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main.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "common.h"
#include "buildinfo.h"
int netdata_zero_metrics_enabled;
int netdata_anonymous_statistics_enabled;
struct config netdata_config = {
.first_section = NULL,
.last_section = 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);
send_statistics("EXIT", ret?"ERROR":"OK","-");
// cleanup/save the database and exit
info("EXIT: cleaning up the database...");
rrdhost_cleanup_all();
if(!ret) {
// exit cleanly
// stop everything
info("EXIT: stopping static threads...");
cancel_main_threads();
// free the database
info("EXIT: freeing database memory...");
#ifdef ENABLE_DBENGINE
rrdeng_prepare_exit(&multidb_ctx);
#endif
rrdhost_free_all();
#ifdef ENABLE_DBENGINE
rrdeng_exit(&multidb_ctx);
#endif
}
// 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);
}
#ifdef ENABLE_HTTPS
security_clean_openssl();
#endif
#ifdef ENABLE_DBENGINE
free_global_guid_map();
#endif
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_PROC
NETDATA_PLUGIN_HOOK_LINUX_DISKSPACE
NETDATA_PLUGIN_HOOK_LINUX_CGROUPS
NETDATA_PLUGIN_HOOK_LINUX_TC
NETDATA_PLUGIN_HOOK_IDLEJITTER
NETDATA_PLUGIN_HOOK_STATSD
#ifdef ENABLE_ACLK
NETDATA_ACLK_HOOK
#endif
// common plugins for all systems
{"BACKENDS", NULL, NULL, 1, NULL, NULL, backends_main},
{"EXPORTING", NULL, NULL, 1, NULL, NULL, exporting_main},
{"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 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_static_threaded)
static_threads[i].enabled = static_threaded;
}
}
int make_dns_decision(const char *section_name, const char *config_name, const char *default_value, SIMPLE_PATTERN *p)
{
char *value = config_get(section_name,config_name,default_value);
if(!strcmp("yes",value))
return 1;
if(!strcmp("no",value))
return 0;
if(strcmp("heuristic",value))
error("Invalid configuration option '%s' for '%s'/'%s'. Valid options are 'yes', 'no' and 'heuristic'. Proceeding with 'heuristic'",
value, section_name, config_name);
return simple_pattern_is_potential_name(p);
}
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_connections_dns =
make_dns_decision(CONFIG_SECTION_WEB, "allow connections by dns", "heuristic", web_allow_connections_from);
web_allow_dashboard_from =
simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow dashboard from", "localhost *"),
NULL, SIMPLE_PATTERN_EXACT);
web_allow_dashboard_dns =
make_dns_decision(CONFIG_SECTION_WEB, "allow dashboard by dns", "heuristic", web_allow_dashboard_from);
web_allow_badges_from =
simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow badges from", "*"), NULL, SIMPLE_PATTERN_EXACT);
web_allow_badges_dns =
make_dns_decision(CONFIG_SECTION_WEB, "allow badges by dns", "heuristic", web_allow_badges_from);
web_allow_registry_from =
simple_pattern_create(config_get(CONFIG_SECTION_REGISTRY, "allow from", "*"), NULL, SIMPLE_PATTERN_EXACT);
web_allow_registry_dns = make_dns_decision(CONFIG_SECTION_REGISTRY, "allow by dns", "heuristic",
web_allow_registry_from);
web_allow_streaming_from = simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow streaming from", "*"),
NULL, SIMPLE_PATTERN_EXACT);
web_allow_streaming_dns = make_dns_decision(CONFIG_SECTION_WEB, "allow streaming by dns", "heuristic",
web_allow_streaming_from);
// Note the default is not heuristic, the wildcards could match DNS but the intent is ip-addresses.
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.* UNKNOWN"), NULL, SIMPLE_PATTERN_EXACT);
web_allow_netdataconf_dns =
make_dns_decision(CONFIG_SECTION_WEB, "allow netdata.conf by dns", "no", web_allow_netdataconf_from);
web_allow_mgmt_from =
simple_pattern_create(config_get(CONFIG_SECTION_WEB, "allow management from", "localhost"),
NULL, SIMPLE_PATTERN_EXACT);
web_allow_mgmt_dns =
make_dns_decision(CONFIG_SECTION_WEB, "allow management by dns","heuristic",web_allow_mgmt_from);
#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 */
}
// killpid kills pid with SIGTERM.
int killpid(pid_t pid) {
int ret;
debug(D_EXIT, "Request to kill pid %d", pid);
errno = 0;
ret = kill(pid, SIGTERM);
if (ret == -1) {
switch(errno) {
case ESRCH:
// We wanted the process to exit so just let the caller handle.
return ret;
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 main thread: %s", static_threads[i].name);
netdata_thread_cancel(*static_threads[i].thread);
found++;
}
}
netdata_exit = 1;
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("Main 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) 2016-2020, Netdata, Inc. <[email protected]>\n"
" Released under GNU General Public License v3 or later.\n"
" All rights reserved.\n"
"\n"
" Home Page : https://netdata.cloud\n"
" Source Code: https://github.com/netdata/netdata\n"
" Docs : https://learn.netdata.cloud\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"
#ifdef ENABLE_DBENGINE
" -W createdataset=N Create a DB engine dataset of N seconds and exit.\n\n"
" -W stresstest=A,B,C,D,E,F\n"
" Run a DB engine stress test for A seconds,\n"
" with B writers and C readers, with a ramp up\n"
" time of D seconds for writers, a page cache\n"
" size of E MiB, an optional disk space limit"
" of F MiB and exit.\n\n"
#endif
" -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"
" -W \"claim -token=TOKEN -rooms=ROOM1,ROOM2\"\n"
" Claim the agent to the workspace rooms pointed to by TOKEN and ROOM*.\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;
}
#ifdef ENABLE_HTTPS
static void security_init(){
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/ssl/key.pem",netdata_configured_user_config_dir);
security_key = config_get(CONFIG_SECTION_WEB, "ssl key", filename);
snprintfz(filename, FILENAME_MAX, "%s/ssl/cert.pem",netdata_configured_user_config_dir);
security_cert = config_get(CONFIG_SECTION_WEB, "ssl certificate", filename);
tls_version = config_get(CONFIG_SECTION_WEB, "tls version", "1.3");
tls_ciphers = config_get(CONFIG_SECTION_WEB, "tls ciphers", "none");
security_openssl_library();
}
#endif
static 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);
char deffacility[8];
snprintfz(deffacility,7,"%s","daemon");
facility_log = config_get(CONFIG_SECTION_GLOBAL, "facility log", deffacility);
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);
}
char *initialize_lock_directory_path(char *prefix)
{
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/lock", prefix);
return config_get(CONFIG_SECTION_GLOBAL, "lock directory", filename);
}
static void backwards_compatible_config() {
// 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);
char *env_home=getenv("HOME");
netdata_configured_home_dir = config_get(CONFIG_SECTION_GLOBAL, "home directory", env_home?env_home:netdata_configured_home_dir);
netdata_configured_lock_dir = initialize_lock_directory_path(netdata_configured_varlib_dir);
{
pluginsd_initialize_plugin_directories();
netdata_configured_primary_plugins_dir = plugin_directories[PLUGINSD_STOCK_PLUGINS_DIRECTORY_PATH];
}
// ------------------------------------------------------------------------
// 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)));
#ifdef ENABLE_DBENGINE
// ------------------------------------------------------------------------
// get default Database Engine page cache size in MiB
default_rrdeng_page_cache_mb = (int) config_get_number(CONFIG_SECTION_GLOBAL, "page cache size", default_rrdeng_page_cache_mb);
if(default_rrdeng_page_cache_mb < RRDENG_MIN_PAGE_CACHE_SIZE_MB) {
error("Invalid page cache size %d given. Defaulting to %d.", default_rrdeng_page_cache_mb, RRDENG_MIN_PAGE_CACHE_SIZE_MB);
default_rrdeng_page_cache_mb = RRDENG_MIN_PAGE_CACHE_SIZE_MB;
}
// ------------------------------------------------------------------------
// get default Database Engine disk space quota in MiB
default_rrdeng_disk_quota_mb = (int) config_get_number(CONFIG_SECTION_GLOBAL, "dbengine disk space", default_rrdeng_disk_quota_mb);
if(default_rrdeng_disk_quota_mb < RRDENG_MIN_DISK_SPACE_MB) {
error("Invalid dbengine disk space %d given. Defaulting to %d.", default_rrdeng_disk_quota_mb, RRDENG_MIN_DISK_SPACE_MB);
default_rrdeng_disk_quota_mb = RRDENG_MIN_DISK_SPACE_MB;
}
default_multidb_disk_quota_mb = (int) config_get_number(CONFIG_SECTION_GLOBAL, "dbengine multihost disk space", compute_multidb_diskspace());
if(default_multidb_disk_quota_mb < RRDENG_MIN_DISK_SPACE_MB) {
error("Invalid multidb disk space %d given. Defaulting to %d.", default_multidb_disk_quota_mb, default_rrdeng_disk_quota_mb);
default_multidb_disk_quota_mb = default_rrdeng_disk_quota_mb;
}
#endif
// ------------------------------------------------------------------------
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_VERSION" , program_version, 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_primary_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_LOCK_DIR" , netdata_configured_lock_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);
char *default_port = appconfig_get(&netdata_config, CONFIG_SECTION_WEB, "default port", NULL);
int clean = 0;
if (!default_port) {
default_port = strdupz("19999");
clean = 1;
}
setenv("NETDATA_LISTEN_PORT" , default_port, 1);
if(clean)
freez(default_port);
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, NULL);
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, NULL);
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, NULL);
if(!ret)
info("CONFIG: cannot load stock config '%s'. Running with internal defaults.", filename);
}
freez(filename);
}
return ret;
}
// coverity[ +tainted_string_sanitize_content : arg-0 ]
static inline void coverity_remove_taint(char *s)
{
(void)s;
}
int get_system_info(struct rrdhost_system_info *system_info) {
char *script;
script = mallocz(sizeof(char) * (strlen(netdata_configured_primary_plugins_dir) + strlen("system-info.sh") + 2));
sprintf(script, "%s/%s", netdata_configured_primary_plugins_dir, "system-info.sh");
if (unlikely(access(script, R_OK) != 0)) {
info("System info script %s not found.",script);
freez(script);
return 1;
}
pid_t command_pid;
info("Executing %s", script);
FILE *fp = mypopen(script, &command_pid);
if(fp) {
char line[200 + 1];
// Removed the double strlens, if the Coverity tainted string warning reappears I'll revert.
// One time init code, but I'm curious about the warning...
while (fgets(line, 200, fp) != NULL) {
char *value=line;
while (*value && *value != '=') value++;
if (*value=='=') {
*value='\0';
value++;
char *end = value;
while (*end && *end != '\n') end++;
*end = '\0'; // Overwrite newline if present
coverity_remove_taint(line); // I/O is controlled result of system_info.sh - not tainted
coverity_remove_taint(value);
if(unlikely(rrdhost_set_system_info_variable(system_info, line, value))) {
info("Unexpected environment variable %s=%s", line, value);
}
else {
info("%s=%s", line, value);
setenv(line, value, 1);
}
}
}
mypclose(fp, command_pid);
}
freez(script);
return 0;
}
void send_statistics( const char *action, const char *action_result, const char *action_data) {
static char *as_script;
if (netdata_anonymous_statistics_enabled == -1) {
char *optout_file = mallocz(sizeof(char) * (strlen(netdata_configured_user_config_dir) +strlen(".opt-out-from-anonymous-statistics") + 2));
sprintf(optout_file, "%s/%s", netdata_configured_user_config_dir, ".opt-out-from-anonymous-statistics");
if (likely(access(optout_file, R_OK) != 0)) {
as_script = mallocz(sizeof(char) * (strlen(netdata_configured_primary_plugins_dir) + strlen("anonymous-statistics.sh") + 2));
sprintf(as_script, "%s/%s", netdata_configured_primary_plugins_dir, "anonymous-statistics.sh");
if (unlikely(access(as_script, R_OK) != 0)) {
netdata_anonymous_statistics_enabled=0;
info("Anonymous statistics script %s not found.",as_script);
freez(as_script);
} else {
netdata_anonymous_statistics_enabled=1;
}
} else {
netdata_anonymous_statistics_enabled = 0;
as_script = NULL;
}
freez(optout_file);
}
if(!netdata_anonymous_statistics_enabled) return;
if (!action) return;
if (!action_result) action_result="";
if (!action_data) action_data="";
char *command_to_run=mallocz(sizeof(char) * (strlen(action) + strlen(action_result) + strlen(action_data) + strlen(as_script) + 10));
pid_t command_pid;
sprintf(command_to_run,"%s '%s' '%s' '%s'", as_script, action, action_result, action_data);
info("%s", command_to_run);
FILE *fp = mypopen(command_to_run, &command_pid);
if(fp) {
char buffer[100 + 1];
while (fgets(buffer, 100, fp) != NULL);
mypclose(fp, command_pid);
}
freez(command_to_run);
}
void set_silencers_filename() {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/health.silencers.json", netdata_configured_varlib_dir);
silencers_filename = config_get(CONFIG_SECTION_HEALTH, "silencers file", filename);
}
/* Any config setting that can be accessed without a default value i.e. configget(...,...,NULL) *MUST*
be set in this procedure to be called in all the relevant code paths.
*/
void post_conf_load(char **user)
{
// --------------------------------------------------------------------
// 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:"");
}
// --------------------------------------------------------------------
// Check if the cloud is enabled
#if defined( DISABLE_CLOUD ) || !defined( ENABLE_ACLK )
netdata_cloud_setting = 0;
#else
netdata_cloud_setting = appconfig_get_boolean(&cloud_config, CONFIG_SECTION_GLOBAL, "enabled", 1);
#endif
// This must be set before any point in the code that accesses it. Do not move it from this function.
appconfig_get(&cloud_config, CONFIG_SECTION_GLOBAL, "cloud base url", DEFAULT_CLOUD_BASE_URL);
}
int main(int argc, char **argv) {
int i;
int config_loaded = 0;
int dont_fork = 0;
size_t default_stacksize;
char *user = NULL;
netdata_ready=0;
// 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++;
}
}
if (argc > 1 && strcmp(argv[1], SPAWN_SERVER_COMMAND_LINE_ARGUMENT) == 0) {
// don't run netdata, this is the spawn server
spawn_server();
exit(0);
}
// 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);
post_conf_load(&user);
load_cloud_conf(1);
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);