diff options
Diffstat (limited to 'daemon/main.c')
| -rw-r--r-- | daemon/main.c | 1098 |
1 files changed, 1098 insertions, 0 deletions
diff --git a/daemon/main.c b/daemon/main.c new file mode 100644 index 000000000..b2c4c80bf --- /dev/null +++ b/daemon/main.c @@ -0,0 +1,1098 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "common.h" + +struct config netdata_config = { + .sections = NULL, + .mutex = NETDATA_MUTEX_INITIALIZER, + .index = { + .avl_tree = { + .root = NULL, + .compar = appconfig_section_compare + }, + .rwlock = AVL_LOCK_INITIALIZER + } +}; + +void netdata_cleanup_and_exit(int ret) { + // enabling this, is wrong + // because the threads will be cancelled while cleaning up + // netdata_exit = 1; + + error_log_limit_unlimited(); + info("EXIT: netdata prepares to exit with code %d...", ret); + + // cleanup/save the database and exit + info("EXIT: cleaning up the database..."); + rrdhost_cleanup_all(); + + if(!ret) { + // exit cleanly + + // stop everything + info("EXIT: stopping master threads..."); + cancel_main_threads(); + + // free the database + info("EXIT: freeing database memory..."); + rrdhost_free_all(); + } + + // unlink the pid + if(pidfile[0]) { + info("EXIT: removing netdata PID file '%s'...", pidfile); + if(unlink(pidfile) != 0) + error("EXIT: cannot unlink pidfile '%s'.", pidfile); + } + + info("EXIT: all done - netdata is now exiting - bye bye..."); + exit(ret); +} + +struct netdata_static_thread static_threads[] = { + + NETDATA_PLUGIN_HOOK_CHECKS + NETDATA_PLUGIN_HOOK_FREEBSD + NETDATA_PLUGIN_HOOK_MACOS + + // linux internal plugins + NETDATA_PLUGIN_HOOK_LINUX_NFACCT + NETDATA_PLUGIN_HOOK_LINUX_PROC + NETDATA_PLUGIN_HOOK_LINUX_DISKSPACE + NETDATA_PLUGIN_HOOK_LINUX_CGROUPS + NETDATA_PLUGIN_HOOK_LINUX_TC + + NETDATA_PLUGIN_HOOK_IDLEJITTER + NETDATA_PLUGIN_HOOK_STATSD + + // common plugins for all systems + {"BACKENDS", NULL, NULL, 1, NULL, NULL, backends_main}, + {"WEB_SERVER[multi]", NULL, NULL, 1, NULL, NULL, socket_listen_main_multi_threaded}, + {"WEB_SERVER[single]", NULL, NULL, 0, NULL, NULL, socket_listen_main_single_threaded}, + {"WEB_SERVER[static1]", NULL, NULL, 0, NULL, NULL, socket_listen_main_static_threaded}, + {"STREAM", NULL, NULL, 0, NULL, NULL, rrdpush_sender_thread}, + + NETDATA_PLUGIN_HOOK_PLUGINSD + NETDATA_PLUGIN_HOOK_HEALTH + + {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 static_threaded = (web_server_mode == WEB_SERVER_MODE_STATIC_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; + + if (static_threads[i].start_routine == socket_listen_main_static_threaded) + static_threads[i].enabled = static_threaded; + } +} + +void web_server_config_options(void) { + web_client_timeout = (int) config_get_number(CONFIG_SECTION_WEB, "disconnect idle clients after seconds", web_client_timeout); + web_client_first_request_timeout = (int) config_get_number(CONFIG_SECTION_WEB, "timeout for first request", web_client_first_request_timeout); + web_client_streaming_rate_t = config_get_number(CONFIG_SECTION_WEB, "accept a streaming request every seconds", web_client_streaming_rate_t); + + 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; + + web_allow_connections_from = simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow connections from", "localhost *"), NULL, SIMPLE_PATTERN_EXACT); + web_allow_dashboard_from = simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow dashboard from", "localhost *"), NULL, SIMPLE_PATTERN_EXACT); + web_allow_badges_from = simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow badges from", "*"), NULL, SIMPLE_PATTERN_EXACT); + web_allow_registry_from = simple_pattern_create(config_get(CONFIG_SECTION_REGISTRY, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT); + web_allow_streaming_from = simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow streaming from", "*"), NULL, SIMPLE_PATTERN_EXACT); + web_allow_netdataconf_from = simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow netdata.conf from", "localhost fd* 10.* 192.168.* 172.16.* 172.17.* 172.18.* 172.19.* 172.20.* 172.21.* 172.22.* 172.23.* 172.24.* 172.25.* 172.26.* 172.27.* 172.28.* 172.29.* 172.30.* 172.31.*"), NULL, SIMPLE_PATTERN_EXACT); + +#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 signal) +{ + 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, signal); + 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 cancel_main_threads() { + error_log_limit_unlimited(); + + int i, found = 0; + usec_t max = 5 * USEC_PER_SEC, step = 100000; + for (i = 0; static_threads[i].name != NULL ; i++) { + if(static_threads[i].enabled == NETDATA_MAIN_THREAD_RUNNING) { + info("EXIT: Stopping master thread: %s", static_threads[i].name); + netdata_thread_cancel(*static_threads[i].thread); + found++; + } + } + + while(found && max > 0) { + max -= step; + info("Waiting %d threads to finish...", found); + sleep_usec(step); + found = 0; + for (i = 0; static_threads[i].name != NULL ; i++) { + if (static_threads[i].enabled != NETDATA_MAIN_THREAD_EXITED) + found++; + } + } + + if(found) { + for (i = 0; static_threads[i].name != NULL ; i++) { + if (static_threads[i].enabled != NETDATA_MAIN_THREAD_EXITED) + error("Master thread %s takes too long to exit. Giving up...", static_threads[i].name); + } + } + else + info("All threads finished."); +} + +struct option_def option_definitions[] = { + // 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"}, + { 'd', "Fork. Run in the background.", 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}, +}; + +int help(int exitcode) { + FILE *stream; + if(exitcode == 0) + stream = stdout; + else + stream = stderr; + + int num_opts = sizeof(option_definitions) / sizeof(struct option_def); + int i; + int max_len_arg = 0; + + // Compute maximum argument length + for( i = 0; i < num_opts; i++ ) { + if(option_definitions[i].arg_name) { + int len_arg = (int)strlen(option_definitions[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 <costa@tsaousis.gr>\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/netdata/netdata\n" + " Wiki / Docs: https://github.com/netdata/netdata/wiki\n" + " Support : https://github.com/netdata/netdata/issues\n" + " License : https://github.com/netdata/netdata/blob/master/LICENSE.md\n" + "\n" + " Twitter : https://twitter.com/linuxnetdata\n" + " Facebook : https://www.facebook.com/linuxnetdata/\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", option_definitions[i].val, max_len_arg, option_definitions[i].arg_name ? option_definitions[i].arg_name : "", option_definitions[i].description); + if(option_definitions[i].default_value) { + fprintf(stream, "\n %c %-*s Default: %s\n", ' ', max_len_arg, "", option_definitions[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); + return exitcode; +} + +// TODO: Remove this function with the nix major release. +void remove_option(int opt_index, int *argc, char **argv) { + int i; + + // 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 = 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); + error_log_errors_per_period_backup = 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; + } + + // ------------------------------------------------------------------------ + // get system paths + + netdata_configured_user_config_dir = config_get(CONFIG_SECTION_GLOBAL, "config directory", netdata_configured_user_config_dir); + netdata_configured_stock_config_dir = config_get(CONFIG_SECTION_GLOBAL, "stock config directory", netdata_configured_stock_config_dir); + netdata_configured_log_dir = config_get(CONFIG_SECTION_GLOBAL, "log directory", netdata_configured_log_dir); + netdata_configured_web_dir = config_get(CONFIG_SECTION_GLOBAL, "web files directory", netdata_configured_web_dir); + netdata_configured_cache_dir = config_get(CONFIG_SECTION_GLOBAL, "cache directory", netdata_configured_cache_dir); + netdata_configured_varlib_dir = config_get(CONFIG_SECTION_GLOBAL, "lib directory", netdata_configured_varlib_dir); + netdata_configured_home_dir = config_get(CONFIG_SECTION_GLOBAL, "home directory", netdata_configured_home_dir); + + { + char plugins_dirs[(FILENAME_MAX * 2) + 1]; + snprintfz(plugins_dirs, FILENAME_MAX * 2, "\"%s\" \"%s/custom-plugins.d\"", PLUGINS_DIR, CONFIG_DIR); + netdata_configured_plugins_dir_base = strdupz(config_get(CONFIG_SECTION_GLOBAL, "plugins directory", plugins_dirs)); + quoted_strings_splitter(netdata_configured_plugins_dir_base, plugin_directories, PLUGINSD_MAX_DIRECTORIES, config_isspace); + netdata_configured_plugins_dir = plugin_directories[0]; + } + + // ------------------------------------------------------------------------ + // 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", ""); + verify_netdata_host_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(); +} + +static void get_system_timezone(void) { + // 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); + + char buffer[FILENAME_MAX + 1] = ""; + const char *timezone = NULL; + ssize_t ret; + + // use the TZ variable + if(tz && *tz && *tz != ':') { + timezone = tz; + // info("TIMEZONE: using TZ variable '%s'", timezone); + } + + // use the contents of /etc/timezone + if(!timezone && !read_file("/etc/timezone", buffer, FILENAME_MAX)) { + timezone = buffer; + // info("TIMEZONE: using the contents of /etc/timezone: '%s'", timezone); + } + + // read the link /etc/localtime + if(!timezone) { + ret = readlink("/etc/localtime", buffer, FILENAME_MAX); + + if(ret > 0) { + buffer[ret] = '\0'; + + char *cmp = "/usr/share/zoneinfo/"; + size_t cmp_len = strlen(cmp); + + char *s = strstr(buffer, cmp); + if (s && s[cmp_len]) { + timezone = &s[cmp_len]; + // info("TIMEZONE: using the link of /etc/localtime: '%s'", timezone); + } + } + else + buffer[0] = '\0'; + } + + // find the timezone from strftime() + if(!timezone) { + time_t t; + struct tm *tmp, tmbuf; + + t = now_realtime_sec(); + tmp = localtime_r(&t, &tmbuf); + + if (tmp != NULL) { + if(strftime(buffer, FILENAME_MAX, "%Z", tmp) == 0) + buffer[0] = '\0'; + else { + buffer[FILENAME_MAX] = '\0'; + timezone = buffer; + // info("TIMEZONE: using strftime(): '%s'", timezone); + } + } + } + + if(timezone && *timezone) { + // make sure it does not have illegal characters + // info("TIMEZONE: fixing '%s'", timezone); + + size_t len = strlen(timezone); + char tmp[len + 1]; + char *d = tmp; + *d = '\0'; + + while(*timezone) { + if(isalnum(*timezone) || *timezone == '_' || *timezone == '/') + *d++ = *timezone++; + else + timezone++; + } + *d = '\0'; + strncpyz(buffer, tmp, len); + timezone = buffer; + // info("TIMEZONE: fixed as '%s'", timezone); + } + + if(!timezone || !*timezone) + timezone = "unknown"; + + netdata_configured_timezone = config_get(CONFIG_SECTION_GLOBAL, "timezone", timezone); +} + +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_user_config_dir), 1); + setenv("NETDATA_USER_CONFIG_DIR" , verify_required_directory(netdata_configured_user_config_dir), 1); + setenv("NETDATA_STOCK_CONFIG_DIR" , verify_required_directory(netdata_configured_stock_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); + + get_system_timezone(); + + // 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); +} + +static int load_netdata_conf(char *filename, char overwrite_used) { + errno = 0; + + int ret = 0; + + if(filename && *filename) { + ret = config_load(filename, overwrite_used); + if(!ret) + error("CONFIG: cannot load config file '%s'.", filename); + } + else { + filename = strdupz_path_subpath(netdata_configured_user_config_dir, "netdata.conf"); + + ret = config_load(filename, overwrite_used); + if(!ret) { + info("CONFIG: cannot load user config '%s'. Will try the stock version.", filename); + freez(filename); + + filename = strdupz_path_subpath(netdata_configured_stock_config_dir, "netdata.conf"); + ret = config_load(filename, overwrite_used); + if(!ret) + info("CONFIG: cannot load stock config '%s'. Running with internal defaults.", filename); + } + + freez(filename); + } + + return ret; +} + +int main(int argc, char **argv) { + int i; + int config_loaded = 0; + int dont_fork = 0; + size_t default_stacksize; + + // 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(option_definitions) / sizeof(struct option_def); + char optstring[(num_opts * 2) + 1]; + + int string_i = 0; + for( i = 0; i < num_opts; i++ ) { + optstring[string_i] = option_definitions[i].val; + string_i++; + if(option_definitions[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(load_netdata_conf(optarg, 1) != 1) { + error("Cannot load configuration file %s.", optarg); + return 1; + } + else { + debug(D_OPTIONS, "Configuration loaded from %s.", optarg); + config_loaded = 1; + } + break; + case 'D': + dont_fork = 1; + break; + case 'd': + dont_fork = 0; + break; + case 'h': + return help(0); + 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_buffer()) return 1; + if(unit_test_str2ld()) return 1; + 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()) return 1; + if(unit_test_storage()) return 1; + fprintf(stderr, "\n\nALL TESTS PASSED\n\n"); + return 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" + ); + return 1; + } + + const char *heystack = argv[optind]; + const char *needle = argv[optind + 1]; + size_t len = strlen(needle) + 1; + char wildcarded[len]; + + SIMPLE_PATTERN *p = simple_pattern_create(heystack, NULL, SIMPLE_PATTERN_EXACT); + int ret = simple_pattern_matches_extract(p, needle, wildcarded, len); + simple_pattern_free(p); + + if(ret) { + fprintf(stdout, "RESULT: MATCHED - pattern '%s' matches '%s', wildcarded '%s'\n", heystack, needle, wildcarded); + return 0; + } + else { + fprintf(stdout, "RESULT: NOT MATCHED - pattern '%s' does not match '%s', wildcarded '%s'\n", heystack, needle, wildcarded); + return 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" + ); + return 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" + ); + return 1; + } + + if(!config_loaded) { + fprintf(stderr, "warning: no configuration file has been loaded. Use -c CONFIG_FILE, before -W get. Using default config.\n"); + load_netdata_conf(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); + return 0; + } + else { + fprintf(stderr, "Unknown -W parameter '%s'\n", optarg); + return help(1); + } + } + break; + + default: /* ? */ + fprintf(stderr, "Unknown parameter '%c'\n", opt); + return help(1); + } + } + } + +#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) + load_netdata_conf(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_user_config_dir) == -1) + fatal("Cannot cd to '%s'", netdata_configured_user_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(); + + + // -------------------------------------------------------------------- + // setup process signals + + // block signals while initializing threads. + // this causes the threads to block signals. + signals_block(); + + // setup the signals we want to use + signals_init(); + + // setup threads configs + default_stacksize = netdata_threads_init(); + + + // -------------------------------------------------------------------- + // 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:""); + } + + // -------------------------------------------------------------------- + // create the listening sockets + + web_client_api_v1_init(); + 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 */ + + // get the max file limit + if(getrlimit(RLIMIT_NOFILE, &rlimit_nofile) != 0) + error("getrlimit(RLIMIT_NOFILE) failed"); + else + info("resources control: allowed file descriptors: soft = %zu, max = %zu", (size_t)rlimit_nofile.rlim_cur, (size_t)rlimit_nofile.rlim_max); + + // 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()); + + // IMPORTANT: these have to run once, while single threaded + // but after we have switched user + web_files_uid(); + web_files_gid(); + + netdata_threads_init_after_fork((size_t)config_get_number(CONFIG_SECTION_GLOBAL, "pthread stack size", (long)default_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(netdata_thread_t)); + debug(D_SYSTEM, "Starting thread %s.", st->name); + netdata_thread_create(st->thread, st->name, NETDATA_THREAD_OPTION_DEFAULT, st->start_routine, st); + } + else debug(D_SYSTEM, "Not starting thread %s.", st->name); + } + + info("netdata initialization completed. Enjoy real-time performance monitoring!"); + + + // ------------------------------------------------------------------------ + // unblock signals + + signals_unblock(); + + // ------------------------------------------------------------------------ + // Handle signals + + signals_handle(); + + // should never reach this point + // but we need it for rpmlint #2752 + return 1; +} |