Imported Upstream version 1.0.0upstream/1.0.0

1 files changed, 479 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100755
index 000000000..a29757358
--- /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);
+}