+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.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 <sys/prctl.h>
+#include "common.h"
#include "log.h"
#include "daemon.h"
#include "web_server.h"
#include "popen.h"
-#include "config.h"
+#include "appconfig.h"
#include "web_client.h"
#include "rrd.h"
#include "rrd2json.h"
#include "main.h"
+extern void *cgroups_main(void *ptr);
+
+int 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(pidfd != -1) {
+ if(ftruncate(pidfd, 0) != 0)
+ error("Cannot truncate pidfile '%s'.", pidfile);
+
+ close(pidfd);
+ pidfd = -1;
+ }
+
+ 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;
{"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},
#ifdef INTERNAL_PLUGIN_NFACCT
// nfacct requires root access
{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;
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.");
}
{
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));
+ error("Cannot load configuration file %s.", argv[i+1]);
exit(1);
}
else {
}
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], "-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);
- exit(0);
- 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 {
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, "\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", HISTORY_MAX, HISTORY);
+ 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);
+ 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);
+
+ // 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 = 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");
// --------------------------------------------------------------------
- memory_mode = memory_mode_id(config_get("global", "memory mode", memory_mode_name(memory_mode)));
+ rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
// --------------------------------------------------------------------
// --------------------------------------------------------------------
- save_history = config_get_number("global", "history", HISTORY);
- if(save_history < 5 || save_history > HISTORY_MAX) {
- fprintf(stderr, "Invalid save lines %d given. Defaulting to %d.\n", save_history, HISTORY);
- save_history = HISTORY;
+ 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.", save_history);
+ debug(D_OPTIONS, "save lines set to %d.", rrd_default_history_entries);
}
// --------------------------------------------------------------------
- update_every = config_get_number("global", "update every", UPDATE_EVERY);
- if(update_every < 1 || update_every > 600) {
- fprintf(stderr, "Invalid update timer %d given. Defaulting to %d.\n", update_every, UPDATE_EVERY_MAX);
- 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) {
+ 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);
}
- else debug(D_OPTIONS, "update timer set to %d.", update_every);
// --------------------------------------------------------------------
-
+
+ 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);
+ 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);
+ 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);
+ 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);
+ }
- listen_fd = create_listen_socket(listen_port);
+ 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(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));
+ 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);
// catch all signals
- for (i = 1 ; i < 65 ;i++) if(i != SIGSEGV && i != SIGFPE) signal(i, sig_handler);
-
+ 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;
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // 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");
- if(pthread_create(st->thread, NULL, st->start_routine, NULL))
+ 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);
}
- // the main process - the web server listener
- // this never ends
- // socket_listen_main(NULL);
- while(1) process_childs(1);
+ // 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);
}
projects / netdata.git / blobdiff