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authorDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:19:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:20:17 +0000
commita64a253794ac64cb40befee54db53bde17dd0d49 (patch)
treec1024acc5f6e508814b944d99f112259bb28b1be /daemon/main.c
parentNew upstream version 1.10.0+dfsg (diff)
downloadnetdata-a64a253794ac64cb40befee54db53bde17dd0d49.tar.xz
netdata-a64a253794ac64cb40befee54db53bde17dd0d49.zip
New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'daemon/main.c')
-rw-r--r--daemon/main.c1098
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;
+}