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main.c
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main.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "common.h"
#include "buildinfo.h"
#include "daemon/watcher.h"
#include "static_threads.h"
#include "database/engine/page_test.h"
#ifdef ENABLE_SENTRY
#include "sentry-native/sentry-native.h"
#endif
#if defined(ENV32BIT)
#warning COMPILING 32BIT NETDATA
#endif
bool unittest_running = false;
int netdata_zero_metrics_enabled;
int netdata_anonymous_statistics_enabled;
int libuv_worker_threads = MIN_LIBUV_WORKER_THREADS;
bool ieee754_doubles = false;
time_t netdata_start_time = 0;
struct netdata_static_thread *static_threads;
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
}
};
typedef struct service_thread {
pid_t tid;
SERVICE_THREAD_TYPE type;
SERVICE_TYPE services;
char name[NETDATA_THREAD_NAME_MAX + 1];
bool stop_immediately;
bool cancelled;
union {
netdata_thread_t netdata_thread;
uv_thread_t uv_thread;
};
force_quit_t force_quit_callback;
request_quit_t request_quit_callback;
void *data;
} SERVICE_THREAD;
struct service_globals {
SPINLOCK lock;
Pvoid_t pid_judy;
} service_globals = {
.pid_judy = NULL,
};
SERVICE_THREAD *service_register(SERVICE_THREAD_TYPE thread_type, request_quit_t request_quit_callback, force_quit_t force_quit_callback, void *data, bool update __maybe_unused) {
SERVICE_THREAD *sth = NULL;
pid_t tid = gettid();
spinlock_lock(&service_globals.lock);
Pvoid_t *PValue = JudyLIns(&service_globals.pid_judy, tid, PJE0);
if(!*PValue) {
sth = callocz(1, sizeof(SERVICE_THREAD));
sth->tid = tid;
sth->type = thread_type;
sth->request_quit_callback = request_quit_callback;
sth->force_quit_callback = force_quit_callback;
sth->data = data;
os_thread_get_current_name_np(sth->name);
*PValue = sth;
switch(thread_type) {
default:
case SERVICE_THREAD_TYPE_NETDATA:
sth->netdata_thread = netdata_thread_self();
break;
case SERVICE_THREAD_TYPE_EVENT_LOOP:
case SERVICE_THREAD_TYPE_LIBUV:
sth->uv_thread = uv_thread_self();
break;
}
}
else {
sth = *PValue;
}
spinlock_unlock(&service_globals.lock);
return sth;
}
void service_exits(void) {
pid_t tid = gettid();
spinlock_lock(&service_globals.lock);
Pvoid_t *PValue = JudyLGet(service_globals.pid_judy, tid, PJE0);
if(PValue) {
freez(*PValue);
JudyLDel(&service_globals.pid_judy, tid, PJE0);
}
spinlock_unlock(&service_globals.lock);
}
bool service_running(SERVICE_TYPE service) {
static __thread SERVICE_THREAD *sth = NULL;
if(unlikely(!sth))
sth = service_register(SERVICE_THREAD_TYPE_NETDATA, NULL, NULL, NULL, false);
sth->services |= service;
return !(sth->stop_immediately || netdata_exit);
}
void service_signal_exit(SERVICE_TYPE service) {
spinlock_lock(&service_globals.lock);
Pvoid_t *PValue;
Word_t tid = 0;
bool first = true;
while((PValue = JudyLFirstThenNext(service_globals.pid_judy, &tid, &first))) {
SERVICE_THREAD *sth = *PValue;
if((sth->services & service)) {
sth->stop_immediately = true;
if(sth->request_quit_callback) {
spinlock_unlock(&service_globals.lock);
sth->request_quit_callback(sth->data);
spinlock_lock(&service_globals.lock);
}
}
}
spinlock_unlock(&service_globals.lock);
}
static void service_to_buffer(BUFFER *wb, SERVICE_TYPE service) {
if(service & SERVICE_MAINTENANCE)
buffer_strcat(wb, "MAINTENANCE ");
if(service & SERVICE_COLLECTORS)
buffer_strcat(wb, "COLLECTORS ");
if(service & SERVICE_REPLICATION)
buffer_strcat(wb, "REPLICATION ");
if(service & ABILITY_DATA_QUERIES)
buffer_strcat(wb, "DATA_QUERIES ");
if(service & ABILITY_WEB_REQUESTS)
buffer_strcat(wb, "WEB_REQUESTS ");
if(service & SERVICE_WEB_SERVER)
buffer_strcat(wb, "WEB_SERVER ");
if(service & SERVICE_ACLK)
buffer_strcat(wb, "ACLK ");
if(service & SERVICE_HEALTH)
buffer_strcat(wb, "HEALTH ");
if(service & SERVICE_STREAMING)
buffer_strcat(wb, "STREAMING ");
if(service & ABILITY_STREAMING_CONNECTIONS)
buffer_strcat(wb, "STREAMING_CONNECTIONS ");
if(service & SERVICE_CONTEXT)
buffer_strcat(wb, "CONTEXT ");
if(service & SERVICE_ANALYTICS)
buffer_strcat(wb, "ANALYTICS ");
if(service & SERVICE_EXPORTERS)
buffer_strcat(wb, "EXPORTERS ");
if(service & SERVICE_HTTPD)
buffer_strcat(wb, "HTTPD ");
}
static bool service_wait_exit(SERVICE_TYPE service, usec_t timeout_ut) {
BUFFER *service_list = buffer_create(1024, NULL);
BUFFER *thread_list = buffer_create(1024, NULL);
usec_t started_ut = now_monotonic_usec(), ended_ut;
size_t running;
SERVICE_TYPE running_services = 0;
// cancel the threads
running = 0;
running_services = 0;
{
buffer_flush(thread_list);
spinlock_lock(&service_globals.lock);
Pvoid_t *PValue;
Word_t tid = 0;
bool first = true;
while((PValue = JudyLFirstThenNext(service_globals.pid_judy, &tid, &first))) {
SERVICE_THREAD *sth = *PValue;
if(sth->services & service && sth->tid != gettid() && !sth->cancelled) {
sth->cancelled = true;
switch(sth->type) {
default:
case SERVICE_THREAD_TYPE_NETDATA:
netdata_thread_cancel(sth->netdata_thread);
break;
case SERVICE_THREAD_TYPE_EVENT_LOOP:
case SERVICE_THREAD_TYPE_LIBUV:
break;
}
if(running)
buffer_strcat(thread_list, ", ");
buffer_sprintf(thread_list, "'%s' (%d)", sth->name, sth->tid);
running++;
running_services |= sth->services & service;
if(sth->force_quit_callback) {
spinlock_unlock(&service_globals.lock);
sth->force_quit_callback(sth->data);
spinlock_lock(&service_globals.lock);
continue;
}
}
}
spinlock_unlock(&service_globals.lock);
}
service_signal_exit(service);
// signal them to stop
size_t last_running = 0;
size_t stale_time_ut = 0;
usec_t sleep_ut = 50 * USEC_PER_MS;
size_t log_countdown_ut = sleep_ut;
do {
if(running != last_running)
stale_time_ut = 0;
last_running = running;
running = 0;
running_services = 0;
buffer_flush(thread_list);
spinlock_lock(&service_globals.lock);
Pvoid_t *PValue;
Word_t tid = 0;
bool first = true;
while((PValue = JudyLFirstThenNext(service_globals.pid_judy, &tid, &first))) {
SERVICE_THREAD *sth = *PValue;
if(sth->services & service && sth->tid != gettid()) {
if(running)
buffer_strcat(thread_list, ", ");
buffer_sprintf(thread_list, "'%s' (%d)", sth->name, sth->tid);
running_services |= sth->services & service;
running++;
}
}
spinlock_unlock(&service_globals.lock);
if(running) {
log_countdown_ut -= (log_countdown_ut >= sleep_ut) ? sleep_ut : log_countdown_ut;
if(log_countdown_ut == 0 || running != last_running) {
log_countdown_ut = 20 * sleep_ut;
buffer_flush(service_list);
service_to_buffer(service_list, running_services);
netdata_log_info("SERVICE CONTROL: waiting for the following %zu services [ %s] to exit: %s",
running, buffer_tostring(service_list),
running <= 10 ? buffer_tostring(thread_list) : "");
}
sleep_usec(sleep_ut);
stale_time_ut += sleep_ut;
}
ended_ut = now_monotonic_usec();
} while(running && (ended_ut - started_ut < timeout_ut || stale_time_ut < timeout_ut));
if(running) {
buffer_flush(service_list);
service_to_buffer(service_list, running_services);
netdata_log_info("SERVICE CONTROL: "
"the following %zu service(s) [ %s] take too long to exit: %s; "
"giving up on them...",
running, buffer_tostring(service_list),
buffer_tostring(thread_list));
}
buffer_free(thread_list);
buffer_free(service_list);
return (running == 0);
}
void web_client_cache_destroy(void);
void netdata_cleanup_and_exit(int ret, const char *action, const char *action_result, const char *action_data) {
watcher_shutdown_begin();
nd_log_limits_unlimited();
netdata_log_info("NETDATA SHUTDOWN: initializing shutdown with code %d...", ret);
// send the stat from our caller
analytics_statistic_t statistic = { action, action_result, action_data };
analytics_statistic_send(&statistic);
// notify we are exiting
statistic = (analytics_statistic_t) {"EXIT", ret?"ERROR":"OK","-"};
analytics_statistic_send(&statistic);
char agent_crash_file[FILENAME_MAX + 1];
char agent_incomplete_shutdown_file[FILENAME_MAX + 1];
snprintfz(agent_crash_file, FILENAME_MAX, "%s/.agent_crash", netdata_configured_varlib_dir);
snprintfz(agent_incomplete_shutdown_file, FILENAME_MAX, "%s/.agent_incomplete_shutdown", netdata_configured_varlib_dir);
(void) rename(agent_crash_file, agent_incomplete_shutdown_file);
watcher_step_complete(WATCHER_STEP_ID_CREATE_SHUTDOWN_FILE);
#ifdef ENABLE_DBENGINE
if(dbengine_enabled) {
for (size_t tier = 0; tier < storage_tiers; tier++)
rrdeng_exit_mode(multidb_ctx[tier]);
}
#endif
watcher_step_complete(WATCHER_STEP_ID_DBENGINE_EXIT_MODE);
webrtc_close_all_connections();
watcher_step_complete(WATCHER_STEP_ID_CLOSE_WEBRTC_CONNECTIONS);
service_signal_exit(SERVICE_MAINTENANCE | ABILITY_DATA_QUERIES | ABILITY_WEB_REQUESTS |
ABILITY_STREAMING_CONNECTIONS | SERVICE_ACLK | SERVICE_ACLKSYNC);
watcher_step_complete(WATCHER_STEP_ID_DISABLE_MAINTENANCE_NEW_QUERIES_NEW_WEB_REQUESTS_NEW_STREAMING_CONNECTIONS_AND_ACLK);
service_wait_exit(SERVICE_MAINTENANCE, 3 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_MAINTENANCE_THREAD);
service_wait_exit(SERVICE_EXPORTERS | SERVICE_HEALTH | SERVICE_WEB_SERVER | SERVICE_HTTPD, 3 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_EXPORTERS_HEALTH_AND_WEB_SERVERS_THREADS);
service_wait_exit(SERVICE_COLLECTORS | SERVICE_STREAMING, 3 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_COLLECTORS_AND_STREAMING_THREADS);
service_wait_exit(SERVICE_REPLICATION, 3 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_REPLICATION_THREADS);
metadata_sync_shutdown_prepare();
watcher_step_complete(WATCHER_STEP_ID_PREPARE_METASYNC_SHUTDOWN);
ml_stop_threads();
ml_fini();
watcher_step_complete(WATCHER_STEP_ID_DISABLE_ML_DETECTION_AND_TRAINING_THREADS);
service_wait_exit(SERVICE_CONTEXT, 3 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_CONTEXT_THREAD);
web_client_cache_destroy();
watcher_step_complete(WATCHER_STEP_ID_CLEAR_WEB_CLIENT_CACHE);
service_wait_exit(SERVICE_ACLK, 3 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_ACLK_THREADS);
service_wait_exit(~0, 10 * USEC_PER_SEC);
watcher_step_complete(WATCHER_STEP_ID_STOP_ALL_REMAINING_WORKER_THREADS);
cancel_main_threads();
watcher_step_complete(WATCHER_STEP_ID_CANCEL_MAIN_THREADS);
if (ret)
{
watcher_step_complete(WATCHER_STEP_ID_FLUSH_DBENGINE_TIERS);
watcher_step_complete(WATCHER_STEP_ID_STOP_COLLECTION_FOR_ALL_HOSTS);
watcher_step_complete(WATCHER_STEP_ID_STOP_METASYNC_THREADS);
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_COLLECTORS_TO_FINISH);
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_MAIN_CACHE_TO_FINISH_FLUSHING);
watcher_step_complete(WATCHER_STEP_ID_STOP_DBENGINE_TIERS);
}
else
{
// exit cleanly
#ifdef ENABLE_DBENGINE
if(dbengine_enabled) {
for (size_t tier = 0; tier < storage_tiers; tier++)
rrdeng_prepare_exit(multidb_ctx[tier]);
for (size_t tier = 0; tier < storage_tiers; tier++) {
if (!multidb_ctx[tier])
continue;
completion_wait_for(&multidb_ctx[tier]->quiesce.completion);
completion_destroy(&multidb_ctx[tier]->quiesce.completion);
}
}
#endif
watcher_step_complete(WATCHER_STEP_ID_FLUSH_DBENGINE_TIERS);
rrd_finalize_collection_for_all_hosts();
watcher_step_complete(WATCHER_STEP_ID_STOP_COLLECTION_FOR_ALL_HOSTS);
metadata_sync_shutdown();
watcher_step_complete(WATCHER_STEP_ID_STOP_METASYNC_THREADS);
#ifdef ENABLE_DBENGINE
if(dbengine_enabled) {
size_t running = 1;
size_t count = 10;
while(running && count) {
running = 0;
for (size_t tier = 0; tier < storage_tiers; tier++)
running += rrdeng_collectors_running(multidb_ctx[tier]);
if (running) {
nd_log_limit_static_thread_var(erl, 1, 100 * USEC_PER_MS);
nd_log_limit(&erl, NDLS_DAEMON, NDLP_NOTICE, "waiting for %zu collectors to finish", running);
}
count--;
}
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_COLLECTORS_TO_FINISH);
while (pgc_hot_and_dirty_entries(main_cache)) {
pgc_flush_all_hot_and_dirty_pages(main_cache, PGC_SECTION_ALL);
sleep_usec(100 * USEC_PER_MS);
}
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_MAIN_CACHE_TO_FINISH_FLUSHING);
for (size_t tier = 0; tier < storage_tiers; tier++)
rrdeng_exit(multidb_ctx[tier]);
rrdeng_enq_cmd(NULL, RRDENG_OPCODE_SHUTDOWN_EVLOOP, NULL, NULL, STORAGE_PRIORITY_BEST_EFFORT, NULL, NULL);
watcher_step_complete(WATCHER_STEP_ID_STOP_DBENGINE_TIERS);
} else {
// Skip these steps
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_COLLECTORS_TO_FINISH);
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_MAIN_CACHE_TO_FINISH_FLUSHING);
watcher_step_complete(WATCHER_STEP_ID_STOP_DBENGINE_TIERS);
}
#else
// Skip these steps
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_COLLECTORS_TO_FINISH);
watcher_step_complete(WATCHER_STEP_ID_WAIT_FOR_DBENGINE_MAIN_CACHE_TO_FINISH_FLUSHING);
watcher_step_complete(WATCHER_STEP_ID_STOP_DBENGINE_TIERS);
#endif
}
sqlite_close_databases();
watcher_step_complete(WATCHER_STEP_ID_CLOSE_SQL_DATABASES);
sqlite_library_shutdown();
// unlink the pid
if(pidfile[0]) {
if(unlink(pidfile) != 0)
netdata_log_error("EXIT: cannot unlink pidfile '%s'.", pidfile);
}
watcher_step_complete(WATCHER_STEP_ID_REMOVE_PID_FILE);
#ifdef ENABLE_HTTPS
netdata_ssl_cleanup();
#endif
watcher_step_complete(WATCHER_STEP_ID_FREE_OPENSSL_STRUCTURES);
(void) unlink(agent_incomplete_shutdown_file);
watcher_step_complete(WATCHER_STEP_ID_REMOVE_INCOMPLETE_SHUTDOWN_FILE);
watcher_shutdown_end();
watcher_thread_stop();
#ifdef ENABLE_SENTRY
if (ret)
abort();
else {
sentry_native_fini();
exit(ret);
}
#else
exit(ret);
#endif
}
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))
netdata_log_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, true);
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, true);
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,
true);
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,
true);
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, true);
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,
true);
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, true);
web_allow_mgmt_dns =
make_dns_decision(CONFIG_SECTION_WEB, "allow management by dns","heuristic",web_allow_mgmt_from);
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 {
netdata_log_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) {
netdata_log_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) {
netdata_log_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;
}
}
// killpid kills pid with SIGTERM.
int killpid(pid_t pid) {
int ret;
netdata_log_debug(D_EXIT, "Request to kill pid %d", pid);
int signal = SIGTERM;
//#ifdef NETDATA_INTERNAL_CHECKS
// if(service_running(SERVICE_COLLECTORS))
// signal = SIGABRT;
//#endif
errno = 0;
ret = kill(pid, signal);
if (ret == -1) {
switch(errno) {
case ESRCH:
// We wanted the process to exit so just let the caller handle.
return ret;
case EPERM:
netdata_log_error("Cannot kill pid %d, but I do not have enough permissions.", pid);
break;
default:
netdata_log_error("Cannot kill pid %d, but I received an error.", pid);
break;
}
}
return ret;
}
static void set_nofile_limit(struct rlimit *rl) {
// get the num files allowed
if(getrlimit(RLIMIT_NOFILE, rl) != 0) {
netdata_log_error("getrlimit(RLIMIT_NOFILE) failed");
return;
}
netdata_log_info("resources control: allowed file descriptors: soft = %zu, max = %zu",
(size_t) rl->rlim_cur, (size_t) rl->rlim_max);
// make the soft/hard limits equal
rl->rlim_cur = rl->rlim_max;
if (setrlimit(RLIMIT_NOFILE, rl) != 0) {
netdata_log_error("setrlimit(RLIMIT_NOFILE, { %zu, %zu }) failed", (size_t)rl->rlim_cur, (size_t)rl->rlim_max);
}
// sanity check to make sure we have enough file descriptors available to open
if (getrlimit(RLIMIT_NOFILE, rl) != 0) {
netdata_log_error("getrlimit(RLIMIT_NOFILE) failed");
return;
}
if (rl->rlim_cur < 1024)
netdata_log_error("Number of open file descriptors allowed for this process is too low (RLIMIT_NOFILE=%zu)", (size_t)rl->rlim_cur);
}
void cancel_main_threads() {
nd_log_limits_unlimited();
if (!static_threads)
return;
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) {
if (static_threads[i].thread) {
netdata_log_info("EXIT: Stopping main thread: %s", static_threads[i].name);
netdata_thread_cancel(*static_threads[i].thread);
} else {
netdata_log_info("EXIT: No thread running (marking as EXITED): %s", static_threads[i].name);
static_threads[i].enabled = NETDATA_MAIN_THREAD_EXITED;
}
found++;
}
}
netdata_exit = 1;
while(found && max > 0) {
max -= step;
netdata_log_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)
continue;
// Don't wait ourselves.
if (static_threads[i].thread && (*static_threads[i].thread == pthread_self()))
continue;
found++;
}
}
if(found) {
for (i = 0; static_threads[i].name != NULL ; i++) {
if (static_threads[i].enabled != NETDATA_MAIN_THREAD_EXITED)
netdata_log_error("Main thread %s takes too long to exit. Giving up...", static_threads[i].name);
}
}
else
netdata_log_info("All threads finished.");
for (i = 0; static_threads[i].name != NULL ; i++)
freez(static_threads[i].thread);
freez(static_threads);
static_threads = NULL;
}
static const struct option_def {
const char val;
const char *description;
const char *arg_name;
const char *default_value;
} option_definitions[] = {
{'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) 2016-2023, Netdata, Inc. <info@netdata.cloud>\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/netdatahq\n"
" LinkedIn : https://linkedin.com/company/netdata-cloud/\n"
" Facebook : https://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 sqlite-meta-recover Run recovery on the metadata database and exit.\n\n"
" -W sqlite-compact Reclaim metadata database unused space and exit.\n\n"
" -W sqlite-analyze Run update statistics 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,G\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\n"
" of F MiB, G libuv workers (default 16) and exit.\n\n"
#endif
" -W set section option value\n"
" set netdata.conf option from the command line.\n\n"
" -W buildinfo Print the version, the configure options,\n"
" a list of optional features, and whether they\n"
" are enabled or not.\n\n"
" -W buildinfojson Print the version, the configure options,\n"
" a list of optional features, and whether they\n"
" are enabled or not, in JSON format.\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"
" - USR2 Reload health configuration.\n"
"\n"
);
fflush(stream);
return exitcode;
}
#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);
netdata_ssl_security_key = config_get(CONFIG_SECTION_WEB, "ssl key", filename);
snprintfz(filename, FILENAME_MAX, "%s/ssl/cert.pem",netdata_configured_user_config_dir);
netdata_ssl_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");
netdata_ssl_initialize_openssl();
}
#endif
static void log_init(void) {
nd_log_set_facility(config_get(CONFIG_SECTION_LOGS, "facility", "daemon"));
time_t period = ND_LOG_DEFAULT_THROTTLE_PERIOD;
size_t logs = ND_LOG_DEFAULT_THROTTLE_LOGS;
period = config_get_number(CONFIG_SECTION_LOGS, "logs flood protection period", period);
logs = (unsigned long)config_get_number(CONFIG_SECTION_LOGS, "logs to trigger flood protection", (long long int)logs);
nd_log_set_flood_protection(logs, period);
const char *netdata_log_level = getenv("NETDATA_LOG_LEVEL");
netdata_log_level = netdata_log_level ? nd_log_id2priority(nd_log_priority2id(netdata_log_level)) : NDLP_INFO_STR;
nd_log_set_priority_level(config_get(CONFIG_SECTION_LOGS, "level", netdata_log_level));
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/debug.log", netdata_configured_log_dir);
nd_log_set_user_settings(NDLS_DEBUG, config_get(CONFIG_SECTION_LOGS, "debug", filename));
bool with_journal = is_stderr_connected_to_journal() /* || nd_log_journal_socket_available() */;
if(with_journal)
snprintfz(filename, FILENAME_MAX, "journal");
else
snprintfz(filename, FILENAME_MAX, "%s/daemon.log", netdata_configured_log_dir);
nd_log_set_user_settings(NDLS_DAEMON, config_get(CONFIG_SECTION_LOGS, "daemon", filename));
if(with_journal)
snprintfz(filename, FILENAME_MAX, "journal");
else
snprintfz(filename, FILENAME_MAX, "%s/collector.log", netdata_configured_log_dir);
nd_log_set_user_settings(NDLS_COLLECTORS, config_get(CONFIG_SECTION_LOGS, "collector", filename));
snprintfz(filename, FILENAME_MAX, "%s/access.log", netdata_configured_log_dir);
nd_log_set_user_settings(NDLS_ACCESS, config_get(CONFIG_SECTION_LOGS, "access", filename));
if(with_journal)
snprintfz(filename, FILENAME_MAX, "journal");
else
snprintfz(filename, FILENAME_MAX, "%s/health.log", netdata_configured_log_dir);
nd_log_set_user_settings(NDLS_HEALTH, config_get(CONFIG_SECTION_LOGS, "health", filename));
#ifdef ENABLE_ACLK
aclklog_enabled = config_get_boolean(CONFIG_SECTION_CLOUD, "conversation log", CONFIG_BOOLEAN_NO);
if (aclklog_enabled) {
snprintfz(filename, FILENAME_MAX, "%s/aclk.log", netdata_configured_log_dir);
nd_log_set_user_settings(NDLS_ACLK, config_get(CONFIG_SECTION_CLOUD, "conversation log file", filename));
}
#endif
}
char *initialize_lock_directory_path(char *prefix)
{
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/lock", prefix);
return config_get(CONFIG_SECTION_DIRECTORIES, "lock", 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, "config directory",
CONFIG_SECTION_DIRECTORIES, "config");
config_move(CONFIG_SECTION_GLOBAL, "stock config directory",
CONFIG_SECTION_DIRECTORIES, "stock config");
config_move(CONFIG_SECTION_GLOBAL, "log directory",
CONFIG_SECTION_DIRECTORIES, "log");
config_move(CONFIG_SECTION_GLOBAL, "web files directory",
CONFIG_SECTION_DIRECTORIES, "web");
config_move(CONFIG_SECTION_GLOBAL, "cache directory",
CONFIG_SECTION_DIRECTORIES, "cache");
config_move(CONFIG_SECTION_GLOBAL, "lib directory",
CONFIG_SECTION_DIRECTORIES, "lib");
config_move(CONFIG_SECTION_GLOBAL, "home directory",
CONFIG_SECTION_DIRECTORIES, "home");
config_move(CONFIG_SECTION_GLOBAL, "lock directory",
CONFIG_SECTION_DIRECTORIES, "lock");
config_move(CONFIG_SECTION_GLOBAL, "plugins directory",
CONFIG_SECTION_DIRECTORIES, "plugins");
config_move(CONFIG_SECTION_HEALTH, "health configuration directory",
CONFIG_SECTION_DIRECTORIES, "health config");
config_move(CONFIG_SECTION_HEALTH, "stock health configuration directory",
CONFIG_SECTION_DIRECTORIES, "stock health config");
config_move(CONFIG_SECTION_REGISTRY, "registry db directory",
CONFIG_SECTION_DIRECTORIES, "registry");
config_move(CONFIG_SECTION_GLOBAL, "debug log",
CONFIG_SECTION_LOGS, "debug");
config_move(CONFIG_SECTION_GLOBAL, "error log",
CONFIG_SECTION_LOGS, "error");
config_move(CONFIG_SECTION_GLOBAL, "access log",
CONFIG_SECTION_LOGS, "access");
config_move(CONFIG_SECTION_GLOBAL, "facility log",
CONFIG_SECTION_LOGS, "facility");
config_move(CONFIG_SECTION_GLOBAL, "errors flood protection period",
CONFIG_SECTION_LOGS, "errors flood protection period");
config_move(CONFIG_SECTION_GLOBAL, "errors to trigger flood protection",
CONFIG_SECTION_LOGS, "errors to trigger flood protection");
config_move(CONFIG_SECTION_GLOBAL, "debug flags",
CONFIG_SECTION_LOGS, "debug flags");
config_move(CONFIG_SECTION_GLOBAL, "TZ environment variable",
CONFIG_SECTION_ENV_VARS, "TZ");
config_move(CONFIG_SECTION_PLUGINS, "PATH environment variable",
CONFIG_SECTION_ENV_VARS, "PATH");