src/rrdpush.c

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