12 #include <sys/types.h>
15 #include <sys/resource.h>
21 #include "web_server.h"
23 #include "appconfig.h"
24 #include "web_client.h"
28 #include "unit_test.h"
30 #include "plugins_d.h"
31 #include "plugin_idlejitter.h"
32 #include "plugin_tc.h"
33 #include "plugin_checks.h"
34 #include "plugin_proc.h"
35 #include "plugin_nfacct.h"
41 void netdata_cleanup_and_exit(int ret)
45 //unlink("/var/run/netdata.pid");
46 info("NetData exiting. Bye bye...");
50 struct netdata_static_thread {
60 void (*init_routine) (void);
61 void *(*start_routine) (void *);
64 struct netdata_static_thread static_threads[] = {
65 {"tc", "plugins", "tc", 1, NULL, NULL, tc_main},
66 {"idlejitter", "plugins", "idlejitter", 1, NULL, NULL, cpuidlejitter_main},
67 {"proc", "plugins", "proc", 1, NULL, NULL, proc_main},
69 #ifdef INTERNAL_PLUGIN_NFACCT
70 // nfacct requires root access
71 // so, we build it as an external plugin with setuid to root
72 {"nfacct", "plugins", "nfacct", 1, NULL, NULL, nfacct_main},
75 {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main},
76 {"check", "plugins", "checks", 0, NULL, NULL, checks_main},
77 {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main},
78 {NULL, NULL, NULL, 0, NULL, NULL, NULL}
81 int killpid(pid_t pid, int sig)
84 debug(D_EXIT, "Request to kill pid %d", pid);
87 if(kill(pid, 0) == -1) {
90 error("Request to kill pid %d, but it is not running.", pid);
94 error("Request to kill pid %d, but I do not have enough permissions.", pid);
98 error("Request to kill pid %d, but I received an error.", pid);
106 old = signal(sig, SIG_IGN);
108 error("Cannot overwrite signal handler for signal %d", sig);
112 ret = kill(pid, sig);
114 if(signal(sig, old) == SIG_ERR)
115 error("Cannot restore signal handler for signal %d", sig);
120 error("Cannot kill pid %d, but it is not running.", pid);
124 error("Cannot kill pid %d, but I do not have enough permissions.", pid);
128 error("Cannot kill pid %d, but I received an error.", pid);
141 struct web_client *w;
142 for(w = web_clients; w ; w = w->next) {
143 debug(D_EXIT, "Stopping web client %s", w->client_ip);
144 pthread_cancel(w->thread);
145 pthread_join(w->thread, NULL);
149 for (i = 0; static_threads[i].name != NULL ; i++) {
150 if(static_threads[i].thread) {
151 debug(D_EXIT, "Stopping %s thread", static_threads[i].name);
152 pthread_cancel(*static_threads[i].thread);
153 pthread_join(*static_threads[i].thread, NULL);
154 static_threads[i].thread = NULL;
159 info("Killing tc-qos-helper procees");
160 if(killpid(tc_child_pid, SIGTERM) != -1)
161 waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
166 for(cd = pluginsd_root ; cd ; cd = cd->next) {
167 debug(D_EXIT, "Stopping %s plugin thread", cd->id);
168 pthread_cancel(cd->thread);
169 pthread_join(cd->thread, NULL);
171 if(cd->pid && !cd->obsolete) {
172 debug(D_EXIT, "killing %s plugin process", cd->id);
173 if(killpid(cd->pid, SIGTERM) != -1)
174 waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
178 // if, for any reason there is any child exited
180 waitid(P_PID, 0, &info, WEXITED|WNOHANG);
182 debug(D_EXIT, "All threads/childs stopped.");
186 int main(int argc, char **argv)
189 int config_loaded = 0;
192 // global initialization
195 // set the name for logging
196 program_name = "netdata";
198 // parse the arguments
199 for(i = 1; i < argc ; i++) {
200 if(strcmp(argv[i], "-c") == 0 && (i+1) < argc) {
201 if(load_config(argv[i+1], 1) != 1) {
202 error("Cannot load configuration file %s.", argv[i+1]);
206 debug(D_OPTIONS, "Configuration loaded from %s.", argv[i+1]);
211 else if(strcmp(argv[i], "-df") == 0 && (i+1) < argc) { config_set("global", "debug flags", argv[i+1]); i++; }
212 else if(strcmp(argv[i], "-p") == 0 && (i+1) < argc) { config_set("global", "port", argv[i+1]); i++; }
213 else if(strcmp(argv[i], "-u") == 0 && (i+1) < argc) { config_set("global", "run as user", argv[i+1]); i++; }
214 else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) { config_set("global", "history", argv[i+1]); i++; }
215 else if(strcmp(argv[i], "-t") == 0 && (i+1) < argc) { config_set("global", "update every", argv[i+1]); i++; }
216 else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) { config_set("global", "host access prefix", argv[i+1]); i++; }
217 else if(strcmp(argv[i], "-nodeamon") == 0 || strcmp(argv[i], "-nd") == 0) dont_fork = 1;
218 else if(strcmp(argv[i], "--unittest") == 0) {
219 if(unit_test_storage()) exit(1);
221 rrd_update_every = 1;
222 if(unit_test(1000000, 0)) exit(1);
223 if(unit_test(1000000, 500000)) exit(1);
224 if(unit_test(1000000, 100000)) exit(1);
225 if(unit_test(1000000, 900000)) exit(1);
226 if(unit_test(2000000, 0)) exit(1);
227 if(unit_test(2000000, 500000)) exit(1);
228 if(unit_test(2000000, 100000)) exit(1);
229 if(unit_test(2000000, 900000)) exit(1);
230 if(unit_test(500000, 500000)) exit(1);
231 //if(unit_test(500000, 100000)) exit(1); // FIXME: the expected numbers are wrong
232 //if(unit_test(500000, 900000)) exit(1); // FIXME: the expected numbers are wrong
233 if(unit_test(500000, 0)) exit(1);
234 fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
238 fprintf(stderr, "Cannot understand option '%s'.\n", argv[i]);
239 fprintf(stderr, "\nUSAGE: %s [-d] [-l LINES_TO_SAVE] [-u UPDATE_TIMER] [-p LISTEN_PORT] [-dl debug log file] [-df debug flags].\n\n", argv[0]);
240 fprintf(stderr, " -c CONFIG FILE the configuration file to load. Default: %s.\n", CONFIG_DIR "/" CONFIG_FILENAME);
241 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);
242 fprintf(stderr, " -t UPDATE_TIMER can be from 1 to %d seconds. Default: %d.\n", UPDATE_EVERY_MAX, UPDATE_EVERY);
243 fprintf(stderr, " -p LISTEN_PORT can be from 1 to %d. Default: %d.\n", 65535, LISTEN_PORT);
244 fprintf(stderr, " -u USERNAME can be any system username to run as. Default: none.\n");
245 fprintf(stderr, " -ch path to access host /proc and /sys when running in a container. Default: empty.\n");
246 fprintf(stderr, " -nd or -nodeamon to disable forking in the background. Default: unset.\n");
247 fprintf(stderr, " -df FLAGS debug options. Default: 0x%08llx.\n", debug_flags);
252 if(!config_loaded) load_config(NULL, 0);
254 // prepare configuration environment variables for the plugins
255 setenv("NETDATA_CONFIG_DIR" , config_get("global", "config directory" , CONFIG_DIR) , 1);
256 setenv("NETDATA_PLUGINS_DIR", config_get("global", "plugins directory" , PLUGINS_DIR), 1);
257 setenv("NETDATA_WEB_DIR" , config_get("global", "web files directory", WEB_DIR) , 1);
258 setenv("NETDATA_CACHE_DIR" , config_get("global", "cache directory" , CACHE_DIR) , 1);
259 setenv("NETDATA_LOG_DIR" , config_get("global", "log directory" , LOG_DIR) , 1);
261 // avoid extended to stat(/etc/localtime)
262 // http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
263 setenv("TZ", ":/etc/localtime", 0);
265 // cd to /tmp to avoid any plugins writing files at random places
266 if(chdir("/tmp")) error("netdata: ERROR: Cannot cd to /tmp");
268 char *input_log_file = NULL;
269 char *output_log_file = NULL;
270 char *error_log_file = NULL;
271 char *access_log_file = NULL;
276 // --------------------------------------------------------------------
278 sprintf(buffer, "0x%08llx", 0ULL);
279 char *flags = config_get("global", "debug flags", buffer);
280 setenv("NETDATA_DEBUG_FLAGS", flags, 1);
282 debug_flags = strtoull(flags, NULL, 0);
283 debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
285 if(debug_flags != 0) {
286 struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
287 if(setrlimit(RLIMIT_CORE, &rl) != 0)
288 info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
291 // --------------------------------------------------------------------
293 #ifdef MADV_MERGEABLE
294 enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
296 #warning "Kernel memory deduplication (KSM) is not available"
299 // --------------------------------------------------------------------
302 global_host_prefix = config_get("global", "host access prefix", "");
303 setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
305 // --------------------------------------------------------------------
307 output_log_file = config_get("global", "debug log", LOG_DIR "/debug.log");
308 if(strcmp(output_log_file, "syslog") == 0) {
309 output_log_syslog = 1;
310 output_log_file = NULL;
312 else if(strcmp(output_log_file, "none") == 0) {
313 output_log_syslog = 0;
314 output_log_file = NULL;
316 else output_log_syslog = 0;
318 // --------------------------------------------------------------------
320 error_log_file = config_get("global", "error log", LOG_DIR "/error.log");
321 if(strcmp(error_log_file, "syslog") == 0) {
322 error_log_syslog = 1;
323 error_log_file = NULL;
325 else if(strcmp(error_log_file, "none") == 0) {
326 error_log_syslog = 0;
327 error_log_file = NULL;
328 // optimization - do not even generate debug log entries
330 else error_log_syslog = 0;
332 // --------------------------------------------------------------------
334 access_log_file = config_get("global", "access log", LOG_DIR "/access.log");
335 if(strcmp(access_log_file, "syslog") == 0) {
336 access_log_syslog = 1;
337 access_log_file = NULL;
339 else if(strcmp(access_log_file, "none") == 0) {
340 access_log_syslog = 0;
341 access_log_file = NULL;
343 else access_log_syslog = 0;
345 // --------------------------------------------------------------------
347 rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
349 // --------------------------------------------------------------------
351 if(gethostname(buffer, HOSTNAME_MAX) == -1)
352 error("WARNING: Cannot get machine hostname.");
353 hostname = config_get("global", "hostname", buffer);
354 debug(D_OPTIONS, "hostname set to '%s'", hostname);
356 // --------------------------------------------------------------------
358 rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
359 if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
360 fprintf(stderr, "Invalid save lines %d given. Defaulting to %d.\n", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
361 rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
364 debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
367 // --------------------------------------------------------------------
369 rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
370 if(rrd_update_every < 1 || rrd_update_every > 600) {
371 fprintf(stderr, "Invalid update timer %d given. Defaulting to %d.\n", rrd_update_every, UPDATE_EVERY_MAX);
372 rrd_update_every = UPDATE_EVERY;
374 else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
376 // let the plugins know the min update_every
379 snprintf(buf, 50, "%d", rrd_update_every);
380 setenv("NETDATA_UPDATE_EVERY", buf, 1);
383 // --------------------------------------------------------------------
385 for (i = 0; static_threads[i].name != NULL ; i++) {
386 struct netdata_static_thread *st = &static_threads[i];
388 if(st->config_name) st->enabled = config_get_boolean(st->config_section, st->config_name, st->enabled);
389 if(st->enabled && st->init_routine) st->init_routine();
392 // --------------------------------------------------------------------
395 user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
398 // --------------------------------------------------------------------
400 listen_backlog = (int) config_get_number("global", "http port listen backlog", LISTEN_BACKLOG);
402 listen_port = (int) config_get_number("global", "port", LISTEN_PORT);
403 if(listen_port < 1 || listen_port > 65535) {
404 fprintf(stderr, "Invalid listen port %d given. Defaulting to %d.\n", listen_port, LISTEN_PORT);
405 listen_port = LISTEN_PORT;
407 else debug(D_OPTIONS, "Listen port set to %d.", listen_port);
410 char *ipv = config_get("global", "ip version", "any");
411 if(!strcmp(ipv, "any") || !strcmp(ipv, "both") || !strcmp(ipv, "all")) ip = 0;
412 else if(!strcmp(ipv, "ipv4") || !strcmp(ipv, "IPV4") || !strcmp(ipv, "IPv4") || !strcmp(ipv, "4")) ip = 4;
413 else if(!strcmp(ipv, "ipv6") || !strcmp(ipv, "IPV6") || !strcmp(ipv, "IPv6") || !strcmp(ipv, "6")) ip = 6;
414 else fprintf(stderr, "Cannot understand ip version '%s'. Assumming 'any'.", ipv);
416 if(ip == 0 || ip == 6) listen_fd = create_listen_socket6(listen_port, listen_backlog);
418 listen_fd = create_listen_socket4(listen_port, listen_backlog);
419 if(listen_fd >= 0 && ip != 4) fprintf(stderr, "Managed to open an IPv4 socket on port %d.", listen_port);
422 if(listen_fd < 0) fatal("Cannot listen socket.");
425 // never become a problem
426 if(nice(20) == -1) error("Cannot lower my CPU priority.");
428 if(become_daemon(dont_fork, 0, user, input_log_file, output_log_file, error_log_file, access_log_file, &access_fd, &stdaccess) == -1) {
429 fatal("Cannot demonize myself.");
433 if(output_log_syslog || error_log_syslog || access_log_syslog)
434 openlog("netdata", LOG_PID, LOG_DAEMON);
436 info("NetData started on pid %d", getpid());
440 for (i = 1 ; i < 65 ;i++) {
442 case SIGKILL: // not catchable
443 case SIGSTOP: // not catchable
453 signal(i, sig_handler);
458 for (i = 0; static_threads[i].name != NULL ; i++) {
459 struct netdata_static_thread *st = &static_threads[i];
462 st->thread = malloc(sizeof(pthread_t));
464 info("Starting thread %s.", st->name);
466 if(pthread_create(st->thread, NULL, st->start_routine, NULL))
467 error("failed to create new thread for %s.", st->name);
469 else if(pthread_detach(*st->thread))
470 error("Cannot request detach of newly created %s thread.", st->name);
472 else info("Not starting thread %s.", st->name);
475 // for future use - the main thread
477 if(netdata_exit != 0) {
480 if(netdata_exit > 5) {
481 netdata_cleanup_and_exit(0);