summaryrefslogtreecommitdiffstats
path: root/src/main.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rwxr-xr-xsrc/main.c479
1 files changed, 479 insertions, 0 deletions
diff --git a/src/main.c b/src/main.c
new file mode 100755
index 00000000..a2975735
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,479 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#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/wait.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/mman.h>
+
+#include "common.h"
+#include "log.h"
+#include "daemon.h"
+#include "web_server.h"
+#include "popen.h"
+#include "appconfig.h"
+#include "web_client.h"
+#include "rrd.h"
+#include "rrd2json.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_nfacct.h"
+
+#include "main.h"
+
+int netdata_exit = 0;
+
+void netdata_cleanup_and_exit(int ret)
+{
+ netdata_exit = 1;
+ rrdset_save_all();
+ // kill_childs();
+ unlink("/var/run/netdata.pid");
+ info("NetData exiting. Bye bye...");
+ exit(ret);
+}
+
+struct netdata_static_thread {
+ char *name;
+
+ char *config_section;
+ char *config_name;
+
+ int enabled;
+
+ pthread_t *thread;
+
+ 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},
+
+#ifdef INTERNAL_PLUGIN_NFACCT
+ // nfacct requires root access
+ // so, we build it as an external plugin with setuid to root
+ {"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}
+};
+
+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;
+
+ void (*old)(int);
+ old = signal(sig, SIG_IGN);
+ if(old == SIG_ERR) {
+ error("Cannot overwrite signal handler for signal %d", sig);
+ old = sig_handler;
+ }
+
+ ret = kill(pid, sig);
+
+ if(signal(sig, old) == SIG_ERR)
+ error("Cannot restore signal handler for signal %d", 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;
+
+ struct web_client *w;
+ for(w = web_clients; w ; w = w->next) {
+ debug(D_EXIT, "Stopping web client %s", w->client_ip);
+ pthread_cancel(w->thread);
+ pthread_join(w->thread, NULL);
+ }
+
+ 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);
+ pthread_cancel(*static_threads[i].thread);
+ pthread_join(*static_threads[i].thread, NULL);
+ static_threads[i].thread = NULL;
+ }
+ }
+
+ if(tc_child_pid) {
+ 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;
+
+ struct plugind *cd;
+ for(cd = pluginsd_root ; cd ; cd = cd->next) {
+ debug(D_EXIT, "Stopping %s plugin thread", cd->id);
+ pthread_cancel(cd->thread);
+ pthread_join(cd->thread, NULL);
+
+ if(cd->pid && !cd->obsolete) {
+ debug(D_EXIT, "killing %s plugin process", cd->id);
+ 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.");
+}
+
+
+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], "-nodeamon") == 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] [-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, " -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...");
+ }
+
+ // --------------------------------------------------------------------
+
+#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(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));
+
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 03:04:29 +0000