#include "common.h" extern void *cgroups_main(void *ptr); void netdata_cleanup_and_exit(int ret) { netdata_exit = 1; error_log_limit_unlimited(); debug(D_EXIT, "Called: netdata_cleanup_and_exit()"); // cleanup the database rrdhost_cleanup_all(); // unlink the pid if(pidfile[0]) { if(unlink(pidfile) != 0) error("Cannot unlink pidfile '%s'.", pidfile); } #ifdef NETDATA_INTERNAL_CHECKS // kill all childs //kill_childs(); // free database sleep(2); rrdhost_free_all(); #endif info("netdata exiting. Bye bye..."); exit(ret); } struct netdata_static_thread static_threads[] = { #ifdef INTERNAL_PLUGIN_NFACCT // nfacct requires root access // so, we build it as an external plugin with setuid to root {"nfacct", CONFIG_SECTION_PLUGINS, "nfacct", 1, NULL, NULL, nfacct_main}, #endif {"tc", CONFIG_SECTION_PLUGINS, "tc", 1, NULL, NULL, tc_main}, {"idlejitter", CONFIG_SECTION_PLUGINS, "idlejitter", 1, NULL, NULL, cpuidlejitter_main}, #if defined(__FreeBSD__) {"freebsd", CONFIG_SECTION_PLUGINS, "freebsd", 1, NULL, NULL, freebsd_main}, #elif defined(__APPLE__) {"macos", CONFIG_SECTION_PLUGINS, "macos", 1, NULL, NULL, macos_main}, #else {"proc", CONFIG_SECTION_PLUGINS, "proc", 1, NULL, NULL, proc_main}, {"diskspace", CONFIG_SECTION_PLUGINS, "diskspace", 1, NULL, NULL, proc_diskspace_main}, {"cgroups", CONFIG_SECTION_PLUGINS, "cgroups", 1, NULL, NULL, cgroups_main}, #endif /* __FreeBSD__, __APPLE__*/ {"check", CONFIG_SECTION_PLUGINS, "checks", 0, NULL, NULL, checks_main}, {"backends", NULL, NULL, 1, NULL, NULL, backends_main}, {"health", NULL, NULL, 1, NULL, NULL, health_main}, {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main}, {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main_multi_threaded}, {"web-single-threaded", NULL, NULL, 0, NULL, NULL, socket_listen_main_single_threaded}, {"push-metrics", NULL, NULL, 0, NULL, NULL, rrdpush_sender_thread}, {"statsd", NULL, NULL, 1, NULL, NULL, statsd_main}, {NULL, NULL, NULL, 0, NULL, NULL, NULL} }; void web_server_threading_selection(void) { web_server_mode = web_server_mode_id(config_get(CONFIG_SECTION_WEB, "mode", web_server_mode_name(web_server_mode))); int multi_threaded = (web_server_mode == WEB_SERVER_MODE_MULTI_THREADED); int single_threaded = (web_server_mode == WEB_SERVER_MODE_SINGLE_THREADED); int i; for (i = 0; static_threads[i].name; i++) { if (static_threads[i].start_routine == socket_listen_main_multi_threaded) static_threads[i].enabled = multi_threaded; if (static_threads[i].start_routine == socket_listen_main_single_threaded) static_threads[i].enabled = single_threaded; } } void web_server_config_options(void) { web_client_timeout = (int) config_get_number(CONFIG_SECTION_WEB, "disconnect idle clients after seconds", DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS); respect_web_browser_do_not_track_policy = config_get_boolean(CONFIG_SECTION_WEB, "respect do not track policy", respect_web_browser_do_not_track_policy); web_x_frame_options = config_get(CONFIG_SECTION_WEB, "x-frame-options response header", ""); if(!*web_x_frame_options) web_x_frame_options = NULL; #ifdef NETDATA_WITH_ZLIB web_enable_gzip = config_get_boolean(CONFIG_SECTION_WEB, "enable gzip compression", web_enable_gzip); char *s = config_get(CONFIG_SECTION_WEB, "gzip compression strategy", "default"); if(!strcmp(s, "default")) web_gzip_strategy = Z_DEFAULT_STRATEGY; else if(!strcmp(s, "filtered")) web_gzip_strategy = Z_FILTERED; else if(!strcmp(s, "huffman only")) web_gzip_strategy = Z_HUFFMAN_ONLY; else if(!strcmp(s, "rle")) web_gzip_strategy = Z_RLE; else if(!strcmp(s, "fixed")) web_gzip_strategy = Z_FIXED; else { error("Invalid compression strategy '%s'. Valid strategies are 'default', 'filtered', 'huffman only', 'rle' and 'fixed'. Proceeding with 'default'.", s); web_gzip_strategy = Z_DEFAULT_STRATEGY; } web_gzip_level = (int)config_get_number(CONFIG_SECTION_WEB, "gzip compression level", 3); if(web_gzip_level < 1) { error("Invalid compression level %d. Valid levels are 1 (fastest) to 9 (best ratio). Proceeding with level 1 (fastest compression).", web_gzip_level); web_gzip_level = 1; } else if(web_gzip_level > 9) { error("Invalid compression level %d. Valid levels are 1 (fastest) to 9 (best ratio). Proceeding with level 9 (best compression).", web_gzip_level); web_gzip_level = 9; } #endif /* NETDATA_WITH_ZLIB */ } int killpid(pid_t pid, int sig) { int ret = -1; debug(D_EXIT, "Request to kill pid %d", pid); errno = 0; if(kill(pid, 0) == -1) { switch(errno) { case ESRCH: error("Request to kill pid %d, but it is not running.", pid); break; case EPERM: error("Request to kill pid %d, but I do not have enough permissions.", pid); break; default: error("Request to kill pid %d, but I received an error.", pid); break; } } else { errno = 0; ret = kill(pid, sig); if(ret == -1) { switch(errno) { case ESRCH: error("Cannot kill pid %d, but it is not running.", pid); break; case EPERM: error("Cannot kill pid %d, but I do not have enough permissions.", pid); break; default: error("Cannot kill pid %d, but I received an error.", pid); break; } } } return ret; } void kill_childs() { error_log_limit_unlimited(); siginfo_t info; struct web_client *w; for(w = web_clients; w ; w = w->next) { info("Stopping web client %s", w->client_ip); pthread_cancel(w->thread); // it is detached // pthread_join(w->thread, NULL); w->obsolete = 1; } int i; for (i = 0; static_threads[i].name != NULL ; i++) { if(static_threads[i].enabled) { info("Stopping %s thread", static_threads[i].name); pthread_cancel(*static_threads[i].thread); // it is detached // pthread_join(*static_threads[i].thread, NULL); static_threads[i].enabled = 0; } } if(tc_child_pid) { info("Killing tc-qos-helper process %d", tc_child_pid); if(killpid(tc_child_pid, SIGTERM) != -1) waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED); tc_child_pid = 0; } struct plugind *cd; for(cd = pluginsd_root ; cd ; cd = cd->next) { if(cd->enabled && !cd->obsolete) { info("Stopping %s plugin thread", cd->id); pthread_cancel(cd->thread); if(cd->pid) { info("killing %s plugin child process pid %d", cd->id, cd->pid); if(killpid(cd->pid, SIGTERM) != -1) waitid(P_PID, (id_t) cd->pid, &info, WEXITED); cd->pid = 0; } cd->obsolete = 1; } } // if, for any reason there is any child exited // catch it here info("Cleaning up an other children"); waitid(P_PID, 0, &info, WEXITED|WNOHANG); info("All threads/childs stopped."); } struct option_def options[] = { // opt description arg name default value { 'c', "Configuration file to load.", "filename", CONFIG_DIR "/" CONFIG_FILENAME}, { 'D', "Do not fork. Run in the foreground.", NULL, "run in the background"}, { 'h', "Display this help message.", NULL, NULL}, { 'P', "File to save a pid while running.", "filename", "do not save pid to a file"}, { 'i', "The IP address to listen to.", "IP", "all IP addresses IPv4 and IPv6"}, { 'p', "API/Web port to use.", "port", "19999"}, { 's', "Prefix for /proc and /sys (for containers).", "path", "no prefix"}, { 't', "The internal clock of netdata.", "seconds", "1"}, { 'u', "Run as user.", "username", "netdata"}, { 'v', "Print netdata version and exit.", NULL, NULL}, { 'V', "Print netdata version and exit.", NULL, NULL}, { 'W', "See Advanced options below.", "options", NULL}, }; void help(int exitcode) { FILE *stream; if(exitcode == 0) stream = stdout; else stream = stderr; int num_opts = sizeof(options) / sizeof(struct option_def); int i; int max_len_arg = 0; // Compute maximum argument length for( i = 0; i < num_opts; i++ ) { if(options[i].arg_name) { int len_arg = (int)strlen(options[i].arg_name); if(len_arg > max_len_arg) max_len_arg = len_arg; } } if(max_len_arg > 30) max_len_arg = 30; if(max_len_arg < 20) max_len_arg = 20; fprintf(stream, "%s", "\n" " ^\n" " |.-. .-. .-. .-. . netdata \n" " | '-' '-' '-' '-' real-time performance monitoring, done right! \n" " +----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--->\n" "\n" " Copyright (C) 2016-2017, Costa Tsaousis \n" " Released under GNU General Public License v3 or later.\n" " All rights reserved.\n" "\n" " Home Page : https://my-netdata.io\n" " Source Code: https://github.com/firehol/netdata\n" " Wiki / Docs: https://github.com/firehol/netdata/wiki\n" " Support : https://github.com/firehol/netdata/issues\n" " License : https://github.com/firehol/netdata/blob/master/LICENSE.md\n" "\n" " Twitter : https://twitter.com/linuxnetdata\n" " Facebook : https://www.facebook.com/linuxnetdata/\n" "\n" " netdata is a https://firehol.org project.\n" "\n" "\n" ); fprintf(stream, " SYNOPSIS: netdata [options]\n"); fprintf(stream, "\n"); fprintf(stream, " Options:\n\n"); // Output options description. for( i = 0; i < num_opts; i++ ) { fprintf(stream, " -%c %-*s %s", options[i].val, max_len_arg, options[i].arg_name ? options[i].arg_name : "", options[i].description); if(options[i].default_value) { fprintf(stream, "\n %c %-*s Default: %s\n", ' ', max_len_arg, "", options[i].default_value); } else { fprintf(stream, "\n"); } fprintf(stream, "\n"); } fprintf(stream, "\n Advanced options:\n\n" " -W stacksize=N Set the stacksize (in bytes).\n\n" " -W debug_flags=N Set runtime tracing to debug.log.\n\n" " -W unittest Run internal unittests and exit.\n\n" " -W set section option value\n" " set netdata.conf option from the command line.\n\n" " -W simple-pattern pattern string\n" " Check if string matches pattern and exit.\n\n" ); fprintf(stream, "\n Signals netdata handles:\n\n" " - HUP Close and reopen log files.\n" " - USR1 Save internal DB to disk.\n" " - USR2 Reload health configuration.\n" "\n" ); fflush(stream); exit(exitcode); } // TODO: Remove this function with the nix major release. void remove_option(int opt_index, int *argc, char **argv) { int i = opt_index; // remove the options. do { *argc = *argc - 1; for(i = opt_index; i < *argc; i++) { argv[i] = argv[i+1]; } i = opt_index; } while(argv[i][0] != '-' && opt_index >= *argc); } static const char *verify_required_directory(const char *dir) { if(chdir(dir) == -1) fatal("Cannot cd to directory '%s'", dir); DIR *d = opendir(dir); if(!d) fatal("Cannot examine the contents of directory '%s'", dir); closedir(d); return dir; } void log_init(void) { char filename[FILENAME_MAX + 1]; snprintfz(filename, FILENAME_MAX, "%s/debug.log", netdata_configured_log_dir); stdout_filename = config_get(CONFIG_SECTION_GLOBAL, "debug log", filename); snprintfz(filename, FILENAME_MAX, "%s/error.log", netdata_configured_log_dir); stderr_filename = config_get(CONFIG_SECTION_GLOBAL, "error log", filename); snprintfz(filename, FILENAME_MAX, "%s/access.log", netdata_configured_log_dir); stdaccess_filename = config_get(CONFIG_SECTION_GLOBAL, "access log", filename); error_log_throttle_period_backup = error_log_throttle_period = config_get_number(CONFIG_SECTION_GLOBAL, "errors flood protection period", error_log_throttle_period); error_log_errors_per_period = (unsigned long)config_get_number(CONFIG_SECTION_GLOBAL, "errors to trigger flood protection", (long long int)error_log_errors_per_period); setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get(CONFIG_SECTION_GLOBAL, "errors flood protection period" , ""), 1); setenv("NETDATA_ERRORS_PER_PERIOD", config_get(CONFIG_SECTION_GLOBAL, "errors to trigger flood protection", ""), 1); } static void backwards_compatible_config() { // allow existing configurations to work with the current version of netdata if(config_exists(CONFIG_SECTION_GLOBAL, "multi threaded web server")) { int mode = config_get_boolean(CONFIG_SECTION_GLOBAL, "multi threaded web server", 1); web_server_mode = (mode)?WEB_SERVER_MODE_MULTI_THREADED:WEB_SERVER_MODE_SINGLE_THREADED; } // move [global] options to the [web] section config_move(CONFIG_SECTION_GLOBAL, "http port listen backlog", CONFIG_SECTION_WEB, "listen backlog"); config_move(CONFIG_SECTION_GLOBAL, "bind socket to IP", CONFIG_SECTION_WEB, "bind to"); config_move(CONFIG_SECTION_GLOBAL, "bind to", CONFIG_SECTION_WEB, "bind to"); config_move(CONFIG_SECTION_GLOBAL, "port", CONFIG_SECTION_WEB, "default port"); config_move(CONFIG_SECTION_GLOBAL, "default port", CONFIG_SECTION_WEB, "default port"); config_move(CONFIG_SECTION_GLOBAL, "disconnect idle web clients after seconds", CONFIG_SECTION_WEB, "disconnect idle clients after seconds"); config_move(CONFIG_SECTION_GLOBAL, "respect web browser do not track policy", CONFIG_SECTION_WEB, "respect do not track policy"); config_move(CONFIG_SECTION_GLOBAL, "web x-frame-options header", CONFIG_SECTION_WEB, "x-frame-options response header"); config_move(CONFIG_SECTION_GLOBAL, "enable web responses gzip compression", CONFIG_SECTION_WEB, "enable gzip compression"); config_move(CONFIG_SECTION_GLOBAL, "web compression strategy", CONFIG_SECTION_WEB, "gzip compression strategy"); config_move(CONFIG_SECTION_GLOBAL, "web compression level", CONFIG_SECTION_WEB, "gzip compression level"); config_move(CONFIG_SECTION_GLOBAL, "web files owner", CONFIG_SECTION_WEB, "web files owner"); config_move(CONFIG_SECTION_GLOBAL, "web files group", CONFIG_SECTION_WEB, "web files group"); config_move(CONFIG_SECTION_BACKEND, "opentsdb host tags", CONFIG_SECTION_BACKEND, "host tags"); } static void get_netdata_configured_variables() { backwards_compatible_config(); // ------------------------------------------------------------------------ // get the hostname char buf[HOSTNAME_MAX + 1]; if(gethostname(buf, HOSTNAME_MAX) == -1) error("Cannot get machine hostname."); netdata_configured_hostname = config_get(CONFIG_SECTION_GLOBAL, "hostname", buf); debug(D_OPTIONS, "hostname set to '%s'", netdata_configured_hostname); // ------------------------------------------------------------------------ // get default database size default_rrd_history_entries = (int) config_get_number(CONFIG_SECTION_GLOBAL, "history", align_entries_to_pagesize(default_rrd_memory_mode, RRD_DEFAULT_HISTORY_ENTRIES)); long h = align_entries_to_pagesize(default_rrd_memory_mode, default_rrd_history_entries); if(h != default_rrd_history_entries) { config_set_number(CONFIG_SECTION_GLOBAL, "history", h); default_rrd_history_entries = (int)h; } if(default_rrd_history_entries < 5 || default_rrd_history_entries > RRD_HISTORY_ENTRIES_MAX) { error("Invalid history entries %d given. Defaulting to %d.", default_rrd_history_entries, RRD_DEFAULT_HISTORY_ENTRIES); default_rrd_history_entries = RRD_DEFAULT_HISTORY_ENTRIES; } // ------------------------------------------------------------------------ // get default database update frequency default_rrd_update_every = (int) config_get_number(CONFIG_SECTION_GLOBAL, "update every", UPDATE_EVERY); if(default_rrd_update_every < 1 || default_rrd_update_every > 600) { error("Invalid data collection frequency (update every) %d given. Defaulting to %d.", default_rrd_update_every, UPDATE_EVERY_MAX); default_rrd_update_every = UPDATE_EVERY; } // ------------------------------------------------------------------------ // let the plugins know the min update_every // get system paths netdata_configured_config_dir = config_get(CONFIG_SECTION_GLOBAL, "config directory", CONFIG_DIR); netdata_configured_log_dir = config_get(CONFIG_SECTION_GLOBAL, "log directory", LOG_DIR); netdata_configured_plugins_dir = config_get(CONFIG_SECTION_GLOBAL, "plugins directory", PLUGINS_DIR); netdata_configured_web_dir = config_get(CONFIG_SECTION_GLOBAL, "web files directory", WEB_DIR); netdata_configured_cache_dir = config_get(CONFIG_SECTION_GLOBAL, "cache directory", CACHE_DIR); netdata_configured_varlib_dir = config_get(CONFIG_SECTION_GLOBAL, "lib directory", VARLIB_DIR); netdata_configured_home_dir = config_get(CONFIG_SECTION_GLOBAL, "home directory", CACHE_DIR); // ------------------------------------------------------------------------ // get default memory mode for the database default_rrd_memory_mode = rrd_memory_mode_id(config_get(CONFIG_SECTION_GLOBAL, "memory mode", rrd_memory_mode_name(default_rrd_memory_mode))); // ------------------------------------------------------------------------ netdata_configured_host_prefix = config_get(CONFIG_SECTION_GLOBAL, "host access prefix", ""); // -------------------------------------------------------------------- // get KSM settings #ifdef MADV_MERGEABLE enable_ksm = config_get_boolean(CONFIG_SECTION_GLOBAL, "memory deduplication (ksm)", enable_ksm); #endif // -------------------------------------------------------------------- // get various system parameters get_system_HZ(); get_system_cpus(); get_system_pid_max(); } void set_global_environment() { { char b[16]; snprintfz(b, 15, "%d", default_rrd_update_every); setenv("NETDATA_UPDATE_EVERY", b, 1); } setenv("NETDATA_HOSTNAME" , netdata_configured_hostname, 1); setenv("NETDATA_CONFIG_DIR" , verify_required_directory(netdata_configured_config_dir), 1); setenv("NETDATA_PLUGINS_DIR", verify_required_directory(netdata_configured_plugins_dir), 1); setenv("NETDATA_WEB_DIR" , verify_required_directory(netdata_configured_web_dir), 1); setenv("NETDATA_CACHE_DIR" , verify_required_directory(netdata_configured_cache_dir), 1); setenv("NETDATA_LIB_DIR" , verify_required_directory(netdata_configured_varlib_dir), 1); setenv("NETDATA_LOG_DIR" , verify_required_directory(netdata_configured_log_dir), 1); setenv("HOME" , verify_required_directory(netdata_configured_home_dir), 1); setenv("NETDATA_HOST_PREFIX", netdata_configured_host_prefix, 1); // avoid flood calls to stat(/etc/localtime) // http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux const char *tz = getenv("TZ"); if(!tz || !*tz) setenv("TZ", config_get(CONFIG_SECTION_GLOBAL, "TZ environment variable", ":/etc/localtime"), 0); // set the path we need char path[1024 + 1], *p = getenv("PATH"); if(!p) p = "/bin:/usr/bin"; snprintfz(path, 1024, "%s:%s", p, "/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin"); setenv("PATH", config_get(CONFIG_SECTION_PLUGINS, "PATH environment variable", path), 1); // python options p = getenv("PYTHONPATH"); if(!p) p = ""; setenv("PYTHONPATH", config_get(CONFIG_SECTION_PLUGINS, "PYTHONPATH environment variable", p), 1); // disable buffering for python plugins setenv("PYTHONUNBUFFERED", "1", 1); // switch to standard locale for plugins setenv("LC_ALL", "C", 1); } int main(int argc, char **argv) { int i; int config_loaded = 0; int dont_fork = 0; size_t wanted_stacksize = 0, stacksize = 0; pthread_attr_t attr; // set the name for logging program_name = "netdata"; // parse depercated options // TODO: Remove this block with the next major release. { i = 1; while(i < argc) { if(strcmp(argv[i], "-pidfile") == 0 && (i+1) < argc) { strncpyz(pidfile, argv[i+1], FILENAME_MAX); fprintf(stderr, "%s: deprecated option -- %s -- please use -P instead.\n", argv[0], argv[i]); remove_option(i, &argc, argv); } else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) { dont_fork = 1; fprintf(stderr, "%s: deprecated option -- %s -- please use -D instead.\n ", argv[0], argv[i]); remove_option(i, &argc, argv); } else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) { config_set(CONFIG_SECTION_GLOBAL, "host access prefix", argv[i+1]); fprintf(stderr, "%s: deprecated option -- %s -- please use -s instead.\n", argv[0], argv[i]); remove_option(i, &argc, argv); } else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) { config_set(CONFIG_SECTION_GLOBAL, "history", argv[i+1]); fprintf(stderr, "%s: deprecated option -- %s -- This option will be removed with V2.*.\n", argv[0], argv[i]); remove_option(i, &argc, argv); } else i++; } } // parse options { int num_opts = sizeof(options) / sizeof(struct option_def); char optstring[(num_opts * 2) + 1]; int string_i = 0; for( i = 0; i < num_opts; i++ ) { optstring[string_i] = options[i].val; string_i++; if(options[i].arg_name) { optstring[string_i] = ':'; string_i++; } } // terminate optstring optstring[string_i] ='\0'; optstring[(num_opts *2)] ='\0'; int opt; while( (opt = getopt(argc, argv, optstring)) != -1 ) { switch(opt) { case 'c': if(config_load(optarg, 1) != 1) { error("Cannot load configuration file %s.", optarg); exit(1); } else { debug(D_OPTIONS, "Configuration loaded from %s.", optarg); config_loaded = 1; } break; case 'D': dont_fork = 1; break; case 'h': help(0); break; case 'i': config_set(CONFIG_SECTION_WEB, "bind to", optarg); break; case 'P': strncpy(pidfile, optarg, FILENAME_MAX); pidfile[FILENAME_MAX] = '\0'; break; case 'p': config_set(CONFIG_SECTION_GLOBAL, "default port", optarg); break; case 's': config_set(CONFIG_SECTION_GLOBAL, "host access prefix", optarg); break; case 't': config_set(CONFIG_SECTION_GLOBAL, "update every", optarg); break; case 'u': config_set(CONFIG_SECTION_GLOBAL, "run as user", optarg); break; case 'v': case 'V': printf("%s %s\n", program_name, program_version); return 0; case 'W': { char* stacksize_string = "stacksize="; char* debug_flags_string = "debug_flags="; if(strcmp(optarg, "unittest") == 0) { if(unit_test_str2ld()) exit(1); //default_rrd_update_every = 1; //default_rrd_memory_mode = RRD_MEMORY_MODE_RAM; //if(!config_loaded) config_load(NULL, 0); get_netdata_configured_variables(); default_rrd_update_every = 1; default_rrd_memory_mode = RRD_MEMORY_MODE_RAM; default_health_enabled = 0; rrd_init("unittest"); default_rrdpush_enabled = 0; if(run_all_mockup_tests()) exit(1); if(unit_test_storage()) exit(1); fprintf(stderr, "\n\nALL TESTS PASSED\n\n"); exit(0); } else if(strcmp(optarg, "simple-pattern") == 0) { if(optind + 2 > argc) { fprintf(stderr, "%s", "\nUSAGE: -W simple-pattern 'pattern' 'string'\n\n" " Checks if 'pattern' matches the given 'string'.\n" " - 'pattern' can be one or more space separated words.\n" " - each 'word' can contain one or more asterisks.\n" " - words starting with '!' give negative matches.\n" " - words are processed left to right\n" "\n" "Examples:\n" "\n" " > match all veth interfaces, except veth0:\n" "\n" " -W simple-pattern '!veth0 veth*' 'veth12'\n" "\n" "\n" " > match all *.ext files directly in /path/:\n" " (this will not match *.ext files in a subdir of /path/)\n" "\n" " -W simple-pattern '!/path/*/*.ext /path/*.ext' '/path/test.ext'\n" "\n" ); exit(1); } const char *heystack = argv[optind]; const char *needle = argv[optind + 1]; SIMPLE_PATTERN *p = simple_pattern_create(heystack , SIMPLE_PATTERN_EXACT); int ret = simple_pattern_matches(p, needle); simple_pattern_free(p); if(ret) { fprintf(stdout, "RESULT: MATCHED - pattern '%s' matches '%s'\n", heystack, needle); exit(0); } else { fprintf(stdout, "RESULT: NOT MATCHED - pattern '%s' does not match '%s'\n", heystack, needle); exit(1); } } else if(strncmp(optarg, stacksize_string, strlen(stacksize_string)) == 0) { optarg += strlen(stacksize_string); config_set(CONFIG_SECTION_GLOBAL, "pthread stack size", optarg); } else if(strncmp(optarg, debug_flags_string, strlen(debug_flags_string)) == 0) { optarg += strlen(debug_flags_string); config_set(CONFIG_SECTION_GLOBAL, "debug flags", optarg); debug_flags = strtoull(optarg, NULL, 0); } else if(strcmp(optarg, "set") == 0) { if(optind + 3 > argc) { fprintf(stderr, "%s", "\nUSAGE: -W set 'section' 'key' 'value'\n\n" " Overwrites settings of netdata.conf.\n" "\n" " These options interact with: -c netdata.conf\n" " If -c netdata.conf is given on the command line,\n" " before -W set... the user may overwrite command\n" " line parameters at netdata.conf\n" " If -c netdata.conf is given after (or missing)\n" " -W set... the user cannot overwrite the command line\n" " parameters." "\n" ); exit(1); } const char *section = argv[optind]; const char *key = argv[optind + 1]; const char *value = argv[optind + 2]; optind += 3; // set this one as the default // only if it is not already set in the config file // so the caller can use -c netdata.conf before or // after this parameter to prevent or allow overwriting // variables at netdata.conf config_set_default(section, key, value); // fprintf(stderr, "SET section '%s', key '%s', value '%s'\n", section, key, value); } else if(strcmp(optarg, "get") == 0) { if(optind + 3 > argc) { fprintf(stderr, "%s", "\nUSAGE: -W get 'section' 'key' 'value'\n\n" " Prints settings of netdata.conf.\n" "\n" " These options interact with: -c netdata.conf\n" " -c netdata.conf has to be given before -W get.\n" "\n" ); exit(1); } if(!config_loaded) { fprintf(stderr, "warning: no configuration file has been loaded. Use -c CONFIG_FILE, before -W get. Using default config.\n"); config_load(NULL, 0); } backwards_compatible_config(); get_netdata_configured_variables(); const char *section = argv[optind]; const char *key = argv[optind + 1]; const char *def = argv[optind + 2]; const char *value = config_get(section, key, def); printf("%s\n", value); exit(0); } else { fprintf(stderr, "Unknown -W parameter '%s'\n", optarg); help(1); } } break; default: /* ? */ fprintf(stderr, "Unknown parameter '%c'\n", opt); help(1); break; } } } #ifdef _SC_OPEN_MAX // close all open file descriptors, except the standard ones // the caller may have left open files (lxc-attach has this issue) { int fd; for(fd = (int) (sysconf(_SC_OPEN_MAX) - 1); fd > 2; fd--) if(fd_is_valid(fd)) close(fd); } #endif if(!config_loaded) config_load(NULL, 0); // ------------------------------------------------------------------------ // initialize netdata { char *pmax = config_get(CONFIG_SECTION_GLOBAL, "glibc malloc arena max for plugins", "1"); if(pmax && *pmax) setenv("MALLOC_ARENA_MAX", pmax, 1); #if defined(HAVE_C_MALLOPT) i = (int)config_get_number(CONFIG_SECTION_GLOBAL, "glibc malloc arena max for netdata", 1); if(i > 0) mallopt(M_ARENA_MAX, 1); #endif // prepare configuration environment variables for the plugins get_netdata_configured_variables(); set_global_environment(); // work while we are cd into config_dir // to allow the plugins refer to their config // files using relative filenames if(chdir(netdata_configured_config_dir) == -1) fatal("Cannot cd to '%s'", netdata_configured_config_dir); } char *user = NULL; { // -------------------------------------------------------------------- // get the debugging flags from the configuration file char *flags = config_get(CONFIG_SECTION_GLOBAL, "debug flags", "0x0000000000000000"); setenv("NETDATA_DEBUG_FLAGS", flags, 1); debug_flags = strtoull(flags, NULL, 0); debug(D_OPTIONS, "Debug flags set to '0x%" PRIX64 "'.", debug_flags); if(debug_flags != 0) { struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY }; if(setrlimit(RLIMIT_CORE, &rl) != 0) error("Cannot request unlimited core dumps for debugging... Proceeding anyway..."); #ifdef HAVE_SYS_PRCTL_H prctl(PR_SET_DUMPABLE, 1, 0, 0, 0); #endif } // -------------------------------------------------------------------- // get log filenames and settings log_init(); error_log_limit_unlimited(); // -------------------------------------------------------------------- // load stream.conf { char filename[FILENAME_MAX + 1]; snprintfz(filename, FILENAME_MAX, "%s/stream.conf", netdata_configured_config_dir); appconfig_load(&stream_config, filename, 0); } // -------------------------------------------------------------------- // setup process signals // block signals while initializing threads. // this causes the threads to block signals. sigset_t sigset; sigfillset(&sigset); if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1) error("Could not block signals for threads"); // Catch signals which we want to use struct sigaction sa; sa.sa_flags = 0; // ingore all signals while we run in a signal handler sigfillset(&sa.sa_mask); // INFO: If we add signals here we have to unblock them // at popen.c when running a external plugin. // Ignore SIGPIPE completely. sa.sa_handler = SIG_IGN; if(sigaction(SIGPIPE, &sa, NULL) == -1) error("Failed to change signal handler for SIGPIPE"); sa.sa_handler = sig_handler_exit; if(sigaction(SIGINT, &sa, NULL) == -1) error("Failed to change signal handler for SIGINT"); sa.sa_handler = sig_handler_exit; if(sigaction(SIGTERM, &sa, NULL) == -1) error("Failed to change signal handler for SIGTERM"); sa.sa_handler = sig_handler_logrotate; if(sigaction(SIGHUP, &sa, NULL) == -1) error("Failed to change signal handler for SIGHUP"); // save database on SIGUSR1 sa.sa_handler = sig_handler_save; if(sigaction(SIGUSR1, &sa, NULL) == -1) error("Failed to change signal handler for SIGUSR1"); // reload health configuration on SIGUSR2 sa.sa_handler = sig_handler_reload_health; if(sigaction(SIGUSR2, &sa, NULL) == -1) error("Failed to change signal handler for SIGUSR2"); // -------------------------------------------------------------------- // get the required stack size of the threads of netdata i = pthread_attr_init(&attr); if(i != 0) fatal("pthread_attr_init() failed with code %d.", i); i = pthread_attr_getstacksize(&attr, &stacksize); if(i != 0) fatal("pthread_attr_getstacksize() failed with code %d.", i); else debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize); wanted_stacksize = (size_t)config_get_number(CONFIG_SECTION_GLOBAL, "pthread stack size", (long)stacksize); // -------------------------------------------------------------------- // check which threads are enabled and initialize them for (i = 0; static_threads[i].name != NULL ; i++) { struct netdata_static_thread *st = &static_threads[i]; if(st->config_name) st->enabled = config_get_boolean(st->config_section, st->config_name, st->enabled); if(st->enabled && st->init_routine) st->init_routine(); } // -------------------------------------------------------------------- // get the user we should run // IMPORTANT: this is required before web_files_uid() if(getuid() == 0) { user = config_get(CONFIG_SECTION_GLOBAL, "run as user", NETDATA_USER); } else { struct passwd *passwd = getpwuid(getuid()); user = config_get(CONFIG_SECTION_GLOBAL, "run as user", (passwd && passwd->pw_name)?passwd->pw_name:""); } // IMPORTANT: these have to run once, while single threaded web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid() web_files_gid(); // -------------------------------------------------------------------- // create the listening sockets web_server_threading_selection(); if(web_server_mode != WEB_SERVER_MODE_NONE) api_listen_sockets_setup(); } // initialize the log files open_all_log_files(); #ifdef NETDATA_INTERNAL_CHECKS if(debug_flags != 0) { struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY }; if(setrlimit(RLIMIT_CORE, &rl) != 0) error("Cannot request unlimited core dumps for debugging... Proceeding anyway..."); #ifdef HAVE_SYS_PRCTL_H prctl(PR_SET_DUMPABLE, 1, 0, 0, 0); #endif } #endif /* NETDATA_INTERNAL_CHECKS */ // fork, switch user, create pid file, set process priority if(become_daemon(dont_fork, user) == -1) fatal("Cannot daemonize myself."); info("netdata started on pid %d.", getpid()); // ------------------------------------------------------------------------ // set default pthread stack size - after we have forked if(stacksize < wanted_stacksize) { i = pthread_attr_setstacksize(&attr, wanted_stacksize); if(i != 0) fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i); else debug(D_SYSTEM, "Successfully set pthread stacksize to %zu bytes", wanted_stacksize); } // ------------------------------------------------------------------------ // initialize rrd, registry, health, rrdpush, etc. rrd_init(netdata_configured_hostname); // ------------------------------------------------------------------------ // enable log flood protection error_log_limit_reset(); // ------------------------------------------------------------------------ // spawn the threads web_server_config_options(); for (i = 0; static_threads[i].name != NULL ; i++) { struct netdata_static_thread *st = &static_threads[i]; if(st->enabled) { st->thread = mallocz(sizeof(pthread_t)); debug(D_SYSTEM, "Starting thread %s.", st->name); if(pthread_create(st->thread, &attr, st->start_routine, st)) error("failed to create new thread for %s.", st->name); else if(pthread_detach(*st->thread)) error("Cannot request detach of newly created %s thread.", st->name); } else debug(D_SYSTEM, "Not starting thread %s.", st->name); } info("netdata initialization completed. Enjoy real-time performance monitoring!"); // ------------------------------------------------------------------------ // block signals while initializing threads. sigset_t sigset; sigfillset(&sigset); if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) { error("Could not unblock signals for threads"); } // Handle flags set in the signal handler. while(1) { pause(); if(netdata_exit) { debug(D_EXIT, "Exit main loop of netdata."); netdata_cleanup_and_exit(0); exit(0); } } }