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_config_dir = config_get(CONFIG_SECTION_GLOBAL, "config directory", CONFIG_DIR);
netdata_configured_log_dir = config_get(CONFIG_SECTION_GLOBAL, "log directory", LOG_DIR);
netdata_configured_web_dir = config_get(CONFIG_SECTION_GLOBAL, "web files directory", WEB_DIR);
netdata_configured_cache_dir = config_get(CONFIG_SECTION_GLOBAL, "cache directory", CACHE_DIR);
netdata_configured_varlib_dir = config_get(CONFIG_SECTION_GLOBAL, "lib directory", VARLIB_DIR);
netdata_configured_home_dir = config_get(CONFIG_SECTION_GLOBAL, "home directory", CACHE_DIR);
{
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();
}
int main(int argc, char **argv)
{
int i;
int config_loaded = 0;
int dont_fork = 0;
size_t wanted_stacksize = 0, stacksize = 0;
pthread_attr_t attr;
// global initialization
get_HZ();
// set the name for logging
program_name = "netdata";
// parse command line.
// 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("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("global", "history", argv[i+1]);
fprintf(stderr, "%s: deprecated option -- %s -- This option will be removed with V2.*.\n", argv[0], argv[i]);
remove_option(i, &argc, argv);
}
else i++;
}
}
// parse options
{
int num_opts = sizeof(options) / sizeof(struct option_def);
char optstring[(num_opts * 2) + 1];
int string_i = 0;
for( i = 0; i < num_opts; i++ ) {
optstring[string_i] = options[i].val;
string_i++;
if(options[i].arg_name) {
optstring[string_i] = ':';
string_i++;
}
}
int opt;
while( (opt = getopt(argc, argv, optstring)) != -1 ) {
switch(opt) {
case 'c':
if(load_config(optarg, 1) != 1) {
error("Cannot load configuration file %s.", optarg);
exit(1);
}
else {
debug(D_OPTIONS, "Configuration loaded from %s.", optarg);
config_loaded = 1;
}
break;
case 'D':
dont_fork = 1;
break;
case 'h':
help(0);
break;
case 'i':
config_set("global", "bind to", optarg);
break;
case 'P':
strncpy(pidfile, optarg, FILENAME_MAX);
pidfile[FILENAME_MAX] = '\0';
break;
case 'p':
config_set("global", "default port", optarg);
break;
case 's':
config_set("global", "host access prefix", optarg);
break;
case 't':
config_set("global", "update every", optarg);
break;
case 'u':
config_set("global", "run as user", optarg);
break;
case 'v':
// TODO: Outsource version to makefile which can compute version from git.
printf("netdata 1.2.1_master\n");
return 0;
break;
case 'W':
{
char* stacksize = "stacksize=";
char* debug_flags_string = "debug_flags=";
if(strcmp(optarg, "unittest") == 0) {
rrd_update_every = 1;
if(run_all_mockup_tests()) exit(1);
if(unit_test_storage()) exit(1);
fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
exit(0);
} else if(strncmp(optarg, stacksize, strlen(stacksize)) == 0) {
optarg += strlen(stacksize);
config_set("global", "pthread stack size", optarg);
} else if(strncmp(optarg, debug_flags_string, strlen(debug_flags_string)) == 0) {
optarg += strlen(debug_flags_string);
config_set("global", "debug flags", optarg);
debug_flags = strtoull(optarg, NULL, 0);
}
}
break;
default: /* ? */
help(1);
break;
}
}
}
if(!config_loaded) load_config(NULL, 0);
// prepare configuration environment variables for the plugins
setenv("NETDATA_CONFIG_DIR" , config_get("global", "config directory" , CONFIG_DIR) , 1);
setenv("NETDATA_PLUGINS_DIR", config_get("global", "plugins directory" , PLUGINS_DIR), 1);
setenv("NETDATA_WEB_DIR" , config_get("global", "web files directory", WEB_DIR) , 1);
setenv("NETDATA_CACHE_DIR" , config_get("global", "cache directory" , CACHE_DIR) , 1);
setenv("NETDATA_LIB_DIR" , config_get("global", "lib directory" , VARLIB_DIR) , 1);
setenv("NETDATA_LOG_DIR" , config_get("global", "log directory" , LOG_DIR) , 1);
setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
setenv("HOME" , config_get("global", "home directory" , CACHE_DIR) , 1);
// disable buffering for python plugins
setenv("PYTHONUNBUFFERED", "1", 1);
// avoid flood calls to stat(/etc/localtime)
// http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
setenv("TZ", ":/etc/localtime", 0);
{
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("plugins", "PATH environment variable", path), 1);
}
// cd to /tmp to avoid any plugins writing files at random places
if(chdir("/tmp")) error("netdata: ERROR: Cannot cd to /tmp");
char *input_log_file = NULL;
char *output_log_file = NULL;
char *error_log_file = NULL;
char *access_log_file = NULL;
char *user = NULL;
{
char *flags = config_get("global", "debug flags", "0x00000000");
setenv("NETDATA_DEBUG_FLAGS", flags, 1);
debug_flags = strtoull(flags, NULL, 0);
debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
if(debug_flags != 0) {
struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
if(setrlimit(RLIMIT_CORE, &rl) != 0)
info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
}
// --------------------------------------------------------------------
#ifdef MADV_MERGEABLE
enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
#else
#warning "Kernel memory deduplication (KSM) is not available"
#endif
// --------------------------------------------------------------------
global_host_prefix = config_get("global", "host access prefix", "");
setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
// --------------------------------------------------------------------
output_log_file = config_get("global", "debug log", LOG_DIR "/debug.log");
if(strcmp(output_log_file, "syslog") == 0) {
output_log_syslog = 1;
output_log_file = NULL;
}
else if(strcmp(output_log_file, "none") == 0) {
output_log_syslog = 0;
output_log_file = NULL;
}
else output_log_syslog = 0;
// --------------------------------------------------------------------
error_log_file = config_get("global", "error log", LOG_DIR "/error.log");
if(strcmp(error_log_file, "syslog") == 0) {
error_log_syslog = 1;
error_log_file = NULL;
}
else if(strcmp(error_log_file, "none") == 0) {
error_log_syslog = 0;
error_log_file = NULL;
// optimization - do not even generate debug log entries
}
else error_log_syslog = 0;
error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get("global", "errors flood protection period" , ""), 1);
error_log_errors_per_period = (unsigned long)config_get_number("global", "errors to trigger flood protection", error_log_errors_per_period);
setenv("NETDATA_ERRORS_PER_PERIOD" , config_get("global", "errors to trigger flood protection", ""), 1);
// --------------------------------------------------------------------
access_log_file = config_get("global", "access log", LOG_DIR "/access.log");
if(strcmp(access_log_file, "syslog") == 0) {
access_log_syslog = 1;
access_log_file = NULL;
}
else if(strcmp(access_log_file, "none") == 0) {
access_log_syslog = 0;
access_log_file = NULL;
}
else access_log_syslog = 0;
// --------------------------------------------------------------------
rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
// --------------------------------------------------------------------
{
char hostnamebuf[HOSTNAME_MAX + 1];
if(gethostname(hostnamebuf, HOSTNAME_MAX) == -1)
error("WARNING: Cannot get machine hostname.");
hostname = config_get("global", "hostname", hostnamebuf);
debug(D_OPTIONS, "hostname set to '%s'", hostname);
}
// --------------------------------------------------------------------
rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
info("Invalid save lines %d given. Defaulting to %d.", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
}
else {
debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
}
// --------------------------------------------------------------------
rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
if(rrd_update_every < 1 || rrd_update_every > 600) {
info("Invalid update timer %d given. Defaulting to %d.", rrd_update_every, UPDATE_EVERY_MAX);
rrd_update_every = UPDATE_EVERY;
}
else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
// let the plugins know the min update_every
{
char buf[16];
snprintfz(buf, 15, "%d", rrd_update_every);
setenv("NETDATA_UPDATE_EVERY", buf, 1);
}
// --------------------------------------------------------------------
// block signals while initializing threads.
// this causes the threads to block signals.
sigset_t sigset;
sigfillset(&sigset);
if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1) {
error("Could not block signals for threads");
}
// Catch signals which we want to use to quit savely
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGHUP);
sigaddset(&sa.sa_mask, SIGINT);
sigaddset(&sa.sa_mask, SIGTERM);
sa.sa_handler = sig_handler_exit;
sa.sa_flags = 0;
if(sigaction(SIGHUP, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGHUP");
}
if(sigaction(SIGINT, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGINT");
}
if(sigaction(SIGTERM, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGTERM");
}
// save database on SIGUSR1
sa.sa_handler = sig_handler_save;
if(sigaction(SIGUSR1, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGUSR1");
}
// Ignore SIGPIPE completely.
// INFO: If we add signals here we have to unblock them
// at popen.c when running a external plugin.
sa.sa_handler = SIG_IGN;
if(sigaction(SIGPIPE, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGPIPE");
}
// --------------------------------------------------------------------
i = pthread_attr_init(&attr);
if(i != 0)
fatal("pthread_attr_init() failed with code %d.", i);
i = pthread_attr_getstacksize(&attr, &stacksize);
if(i != 0)
fatal("pthread_attr_getstacksize() failed with code %d.", i);
else
debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
wanted_stacksize = config_get_number("global", "pthread stack size", stacksize);
// --------------------------------------------------------------------
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()
user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
// IMPORTANT: these have to run once, while single threaded
web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid()
web_files_gid();
// --------------------------------------------------------------------
create_listen_sockets();
}
// never become a problem
if(nice(20) == -1) error("Cannot lower my CPU priority.");
if(become_daemon(dont_fork, 0, user, input_log_file, output_log_file, error_log_file, access_log_file, &access_fd, &stdaccess) == -1)
fatal("Cannot demonize myself.");
#ifdef NETDATA_INTERNAL_CHECKS
if(debug_flags != 0) {
struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
if(setrlimit(RLIMIT_CORE, &rl) != 0)
info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
}
#endif /* NETDATA_INTERNAL_CHECKS */
if(output_log_syslog || error_log_syslog || access_log_syslog)
openlog("netdata", LOG_PID, LOG_DAEMON);
info("NetData started on pid %d", getpid());
// ------------------------------------------------------------------------
// get default pthread stack size
if(stacksize < wanted_stacksize) {
i = pthread_attr_setstacksize(&attr, wanted_stacksize);
if(i != 0)
fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
else
info("Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
}
// --------------------------------------------------------------------
// initialize the registry
registry_init();
// ------------------------------------------------------------------------
// spawn the threads
web_server_threading_selection();
for (i = 0; static_threads[i].name != NULL ; i++) {
struct netdata_static_thread *st = &static_threads[i];
if(st->enabled) {
st->thread = malloc(sizeof(pthread_t));
if(!st->thread)
fatal("Cannot allocate pthread_t memory");
info("Starting thread %s.", st->name);
if(pthread_create(st->thread, &attr, st->start_routine, NULL))
error("failed to create new thread for %s.", st->name);
else if(pthread_detach(*st->thread))
error("Cannot request detach of newly created %s thread.", st->name);
}
else info("Not starting thread %s.", st->name);
}
// ------------------------------------------------------------------------
// block signals while initializing threads.
sigset_t sigset;
sigfillset(&sigset);
if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
error("Could not unblock signals for threads");
}
// Handle flags set in the signal handler.
while(1) {
pause();
if(netdata_exit) {
info("Exit main loop of netdata.");
netdata_cleanup_and_exit(0);
exit(0);
}
}
}
int main(int argc, char **argv)
{
int i;
int config_loaded = 0;
int dont_fork = 0;
size_t wanted_stacksize = 0, stacksize = 0;
pthread_attr_t attr;
// global initialization
get_HZ();
// set the name for logging
program_name = "netdata";
// parse the arguments
for(i = 1; i < argc ; i++) {
if(strcmp(argv[i], "-c") == 0 && (i+1) < argc) {
if(load_config(argv[i+1], 1) != 1) {
error("Cannot load configuration file %s.", argv[i+1]);
exit(1);
}
else {
debug(D_OPTIONS, "Configuration loaded from %s.", argv[i+1]);
config_loaded = 1;
}
i++;
}
else if(strcmp(argv[i], "-df") == 0 && (i+1) < argc) { config_set("global", "debug flags", argv[i+1]); debug_flags = strtoull(argv[i+1], NULL, 0); i++; }
else if(strcmp(argv[i], "-p") == 0 && (i+1) < argc) { config_set("global", "port", argv[i+1]); i++; }
else if(strcmp(argv[i], "-u") == 0 && (i+1) < argc) { config_set("global", "run as user", argv[i+1]); i++; }
else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) { config_set("global", "history", argv[i+1]); i++; }
else if(strcmp(argv[i], "-t") == 0 && (i+1) < argc) { config_set("global", "update every", argv[i+1]); i++; }
else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) { config_set("global", "host access prefix", argv[i+1]); i++; }
else if(strcmp(argv[i], "-stacksize") == 0 && (i+1) < argc) { config_set("global", "pthread stack size", argv[i+1]); i++; }
else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) dont_fork = 1;
else if(strcmp(argv[i], "-pidfile") == 0 && (i+1) < argc) {
i++;
strncpy(pidfile, argv[i], FILENAME_MAX);
pidfile[FILENAME_MAX] = '\0';
}
else if(strcmp(argv[i], "--unittest") == 0) {
rrd_update_every = 1;
if(run_all_mockup_tests()) exit(1);
if(unit_test_storage()) exit(1);
fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
exit(0);
}
else {
fprintf(stderr, "Cannot understand option '%s'.\n", argv[i]);
fprintf(stderr, "\nUSAGE: %s [-d] [-l LINES_TO_SAVE] [-u UPDATE_TIMER] [-p LISTEN_PORT] [-df debug flags].\n\n", argv[0]);
fprintf(stderr, " -c CONFIG FILE the configuration file to load. Default: %s.\n", CONFIG_DIR "/" CONFIG_FILENAME);
fprintf(stderr, " -l LINES_TO_SAVE can be from 5 to %d lines in JSON data. Default: %d.\n", RRD_HISTORY_ENTRIES_MAX, RRD_DEFAULT_HISTORY_ENTRIES);
fprintf(stderr, " -t UPDATE_TIMER can be from 1 to %d seconds. Default: %d.\n", UPDATE_EVERY_MAX, UPDATE_EVERY);
fprintf(stderr, " -p LISTEN_PORT can be from 1 to %d. Default: %d.\n", 65535, LISTEN_PORT);
fprintf(stderr, " -u USERNAME can be any system username to run as. Default: none.\n");
fprintf(stderr, " -ch path to access host /proc and /sys when running in a container. Default: empty.\n");
fprintf(stderr, " -nd or -nodeamon to disable forking in the background. Default: unset.\n");
fprintf(stderr, " -df FLAGS debug options. Default: 0x%08llx.\n", debug_flags);
fprintf(stderr, " -stacksize BYTES to overwrite the pthread stack size.\n");
fprintf(stderr, " -pidfile FILENAME to save a pid while running.\n");
exit(1);
}
}
if(!config_loaded) load_config(NULL, 0);
// prepare configuration environment variables for the plugins
setenv("NETDATA_CONFIG_DIR" , config_get("global", "config directory" , CONFIG_DIR) , 1);
setenv("NETDATA_PLUGINS_DIR", config_get("global", "plugins directory" , PLUGINS_DIR), 1);
setenv("NETDATA_WEB_DIR" , config_get("global", "web files directory", WEB_DIR) , 1);
setenv("NETDATA_CACHE_DIR" , config_get("global", "cache directory" , CACHE_DIR) , 1);
setenv("NETDATA_LOG_DIR" , config_get("global", "log directory" , LOG_DIR) , 1);
setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
setenv("HOME" , config_get("global", "home directory" , CACHE_DIR) , 1);
// avoid extended to stat(/etc/localtime)
// http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
setenv("TZ", ":/etc/localtime", 0);
// cd to /tmp to avoid any plugins writing files at random places
if(chdir("/tmp")) error("netdata: ERROR: Cannot cd to /tmp");
char *input_log_file = NULL;
char *output_log_file = NULL;
char *error_log_file = NULL;
char *access_log_file = NULL;
char *user = NULL;
{
char buffer[1024];
// --------------------------------------------------------------------
sprintf(buffer, "0x%08llx", 0ULL);
char *flags = config_get("global", "debug flags", buffer);
setenv("NETDATA_DEBUG_FLAGS", flags, 1);
debug_flags = strtoull(flags, NULL, 0);
debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
if(debug_flags != 0) {
struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
if(setrlimit(RLIMIT_CORE, &rl) != 0)
info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
}
// --------------------------------------------------------------------
#ifdef MADV_MERGEABLE
enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
#else
#warning "Kernel memory deduplication (KSM) is not available"
#endif
// --------------------------------------------------------------------
global_host_prefix = config_get("global", "host access prefix", "");
setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
// --------------------------------------------------------------------
output_log_file = config_get("global", "debug log", LOG_DIR "/debug.log");
if(strcmp(output_log_file, "syslog") == 0) {
output_log_syslog = 1;
output_log_file = NULL;
}
else if(strcmp(output_log_file, "none") == 0) {
output_log_syslog = 0;
output_log_file = NULL;
}
else output_log_syslog = 0;
// --------------------------------------------------------------------
error_log_file = config_get("global", "error log", LOG_DIR "/error.log");
if(strcmp(error_log_file, "syslog") == 0) {
error_log_syslog = 1;
error_log_file = NULL;
}
else if(strcmp(error_log_file, "none") == 0) {
error_log_syslog = 0;
error_log_file = NULL;
// optimization - do not even generate debug log entries
}
else error_log_syslog = 0;
error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get("global", "errors flood protection period" , ""), 1);
error_log_errors_per_period = config_get_number("global", "errors to trigger flood protection", error_log_errors_per_period);
setenv("NETDATA_ERRORS_PER_PERIOD" , config_get("global", "errors to trigger flood protection", ""), 1);
// --------------------------------------------------------------------
access_log_file = config_get("global", "access log", LOG_DIR "/access.log");
if(strcmp(access_log_file, "syslog") == 0) {
access_log_syslog = 1;
access_log_file = NULL;
}
else if(strcmp(access_log_file, "none") == 0) {
access_log_syslog = 0;
access_log_file = NULL;
}
else access_log_syslog = 0;
// --------------------------------------------------------------------
rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
// --------------------------------------------------------------------
if(gethostname(buffer, HOSTNAME_MAX) == -1)
error("WARNING: Cannot get machine hostname.");
hostname = config_get("global", "hostname", buffer);
debug(D_OPTIONS, "hostname set to '%s'", hostname);
// --------------------------------------------------------------------
rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
info("Invalid save lines %d given. Defaulting to %d.", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
}
else {
debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
}
// --------------------------------------------------------------------
rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
if(rrd_update_every < 1 || rrd_update_every > 600) {
info("Invalid update timer %d given. Defaulting to %d.", rrd_update_every, UPDATE_EVERY_MAX);
rrd_update_every = UPDATE_EVERY;
}
else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
// let the plugins know the min update_every
{
char buf[50];
snprintf(buf, 50, "%d", rrd_update_every);
setenv("NETDATA_UPDATE_EVERY", buf, 1);
}
// --------------------------------------------------------------------
// block signals while initializing threads.
// this causes the threads to block signals.
sigset_t sigset;
sigfillset(&sigset);
if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1) {
error("Could not block signals for threads");
}
// Catch signals which we want to use to quit savely
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGHUP);
sigaddset(&sa.sa_mask, SIGINT);
sigaddset(&sa.sa_mask, SIGTERM);
sa.sa_handler = sig_handler;
sa.sa_flags = 0;
if(sigaction(SIGHUP, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGHUP");
}
if(sigaction(SIGINT, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGINT");
}
if(sigaction(SIGTERM, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGTERM");
}
// Ignore SIGPIPE completely.
// INFO: If we add signals here we have to unblock them
// at popen.c when running a external plugin.
sa.sa_handler = SIG_IGN;
if(sigaction(SIGPIPE, &sa, NULL) == -1) {
error("Failed to change signal handler for SIGTERM");
}
// --------------------------------------------------------------------
i = pthread_attr_init(&attr);
if(i != 0)
fatal("pthread_attr_init() failed with code %d.", i);
i = pthread_attr_getstacksize(&attr, &stacksize);
if(i != 0)
fatal("pthread_attr_getstacksize() failed with code %d.", i);
else
debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
wanted_stacksize = config_get_number("global", "pthread stack size", stacksize);
// --------------------------------------------------------------------
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()
user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
// IMPORTANT: these have to run once, while single threaded
web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid()
web_files_gid();
// --------------------------------------------------------------------
listen_backlog = (int) config_get_number("global", "http port listen backlog", LISTEN_BACKLOG);
listen_port = (int) config_get_number("global", "port", LISTEN_PORT);
if(listen_port < 1 || listen_port > 65535) {
info("Invalid listen port %d given. Defaulting to %d.", listen_port, LISTEN_PORT);
listen_port = LISTEN_PORT;
}
else debug(D_OPTIONS, "Listen port set to %d.", listen_port);
int ip = 0;
char *ipv = config_get("global", "ip version", "any");
if(!strcmp(ipv, "any") || !strcmp(ipv, "both") || !strcmp(ipv, "all")) ip = 0;
else if(!strcmp(ipv, "ipv4") || !strcmp(ipv, "IPV4") || !strcmp(ipv, "IPv4") || !strcmp(ipv, "4")) ip = 4;
else if(!strcmp(ipv, "ipv6") || !strcmp(ipv, "IPV6") || !strcmp(ipv, "IPv6") || !strcmp(ipv, "6")) ip = 6;
else info("Cannot understand ip version '%s'. Assuming 'any'.", ipv);
if(ip == 0 || ip == 6) listen_fd = create_listen_socket6(config_get("global", "bind socket to IP", "*"), listen_port, listen_backlog);
if(listen_fd < 0) {
listen_fd = create_listen_socket4(config_get("global", "bind socket to IP", "*"), listen_port, listen_backlog);
if(listen_fd >= 0 && ip != 4) info("Managed to open an IPv4 socket on port %d.", listen_port);
}
if(listen_fd < 0) fatal("Cannot listen socket.");
}
// never become a problem
if(nice(20) == -1) error("Cannot lower my CPU priority.");
if(become_daemon(dont_fork, 0, user, input_log_file, output_log_file, error_log_file, access_log_file, &access_fd, &stdaccess) == -1) {
fatal("Cannot demonize myself.");
exit(1);
}
if(debug_flags != 0) {
struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
if(setrlimit(RLIMIT_CORE, &rl) != 0)
info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
}
if(output_log_syslog || error_log_syslog || access_log_syslog)
openlog("netdata", LOG_PID, LOG_DAEMON);
info("NetData started on pid %d", getpid());
// ------------------------------------------------------------------------
// get default pthread stack size
if(stacksize < wanted_stacksize) {
i = pthread_attr_setstacksize(&attr, wanted_stacksize);
if(i != 0)
fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
else
info("Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
}
// ------------------------------------------------------------------------
// spawn the threads
for (i = 0; static_threads[i].name != NULL ; i++) {
struct netdata_static_thread *st = &static_threads[i];
if(st->enabled) {
st->thread = malloc(sizeof(pthread_t));
if(!st->thread)
fatal("Cannot allocate pthread_t memory");
info("Starting thread %s.", st->name);
if(pthread_create(st->thread, &attr, st->start_routine, NULL))
error("failed to create new thread for %s.", st->name);
else if(pthread_detach(*st->thread))
error("Cannot request detach of newly created %s thread.", st->name);
}
else info("Not starting thread %s.", st->name);
}
// ------------------------------------------------------------------------
// block signals while initializing threads.
sigset_t sigset;
sigfillset(&sigset);
if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
error("Could not unblock signals for threads");
}
// Handle flags set in the signal handler.
while(1) {
pause();
if(netdata_exit) {
info("Exit main loop of netdata.");
netdata_cleanup_and_exit(0);
exit(0);
}
}
}
int main(int argc, char **argv)
{
int i;
int config_loaded = 0;
int dont_fork = 0;
// global initialization
get_HZ();
// set the name for logging
program_name = "netdata";
// parse the arguments
for(i = 1; i < argc ; i++) {
if(strcmp(argv[i], "-c") == 0 && (i+1) < argc) {
if(load_config(argv[i+1], 1) != 1) {
error("Cannot load configuration file %s.", argv[i+1]);
exit(1);
}
else {
debug(D_OPTIONS, "Configuration loaded from %s.", argv[i+1]);
config_loaded = 1;
}
i++;
}
else if(strcmp(argv[i], "-df") == 0 && (i+1) < argc) { config_set("global", "debug flags", argv[i+1]); debug_flags = strtoull(argv[i+1], NULL, 0); i++; }
else if(strcmp(argv[i], "-p") == 0 && (i+1) < argc) { config_set("global", "port", argv[i+1]); i++; }
else if(strcmp(argv[i], "-u") == 0 && (i+1) < argc) { config_set("global", "run as user", argv[i+1]); i++; }
else if(strcmp(argv[i], "-l") == 0 && (i+1) < argc) { config_set("global", "history", argv[i+1]); i++; }
else if(strcmp(argv[i], "-t") == 0 && (i+1) < argc) { config_set("global", "update every", argv[i+1]); i++; }
else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) { config_set("global", "host access prefix", argv[i+1]); i++; }
else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) dont_fork = 1;
else if(strcmp(argv[i], "--unittest") == 0) {
rrd_update_every = 1;
if(run_all_mockup_tests()) exit(1);
if(unit_test_storage()) exit(1);
fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
exit(0);
}
else {
fprintf(stderr, "Cannot understand option '%s'.\n", argv[i]);
fprintf(stderr, "\nUSAGE: %s [-d] [-l LINES_TO_SAVE] [-u UPDATE_TIMER] [-p LISTEN_PORT] [-df debug flags].\n\n", argv[0]);
fprintf(stderr, " -c CONFIG FILE the configuration file to load. Default: %s.\n", CONFIG_DIR "/" CONFIG_FILENAME);
fprintf(stderr, " -l LINES_TO_SAVE can be from 5 to %d lines in JSON data. Default: %d.\n", RRD_HISTORY_ENTRIES_MAX, RRD_DEFAULT_HISTORY_ENTRIES);
fprintf(stderr, " -t UPDATE_TIMER can be from 1 to %d seconds. Default: %d.\n", UPDATE_EVERY_MAX, UPDATE_EVERY);
fprintf(stderr, " -p LISTEN_PORT can be from 1 to %d. Default: %d.\n", 65535, LISTEN_PORT);
fprintf(stderr, " -u USERNAME can be any system username to run as. Default: none.\n");
fprintf(stderr, " -ch path to access host /proc and /sys when running in a container. Default: empty.\n");
fprintf(stderr, " -nd or -nodeamon to disable forking in the background. Default: unset.\n");
fprintf(stderr, " -df FLAGS debug options. Default: 0x%08llx.\n", debug_flags);
exit(1);
}
}
if(!config_loaded) load_config(NULL, 0);
// prepare configuration environment variables for the plugins
setenv("NETDATA_CONFIG_DIR" , config_get("global", "config directory" , CONFIG_DIR) , 1);
setenv("NETDATA_PLUGINS_DIR", config_get("global", "plugins directory" , PLUGINS_DIR), 1);
setenv("NETDATA_WEB_DIR" , config_get("global", "web files directory", WEB_DIR) , 1);
setenv("NETDATA_CACHE_DIR" , config_get("global", "cache directory" , CACHE_DIR) , 1);
setenv("NETDATA_LOG_DIR" , config_get("global", "log directory" , LOG_DIR) , 1);
setenv("NETDATA_HOST_PREFIX", config_get("global", "host access prefix" , "") , 1);
// avoid extended to stat(/etc/localtime)
// http://stackoverflow.com/questions/4554271/how-to-avoid-excessive-stat-etc-localtime-calls-in-strftime-on-linux
setenv("TZ", ":/etc/localtime", 0);
// cd to /tmp to avoid any plugins writing files at random places
if(chdir("/tmp")) error("netdata: ERROR: Cannot cd to /tmp");
char *input_log_file = NULL;
char *output_log_file = NULL;
char *error_log_file = NULL;
char *access_log_file = NULL;
char *user = NULL;
{
char buffer[1024];
// --------------------------------------------------------------------
sprintf(buffer, "0x%08llx", 0ULL);
char *flags = config_get("global", "debug flags", buffer);
setenv("NETDATA_DEBUG_FLAGS", flags, 1);
debug_flags = strtoull(flags, NULL, 0);
debug(D_OPTIONS, "Debug flags set to '0x%8llx'.", debug_flags);
if(debug_flags != 0) {
struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
if(setrlimit(RLIMIT_CORE, &rl) != 0)
info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
}
// --------------------------------------------------------------------
#ifdef MADV_MERGEABLE
enable_ksm = config_get_boolean("global", "memory deduplication (ksm)", enable_ksm);
#else
#warning "Kernel memory deduplication (KSM) is not available"
#endif
// --------------------------------------------------------------------
global_host_prefix = config_get("global", "host access prefix", "");
setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
// --------------------------------------------------------------------
output_log_file = config_get("global", "debug log", LOG_DIR "/debug.log");
if(strcmp(output_log_file, "syslog") == 0) {
output_log_syslog = 1;
output_log_file = NULL;
}
else if(strcmp(output_log_file, "none") == 0) {
output_log_syslog = 0;
output_log_file = NULL;
}
else output_log_syslog = 0;
// --------------------------------------------------------------------
error_log_file = config_get("global", "error log", LOG_DIR "/error.log");
if(strcmp(error_log_file, "syslog") == 0) {
error_log_syslog = 1;
error_log_file = NULL;
}
else if(strcmp(error_log_file, "none") == 0) {
error_log_syslog = 0;
error_log_file = NULL;
// optimization - do not even generate debug log entries
}
else error_log_syslog = 0;
// --------------------------------------------------------------------
access_log_file = config_get("global", "access log", LOG_DIR "/access.log");
if(strcmp(access_log_file, "syslog") == 0) {
access_log_syslog = 1;
access_log_file = NULL;
}
else if(strcmp(access_log_file, "none") == 0) {
access_log_syslog = 0;
access_log_file = NULL;
}
else access_log_syslog = 0;
// --------------------------------------------------------------------
rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
// --------------------------------------------------------------------
if(gethostname(buffer, HOSTNAME_MAX) == -1)
error("WARNING: Cannot get machine hostname.");
hostname = config_get("global", "hostname", buffer);
debug(D_OPTIONS, "hostname set to '%s'", hostname);
// --------------------------------------------------------------------
rrd_default_history_entries = (int) config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
if(rrd_default_history_entries < 5 || rrd_default_history_entries > RRD_HISTORY_ENTRIES_MAX) {
fprintf(stderr, "Invalid save lines %d given. Defaulting to %d.\n", rrd_default_history_entries, RRD_DEFAULT_HISTORY_ENTRIES);
rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
}
else {
debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
}
// --------------------------------------------------------------------
rrd_update_every = (int) config_get_number("global", "update every", UPDATE_EVERY);
if(rrd_update_every < 1 || rrd_update_every > 600) {
fprintf(stderr, "Invalid update timer %d given. Defaulting to %d.\n", rrd_update_every, UPDATE_EVERY_MAX);
rrd_update_every = UPDATE_EVERY;
}
else debug(D_OPTIONS, "update timer set to %d.", rrd_update_every);
// let the plugins know the min update_every
{
char buf[50];
snprintf(buf, 50, "%d", rrd_update_every);
setenv("NETDATA_UPDATE_EVERY", buf, 1);
}
// --------------------------------------------------------------------
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();
}
// --------------------------------------------------------------------
prepare_rundir();
user = config_get("global", "run as user" , (getuid() == 0)?NETDATA_USER:"");
web_files_uid();
// --------------------------------------------------------------------
listen_backlog = (int) config_get_number("global", "http port listen backlog", LISTEN_BACKLOG);
listen_port = (int) config_get_number("global", "port", LISTEN_PORT);
if(listen_port < 1 || listen_port > 65535) {
fprintf(stderr, "Invalid listen port %d given. Defaulting to %d.\n", listen_port, LISTEN_PORT);
listen_port = LISTEN_PORT;
}
else debug(D_OPTIONS, "Listen port set to %d.", listen_port);
int ip = 0;
char *ipv = config_get("global", "ip version", "any");
if(!strcmp(ipv, "any") || !strcmp(ipv, "both") || !strcmp(ipv, "all")) ip = 0;
else if(!strcmp(ipv, "ipv4") || !strcmp(ipv, "IPV4") || !strcmp(ipv, "IPv4") || !strcmp(ipv, "4")) ip = 4;
else if(!strcmp(ipv, "ipv6") || !strcmp(ipv, "IPV6") || !strcmp(ipv, "IPv6") || !strcmp(ipv, "6")) ip = 6;
else fprintf(stderr, "Cannot understand ip version '%s'. Assumming 'any'.", ipv);
if(ip == 0 || ip == 6) listen_fd = create_listen_socket6(listen_port, listen_backlog);
if(listen_fd < 0) {
listen_fd = create_listen_socket4(listen_port, listen_backlog);
if(listen_fd >= 0 && ip != 4) fprintf(stderr, "Managed to open an IPv4 socket on port %d.", listen_port);
}
if(listen_fd < 0) fatal("Cannot listen socket.");
}
// never become a problem
if(nice(20) == -1) error("Cannot lower my CPU priority.");
if(become_daemon(dont_fork, 0, user, input_log_file, output_log_file, error_log_file, access_log_file, &access_fd, &stdaccess) == -1) {
fatal("Cannot demonize myself.");
exit(1);
}
if(debug_flags != 0) {
struct rlimit rl = { RLIM_INFINITY, RLIM_INFINITY };
if(setrlimit(RLIMIT_CORE, &rl) != 0)
info("Cannot request unlimited core dumps for debugging... Proceeding anyway...");
prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
}
if(output_log_syslog || error_log_syslog || access_log_syslog)
openlog("netdata", LOG_PID, LOG_DAEMON);
info("NetData started on pid %d", getpid());
// catch all signals
for (i = 1 ; i < 65 ;i++) {
switch(i) {
case SIGKILL: // not catchable
case SIGSTOP: // not catchable
break;
case SIGSEGV:
case SIGFPE:
case SIGCHLD:
signal(i, SIG_DFL);
break;
default:
signal(i, sig_handler);
break;
}
}
for (i = 0; static_threads[i].name != NULL ; i++) {
struct netdata_static_thread *st = &static_threads[i];
if(st->enabled) {
st->thread = malloc(sizeof(pthread_t));
if(!st->thread)
fatal("Cannot allocate pthread_t memory");
info("Starting thread %s.", st->name);
if(pthread_create(st->thread, NULL, st->start_routine, NULL))
error("failed to create new thread for %s.", st->name);
else if(pthread_detach(*st->thread))
error("Cannot request detach of newly created %s thread.", st->name);
}
else info("Not starting thread %s.", st->name);
}
// for future use - the main thread
while(1) {
if(netdata_exit != 0) {
netdata_exit++;
if(netdata_exit > 5) {
netdata_cleanup_and_exit(0);
exit(0);
}
}
sleep(2);
}
exit(0);
}
RRDHOST *rrdhost_create(const char *hostname,
const char *guid,
const char *os,
int update_every,
long entries,
RRD_MEMORY_MODE memory_mode,
int health_enabled,
int rrdpush_enabled,
char *rrdpush_destination,
char *rrdpush_api_key,
int is_localhost
) {
debug(D_RRDHOST, "Host '%s': adding with guid '%s'", hostname, guid);
rrd_check_wrlock();
RRDHOST *host = callocz(1, sizeof(RRDHOST));
host->rrd_update_every = (update_every > 0)?update_every:1;
host->rrd_history_entries = align_entries_to_pagesize(memory_mode, entries);
host->rrd_memory_mode = memory_mode;
host->health_enabled = (memory_mode == RRD_MEMORY_MODE_NONE)? 0 : health_enabled;
host->rrdpush_enabled = (rrdpush_enabled && rrdpush_destination && *rrdpush_destination && rrdpush_api_key && *rrdpush_api_key);
host->rrdpush_destination = (host->rrdpush_enabled)?strdupz(rrdpush_destination):NULL;
host->rrdpush_api_key = (host->rrdpush_enabled)?strdupz(rrdpush_api_key):NULL;
host->rrdpush_pipe[0] = -1;
host->rrdpush_pipe[1] = -1;
host->rrdpush_socket = -1;
netdata_mutex_init(&host->rrdpush_mutex);
netdata_rwlock_init(&host->rrdhost_rwlock);
rrdhost_init_hostname(host, hostname);
rrdhost_init_machine_guid(host, guid);
rrdhost_init_os(host, os);
avl_init_lock(&(host->rrdset_root_index), rrdset_compare);
avl_init_lock(&(host->rrdset_root_index_name), rrdset_compare_name);
avl_init_lock(&(host->rrdfamily_root_index), rrdfamily_compare);
avl_init_lock(&(host->variables_root_index), rrdvar_compare);
if(config_get_boolean(CONFIG_SECTION_GLOBAL, "delete obsolete charts files", 1))
rrdhost_flag_set(host, RRDHOST_DELETE_OBSOLETE_FILES);
if(config_get_boolean(CONFIG_SECTION_GLOBAL, "delete orphan hosts files", 1) && !is_localhost)
rrdhost_flag_set(host, RRDHOST_DELETE_ORPHAN_FILES);
// ------------------------------------------------------------------------
// initialize health variables
host->health_log.next_log_id = 1;
host->health_log.next_alarm_id = 1;
host->health_log.max = 1000;
host->health_log.next_log_id =
host->health_log.next_alarm_id = (uint32_t)now_realtime_sec();
long n = config_get_number(CONFIG_SECTION_HEALTH, "in memory max health log entries", host->health_log.max);
if(n < 10) {
error("Host '%s': health configuration has invalid max log entries %ld. Using default %u", host->hostname, n, host->health_log.max);
config_set_number(CONFIG_SECTION_HEALTH, "in memory max health log entries", (long)host->health_log.max);
}
else
host->health_log.max = (unsigned int)n;
netdata_rwlock_init(&host->health_log.alarm_log_rwlock);
char filename[FILENAME_MAX + 1];
if(is_localhost) {
host->cache_dir = strdupz(netdata_configured_cache_dir);
host->varlib_dir = strdupz(netdata_configured_varlib_dir);
}
else {
// this is not localhost - append our GUID to localhost path
snprintfz(filename, FILENAME_MAX, "%s/%s", netdata_configured_cache_dir, host->machine_guid);
host->cache_dir = strdupz(filename);
if(host->rrd_memory_mode == RRD_MEMORY_MODE_MAP || host->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
int r = mkdir(host->cache_dir, 0775);
if(r != 0 && errno != EEXIST)
error("Host '%s': cannot create directory '%s'", host->hostname, host->cache_dir);
}
snprintfz(filename, FILENAME_MAX, "%s/%s", netdata_configured_varlib_dir, host->machine_guid);
host->varlib_dir = strdupz(filename);
if(host->health_enabled) {
int r = mkdir(host->varlib_dir, 0775);
if(r != 0 && errno != EEXIST)
error("Host '%s': cannot create directory '%s'", host->hostname, host->varlib_dir);
}
}
if(host->health_enabled) {
snprintfz(filename, FILENAME_MAX, "%s/health", host->varlib_dir);
int r = mkdir(filename, 0775);
if(r != 0 && errno != EEXIST)
error("Host '%s': cannot create directory '%s'", host->hostname, filename);
}
snprintfz(filename, FILENAME_MAX, "%s/health/health-log.db", host->varlib_dir);
host->health_log_filename = strdupz(filename);
snprintfz(filename, FILENAME_MAX, "%s/alarm-notify.sh", netdata_configured_plugins_dir);
host->health_default_exec = strdupz(config_get(CONFIG_SECTION_HEALTH, "script to execute on alarm", filename));
host->health_default_recipient = strdup("root");
// ------------------------------------------------------------------------
// load health configuration
if(host->health_enabled) {
health_alarm_log_load(host);
health_alarm_log_open(host);
rrdhost_wrlock(host);
health_readdir(host, health_config_dir());
rrdhost_unlock(host);
}
// ------------------------------------------------------------------------
// link it and add it to the index
if(is_localhost) {
host->next = localhost;
localhost = host;
}
else {
if(localhost) {
host->next = localhost->next;
localhost->next = host;
}
else localhost = host;
}
RRDHOST *t = rrdhost_index_add(host);
if(t != host) {
error("Host '%s': cannot add host with machine guid '%s' to index. It already exists as host '%s' with machine guid '%s'.", host->hostname, host->machine_guid, t->hostname, t->machine_guid);
rrdhost_free(host);
host = NULL;
}
else {
info("Host '%s' with guid '%s' initialized"
", os %s"
", update every %d"
", memory mode %s"
", history entries %ld"
", streaming %s"
" (to '%s' with api key '%s')"
", health %s"
", cache_dir '%s'"
", varlib_dir '%s'"
", health_log '%s'"
", alarms default handler '%s'"
", alarms default recipient '%s'"
, host->hostname
, host->machine_guid
, host->os
, host->rrd_update_every
, rrd_memory_mode_name(host->rrd_memory_mode)
, host->rrd_history_entries
, host->rrdpush_enabled?"enabled":"disabled"
, host->rrdpush_destination?host->rrdpush_destination:""
, host->rrdpush_api_key?host->rrdpush_api_key:""
, host->health_enabled?"enabled":"disabled"
, host->cache_dir
, host->varlib_dir
, host->health_log_filename
, host->health_default_exec
, host->health_default_recipient
);
}
rrd_hosts_available++;
return host;
}
RRDHOST *rrdhost_find_or_create(
const char *hostname
, const char *guid
, const char *os
, int update_every
, long history
, RRD_MEMORY_MODE mode
, int health_enabled
, int rrdpush_enabled
, char *rrdpush_destination
, char *rrdpush_api_key
) {
debug(D_RRDHOST, "Searching for host '%s' with guid '%s'", hostname, guid);
rrd_wrlock();
RRDHOST *host = rrdhost_find_by_guid(guid, 0);
if(!host) {
host = rrdhost_create(
hostname
, guid
, os
, update_every
, history
, mode
, health_enabled
, rrdpush_enabled
, rrdpush_destination
, rrdpush_api_key
, 0
);
}
else {
host->health_enabled = health_enabled;
if(strcmp(host->hostname, hostname)) {
char *t = host->hostname;
host->hostname = strdupz(hostname);
host->hash_hostname = simple_hash(host->hostname);
freez(t);
}
if(host->rrd_update_every != update_every)
error("Host '%s' has an update frequency of %d seconds, but the wanted one is %d seconds.", host->hostname, host->rrd_update_every, update_every);
if(host->rrd_history_entries != history)
error("Host '%s' has history of %ld entries, but the wanted one is %ld entries.", host->hostname, host->rrd_history_entries, history);
if(host->rrd_memory_mode != mode)
error("Host '%s' has memory mode '%s', but the wanted one is '%s'.", host->hostname, rrd_memory_mode_name(host->rrd_memory_mode), rrd_memory_mode_name(mode));
}
rrd_unlock();
rrdhost_cleanup_orphan(host);
return host;
}
inline int backends_can_send_rrdset(uint32_t options, RRDSET *st) {
RRDHOST *host = st->rrdhost;
if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_BACKEND_IGNORE)))
return 0;
if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_BACKEND_SEND))) {
// we have not checked this chart
if(simple_pattern_matches(charts_pattern, st->id) || simple_pattern_matches(charts_pattern, st->name))
rrdset_flag_set(st, RRDSET_FLAG_BACKEND_SEND);
else {
rrdset_flag_set(st, RRDSET_FLAG_BACKEND_IGNORE);
debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s', because it is disabled for backends.", st->id, host->hostname);
return 0;
}
}
if(unlikely(!rrdset_is_available_for_backends(st))) {
debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s', because it is not available for backends.", st->id, host->hostname);
return 0;
}
if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE && !((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED))) {
debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s' because its memory mode is '%s' and the backend requires database access.", st->id, host->hostname, rrd_memory_mode_name(host->rrd_memory_mode));
return 0;
}
return 1;
}
