "hostname set to '%s'", hostname);
626 setenv("NETDATA_HOSTNAME", hostname, 1);
629 // --------------------------------------------------------------------
631 rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
632 if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
633 error("Invalid history entries %d given. Defaulting to %d.", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
634 rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
637 debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
640 // --------------------------------------------------------------------
642 rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
643 if(rrd_update_every < 1 || rrd_update_every > 600) {
644 error("Invalid data collection frequency (update every) %d given. Defaulting to %d.", rrd_update_every, UPDATE_EVERY_MAX);
645 rrd_update_every = UPDATE_EVERY;
647 else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
649 // let the plugins know the min update_every
652 snprintfz(buf, 15, "%d", rrd_update_every);
653 setenv("NETDATA_UPDATE_EVERY", buf, 1);
656 // --------------------------------------------------------------------
658 // block signals while initializing threads.
659 // this causes the threads to block signals.
662 if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1)
663 error("Could not block signals for threads");
665 // Catch signals which we want to use
669 // ingore all signals while we run in a signal handler
670 sigfillset(&sa.sa_mask);
672 // INFO: If we add signals here we have to unblock them
673 // at popen.c when running a external plugin.
675 // Ignore SIGPIPE completely.
676 sa.sa_handler = SIG_IGN;
677 if(sigaction(SIGPIPE, &sa, NULL) == -1)
678 error("Failed to change signal handler for SIGPIPE");
680 sa.sa_handler = sig_handler_exit;
681 if(sigaction(SIGINT, &sa, NULL) == -1)
682 error("Failed to change signal handler for SIGINT");
684 sa.sa_handler = sig_handler_exit;
685 if(sigaction(SIGTERM, &sa, NULL) == -1)
686 error("Failed to change signal handler for SIGTERM");
688 sa.sa_handler = sig_handler_logrotate;
689 if(sigaction(SIGHUP, &sa, NULL) == -1)
690 error("Failed to change signal handler for SIGHUP");
692 // save database on SIGUSR1
693 sa.sa_handler = sig_handler_save;
694 if(sigaction(SIGUSR1, &sa, NULL) == -1)
695 error("Failed to change signal handler for SIGUSR1");
697 // reload health configuration on SIGUSR2
698 sa.sa_handler = sig_handler_reload_health;
699 if(sigaction(SIGUSR2, &sa, NULL) == -1)
700 error("Failed to change signal handler for SIGUSR2");
702 // --------------------------------------------------------------------
704 i = pthread_attr_init(&attr);
706 fatal("pthread_attr_init() failed with code %d.", i);
708 i = pthread_attr_getstacksize(&attr, &stacksize);
710 fatal("pthread_attr_getstacksize() failed with code %d.", i);
712 debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
714 wanted_stacksize = (size_t)config_get_number("global", "pthread stack size", (long)stacksize);
716 // --------------------------------------------------------------------
718 for (i = 0; static_threads[i].name != NULL ; i++) {
719 struct netdata_static_thread *st = &static_threads[i];
721 if(st->config_name) st->enabled = config_get_boolean(st->config_section, st->config_name, st->enabled);
722 if(st->enabled && st->init_routine) st->init_routine();
725 // --------------------------------------------------------------------
727 // get the user we should run
728 // IMPORTANT: this is required before web_files_uid()
729 user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
731 // IMPORTANT: these have to run once, while single threaded
732 web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid()
735 // --------------------------------------------------------------------
738 create_listen_sockets();
741 // initialize the log files
742 open_all_log_files();
744 #ifdef NETDATA_INTERNAL_CHECKS
745 if(debug_flags != 0) {
746 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
747 if(setrlimit(RLIMIT_CORE, &rl) != 0)
748 error("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
749 #if !(defined(__FreeBSD__) || defined(__APPLE__))
750 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
751 #endif /* __FreeBSD__ || __APPLE__*/
753 #endif /* NETDATA_INTERNAL_CHECKS */
755 // fork, switch user, create pid file, set process priority
756 if(become_daemon(dont_fork, user) == -1)
757 fatal("Cannot daemonize myself.");
759 info("netdata started on pid %d.", getpid());
761 // ------------------------------------------------------------------------
762 // get default pthread stack size
764 if(stacksize < wanted_stacksize) {
765 i = pthread_attr_setstacksize(&attr, wanted_stacksize);
767 fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
769 debug(D_SYSTEM, "Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
772 // ------------------------------------------------------------------------
773 // initialize rrd host
775 rrdhost_init(hostname);
777 // ------------------------------------------------------------------------
778 // initialize the registry
782 // ------------------------------------------------------------------------
783 // initialize health monitoring
790 // ------------------------------------------------------------------------
791 // enable log flood protection
793 error_log_limit_reset();
795 // ------------------------------------------------------------------------
798 web_server_threading_selection();
800 for (i = 0; static_threads[i].name != NULL ; i++) {
801 struct netdata_static_thread *st = &static_threads[i];
804 st->thread = mallocz(sizeof(pthread_t));
806 debug(D_SYSTEM, "Starting thread %s.", st->name);
808 if(pthread_create(st->thread, &attr, st->start_routine, st))
809 error("failed to create new thread for %s.", st->name);
811 else if(pthread_detach(*st->thread))
812 error("Cannot request detach of newly created %s thread.", st->name);
814 else debug(D_SYSTEM, "Not starting thread %s.", st->name);
817 info("netdata initialization completed. Enjoy real-time performance monitoring!");
819 // ------------------------------------------------------------------------
820 // block signals while initializing threads.
824 if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
825 error("Could not unblock signals for threads");
828 // Handle flags set in the signal handler.
832 debug(D_EXIT, "Exit main loop of netdata.");
833 netdata_cleanup_and_exit(0);