+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <errno.h>
+#include <getopt.h>
+#include <pthread.h>
+#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <syslog.h>
-#include <pthread.h>
#include <string.h>
-#include <errno.h>
-#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/prctl.h>
#include <sys/wait.h>
+#include <syslog.h>
+#include <unistd.h>
-#include "log.h"
+#include "appconfig.h"
+#include "common.h"
#include "daemon.h"
-#include "web_server.h"
+#include "log.h"
#include "popen.h"
-#include "config.h"
-#include "web_client.h"
#include "rrd.h"
#include "rrd2json.h"
+#include "web_client.h"
+#include "web_server.h"
#include "unit_test.h"
-#include "plugins_d.h"
-#include "plugin_idlejitter.h"
-#include "plugin_tc.h"
#include "plugin_checks.h"
-#include "plugin_proc.h"
+#include "plugin_idlejitter.h"
#include "plugin_nfacct.h"
+#include "registry.h"
+#include "plugin_proc.h"
+#include "plugin_tc.h"
+#include "plugins_d.h"
#include "main.h"
+extern void *cgroups_main(void *ptr);
+
+volatile sig_atomic_t netdata_exit = 0;
+
+void netdata_cleanup_and_exit(int ret)
+{
+ netdata_exit = 1;
+ rrdset_save_all();
+ // kill_childs();
+
+ // let it log a few more error messages
+ error_log_limit_reset();
+
+ if(pidfile[0]) {
+ if(unlink(pidfile) != 0)
+ error("Cannot unlink pidfile '%s'.", pidfile);
+ }
+
+ info("NetData exiting. Bye bye...");
+ exit(ret);
+}
+
struct netdata_static_thread {
char *name;
void (*init_routine) (void);
void *(*start_routine) (void *);
-};
-
-struct netdata_static_thread static_threads[] = {
- {"tc", "plugins", "tc", 1, NULL, NULL, tc_main},
- {"idlejitter", "plugins", "idlejitter", 1, NULL, NULL, cpuidlejitter_main},
- {"proc", "plugins", "proc", 1, NULL, NULL, proc_main},
-
+} static_threads[] = {
#ifdef INTERNAL_PLUGIN_NFACCT
- // nfacct requires root access
+// nfacct requires root access
// so, we build it as an external plugin with setuid to root
- {"nfacct", "plugins", "nfacct", 1, NULL, NULL, nfacct_main},
+ {"nfacct", "plugins", "nfacct", 1, NULL, NULL, nfacct_main},
#endif
- {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main},
- {"check", "plugins", "checks", 0, NULL, NULL, checks_main},
- {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main},
- {NULL, NULL, NULL, 0, NULL, NULL, NULL}
+ {"tc", "plugins", "tc", 1, NULL, NULL, tc_main},
+ {"idlejitter", "plugins", "idlejitter", 1, NULL, NULL, cpuidlejitter_main},
+ {"proc", "plugins", "proc", 1, NULL, NULL, proc_main},
+ {"cgroups", "plugins", "cgroups", 1, NULL, NULL, cgroups_main},
+ {"plugins.d", NULL, NULL, 1, NULL, NULL, pluginsd_main},
+ {"check", "plugins", "checks", 0, NULL, NULL, checks_main},
+ {"web", NULL, NULL, 1, NULL, NULL, socket_listen_main_multi_threaded},
+ {"web-single-threaded", NULL, NULL, 0, NULL, NULL, socket_listen_main_single_threaded},
+ {NULL, NULL, NULL, 0, NULL, NULL, NULL}
};
+void web_server_threading_selection(void) {
+ int threaded = config_get_boolean("global", "multi threaded web server", 1);
+
+ int i;
+ for(i = 0; static_threads[i].name ; i++) {
+ if(static_threads[i].start_routine == socket_listen_main_multi_threaded)
+ static_threads[i].enabled = threaded?1:0;
+
+ if(static_threads[i].start_routine == socket_listen_main_single_threaded)
+ static_threads[i].enabled = threaded?0:1;
+ }
+
+ web_client_timeout = (int) config_get_number("global", "disconnect idle web clients after seconds", DEFAULT_DISCONNECT_IDLE_WEB_CLIENTS_AFTER_SECONDS);
+
+#ifdef NETDATA_WITH_ZLIB
+ web_enable_gzip = config_get_boolean("global", "enable web responses gzip compression", web_enable_gzip);
+
+ char *s = config_get("global", "web 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'.");
+ web_gzip_strategy = Z_DEFAULT_STRATEGY;
+ }
+
+ web_gzip_level = (int)config_get_number("global", "web 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 = 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 = 9;
+ }
+#endif /* NETDATA_WITH_ZLIB */
+}
+
+
+int killpid(pid_t pid, int sig)
+{
+ int ret = -1;
+ debug(D_EXIT, "Request to kill pid %d", pid);
+
+ errno = 0;
+ if(kill(pid, 0) == -1) {
+ switch(errno) {
+ case ESRCH:
+ error("Request to kill pid %d, but it is not running.", pid);
+ break;
+
+ case EPERM:
+ error("Request to kill pid %d, but I do not have enough permissions.", pid);
+ break;
+
+ default:
+ error("Request to kill pid %d, but I received an error.", pid);
+ break;
+ }
+ }
+ else {
+ errno = 0;
+ ret = kill(pid, sig);
+ if(ret == -1) {
+ switch(errno) {
+ case ESRCH:
+ error("Cannot kill pid %d, but it is not running.", pid);
+ break;
+
+ case EPERM:
+ error("Cannot kill pid %d, but I do not have enough permissions.", pid);
+ break;
+
+ default:
+ error("Cannot kill pid %d, but I received an error.", pid);
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+
void kill_childs()
{
siginfo_t info;
pthread_join(w->thread, NULL);
}
- int i;
+ int i;
for (i = 0; static_threads[i].name != NULL ; i++) {
if(static_threads[i].thread) {
debug(D_EXIT, "Stopping %s thread", static_threads[i].name);
}
if(tc_child_pid) {
- debug(D_EXIT, "Killing tc-qos-helper procees");
- kill(tc_child_pid, SIGTERM);
- waitid(tc_child_pid, 0, &info, WEXITED);
+ info("Killing tc-qos-helper procees");
+ if(killpid(tc_child_pid, SIGTERM) != -1)
+ waitid(P_PID, (id_t) tc_child_pid, &info, WEXITED);
}
tc_child_pid = 0;
if(cd->pid && !cd->obsolete) {
debug(D_EXIT, "killing %s plugin process", cd->id);
- kill(cd->pid, SIGTERM);
- waitid(cd->pid, 0, &info, WEXITED);
+ if(killpid(cd->pid, SIGTERM) != -1)
+ waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
}
}
+ // if, for any reason there is any child exited
+ // catch it here
+ waitid(P_PID, 0, &info, WEXITED|WNOHANG);
+
debug(D_EXIT, "All threads/childs stopped.");
}
+struct option_def options[] = {
+ // opt description arg name default value
+ {'c', "Load alternate configuration file", "config_file", CONFIG_DIR "/" CONFIG_FILENAME},
+ {'D', "Disable fork into background", NULL, NULL},
+ {'h', "Display help message", NULL, NULL},
+ {'P', "File to save a pid while running", "FILE", NULL},
+ {'i', "The IP address to listen to.", "address", "All addresses"},
+ {'p', "Port to listen. Can be from 1 to 65535.", "port_number", "19999"},
+ {'s', "Path to access host /proc and /sys when running in a container.", "PATH", NULL},
+ {'t', "The frequency in seconds, for data collection. \
+Same as 'update every' config file option.", "seconds", "1"},
+ {'u', "System username to run as.", "username", "netdata"},
+ {'v', "Version of the program", NULL, NULL},
+ {'W', "vendor options.", "stacksize=<size>|unittest|debug_flag", NULL},
+};
+
+void help(int exitcode) {
+ FILE *stream;
+ if(exitcode == 0)
+ stream = stdout;
+ else
+ stream = stderr;
+
+ int num_opts = sizeof(options) / sizeof(struct option_def);
+ int i;
+ int max_len_arg = 0;
+
+ // Compute maximum argument length
+ for( i = 0; i < num_opts; i++ ) {
+ if(options[i].arg_name) {
+ int len_arg = strlen(options[i].arg_name);
+ if(len_arg > max_len_arg) max_len_arg = len_arg;
+ }
+ }
+
+ fprintf(stream, "SYNOPSIS: netdata [options]\n");
+ fprintf(stream, "\n");
+ fprintf(stream, "Options:\n");
+
+ // Output options description.
+ for( i = 0; i < num_opts; i++ ) {
+ fprintf(stream, " -%c %-*s %s", options[i].val, max_len_arg, options[i].arg_name ? options[i].arg_name : "", options[i].description);
+ if(options[i].default_value) {
+ fprintf(stream, " Default: %s\n", options[i].default_value);
+ } else {
+ fprintf(stream, "\n");
+ }
+ }
+
+ fflush(stream);
+ exit(exitcode);
+}
+
+// TODO: Remove this function with the nix major release.
+void remove_option(int opt_index, int *argc, char **argv) {
+ int i = opt_index;
+ // 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);
+}
+
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) {
- fprintf(stderr, "Cannot load configuration file %s. Reason: %s\n", argv[i+1], strerror(errno));
- exit(1);
+ // 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: deprecate option -- %s -- please use -P instead.\n", argv[0], argv[i]);
+ remove_option(i, &argc, argv);
}
- else {
- debug(D_OPTIONS, "Configuration loaded from %s.", argv[i+1]);
- config_loaded = 1;
+ else if(strcmp(argv[i], "-nodaemon") == 0 || strcmp(argv[i], "-nd") == 0) {
+ dont_fork = 1;
+ fprintf(stderr, "%s: deprecate option -- %s -- please use -D instead.\n ", argv[0], argv[i]);
+ remove_option(i, &argc, argv);
}
- i++;
- }
- else if(strcmp(argv[i], "-df") == 0 && (i+1) < argc) { config_set("global", "debug flags", argv[i+1]); 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], "--unittest") == 0) {
- if(unit_test_storage()) exit(1);
- exit(0);
- rrd_update_every = 1;
- if(unit_test(1000000, 0)) exit(1);
- if(unit_test(1000000, 500000)) exit(1);
- if(unit_test(1000000, 100000)) exit(1);
- if(unit_test(1000000, 900000)) exit(1);
- if(unit_test(2000000, 0)) exit(1);
- if(unit_test(2000000, 500000)) exit(1);
- if(unit_test(2000000, 100000)) exit(1);
- if(unit_test(2000000, 900000)) exit(1);
- if(unit_test(500000, 500000)) exit(1);
- //if(unit_test(500000, 100000)) exit(1); // FIXME: the expected numbers are wrong
- //if(unit_test(500000, 900000)) exit(1); // FIXME: the expected numbers are wrong
- if(unit_test(500000, 0)) exit(1);
- fprintf(stderr, "\n\nALL TESTS PASSED\n\n");
- exit(0);
+ else if(strcmp(argv[i], "-ch") == 0 && (i+1) < argc) {
+ config_set("global", "host access prefix", argv[i+1]);
+ fprintf(stderr, "%s: deprecate 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: deprecate option -- %s -- This option will be rmoved with V2.*.\n", argv[0], argv[i]);
+ remove_option(i, &argc, argv);
+ }
+ else i++;
}
- 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] [-dl debug log file] [-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, " -df FLAGS debug options. Default: 0x%8llx.\n", debug_flags);
- exit(1);
+ }
+
+ // 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 socket to IP", optarg);
+ break;
+ case 'P':
+ strncpy(pidfile, optarg, FILENAME_MAX);
+ pidfile[FILENAME_MAX] = '\0';
+ break;
+ case 'p':
+ config_set("global", "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 1.1.0\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);
+
+ // 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");
// --------------------------------------------------------------------
- silent = 0;
error_log_file = config_get("global", "error log", LOG_DIR "/error.log");
if(strcmp(error_log_file, "syslog") == 0) {
error_log_syslog = 1;
else if(strcmp(error_log_file, "none") == 0) {
error_log_syslog = 0;
error_log_file = NULL;
- silent = 1; // optimization - do not even generate debug log entries
+ // 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");
// --------------------------------------------------------------------
- rrd_default_history_entries = config_get_number("global", "history", RRD_DEFAULT_HISTORY_ENTRIES);
+ 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);
+ 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 {
// --------------------------------------------------------------------
- rrd_update_every = config_get_number("global", "update every", UPDATE_EVERY);
+ 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);
+ 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[51];
+ snprintfz(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];
// --------------------------------------------------------------------
- prepare_rundir();
- char *user = config_get("global", "run as user", (getuid() == 0)?"nobody":"");
- if(*user) {
- if(become_user(user) != 0) {
- fprintf(stderr, "Cannot become user %s.\n", user);
- exit(1);
- }
- else debug(D_OPTIONS, "Successfully became user %s.", user);
- }
+ // 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_port = 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);
+ // --------------------------------------------------------------------
- listen_fd = create_listen_socket(listen_port);
+ listen_fd = create_listen_socket();
+ if(listen_fd < 0) fatal("Cannot listen socket.");
}
// never become a problem
- if(nice(20) == -1) {
- fprintf(stderr, "Cannot lower my CPU priority. Error: %s.\n", strerror(errno));
- }
+ 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.");
-#ifndef NETDATA_NO_DAEMON
- if(become_daemon(0, input_log_file, output_log_file, error_log_file, access_log_file, &access_fd, &stdaccess) == -1) {
- fprintf(stderr, "Cannot demonize myself (%s).", strerror(errno));
- exit(1);
+#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
+#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());
- // catch all signals
- for (i = 1 ; i < 65 ;i++) if(i != SIGSEGV && i != SIGFPE) signal(i, sig_handler);
-
+ // ------------------------------------------------------------------------
+ // 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, NULL, st->start_routine, NULL))
+ 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))
else info("Not starting thread %s.", st->name);
}
- // the main process - the web server listener
- // this never ends
- // socket_listen_main(NULL);
- while(1) process_childs(1);
+ // ------------------------------------------------------------------------
+ // block signals while initializing threads.
+ sigset_t sigset;
+ sigfillset(&sigset);
- exit(0);
+ 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);
+ }
+ }
}
projects / netdata.git / blobdiff