src/rrdpush.c

   1 #include "common.h"
   2
   3 /*
   4  * rrdpush
   5  *
   6  * 3 threads are involved for all stream operations
   7  *
   8  * 1. a random data collection thread, calling rrdset_done_push()
   9  *    this is called for each chart.
  10  *
  11  *    the output of this work is kept in a BUFFER in RRDHOST
  12  *    the sender thread is signalled via a pipe (also in RRDHOST)
  13  *
  14  * 2. a sender thread running at the sending netdata
  15  *    this is spawned automatically on the first chart to be pushed
  16  *
  17  *    It tries to push the metrics to the remote netdata, as fast
  18  *    as possible (i.e. immediately after they are collected).
  19  *
  20  * 3. a receiver thread, running at the receiving netdata
  21  *    this is spawned automatically when the sender connects to
  22  *    the receiver.
  23  *
  24  */
  25
  26 #define START_STREAMING_PROMPT "Hit me baby, push them over..."
  27
  28 int default_rrdpush_enabled = 0;
  29 char *default_rrdpush_destination = NULL;
  30 char *default_rrdpush_api_key = NULL;
  31
  32 int rrdpush_init() {
  33     default_rrdpush_enabled     = appconfig_get_boolean(&stream_config, CONFIG_SECTION_STREAM, "enabled", default_rrdpush_enabled);
  34     default_rrdpush_destination = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "destination", "");
  35     default_rrdpush_api_key     = appconfig_get(&stream_config, CONFIG_SECTION_STREAM, "api key", "");
  36
  37     if(default_rrdpush_enabled && (!default_rrdpush_destination || !*default_rrdpush_destination || !default_rrdpush_api_key || !*default_rrdpush_api_key)) {
  38         error("STREAM [send]: cannot enable sending thread - information is missing.");
  39         default_rrdpush_enabled = 0;
  40         default_rrdpush_api_key = NULL;
  41         default_rrdpush_destination = NULL;
  42     }
  43
  44     return default_rrdpush_enabled;
  45 }
  46
  47 #define CONNECTED_TO_SIZE 100
  48
  49 // data collection happens from multiple threads
  50 // each of these threads calls rrdset_done()
  51 // which in turn calls rrdset_done_push()
  52 // which uses this pipe to notify the streaming thread
  53 // that there are more data ready to be sent
  54 #define PIPE_READ 0
  55 #define PIPE_WRITE 1
  56
  57 // to have the remote netdata re-sync the charts
  58 // to its current clock, we send for this many
  59 // iterations a BEGIN line without microseconds
  60 // this is for the first iterations of each chart
  61 static unsigned int remote_clock_resync_iterations = 60;
  62
  63 #define rrdpush_lock(host) pthread_mutex_lock(&((host)->rrdpush_mutex))
  64 #define rrdpush_unlock(host) pthread_mutex_unlock(&((host)->rrdpush_mutex))
  65
  66 // checks if the current chart definition has been sent
  67 static inline int need_to_send_chart_definition(RRDSET *st) {
  68     RRDDIM *rd;
  69     rrddim_foreach_read(rd, st)
  70         if(!rrddim_flag_check(rd, RRDDIM_FLAG_EXPOSED))
  71             return 1;
  72
  73     return 0;
  74 }
  75
  76 // sends the current chart definition
  77 static inline void send_chart_definition(RRDSET *st) {
  78     buffer_sprintf(st->rrdhost->rrdpush_buffer, "CHART '%s' '%s' '%s' '%s' '%s' '%s' '%s' %ld %d\n"
  79                 , st->id
  80                 , st->name
  81                 , st->title
  82                 , st->units
  83                 , st->family
  84                 , st->context
  85                 , rrdset_type_name(st->chart_type)
  86                 , st->priority
  87                 , st->update_every
  88     );
  89
  90     RRDDIM *rd;
  91     rrddim_foreach_read(rd, st) {
  92         buffer_sprintf(st->rrdhost->rrdpush_buffer, "DIMENSION '%s' '%s' '%s' " COLLECTED_NUMBER_FORMAT " " COLLECTED_NUMBER_FORMAT " '%s %s'\n"
  93                        , rd->id
  94                        , rd->name
  95                        , rrd_algorithm_name(rd->algorithm)
  96                        , rd->multiplier
  97                        , rd->divisor
  98                        , rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)?"hidden":""
  99                        , rrddim_flag_check(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)?"noreset":""
 100         );
 101         rrddim_flag_set(rd, RRDDIM_FLAG_EXPOSED);
 102     }
 103 }
 104
 105 // sends the current chart dimensions
 106 static inline void send_chart_metrics(RRDSET *st) {
 107     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);
 108
 109     RRDDIM *rd;
 110     rrddim_foreach_read(rd, st) {
 111         if(rrddim_flag_check(rd, RRDDIM_FLAG_UPDATED) && rrddim_flag_check(rd, RRDDIM_FLAG_EXPOSED))
 112             buffer_sprintf(st->rrdhost->rrdpush_buffer, "SET %s = " COLLECTED_NUMBER_FORMAT "\n"
 113                        , rd->id
 114                        , rd->collected_value
 115         );
 116     }
 117
 118     buffer_strcat(st->rrdhost->rrdpush_buffer, "END\n");
 119 }
 120
 121 void rrdpush_sender_thread_spawn(RRDHOST *host);
 122
 123 void rrdset_done_push(RRDSET *st) {
 124     RRDHOST *host = st->rrdhost;
 125
 126     if(unlikely(!rrdset_flag_check(st, RRDSET_FLAG_ENABLED)))
 127         return;
 128
 129     rrdpush_lock(host);
 130
 131     if(unlikely(host->rrdpush_enabled && !host->rrdpush_spawn))
 132         rrdpush_sender_thread_spawn(host);
 133
 134     if(unlikely(!host->rrdpush_buffer || !host->rrdpush_connected)) {
 135         if(unlikely(!host->rrdpush_error_shown))
 136             error("STREAM %s [send]: not ready - discarding collected metrics.", host->hostname);
 137
 138         host->rrdpush_error_shown = 1;
 139
 140         rrdpush_unlock(host);
 141         return;
 142     }
 143     else if(unlikely(host->rrdpush_error_shown)) {
 144         info("STREAM %s [send]: ready - sending metrics...", host->hostname);
 145         host->rrdpush_error_shown = 0;
 146     }
 147
 148     if(need_to_send_chart_definition(st))
 149         send_chart_definition(st);
 150
 151     send_chart_metrics(st);
 152
 153     // signal the sender there are more data
 154     if(write(host->rrdpush_pipe[PIPE_WRITE], " ", 1) == -1)
 155         error("STREAM %s [send]: cannot write to internal pipe", host->hostname);
 156
 157     rrdpush_unlock(host);
 158 }
 159
 160 // ----------------------------------------------------------------------------
 161 // rrdpush sender thread
 162
 163 // resets all the chart, so that their definitions
 164 // will be resent to the central netdata
 165 static void rrdpush_sender_thread_reset_all_charts(RRDHOST *host) {
 166     rrdhost_rdlock(host);
 167
 168     RRDSET *st;
 169     rrdset_foreach_read(st, host) {
 170
 171         // make it re-align the current time
 172         // on the remote host
 173         st->counter_done = 0;
 174
 175         rrdset_rdlock(st);
 176
 177         RRDDIM *rd;
 178         rrddim_foreach_read(rd, st)
 179             rrddim_flag_clear(rd, RRDDIM_FLAG_EXPOSED);
 180
 181         rrdset_unlock(st);
 182     }
 183
 184     rrdhost_unlock(host);
 185 }
 186
 187 static inline void rrdpush_sender_thread_data_flush(RRDHOST *host) {
 188     rrdpush_lock(host);
 189     if(buffer_strlen(host->rrdpush_buffer))
 190         error("STREAM %s [send]: discarding %zu bytes of metrics already in the buffer.", host->hostname, buffer_strlen(host->rrdpush_buffer));
 191
 192     buffer_flush(host->rrdpush_buffer);
 193     rrdpush_sender_thread_reset_all_charts(host);
 194     rrdpush_unlock(host);
 195 }
 196
 197 static inline void rrdpush_sender_thread_lock(RRDHOST *host) {
 198     if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 199         error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname);
 200
 201     rrdpush_lock(host);
 202 }
 203
 204 static inline void rrdpush_sender_thread_unlock(RRDHOST *host) {
 205     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 206         error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname);
 207
 208     rrdpush_unlock(host);
 209 }
 210
 211 void rrdpush_sender_thread_cleanup(RRDHOST *host) {
 212     rrdpush_lock(host);
 213
 214     host->rrdpush_connected = 0;
 215
 216     if(host->rrdpush_socket != -1) close(host->rrdpush_socket);
 217
 218     // close the pipe
 219     if(host->rrdpush_pipe[PIPE_READ] != -1)  close(host->rrdpush_pipe[PIPE_READ]);
 220     if(host->rrdpush_pipe[PIPE_WRITE] != -1) close(host->rrdpush_pipe[PIPE_WRITE]);
 221     host->rrdpush_pipe[PIPE_READ] = -1;
 222     host->rrdpush_pipe[PIPE_WRITE] = -1;
 223
 224     buffer_free(host->rrdpush_buffer);
 225     host->rrdpush_buffer = NULL;
 226
 227     host->rrdpush_spawn = 0;
 228     host->rrdpush_enabled = 0;
 229
 230     rrdpush_unlock(host);
 231 }
 232
 233 void *rrdpush_sender_thread(void *ptr) {
 234     RRDHOST *host = (RRDHOST *)ptr;
 235
 236     info("STREAM %s [send]: thread created (task id %d)", host->hostname, gettid());
 237
 238     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 239         error("STREAM %s [send]: cannot set pthread cancel type to DEFERRED.", host->hostname);
 240
 241     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 242         error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname);
 243
 244     int timeout = (int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "timeout seconds", 60);
 245     int default_port = (int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "default port", 19999);
 246     size_t max_size = (size_t)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "buffer size bytes", 1024 * 1024);
 247     unsigned int reconnect_delay = (unsigned int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "reconnect delay seconds", 5);
 248     remote_clock_resync_iterations = (unsigned int)appconfig_get_number(&stream_config, CONFIG_SECTION_STREAM, "initial clock resync iterations", remote_clock_resync_iterations);
 249     char connected_to[CONNECTED_TO_SIZE + 1] = "";
 250
 251     if(!host->rrdpush_enabled || !host->rrdpush_destination || !*host->rrdpush_destination || !host->rrdpush_api_key || !*host->rrdpush_api_key)
 252         goto cleanup;
 253
 254     // initialize rrdpush globals
 255     host->rrdpush_buffer = buffer_create(1);
 256     host->rrdpush_connected = 0;
 257     if(pipe(host->rrdpush_pipe) == -1) fatal("STREAM %s [send]: cannot create required pipe.", host->hostname);
 258
 259     // initialize local variables
 260     size_t begin = 0;
 261     size_t reconnects_counter = 0;
 262     size_t sent_bytes = 0;
 263     size_t sent_connection = 0;
 264
 265     struct timeval tv = {
 266             .tv_sec = timeout,
 267             .tv_usec = 0
 268     };
 269
 270     struct pollfd fds[2], *ifd, *ofd;
 271     nfds_t fdmax;
 272
 273     ifd = &fds[0];
 274     ofd = &fds[1];
 275
 276     for(; host->rrdpush_enabled && !netdata_exit ;) {
 277
 278         if(unlikely(host->rrdpush_socket == -1)) {
 279             // stop appending data into rrdpush_buffer
 280             // they will be lost, so there is no point to do it
 281             host->rrdpush_connected = 0;
 282
 283             info("STREAM %s [send to %s]: connecting...", host->hostname, host->rrdpush_destination);
 284             host->rrdpush_socket = connect_to_one_of(host->rrdpush_destination, default_port, &tv, &reconnects_counter, connected_to, CONNECTED_TO_SIZE);
 285
 286             if(unlikely(host->rrdpush_socket == -1)) {
 287                 error("STREAM %s [send to %s]: failed to connect", host->hostname, host->rrdpush_destination);
 288                 sleep(reconnect_delay);
 289                 continue;
 290             }
 291
 292             info("STREAM %s [send to %s]: initializing communication...", host->hostname, connected_to);
 293
 294             char http[1000 + 1];
 295             snprintfz(http, 1000,
 296                     "STREAM key=%s&hostname=%s&machine_guid=%s&os=%s&update_every=%d HTTP/1.1\r\n"
 297                     "User-Agent: netdata-push-service/%s\r\n"
 298                     "Accept: */*\r\n\r\n"
 299                       , host->rrdpush_api_key
 300                       , host->hostname
 301                       , host->machine_guid
 302                       , host->os
 303                       , default_rrd_update_every
 304                       , program_version
 305             );
 306
 307             if(send_timeout(host->rrdpush_socket, http, strlen(http), 0, timeout) == -1) {
 308                 close(host->rrdpush_socket);
 309                 host->rrdpush_socket = -1;
 310                 error("STREAM %s [send to %s]: failed to send http header to netdata", host->hostname, connected_to);
 311                 sleep(reconnect_delay);
 312                 continue;
 313             }
 314
 315             info("STREAM %s [send to %s]: waiting response from remote netdata...", host->hostname, connected_to);
 316
 317             if(recv_timeout(host->rrdpush_socket, http, 1000, 0, timeout) == -1) {
 318                 close(host->rrdpush_socket);
 319                 host->rrdpush_socket = -1;
 320                 error("STREAM %s [send to %s]: failed to initialize communication", host->hostname, connected_to);
 321                 sleep(reconnect_delay);
 322                 continue;
 323             }
 324
 325             if(strncmp(http, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT))) {
 326                 close(host->rrdpush_socket);
 327                 host->rrdpush_socket = -1;
 328                 error("STREAM %s [send to %s]: server is not replying properly.", host->hostname, connected_to);
 329                 sleep(reconnect_delay);
 330                 continue;
 331             }
 332
 333             info("STREAM %s [send to %s]: established communication - sending metrics...", host->hostname, connected_to);
 334
 335             if(fcntl(host->rrdpush_socket, F_SETFL, O_NONBLOCK) < 0)
 336                 error("STREAM %s [send to %s]: cannot set non-blocking mode for socket.", host->hostname, connected_to);
 337
 338             rrdpush_sender_thread_data_flush(host);
 339             sent_connection = 0;
 340
 341             // allow appending data into rrdpush_buffer
 342             host->rrdpush_connected = 1;
 343         }
 344
 345         ifd->fd = host->rrdpush_pipe[PIPE_READ];
 346         ifd->events = POLLIN;
 347         ifd->revents = 0;
 348
 349         ofd->fd = host->rrdpush_socket;
 350         ofd->revents = 0;
 351         if(begin < buffer_strlen(host->rrdpush_buffer)) {
 352             ofd->events = POLLOUT;
 353             fdmax = 2;
 354         }
 355         else {
 356             ofd->events = 0;
 357             fdmax = 1;
 358         }
 359
 360         if(netdata_exit) break;
 361         int retval = poll(fds, fdmax, timeout * 1000);
 362         if(netdata_exit) break;
 363
 364         if(unlikely(retval == -1)) {
 365             if(errno == EAGAIN || errno == EINTR)
 366                 continue;
 367
 368             error("STREAM %s [send to %s]: failed to poll().", host->hostname, connected_to);
 369             close(host->rrdpush_socket);
 370             host->rrdpush_socket = -1;
 371             break;
 372         }
 373         else if(unlikely(!retval)) {
 374             // timeout
 375             continue;
 376         }
 377
 378         if(ifd->revents & POLLIN) {
 379             char buffer[1000 + 1];
 380             if(read(host->rrdpush_pipe[PIPE_READ], buffer, 1000) == -1)
 381                 error("STREAM %s [send to %s]: cannot read from internal pipe.", host->hostname, connected_to);
 382         }
 383
 384         if(ofd->revents & POLLOUT && begin < buffer_strlen(host->rrdpush_buffer)) {
 385             rrdpush_sender_thread_lock(host);
 386             ssize_t ret = send(host->rrdpush_socket, &host->rrdpush_buffer->buffer[begin], buffer_strlen(host->rrdpush_buffer) - begin, MSG_DONTWAIT);
 387             if(ret == -1) {
 388                 if(errno != EAGAIN && errno != EINTR) {
 389                     error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
 390                     close(host->rrdpush_socket);
 391                     host->rrdpush_socket = -1;
 392                 }
 393             }
 394             else {
 395                 sent_connection += ret;
 396                 sent_bytes += ret;
 397                 begin += ret;
 398                 if(begin == buffer_strlen(host->rrdpush_buffer)) {
 399                     buffer_flush(host->rrdpush_buffer);
 400                     begin = 0;
 401                 }
 402             }
 403             rrdpush_sender_thread_unlock(host);
 404         }
 405
 406         // protection from overflow
 407         if(host->rrdpush_buffer->len > max_size) {
 408             errno = 0;
 409             error("STREAM %s [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.", host->hostname, connected_to, host->rrdpush_buffer->len, host->rrdpush_buffer->len - begin, sent_bytes, sent_connection);
 410             if(host->rrdpush_socket != -1) {
 411                 close(host->rrdpush_socket);
 412                 host->rrdpush_socket = -1;
 413             }
 414         }
 415     }
 416
 417 cleanup:
 418     debug(D_WEB_CLIENT, "STREAM %s [send]: sending thread exits.", host->hostname);
 419
 420     rrdpush_sender_thread_cleanup(host);
 421
 422     pthread_exit(NULL);
 423     return NULL;
 424 }
 425
 426
 427 // ----------------------------------------------------------------------------
 428 // rrdpush receiver thread
 429
 430 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) {
 431     RRDHOST *host;
 432     int history = default_rrd_history_entries;
 433     RRD_MEMORY_MODE mode = default_rrd_memory_mode;
 434     int health_enabled = default_health_enabled;
 435     int rrdpush_enabled = default_rrdpush_enabled;
 436     char *rrdpush_destination = default_rrdpush_destination;
 437     char *rrdpush_api_key = default_rrdpush_api_key;
 438     time_t alarms_delay = 60;
 439
 440     update_every = (int)appconfig_get_number(&stream_config, machine_guid, "update every", update_every);
 441     if(update_every < 0) update_every = 1;
 442
 443     history = (int)appconfig_get_number(&stream_config, key, "default history", history);
 444     history = (int)appconfig_get_number(&stream_config, machine_guid, "history", history);
 445     if(history < 5) history = 5;
 446
 447     mode = rrd_memory_mode_id(appconfig_get(&stream_config, key, "default memory mode", rrd_memory_mode_name(mode)));
 448     mode = rrd_memory_mode_id(appconfig_get(&stream_config, machine_guid, "memory mode", rrd_memory_mode_name(mode)));
 449
 450     health_enabled = appconfig_get_boolean_ondemand(&stream_config, key, "health enabled by default", health_enabled);
 451     health_enabled = appconfig_get_boolean_ondemand(&stream_config, machine_guid, "health enabled", health_enabled);
 452
 453     alarms_delay = appconfig_get_number(&stream_config, key, "default postpone alarms on connect seconds", alarms_delay);
 454     alarms_delay = appconfig_get_number(&stream_config, machine_guid, "postpone alarms on connect seconds", alarms_delay);
 455
 456     rrdpush_enabled = appconfig_get_boolean(&stream_config, key, "default proxy enabled", rrdpush_enabled);
 457     rrdpush_enabled = appconfig_get_boolean(&stream_config, machine_guid, "proxy enabled", rrdpush_enabled);
 458
 459     rrdpush_destination = appconfig_get(&stream_config, key, "default proxy destination", rrdpush_destination);
 460     rrdpush_destination = appconfig_get(&stream_config, machine_guid, "proxy destination", rrdpush_destination);
 461
 462     rrdpush_api_key = appconfig_get(&stream_config, key, "default proxy api key", rrdpush_api_key);
 463     rrdpush_api_key = appconfig_get(&stream_config, machine_guid, "proxy api key", rrdpush_api_key);
 464
 465     if(!strcmp(machine_guid, "localhost"))
 466         host = localhost;
 467     else
 468         host = rrdhost_find_or_create(
 469                 hostname
 470                 , machine_guid
 471                 , os
 472                 , update_every
 473                 , history
 474                 , mode
 475                 , (health_enabled != CONFIG_BOOLEAN_NO)
 476                 , (rrdpush_enabled && rrdpush_destination && *rrdpush_destination && rrdpush_api_key && *rrdpush_api_key)
 477                 , rrdpush_destination
 478                 , rrdpush_api_key
 479         );
 480
 481     if(!host) {
 482         close(fd);
 483         error("STREAM %s [receive from [%s]:%s]: failed to find/create host structure.", hostname, client_ip, client_port);
 484         return 1;
 485     }
 486
 487 #ifdef NETDATA_INTERNAL_CHECKS
 488     info("STREAM %s [receive from [%s]:%s]: client willing to stream metrics for host '%s' with machine_guid '%s': update every = %d, history = %d, memory mode = %s, health %s"
 489          , hostname
 490          , client_ip
 491          , client_port
 492          , host->hostname
 493          , host->machine_guid
 494          , host->rrd_update_every
 495          , host->rrd_history_entries
 496          , rrd_memory_mode_name(host->rrd_memory_mode)
 497          , (health_enabled == CONFIG_BOOLEAN_NO)?"disabled":((health_enabled == CONFIG_BOOLEAN_YES)?"enabled":"auto")
 498     );
 499 #endif // NETDATA_INTERNAL_CHECKS
 500
 501     struct plugind cd = {
 502             .enabled = 1,
 503             .update_every = default_rrd_update_every,
 504             .pid = 0,
 505             .serial_failures = 0,
 506             .successful_collections = 0,
 507             .obsolete = 0,
 508             .started_t = now_realtime_sec(),
 509             .next = NULL,
 510     };
 511
 512     // put the client IP and port into the buffers used by plugins.d
 513     snprintfz(cd.id,           CONFIG_MAX_NAME,  "%s:%s", client_ip, client_port);
 514     snprintfz(cd.filename,     FILENAME_MAX,     "%s:%s", client_ip, client_port);
 515     snprintfz(cd.fullfilename, FILENAME_MAX,     "%s:%s", client_ip, client_port);
 516     snprintfz(cd.cmd,          PLUGINSD_CMD_MAX, "%s:%s", client_ip, client_port);
 517
 518     info("STREAM %s [receive from [%s]:%s]: initializing communication...", host->hostname, client_ip, client_port);
 519     if(send_timeout(fd, START_STREAMING_PROMPT, strlen(START_STREAMING_PROMPT), 0, 60) != strlen(START_STREAMING_PROMPT)) {
 520         error("STREAM %s [receive from [%s]:%s]: cannot send ready command.", host->hostname, client_ip, client_port);
 521         return 0;
 522     }
 523
 524     // remove the non-blocking flag from the socket
 525     if(fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) & ~O_NONBLOCK) == -1)
 526         error("STREAM %s [receive from [%s]:%s]: cannot remove the non-blocking flag from socket %d", host->hostname, client_ip, client_port, fd);
 527
 528     // convert the socket to a FILE *
 529     FILE *fp = fdopen(fd, "r");
 530     if(!fp) {
 531         error("STREAM %s [receive from [%s]:%s]: failed to get a FILE for FD %d.", host->hostname, client_ip, client_port, fd);
 532         return 0;
 533     }
 534
 535     rrdhost_wrlock(host);
 536     host->use_counter++;
 537     if(health_enabled != CONFIG_BOOLEAN_NO)
 538         host->health_delay_up_to = now_realtime_sec() + alarms_delay;
 539     rrdhost_unlock(host);
 540
 541     // call the plugins.d processor to receive the metrics
 542     info("STREAM %s [receive from [%s]:%s]: receiving metrics...", host->hostname, client_ip, client_port);
 543     size_t count = pluginsd_process(host, &cd, fp, 1);
 544     error("STREAM %s [receive from [%s]:%s]: disconnected (completed updates %zu).", host->hostname, client_ip, client_port, count);
 545
 546     rrdhost_wrlock(host);
 547     host->use_counter--;
 548     if(!host->use_counter && health_enabled == CONFIG_BOOLEAN_AUTO)
 549         host->health_enabled = 0;
 550     rrdhost_unlock(host);
 551
 552     // cleanup
 553     fclose(fp);
 554
 555     return (int)count;
 556 }
 557
 558 struct rrdpush_thread {
 559     int fd;
 560     char *key;
 561     char *hostname;
 562     char *machine_guid;
 563     char *os;
 564     char *client_ip;
 565     char *client_port;
 566     int update_every;
 567 };
 568
 569 void *rrdpush_receiver_thread(void *ptr) {
 570     struct rrdpush_thread *rpt = (struct rrdpush_thread *)ptr;
 571
 572     if (pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 573         error("STREAM %s [receive]: cannot set pthread cancel type to DEFERRED.", rpt->hostname);
 574
 575     if (pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 576         error("STREAM %s [receive]: cannot set pthread cancel state to ENABLE.", rpt->hostname);
 577
 578
 579     info("STREAM %s [%s]:%s: receive thread created (task id %d)", rpt->hostname, rpt->client_ip, rpt->client_port, gettid());
 580     rrdpush_receive(rpt->fd, rpt->key, rpt->hostname, rpt->machine_guid, rpt->os, rpt->update_every, rpt->client_ip, rpt->client_port);
 581     info("STREAM %s [receive from [%s]:%s]: receive thread ended (task id %d)", rpt->hostname, rpt->client_ip, rpt->client_port, gettid());
 582
 583     close(rpt->fd);
 584     freez(rpt->key);
 585     freez(rpt->hostname);
 586     freez(rpt->machine_guid);
 587     freez(rpt->os);
 588     freez(rpt->client_ip);
 589     freez(rpt->client_port);
 590     freez(rpt);
 591
 592     pthread_exit(NULL);
 593     return NULL;
 594 }
 595
 596 void rrdpush_sender_thread_spawn(RRDHOST *host) {
 597     if(pthread_create(&host->rrdpush_thread, NULL, rrdpush_sender_thread, (void *)host))
 598         error("STREAM %s [send]: failed to create new thread for client.", host->hostname);
 599
 600     else if(pthread_detach(host->rrdpush_thread))
 601         error("STREAM %s [send]: cannot request detach newly created thread.", host->hostname);
 602
 603     host->rrdpush_spawn = 1;
 604 }
 605
 606 int rrdpush_receiver_thread_spawn(RRDHOST *host, struct web_client *w, char *url) {
 607     (void)host;
 608
 609     info("STREAM [receive from [%s]:%s]: new client connection.", w->client_ip, w->client_port);
 610
 611     char *key = NULL, *hostname = NULL, *machine_guid = NULL, *os = NULL;
 612     int update_every = default_rrd_update_every;
 613     char buf[GUID_LEN + 1];
 614
 615     while(url) {
 616         char *value = mystrsep(&url, "?&");
 617         if(!value || !*value) continue;
 618
 619         char *name = mystrsep(&value, "=");
 620         if(!name || !*name) continue;
 621         if(!value || !*value) continue;
 622
 623         if(!strcmp(name, "key"))
 624             key = value;
 625         else if(!strcmp(name, "hostname"))
 626             hostname = value;
 627         else if(!strcmp(name, "machine_guid"))
 628             machine_guid = value;
 629         else if(!strcmp(name, "update_every"))
 630             update_every = (int)strtoul(value, NULL, 0);
 631         else if(!strcmp(name, "os"))
 632             os = value;
 633     }
 634
 635     if(!key || !*key) {
 636         error("STREAM [receive from [%s]:%s]: request without an API key. Forbidding access.", w->client_ip, w->client_port);
 637         buffer_flush(w->response.data);
 638         buffer_sprintf(w->response.data, "You need an API key for this request.");
 639         return 401;
 640     }
 641
 642     if(!hostname || !*hostname) {
 643         error("STREAM [receive from [%s]:%s]: request without a hostname. Forbidding access.", w->client_ip, w->client_port);
 644         buffer_flush(w->response.data);
 645         buffer_sprintf(w->response.data, "You need to send a hostname too.");
 646         return 400;
 647     }
 648
 649     if(!machine_guid || !*machine_guid) {
 650         error("STREAM [receive from [%s]:%s]: request without a machine GUID. Forbidding access.", w->client_ip, w->client_port);
 651         buffer_flush(w->response.data);
 652         buffer_sprintf(w->response.data, "You need to send a machine GUID too.");
 653         return 400;
 654     }
 655
 656     if(regenerate_guid(key, buf) == -1) {
 657         error("STREAM [receive from [%s]:%s]: API key '%s' is not valid GUID. Forbidding access.", w->client_ip, w->client_port, key);
 658         buffer_flush(w->response.data);
 659         buffer_sprintf(w->response.data, "Your API key is invalid.");
 660         return 401;
 661     }
 662
 663     if(regenerate_guid(machine_guid, buf) == -1) {
 664         error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not GUID. Forbidding access.", w->client_ip, w->client_port, key);
 665         buffer_flush(w->response.data);
 666         buffer_sprintf(w->response.data, "Your machine GUID is invalid.");
 667         return 404;
 668     }
 669
 670     if(!appconfig_get_boolean(&stream_config, key, "enabled", 1)) {
 671         error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid);
 672         buffer_flush(w->response.data);
 673         buffer_sprintf(w->response.data, "Your API key is not permitted access.");
 674         return 401;
 675     }
 676
 677     if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) {
 678         error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid);
 679         buffer_flush(w->response.data);
 680         buffer_sprintf(w->response.data, "Your machine guide is not permitted access.");
 681         return 404;
 682     }
 683
 684     struct rrdpush_thread *rpt = mallocz(sizeof(struct rrdpush_thread));
 685     rpt->fd           = w->ifd;
 686     rpt->key          = strdupz(key);
 687     rpt->hostname     = strdupz(hostname);
 688     rpt->machine_guid = strdupz(machine_guid);
 689     rpt->os           = strdupz(os);
 690     rpt->client_ip    = strdupz(w->client_ip);
 691     rpt->client_port  = strdupz(w->client_port);
 692     rpt->update_every = update_every;
 693     pthread_t thread;
 694
 695     debug(D_SYSTEM, "STREAM [receive from [%s]:%s]: starting receiving thread.", w->client_ip, w->client_port);
 696
 697     if(pthread_create(&thread, NULL, rrdpush_receiver_thread, (void *)rpt))
 698         error("STREAM [receive from [%s]:%s]: failed to create new thread for client.", w->client_ip, w->client_port);
 699
 700     else if(pthread_detach(thread))
 701         error("STREAM [receive from [%s]:%s]: cannot request detach newly created thread.", w->client_ip, w->client_port);
 702
 703     // prevent the caller from closing the streaming socket
 704     if(w->ifd == w->ofd)
 705         w->ifd = w->ofd = -1;
 706     else
 707         w->ifd = -1;
 708
 709     buffer_flush(w->response.data);
 710     return 200;
 711 }