12 #include <sys/types.h>
15 #include <sys/resource.h>
17 #include <sys/prctl.h>
22 #include "web_server.h"
24 #include "appconfig.h"
25 #include "web_client.h"
29 #include "unit_test.h"
31 #include "plugins_d.h"
32 #include "plugin_idlejitter.h"
33 #include "plugin_tc.h"
34 #include "plugin_checks.h"
35 #include "plugin_proc.h"
36 #include "plugin_nfacct.h"
42 void netdata_cleanup_and_exit(int ret)
49 if(ftruncate(pidfd, 0) != 0)
50 error("Cannot truncate pidfile '%s'.", pidfile);
57 if(unlink(pidfile) != 0)
58 error("Cannot unlink pidfile '%s'.", pidfile);
61 info("NetData exiting. Bye bye...");
65 struct netdata_static_thread {
75 void (*init_routine) (void);
76 void *(*start_routine) (void *);
79 struct netdata_static_thread static_threads[] = {
80 {"tc", "plugins", "tc", 1, NULL, NULL, tc_main},
81 {"idlejitter", "plugins", "idlejitter", 1, NULL, NULL, cpuidlejitter_main},
82 {"proc", "plugins", "proc", 1, NULL, NULL, proc_main},
84 #ifdef INTERNAL_PLUGIN_NFACCT
85 // nfacct requires root access
86 // so, we build it as an external plugin with setuid to root
87 {"nfacct", "plugins", "nfacct", 1, NULL, NULL, nfacct_main},
90 {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main},
91 {"check", "plugins", "checks", 0, NULL, NULL, checks_main},
92 {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main},
93 {NULL, NULL, NULL, 0, NULL, NULL, NULL}
96 int killpid(pid_t pid, int sig)
99 debug(D_EXIT, "Request to kill pid %d", pid);
102 if(kill(pid, 0) == -1) {
105 error("Request to kill pid %d, but it is not running.", pid);
109 error("Request to kill pid %d, but I do not have enough permissions.", pid);
113 error("Request to kill pid %d, but I received an error.", pid);
121 old = signal(sig, SIG_IGN);
123 error("Cannot overwrite signal handler for signal %d", sig);
127 ret = kill(pid, sig);
129 if(signal(sig, old) == SIG_ERR)
130 error("Cannot restore signal handler for signal %d", 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);
156 struct web_client *w;
157 for(w = web_clients; w ; w = w->next) {
158 debug(D_EXIT, "Stopping web client %s", w->client_ip);
159 pthread_cancel(w->thread);
160 pthread_join(w->thread, NULL);
164 for (i = 0; static_threads[i].name != NULL ; i++) {
165 if(static_threads[i].thread) {
166 debug(D_EXIT, "Stopping %s thread", static_threads[i].name);
167 pthread_cancel(*static_threads[i].thread);
168 pthread_join(*static_threads[i].thread, NULL);
169 static_threads[i].thread = NULL;
174 info("Killing tc-qos-helper procees");
175 if(killpid(tc_child_pid, SIGTERM) != -1)
176 waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
181 for(cd = pluginsd_root ; cd ; cd = cd->next) {
182 debug(D_EXIT, "Stopping %s plugin thread", cd->id);
183 pthread_cancel(cd->thread);
184 pthread_join(cd->thread, NULL);
186 if(cd->pid && !cd->obsolete) {
187 debug(D_EXIT, "killing %s plugin process", cd->id);
188 if(killpid(cd->pid, SIGTERM) != -1)
189 waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
193 // if, for any reason there is any child exited
195 waitid(P_PID, 0, &info, WEXITED|WNOHANG);
197 debug(D_EXIT, "All threads/childs stopped.");
201 int main(int argc, char **argv)
204 int config_loaded = 0;
206 size_t wanted_stacksize = 0, stacksize = 0;
209 // global initialization
212 // set the name for logging
213 program_name = "netdata";
215 // parse the arguments
216 for(i = 1; i < argc ; i++) {
217 if(strcmp(argv[i], "-c") == 0 && (i+1) < argc) {
218 if(load_config(argv[i+1], 1) != 1) {
219 error("Cannot load configuration file %s.", argv[i+1]);
223 debug(D_OPTIONS, "Configuration loaded from %s.", argv[i+1]);
228 else if(strcmp(argv[i], "-df") == 0 && (i+1) < argc) { config_set("global", "debug flags", argv[i+1]); debug_flags = strtoull(argv[i+1], NULL, 0); i++; }
229 else if(strcmp(argv[i], "-p") == 0 && (i+1) < argc) { config_set("global", "port", argv[i+1]); i++; }
230 else if(strcmp(argv[i], "-u") == 0 && (i+1) < argc) { config_set("global", "run as user", argv[i+1]); i++; }
231 else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) { config_set("global", "history", argv[i+1]); i++; }
232 else if(strcmp(argv[i], "-t") == 0 && (i+1) < argc) { config_set("global", "update every", argv[i+1]); i++; }
233 else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) { config_set("global", "host access prefix", argv[i+1]); i++; }
234 else if(strcmp(argv[i], "-stacksize") == 0 && (i+1) < argc) { config_set("global", "pthread stack size", argv[i+1]); i++; }
235 else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) dont_fork = 1;
236 else if(strcmp(argv[i], "-pidfile") == 0 && (i+1) < argc) {
238 strncpy(pidfile, argv[i], FILENAME_MAX);
239 pidfile[FILENAME_MAX] = '\0';
241 else if(strcmp(argv[i], "--unittest") == 0) {
242 rrd_update_every = 1;
243 if(run_all_mockup_tests()) exit(1);
244 if(unit_test_storage()) exit(1);
245 fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
249 fprintf(stderr, "Cannot understand option '%s'.\n", argv[i]);
250 fprintf(stderr, "\nUSAGE: %s [-d] [-l LINES_TO_SAVE] [-u UPDATE_TIMER] [-p LISTEN_PORT] [-df debug flags].\n\n", argv[0]);
251 fprintf(stderr, " -c CONFIG FILE the configuration file to load. Default: %s.\n", CONFIG_DIR "/" CONFIG_FILENAME);
252 fprintf(stderr, " -l LINES_TO_SAVE can be from 5 to %d lines in JSON data. Default: %d.\n", RRD_HISTORY_ENTRIES_MAX, RRD_DEFAULT_HISTORY_ENTRIES);
253 fprintf(stderr, " -t UPDATE_TIMER can be from 1 to %d seconds. Default: %d.\n", UPDATE_EVERY_MAX, UPDATE_EVERY);
254 fprintf(stderr, " -p LISTEN_PORT can be from 1 to %d. Default: %d.\n", 65535, LISTEN_PORT);
255 fprintf(stderr, " -u USERNAME can be any system username to run as. Default: none.\n");
256 fprintf(stderr, " -ch path to access host /proc and /sys when running in a container. Default: empty.\n");
257 fprintf(stderr, " -nd or -nodeamon to disable forking in the background. Default: unset.\n");
258 fprintf(stderr, " -df FLAGS debug options. Default: 0x%08llx.\n", debug_flags);
259 fprintf(stderr, " -stacksize BYTES to overwrite the pthread stack size.\n");
260 fprintf(stderr, " -pidfile FILENAME to save a pid while running.\n");
265 if(!config_loaded) load_config(NULL, 0);
267 // prepare configuration environment variables for the plugins
268 setenv("NETDATA_CONFIG_DIR" , config_get("global", "config directory" , CONFIG_DIR) , 1);
269 setenv("NETDATA_PLUGINS_DIR", config_get("global", "plugins directory" , PLUGINS_DIR), 1);
270 setenv("NETDATA_WEB_DIR" , config_get("global", "web files directory", WEB_DIR) , 1);
271 setenv("NETDATA_CACHE_DIR" , config_get("global", "cache directory" , CACHE_DIR) , 1);
272 setenv("NETDATA_LOG_DIR" , config_get("global", "log directory" , LOG_DIR) , 1);
273 setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
275 // avoid extended to stat(/etc/localtime)
276 // http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
277 setenv("TZ", ":/etc/localtime", 0);
279 // cd to /tmp to avoid any plugins writing files at random places
280 if(chdir("/tmp")) error("netdata: ERROR: Cannot cd to /tmp");
282 char *input_log_file = NULL;
283 char *output_log_file = NULL;
284 char *error_log_file = NULL;
285 char *access_log_file = NULL;
290 // --------------------------------------------------------------------
292 sprintf(buffer, "0x%08llx", 0ULL);
293 char *flags = config_get("global", "debug flags", buffer);
294 setenv("NETDATA_DEBUG_FLAGS", flags, 1);
296 debug_flags = strtoull(flags, NULL, 0);
297 debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
299 if(debug_flags != 0) {
300 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
301 if(setrlimit(RLIMIT_CORE, &rl) != 0)
302 info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
303 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
306 // --------------------------------------------------------------------
308 #ifdef MADV_MERGEABLE
309 enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
311 #warning "Kernel memory deduplication (KSM) is not available"
314 // --------------------------------------------------------------------
317 global_host_prefix = config_get("global", "host access prefix", "");
318 setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
320 // --------------------------------------------------------------------
322 output_log_file = config_get("global", "debug log", LOG_DIR "/debug.log");
323 if(strcmp(output_log_file, "syslog") == 0) {
324 output_log_syslog = 1;
325 output_log_file = NULL;
327 else if(strcmp(output_log_file, "none") == 0) {
328 output_log_syslog = 0;
329 output_log_file = NULL;
331 else output_log_syslog = 0;
333 // --------------------------------------------------------------------
335 error_log_file = config_get("global", "error log", LOG_DIR "/error.log");
336 if(strcmp(error_log_file, "syslog") == 0) {
337 error_log_syslog = 1;
338 error_log_file = NULL;
340 else if(strcmp(error_log_file, "none") == 0) {
341 error_log_syslog = 0;
342 error_log_file = NULL;
343 // optimization - do not even generate debug log entries
345 else error_log_syslog = 0;
347 // --------------------------------------------------------------------
349 access_log_file = config_get("global", "access log", LOG_DIR "/access.log");
350 if(strcmp(access_log_file, "syslog") == 0) {
351 access_log_syslog = 1;
352 access_log_file = NULL;
354 else if(strcmp(access_log_file, "none") == 0) {
355 access_log_syslog = 0;
356 access_log_file = NULL;
358 else access_log_syslog = 0;
360 // --------------------------------------------------------------------
362 rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
364 // --------------------------------------------------------------------
366 if(gethostname(buffer, HOSTNAME_MAX) == -1)
367 error("WARNING: Cannot get machine hostname.");
368 hostname = config_get("global", "hostname", buffer);
369 debug(D_OPTIONS, "hostname set to '%s'", hostname);
371 // --------------------------------------------------------------------
373 rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
374 if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
375 info("Invalid save lines %d given. Defaulting to %d.", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
376 rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
379 debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
382 // --------------------------------------------------------------------
384 rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
385 if(rrd_update_every < 1 || rrd_update_every > 600) {
386 info("Invalid update timer %d given. Defaulting to %d.", rrd_update_every, UPDATE_EVERY_MAX);
387 rrd_update_every = UPDATE_EVERY;
389 else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
391 // let the plugins know the min update_every
394 snprintf(buf, 50, "%d", rrd_update_every);
395 setenv("NETDATA_UPDATE_EVERY", buf, 1);
398 // --------------------------------------------------------------------
400 i = pthread_attr_init(&attr);
402 fatal("pthread_attr_init() failed with code %d.", i);
404 i = pthread_attr_getstacksize(&attr, &stacksize);
406 fatal("pthread_attr_getstacksize() failed with code %d.", i);
408 debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
410 wanted_stacksize = config_get_number("global", "pthread stack size", stacksize);
412 // --------------------------------------------------------------------
414 for (i = 0; static_threads[i].name != NULL ; i++) {
415 struct netdata_static_thread *st = &static_threads[i];
417 if(st->config_name) st->enabled = config_get_boolean(st->config_section, st->config_name, st->enabled);
418 if(st->enabled && st->init_routine) st->init_routine();
421 // --------------------------------------------------------------------
423 user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
426 // --------------------------------------------------------------------
428 listen_backlog = (int) config_get_number("global", "http port listen backlog", LISTEN_BACKLOG);
430 listen_port = (int) config_get_number("global", "port", LISTEN_PORT);
431 if(listen_port < 1 || listen_port > 65535) {
432 info("Invalid listen port %d given. Defaulting to %d.", listen_port, LISTEN_PORT);
433 listen_port = LISTEN_PORT;
435 else debug(D_OPTIONS, "Listen port set to %d.", listen_port);
438 char *ipv = config_get("global", "ip version", "any");
439 if(!strcmp(ipv, "any") || !strcmp(ipv, "both") || !strcmp(ipv, "all")) ip = 0;
440 else if(!strcmp(ipv, "ipv4") || !strcmp(ipv, "IPV4") || !strcmp(ipv, "IPv4") || !strcmp(ipv, "4")) ip = 4;
441 else if(!strcmp(ipv, "ipv6") || !strcmp(ipv, "IPV6") || !strcmp(ipv, "IPv6") || !strcmp(ipv, "6")) ip = 6;
442 else info("Cannot understand ip version '%s'. Assuming 'any'.", ipv);
444 if(ip == 0 || ip == 6) listen_fd = create_listen_socket6(config_get("global", "bind socket to IP", "*"), listen_port, listen_backlog);
446 listen_fd = create_listen_socket4(config_get("global", "bind socket to IP", "*"), listen_port, listen_backlog);
447 if(listen_fd >= 0 && ip != 4) info("Managed to open an IPv4 socket on port %d.", listen_port);
450 if(listen_fd < 0) fatal("Cannot listen socket.");
453 // never become a problem
454 if(nice(20) == -1) error("Cannot lower my CPU priority.");
456 if(become_daemon(dont_fork, 0, user, input_log_file, output_log_file, error_log_file, access_log_file, &access_fd, &stdaccess) == -1) {
457 fatal("Cannot demonize myself.");
461 if(debug_flags != 0) {
462 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
463 if(setrlimit(RLIMIT_CORE, &rl) != 0)
464 info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
466 prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
469 if(output_log_syslog || error_log_syslog || access_log_syslog)
470 openlog("netdata", LOG_PID, LOG_DAEMON);
472 info("NetData started on pid %d", getpid());
476 for (i = 1 ; i < 65 ;i++) {
478 case SIGKILL: // not catchable
479 case SIGSTOP: // not catchable
489 signal(i, sig_handler);
494 // ------------------------------------------------------------------------
495 // get default pthread stack size
497 if(stacksize < wanted_stacksize) {
498 i = pthread_attr_setstacksize(&attr, wanted_stacksize);
500 fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
502 info("Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
505 // ------------------------------------------------------------------------
508 for (i = 0; static_threads[i].name != NULL ; i++) {
509 struct netdata_static_thread *st = &static_threads[i];
512 st->thread = malloc(sizeof(pthread_t));
514 fatal("Cannot allocate pthread_t memory");
516 info("Starting thread %s.", st->name);
518 if(pthread_create(st->thread, &attr, st->start_routine, NULL))
519 error("failed to create new thread for %s.", st->name);
521 else if(pthread_detach(*st->thread))
522 error("Cannot request detach of newly created %s thread.", st->name);
524 else info("Not starting thread %s.", st->name);
527 // for future use - the main thread
529 if(netdata_exit != 0) {
532 if(netdata_exit > 5) {
533 netdata_cleanup_and_exit(0);