src/rrdpush.c

   1 #include "common.h"
   2
   3 int default_rrdpush_enabled   = 0;
   4 int default_rrdpush_exclusive = 1;
   5
   6 static char *remote_netdata_config = NULL;
   7 static char *api_key = NULL;
   8
   9 #define CONNECTED_TO_SIZE 100
  10
  11 // data collection happens from multiple threads
  12 // each of these threads calls rrdset_done()
  13 // which in turn calls rrdset_done_push()
  14 // which uses this pipe to notify the streaming thread
  15 // that there are more data ready to be sent
  16 #define PIPE_READ 0
  17 #define PIPE_WRITE 1
  18
  19 // to have the remote netdata re-sync the charts
  20 // to its current clock, we send for this many
  21 // iterations a BEGIN line without microseconds
  22 // this is for the first iterations of each chart
  23 static unsigned int remote_clock_resync_iterations = 60;
  24
  25 #define rrdpush_lock(host) pthread_mutex_lock(&((host)->rrdpush_mutex))
  26 #define rrdpush_unlock(host) pthread_mutex_unlock(&((host)->rrdpush_mutex))
  27
  28 // checks if the current chart definition has been sent
  29 static inline int need_to_send_chart_definition(RRDSET *st) {
  30     RRDDIM *rd;
  31     rrddim_foreach_read(rd, st)
  32         if(!rrddim_flag_check(rd, RRDDIM_FLAG_EXPOSED))
  33             return 1;
  34
  35     return 0;
  36 }
  37
  38 // sends the current chart definition
  39 static inline void send_chart_definition(RRDSET *st) {
  40     buffer_sprintf(st->rrdhost->rrdpush_buffer, "CHART '%s' '%s' '%s' '%s' '%s' '%s' '%s' %ld %d\n"
  41                 , st->id
  42                 , st->name
  43                 , st->title
  44                 , st->units
  45                 , st->family
  46                 , st->context
  47                 , rrdset_type_name(st->chart_type)
  48                 , st->priority
  49                 , st->update_every
  50     );
  51
  52     RRDDIM *rd;
  53     rrddim_foreach_read(rd, st) {
  54         buffer_sprintf(st->rrdhost->rrdpush_buffer, "DIMENSION '%s' '%s' '%s' " COLLECTED_NUMBER_FORMAT " " COLLECTED_NUMBER_FORMAT " '%s %s'\n"
  55                        , rd->id
  56                        , rd->name
  57                        , rrd_algorithm_name(rd->algorithm)
  58                        , rd->multiplier
  59                        , rd->divisor
  60                        , rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)?"hidden":""
  61                        , rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)?"noreset":""
  62         );
  63         rrddim_flag_set(rd, RRDDIM_FLAG_EXPOSED);
  64     }
  65 }
  66
  67 // sends the current chart dimensions
  68 static inline void send_chart_metrics(RRDSET *st) {
  69     buffer_sprintf(st->rrdhost->rrdpush_buffer, "BEGIN %s %llu\n", st->id, (st->counter_done > remote_clock_resync_iterations)?st->usec_since_last_update:0);
  70
  71     RRDDIM *rd;
  72     rrddim_foreach_read(rd, st) {
  73         if(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED) && rrddim_flag_check(rd, RRDDIM_FLAG_EXPOSED))
  74             buffer_sprintf(st->rrdhost->rrdpush_buffer, "SET %s = " COLLECTED_NUMBER_FORMAT "\n"
  75                        , rd->id
  76                        , rd->collected_value
  77         );
  78     }
  79
  80     buffer_strcat(st->rrdhost->rrdpush_buffer, "END\n");
  81 }
  82
  83 // resets all the chart, so that their definitions
  84 // will be resent to the central netdata
  85 static void reset_all_charts(RRDHOST *host) {
  86     rrdhost_rdlock(host);
  87
  88     RRDSET *st;
  89     rrdset_foreach_read(st, host) {
  90
  91         // make it re-align the current time
  92         // on the remote host
  93         st->counter_done = 0;
  94
  95         rrdset_rdlock(st);
  96
  97         RRDDIM *rd;
  98         rrddim_foreach_read(rd, st)
  99             rrddim_flag_clear(rd, RRDDIM_FLAG_EXPOSED);
 100
 101         rrdset_unlock(st);
 102     }
 103
 104     rrdhost_unlock(host);
 105 }
 106
 107 void rrdpush_sender_thread_spawn(RRDHOST *host);
 108
 109 void rrdset_done_push(RRDSET *st) {
 110     RRDHOST *host = st->rrdhost;
 111
 112     if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_ENABLED)))
 113         return;
 114
 115     rrdpush_lock(host);
 116
 117     if(unlikely(host->rrdpush_enabled && !host->rrdpush_spawn))
 118         rrdpush_sender_thread_spawn(host);
 119
 120     if(unlikely(!host->rrdpush_buffer || !host->rrdpush_connected)) {
 121         if(unlikely(!host->rrdpush_error_shown))
 122             error("STREAM [send]: not ready - discarding collected metrics.");
 123
 124         host->rrdpush_error_shown = 1;
 125
 126         rrdpush_unlock(host);
 127         return;
 128     }
 129     else if(unlikely(host->rrdpush_error_shown)) {
 130         error("STREAM [send]: ready - sending metrics...");
 131         host->rrdpush_error_shown = 0;
 132     }
 133
 134     rrdset_rdlock(st);
 135     if(need_to_send_chart_definition(st))
 136         send_chart_definition(st);
 137
 138     send_chart_metrics(st);
 139     rrdset_unlock(st);
 140
 141     // signal the sender there are more data
 142     if(write(host->rrdpush_pipe[PIPE_WRITE], " ", 1) == -1)
 143         error("STREAM [send]: cannot write to internal pipe");
 144
 145     rrdpush_unlock(host);
 146 }
 147
 148 static inline void rrdpush_flush(RRDHOST *host) {
 149     rrdpush_lock(host);
 150     if(buffer_strlen(host->rrdpush_buffer))
 151         error("STREAM [send]: discarding %zu bytes of metrics already in the buffer.", buffer_strlen(host->rrdpush_buffer));
 152
 153     buffer_flush(host->rrdpush_buffer);
 154     reset_all_charts(host);
 155     rrdpush_unlock(host);
 156 }
 157
 158 int rrdpush_init() {
 159     default_rrdpush_enabled = config_get_boolean("stream", "enabled", default_rrdpush_enabled);
 160     default_rrdpush_exclusive = config_get_boolean("stream", "exclusive", default_rrdpush_exclusive);
 161     remote_netdata_config = config_get("stream", "stream metrics to", "");
 162     api_key = config_get("stream", "api key", "");
 163
 164     if(!default_rrdpush_enabled || !remote_netdata_config || !*remote_netdata_config || !api_key || !*api_key) {
 165         default_rrdpush_enabled = 0;
 166         default_rrdpush_exclusive = 0;
 167     }
 168
 169     return default_rrdpush_enabled;
 170 }
 171
 172 static inline void rrdpush_sender_lock(RRDHOST *host) {
 173     if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 174         error("STREAM [send]: cannot set pthread cancel state to DISABLE.");
 175
 176     rrdpush_lock(host);
 177 }
 178
 179 static inline void rrdpush_sender_unlock(RRDHOST *host) {
 180     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 181         error("STREAM [send]: cannot set pthread cancel state to DISABLE.");
 182
 183     rrdpush_unlock(host);
 184 }
 185
 186 void rrdpush_sender_cleanup(RRDHOST *host) {
 187     rrdpush_lock(host);
 188
 189     host->rrdpush_connected = 0;
 190
 191     if(host->rrdpush_socket != -1) close(host->rrdpush_socket);
 192
 193     // close the pipe
 194     if(host->rrdpush_pipe[PIPE_READ] != -1)  close(host->rrdpush_pipe[PIPE_READ]);
 195     if(host->rrdpush_pipe[PIPE_WRITE] != -1) close(host->rrdpush_pipe[PIPE_WRITE]);
 196     host->rrdpush_pipe[PIPE_READ] = -1;
 197     host->rrdpush_pipe[PIPE_WRITE] = -1;
 198
 199     buffer_free(host->rrdpush_buffer);
 200     host->rrdpush_buffer = NULL;
 201
 202     host->rrdpush_spawn = 0;
 203     host->rrdpush_enabled = 0;
 204
 205     rrdpush_unlock(host);
 206 }
 207
 208 void *rrdpush_sender_thread(void *ptr) {
 209     RRDHOST *host = (RRDHOST *)ptr;
 210
 211     info("STREAM [send]: thread created (task id %d)", gettid());
 212
 213     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 214         error("STREAM [send]: cannot set pthread cancel type to DEFERRED.");
 215
 216     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 217         error("STREAM [send]: cannot set pthread cancel state to ENABLE.");
 218
 219     int timeout = (int)config_get_number("stream", "timeout seconds", 60);
 220     int default_port = (int)config_get_number("stream", "default port", 19999);
 221     size_t max_size = (size_t)config_get_number("stream", "buffer size bytes", 1024 * 1024);
 222     unsigned int reconnect_delay = (unsigned int)config_get_number("stream", "reconnect delay seconds", 5);
 223     remote_clock_resync_iterations = (unsigned int)config_get_number("stream", "initial clock resync iterations", remote_clock_resync_iterations);
 224     char connected_to[CONNECTED_TO_SIZE + 1] = "";
 225
 226     if(!host->rrdpush_enabled || !remote_netdata_config || !*remote_netdata_config || !api_key || !*api_key)
 227         goto cleanup;
 228
 229     // initialize rrdpush globals
 230     host->rrdpush_buffer = buffer_create(1);
 231     host->rrdpush_connected = 0;
 232     if(pipe(host->rrdpush_pipe) == -1) fatal("STREAM [send]: cannot create required pipe.");
 233
 234     // initialize local variables
 235     size_t begin = 0;
 236     size_t reconnects_counter = 0;
 237     size_t sent_bytes = 0;
 238     size_t sent_connection = 0;
 239
 240     struct timeval tv = {
 241             .tv_sec = timeout,
 242             .tv_usec = 0
 243     };
 244
 245     struct pollfd fds[2], *ifd, *ofd;
 246     nfds_t fdmax;
 247
 248     ifd = &fds[0];
 249     ofd = &fds[1];
 250
 251     for(; host->rrdpush_enabled && !netdata_exit ;) {
 252
 253         if(unlikely(host->rrdpush_socket == -1)) {
 254             // stop appending data into rrdpush_buffer
 255             // they will be lost, so there is no point to do it
 256             host->rrdpush_connected = 0;
 257
 258             info("STREAM [send to %s]: connecting...", remote_netdata_config);
 259             host->rrdpush_socket = connect_to_one_of(remote_netdata_config, default_port, &tv, &reconnects_counter, connected_to, CONNECTED_TO_SIZE);
 260
 261             if(unlikely(host->rrdpush_socket == -1)) {
 262                 error("STREAM [send to %s]: failed to connect", remote_netdata_config);
 263                 sleep(reconnect_delay);
 264                 continue;
 265             }
 266
 267             info("STREAM [send to %s]: initializing communication...", connected_to);
 268
 269             char http[1000 + 1];
 270             snprintfz(http, 1000,
 271                     "STREAM key=%s&hostname=%s&machine_guid=%s&os=%s&update_every=%d HTTP/1.1\r\n"
 272                     "User-Agent: netdata-push-service/%s\r\n"
 273                     "Accept: */*\r\n\r\n"
 274                       , api_key
 275                       , localhost->hostname
 276                       , localhost->machine_guid
 277                       , localhost->os
 278                       , default_rrd_update_every
 279                       , program_version
 280             );
 281
 282             if(send_timeout(host->rrdpush_socket, http, strlen(http), 0, timeout) == -1) {
 283                 close(host->rrdpush_socket);
 284                 host->rrdpush_socket = -1;
 285                 error("STREAM [send to %s]: failed to send http header to netdata", connected_to);
 286                 sleep(reconnect_delay);
 287                 continue;
 288             }
 289
 290             info("STREAM [send to %s]: waiting response from remote netdata...", connected_to);
 291
 292             if(recv_timeout(host->rrdpush_socket, http, 1000, 0, timeout) == -1) {
 293                 close(host->rrdpush_socket);
 294                 host->rrdpush_socket = -1;
 295                 error("STREAM [send to %s]: failed to initialize communication", connected_to);
 296                 sleep(reconnect_delay);
 297                 continue;
 298             }
 299
 300             if(strncmp(http, "STREAM", 6)) {
 301                 close(host->rrdpush_socket);
 302                 host->rrdpush_socket = -1;
 303                 error("STREAM [send to %s]: server is not replying properly.", connected_to);
 304                 sleep(reconnect_delay);
 305                 continue;
 306             }
 307
 308             info("STREAM [send to %s]: established communication - sending metrics...", connected_to);
 309
 310             if(fcntl(host->rrdpush_socket, F_SETFL, O_NONBLOCK) < 0)
 311                 error("STREAM [send to %s]: cannot set non-blocking mode for socket.", connected_to);
 312
 313             rrdpush_flush(host);
 314             sent_connection = 0;
 315
 316             // allow appending data into rrdpush_buffer
 317             host->rrdpush_connected = 1;
 318         }
 319
 320         ifd->fd = host->rrdpush_pipe[PIPE_READ];
 321         ifd->events = POLLIN;
 322         ifd->revents = 0;
 323
 324         ofd->fd = host->rrdpush_socket;
 325         ofd->revents = 0;
 326         if(begin < buffer_strlen(host->rrdpush_buffer)) {
 327             ofd->events = POLLOUT;
 328             fdmax = 2;
 329         }
 330         else {
 331             ofd->events = 0;
 332             fdmax = 1;
 333         }
 334
 335         if(netdata_exit) break;
 336         int retval = poll(fds, fdmax, timeout * 1000);
 337         if(netdata_exit) break;
 338
 339         if(unlikely(retval == -1)) {
 340             if(errno == EAGAIN || errno == EINTR)
 341                 continue;
 342
 343             error("STREAM [send to %s]: failed to poll().", connected_to);
 344             close(host->rrdpush_socket);
 345             host->rrdpush_socket = -1;
 346             break;
 347         }
 348         else if(unlikely(!retval)) {
 349             // timeout
 350             continue;
 351         }
 352
 353         if(ifd->revents & POLLIN) {
 354             char buffer[1000 + 1];
 355             if(read(host->rrdpush_pipe[PIPE_READ], buffer, 1000) == -1)
 356                 error("STREAM [send to %s]: cannot read from internal pipe.", connected_to);
 357         }
 358
 359         if(ofd->revents & POLLOUT && begin < buffer_strlen(host->rrdpush_buffer)) {
 360             rrdpush_sender_lock(host);
 361             ssize_t ret = send(host->rrdpush_socket, &host->rrdpush_buffer->buffer[begin], buffer_strlen(host->rrdpush_buffer) - begin, MSG_DONTWAIT);
 362             if(ret == -1) {
 363                 if(errno != EAGAIN && errno != EINTR) {
 364                     error("STREAM [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", connected_to, sent_connection);
 365                     close(host->rrdpush_socket);
 366                     host->rrdpush_socket = -1;
 367                 }
 368             }
 369             else {
 370                 sent_connection += ret;
 371                 sent_bytes += ret;
 372                 begin += ret;
 373                 if(begin == buffer_strlen(host->rrdpush_buffer)) {
 374                     buffer_flush(host->rrdpush_buffer);
 375                     begin = 0;
 376                 }
 377             }
 378             rrdpush_sender_unlock(host);
 379         }
 380
 381         // protection from overflow
 382         if(host->rrdpush_buffer->len > max_size) {
 383             errno = 0;
 384             error("STREAM [send to %s]: too many data pending - buffer is %zu bytes long, %zu unsent - we have sent %zu bytes in total, %zu on this connection. Closing connection to flush the data.", connected_to, host->rrdpush_buffer->len, host->rrdpush_buffer->len - begin, sent_bytes, sent_connection);
 385             if(host->rrdpush_socket != -1) {
 386                 close(host->rrdpush_socket);
 387                 host->rrdpush_socket = -1;
 388             }
 389         }
 390     }
 391
 392 cleanup:
 393     debug(D_WEB_CLIENT, "STREAM [send]: sending thread exits.");
 394
 395     rrdpush_sender_cleanup(host);
 396
 397     pthread_exit(NULL);
 398     return NULL;
 399 }
 400
 401
 402 // ----------------------------------------------------------------------------
 403 // STREAM receiver
 404
 405 int rrdpush_receive(int fd, const char *key, const char *hostname, const char *machine_guid, const char *os, int update_every, char *client_ip, char *client_port) {
 406     RRDHOST *host;
 407     int history = default_rrd_history_entries;
 408     RRD_MEMORY_MODE mode = default_rrd_memory_mode;
 409     int health_enabled = default_health_enabled;
 410     time_t alarms_delay = 60;
 411
 412     update_every = (int)appconfig_get_number(&stream_config, machine_guid, "update every", update_every);
 413     if(update_every < 0) update_every = 1;
 414
 415     history = (int)appconfig_get_number(&stream_config, key, "default history", history);
 416     history = (int)appconfig_get_number(&stream_config, machine_guid, "history", history);
 417     if(history < 5) history = 5;
 418
 419     mode = rrd_memory_mode_id(appconfig_get(&stream_config, key, "default memory mode", rrd_memory_mode_name(mode)));
 420     mode = rrd_memory_mode_id(appconfig_get(&stream_config, machine_guid, "memory mode", rrd_memory_mode_name(mode)));
 421
 422     health_enabled = appconfig_get_boolean_ondemand(&stream_config, key, "health enabled by default", health_enabled);
 423     health_enabled = appconfig_get_boolean_ondemand(&stream_config, machine_guid, "health enabled", health_enabled);
 424
 425     alarms_delay = appconfig_get_number(&stream_config, key, "default postpone alarms on connect seconds", alarms_delay);
 426     alarms_delay = appconfig_get_number(&stream_config, machine_guid, "postpone alarms on connect seconds", alarms_delay);
 427
 428     if(!strcmp(machine_guid, "localhost"))
 429         host = localhost;
 430     else
 431         host = rrdhost_find_or_create(hostname, machine_guid, os, update_every, history, mode, health_enabled?1:0);
 432
 433     info("STREAM [receive from [%s]:%s]: metrics for host '%s' with machine_guid '%s': update every = %d, history = %d, memory mode = %s, health %s",
 434          client_ip, client_port,
 435          hostname, machine_guid,
 436          update_every,
 437          history,
 438          rrd_memory_mode_name(mode),
 439          (health_enabled == CONFIG_BOOLEAN_NO)?"disabled":((health_enabled == CONFIG_BOOLEAN_YES)?"enabled":"auto")
 440     );
 441
 442     struct plugind cd = {
 443             .enabled = 1,
 444             .update_every = default_rrd_update_every,
 445             .pid = 0,
 446             .serial_failures = 0,
 447             .successful_collections = 0,
 448             .obsolete = 0,
 449             .started_t = now_realtime_sec(),
 450             .next = NULL,
 451     };
 452
 453     // put the client IP and port into the buffers used by plugins.d
 454     snprintfz(cd.id,           CONFIG_MAX_NAME,  "%s:%s", client_ip, client_port);
 455     snprintfz(cd.filename,     FILENAME_MAX,     "%s:%s", client_ip, client_port);
 456     snprintfz(cd.fullfilename, FILENAME_MAX,     "%s:%s", client_ip, client_port);
 457     snprintfz(cd.cmd,          PLUGINSD_CMD_MAX, "%s:%s", client_ip, client_port);
 458
 459     info("STREAM [receive from [%s]:%s]: initializing communication...", client_ip, client_port);
 460     if(send_timeout(fd, "STREAM", 6, 0, 60) != 6) {
 461         error("STREAM [receive from [%s]:%s]: cannot send STREAM command.", client_ip, client_port);
 462         return 0;
 463     }
 464
 465     // remove the non-blocking flag from the socket
 466     if(fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) & ~O_NONBLOCK) == -1)
 467         error("STREAM [receive from [%s]:%s]: cannot remove the non-blocking flag from socket %d", client_ip, client_port, fd);
 468
 469     // convert the socket to a FILE *
 470     FILE *fp = fdopen(fd, "r");
 471     if(!fp) {
 472         error("STREAM [receive from [%s]:%s]: failed to get a FILE for FD %d.", client_ip, client_port, fd);
 473         return 0;
 474     }
 475
 476     rrdhost_wrlock(host);
 477     host->use_counter++;
 478     if(health_enabled != CONFIG_BOOLEAN_NO)
 479         host->health_delay_up_to = now_realtime_sec() + alarms_delay;
 480     rrdhost_unlock(host);
 481
 482     // call the plugins.d processor to receive the metrics
 483     info("STREAM [receive from [%s]:%s]: receiving metrics... (host '%s', machine GUID '%s').", client_ip, client_port, host->hostname, host->machine_guid);
 484     size_t count = pluginsd_process(host, &cd, fp, 1);
 485     error("STREAM [receive from [%s]:%s]: disconnected (host '%s', machine GUID '%s', completed updates %zu).", client_ip, client_port, host->hostname, host->machine_guid, count);
 486
 487     rrdhost_wrlock(host);
 488     host->use_counter--;
 489     if(!host->use_counter && health_enabled == CONFIG_BOOLEAN_AUTO)
 490         host->health_enabled = 0;
 491     rrdhost_unlock(host);
 492
 493     // cleanup
 494     fclose(fp);
 495
 496     return (int)count;
 497 }
 498
 499 struct rrdpush_thread {
 500     int fd;
 501     char *key;
 502     char *hostname;
 503     char *machine_guid;
 504     char *os;
 505     char *client_ip;
 506     char *client_port;
 507     int update_every;
 508 };
 509
 510 void *rrdpush_receiver_thread(void *ptr) {
 511     struct rrdpush_thread *rpt = (struct rrdpush_thread *)ptr;
 512
 513     if (pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 514         error("STREAM [receive]: cannot set pthread cancel type to DEFERRED.");
 515
 516     if (pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 517         error("STREAM [receive]: cannot set pthread cancel state to ENABLE.");
 518
 519
 520     info("STREAM [%s]:%s: receive thread created (task id %d)", rpt->client_ip, rpt->client_port, gettid());
 521     rrdpush_receive(rpt->fd, rpt->key, rpt->hostname, rpt->machine_guid, rpt->os, rpt->update_every, rpt->client_ip, rpt->client_port);
 522     info("STREAM [receive from [%s]:%s]: receive thread ended (task id %d)", rpt->client_ip, rpt->client_port, gettid());
 523
 524     close(rpt->fd);
 525     freez(rpt->key);
 526     freez(rpt->hostname);
 527     freez(rpt->machine_guid);
 528     freez(rpt->os);
 529     freez(rpt->client_ip);
 530     freez(rpt->client_port);
 531     freez(rpt);
 532
 533     pthread_exit(NULL);
 534     return NULL;
 535 }
 536
 537 static inline int rrdpush_receive_validate_api_key(const char *key) {
 538     return appconfig_get_boolean(&stream_config, key, "enabled", 0);
 539 }
 540
 541 void rrdpush_sender_thread_spawn(RRDHOST *host) {
 542     if(pthread_create(&host->rrdpush_thread, NULL, rrdpush_sender_thread, (void *)host))
 543         error("STREAM [send for host %s]: failed to create new thread for client.", host->hostname);
 544
 545     else if(pthread_detach(host->rrdpush_thread))
 546         error("STREAM [send for host %s]: cannot request detach newly created thread.", host->hostname);
 547
 548     host->rrdpush_spawn = 1;
 549 }
 550
 551 int rrdpush_receiver_thread_spawn(RRDHOST *host, struct web_client *w, char *url) {
 552     (void)host;
 553
 554     info("STREAM [receive from [%s]:%s]: new client connection.", w->client_ip, w->client_port);
 555
 556     char *key = NULL, *hostname = NULL, *machine_guid = NULL, *os = NULL;
 557     int update_every = default_rrd_update_every;
 558
 559     while(url) {
 560         char *value = mystrsep(&url, "?&");
 561         if(!value || !*value) continue;
 562
 563         char *name = mystrsep(&value, "=");
 564         if(!name || !*name) continue;
 565         if(!value || !*value) continue;
 566
 567         if(!strcmp(name, "key"))
 568             key = value;
 569         else if(!strcmp(name, "hostname"))
 570             hostname = value;
 571         else if(!strcmp(name, "machine_guid"))
 572             machine_guid = value;
 573         else if(!strcmp(name, "update_every"))
 574             update_every = (int)strtoul(value, NULL, 0);
 575         else if(!strcmp(name, "os"))
 576             os = value;
 577     }
 578
 579     if(!key || !*key) {
 580         error("STREAM [receive from [%s]:%s]: request without an API key. Forbidding access.", w->client_ip, w->client_port);
 581         buffer_flush(w->response.data);
 582         buffer_sprintf(w->response.data, "You need an API key for this request.");
 583         return 401;
 584     }
 585
 586     if(!hostname || !*hostname) {
 587         error("STREAM [receive from [%s]:%s]: request without a hostname. Forbidding access.", w->client_ip, w->client_port);
 588         buffer_flush(w->response.data);
 589         buffer_sprintf(w->response.data, "You need to send a hostname too.");
 590         return 400;
 591     }
 592
 593     if(!machine_guid || !*machine_guid) {
 594         error("STREAM [receive from [%s]:%s]: request without a machine GUID. Forbidding access.", w->client_ip, w->client_port);
 595         buffer_flush(w->response.data);
 596         buffer_sprintf(w->response.data, "You need to send a machine GUID too.");
 597         return 400;
 598     }
 599
 600     if(!rrdpush_receive_validate_api_key(key)) {
 601         error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, key);
 602         buffer_flush(w->response.data);
 603         buffer_sprintf(w->response.data, "Your API key is not permitted access.");
 604         return 401;
 605     }
 606
 607     if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) {
 608         error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid);
 609         buffer_flush(w->response.data);
 610         buffer_sprintf(w->response.data, "Your machine guide is not permitted access.");
 611         return 404;
 612     }
 613
 614     struct rrdpush_thread *rpt = mallocz(sizeof(struct rrdpush_thread));
 615     rpt->fd           = w->ifd;
 616     rpt->key          = strdupz(key);
 617     rpt->hostname     = strdupz(hostname);
 618     rpt->machine_guid = strdupz(machine_guid);
 619     rpt->os           = strdupz(os);
 620     rpt->client_ip    = strdupz(w->client_ip);
 621     rpt->client_port  = strdupz(w->client_port);
 622     rpt->update_every = update_every;
 623     pthread_t thread;
 624
 625     debug(D_SYSTEM, "STREAM [receive from [%s]:%s]: starting receiving thread.", w->client_ip, w->client_port);
 626
 627     if(pthread_create(&thread, NULL, rrdpush_receiver_thread, (void *)rpt))
 628         error("STREAM [receive from [%s]:%s]: failed to create new thread for client.", w->client_ip, w->client_port);
 629
 630     else if(pthread_detach(thread))
 631         error("STREAM [receive from [%s]:%s]: cannot request detach newly created thread.", w->client_ip, w->client_port);
 632
 633     // prevent the caller from closing the streaming socket
 634     if(w->ifd == w->ofd)
 635         w->ifd = w->ofd = -1;
 636     else
 637         w->ifd = -1;
 638
 639     buffer_flush(w->response.data);
 640     return 200;
 641 }