src/write_riemann.c

   1 /**
   2  * collectd - src/write_riemann.c
   3  * Copyright (C) 2012,2013  Pierre-Yves Ritschard
   4  * Copyright (C) 2013       Florian octo Forster
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *   Pierre-Yves Ritschard <pyr at spootnik.org>
  26  *   Florian octo Forster <octo at collectd.org>
  27  */
  28
  29 #include "collectd.h"
  30
  31 #include "plugin.h"
  32 #include "common.h"
  33 #include "configfile.h"
  34 #include "utils_cache.h"
  35 #include "riemann.pb-c.h"
  36 #include "write_riemann_threshold.h"
  37
  38 #include <sys/socket.h>
  39 #include <arpa/inet.h>
  40 #include <netdb.h>
  41
  42 #define RIEMANN_HOST            "localhost"
  43 #define RIEMANN_PORT            "5555"
  44 #define RIEMANN_TTL_FACTOR      2.0
  45 #define RIEMANN_BATCH_MAX       8192
  46
  47 struct riemann_host {
  48         char                    *name;
  49         char                    *event_service_prefix;
  50 #define F_CONNECT        0x01
  51         uint8_t                  flags;
  52         pthread_mutex_t  lock;
  53     _Bool            batch_mode;
  54         _Bool            notifications;
  55         _Bool            check_thresholds;
  56         _Bool                    store_rates;
  57         _Bool                    always_append_ds;
  58         char                    *node;
  59         char                    *service;
  60         _Bool                    use_tcp;
  61         int                          s;
  62         double                   ttl_factor;
  63     Msg             *batch_msg;
  64     cdtime_t         batch_init;
  65     int              batch_max;
  66         int                          reference_count;
  67 };
  68
  69 static char     **riemann_tags;
  70 static size_t     riemann_tags_num;
  71 static char     **riemann_attrs;
  72 static size_t     riemann_attrs_num;
  73
  74 static void riemann_event_protobuf_free (Event *event) /* {{{ */
  75 {
  76         size_t i;
  77
  78         if (event == NULL)
  79                 return;
  80
  81         sfree (event->state);
  82         sfree (event->service);
  83         sfree (event->host);
  84         sfree (event->description);
  85
  86         strarray_free (event->tags, event->n_tags);
  87         event->tags = NULL;
  88         event->n_tags = 0;
  89
  90         for (i = 0; i < event->n_attributes; i++)
  91         {
  92                 sfree (event->attributes[i]->key);
  93                 sfree (event->attributes[i]->value);
  94                 sfree (event->attributes[i]);
  95         }
  96         sfree (event->attributes);
  97         event->n_attributes = 0;
  98
  99         sfree (event);
 100 } /* }}} void riemann_event_protobuf_free */
 101
 102 static void riemann_msg_protobuf_free(Msg *msg) /* {{{ */
 103 {
 104         size_t i;
 105
 106         if (msg == NULL)
 107                 return;
 108
 109         for (i = 0; i < msg->n_events; i++)
 110         {
 111                 riemann_event_protobuf_free (msg->events[i]);
 112                 msg->events[i] = NULL;
 113         }
 114
 115         sfree (msg->events);
 116         msg->n_events = 0;
 117
 118         sfree (msg);
 119 } /* }}} void riemann_msg_protobuf_free */
 120
 121 /* host->lock must be held when calling this function. */
 122 static int riemann_connect(struct riemann_host *host) /* {{{ */
 123 {
 124         int                      e;
 125         struct addrinfo         *ai, *res, hints;
 126         char const              *node;
 127         char const              *service;
 128
 129         if (host->flags & F_CONNECT)
 130                 return 0;
 131
 132         memset(&hints, 0, sizeof(hints));
 133         memset(&service, 0, sizeof(service));
 134         hints.ai_family = AF_UNSPEC;
 135         hints.ai_socktype = host->use_tcp ? SOCK_STREAM : SOCK_DGRAM;
 136 #ifdef AI_ADDRCONFIG
 137         hints.ai_flags |= AI_ADDRCONFIG;
 138 #endif
 139
 140         node = (host->node != NULL) ? host->node : RIEMANN_HOST;
 141         service = (host->service != NULL) ? host->service : RIEMANN_PORT;
 142
 143         if ((e = getaddrinfo(node, service, &hints, &res)) != 0) {
 144                 ERROR ("write_riemann plugin: Unable to resolve host \"%s\": %s",
 145                         node, gai_strerror(e));
 146                 return -1;
 147         }
 148
 149         host->s = -1;
 150         for (ai = res; ai != NULL; ai = ai->ai_next) {
 151                 if ((host->s = socket(ai->ai_family,
 152                                       ai->ai_socktype,
 153                                       ai->ai_protocol)) == -1) {
 154                         continue;
 155                 }
 156
 157                 if (connect(host->s, ai->ai_addr, ai->ai_addrlen) != 0) {
 158                         close(host->s);
 159                         host->s = -1;
 160                         continue;
 161                 }
 162
 163                 host->flags |= F_CONNECT;
 164                 DEBUG("write_riemann plugin: got a successful connection for: %s:%s",
 165                                 node, service);
 166                 break;
 167         }
 168
 169         freeaddrinfo(res);
 170
 171         if (host->s < 0) {
 172                 WARNING("write_riemann plugin: Unable to connect to Riemann at %s:%s",
 173                                 node, service);
 174                 return -1;
 175         }
 176         return 0;
 177 } /* }}} int riemann_connect */
 178
 179 /* host->lock must be held when calling this function. */
 180 static int riemann_disconnect (struct riemann_host *host) /* {{{ */
 181 {
 182         if ((host->flags & F_CONNECT) == 0)
 183                 return (0);
 184
 185         close (host->s);
 186         host->s = -1;
 187         host->flags &= ~F_CONNECT;
 188
 189         return (0);
 190 } /* }}} int riemann_disconnect */
 191
 192 static int riemann_send_msg (struct riemann_host *host, const Msg *msg) /* {{{ */
 193 {
 194         int status = 0;
 195         u_char *buffer = NULL;
 196         size_t  buffer_len;
 197
 198         status = riemann_connect (host);
 199         if (status != 0)
 200                 return status;
 201
 202         buffer_len = msg__get_packed_size(msg);
 203
 204         if (host->use_tcp)
 205                 buffer_len += 4;
 206
 207         buffer = malloc (buffer_len);
 208         if (buffer == NULL) {
 209                 ERROR ("write_riemann plugin: malloc failed.");
 210                 return ENOMEM;
 211         }
 212         memset (buffer, 0, buffer_len);
 213
 214         if (host->use_tcp)
 215         {
 216                 uint32_t length = htonl ((uint32_t) (buffer_len - 4));
 217                 memcpy (buffer, &length, 4);
 218                 msg__pack(msg, buffer + 4);
 219         }
 220         else
 221         {
 222                 msg__pack(msg, buffer);
 223         }
 224
 225         status = (int) swrite (host->s, buffer, buffer_len);
 226         if (status != 0)
 227         {
 228                 char errbuf[1024];
 229                 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s failed: %s",
 230                                 (host->node != NULL) ? host->node : RIEMANN_HOST,
 231                                 (host->service != NULL) ? host->service : RIEMANN_PORT,
 232                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 233                 sfree (buffer);
 234                 return -1;
 235         }
 236
 237         sfree (buffer);
 238         return 0;
 239 } /* }}} int riemann_send_msg */
 240
 241 static int riemann_recv_ack(struct riemann_host *host) /* {{{ */
 242 {
 243         int status = 0;
 244         Msg *msg = NULL;
 245         uint32_t header;
 246
 247         status = (int) sread (host->s, &header, 4);
 248
 249         if (status != 0)
 250                 return -1;
 251
 252         size_t size = ntohl(header);
 253
 254         // Buffer on the stack since acknowledges are typically small.
 255         u_char buffer[size];
 256         memset (buffer, 0, size);
 257
 258         status = (int) sread (host->s, buffer, size);
 259
 260         if (status != 0)
 261                 return status;
 262
 263         msg = msg__unpack (NULL, size, buffer);
 264
 265         if (msg == NULL)
 266                 return -1;
 267
 268         if (!msg->ok)
 269         {
 270                 ERROR ("write_riemann plugin: Sending to Riemann at %s:%s acknowledgement message reported error: %s",
 271                                 (host->node != NULL) ? host->node : RIEMANN_HOST,
 272                                 (host->service != NULL) ? host->service : RIEMANN_PORT,
 273                                 msg->error);
 274
 275                 msg__free_unpacked(msg, NULL);
 276                 return -1;
 277         }
 278
 279         msg__free_unpacked (msg, NULL);
 280         return 0;
 281 } /* }}} int riemann_recv_ack */
 282
 283 /**
 284  * Function to send messages (Msg) to riemann.
 285  *
 286  * Acquires the host lock, disconnects on errors.
 287  */
 288 static int riemann_send(struct riemann_host *host, Msg const *msg) /* {{{ */
 289 {
 290         int status = 0;
 291         pthread_mutex_lock (&host->lock);
 292
 293         status = riemann_send_msg(host, msg);
 294         if (status != 0) {
 295                 riemann_disconnect (host);
 296                 pthread_mutex_unlock (&host->lock);
 297                 return status;
 298         }
 299
 300         /*
 301          * For TCP we need to receive message acknowledgemenent.
 302          */
 303         if (host->use_tcp)
 304         {
 305                 status = riemann_recv_ack(host);
 306
 307                 if (status != 0)
 308                 {
 309                         riemann_disconnect (host);
 310                         pthread_mutex_unlock (&host->lock);
 311                         return status;
 312                 }
 313         }
 314
 315         pthread_mutex_unlock (&host->lock);
 316         return 0;
 317 } /* }}} int riemann_send */
 318
 319 static int riemann_event_add_tag (Event *event, char const *tag) /* {{{ */
 320 {
 321         return (strarray_add (&event->tags, &event->n_tags, tag));
 322 } /* }}} int riemann_event_add_tag */
 323
 324 static int riemann_event_add_attribute(Event *event, /* {{{ */
 325                 char const *key, char const *value)
 326 {
 327         Attribute **new_attributes;
 328         Attribute *a;
 329
 330         new_attributes = realloc (event->attributes,
 331                         sizeof (*event->attributes) * (event->n_attributes + 1));
 332         if (new_attributes == NULL)
 333         {
 334                 ERROR ("write_riemann plugin: realloc failed.");
 335                 return (ENOMEM);
 336         }
 337         event->attributes = new_attributes;
 338
 339         a = malloc (sizeof (*a));
 340         if (a == NULL)
 341         {
 342                 ERROR ("write_riemann plugin: malloc failed.");
 343                 return (ENOMEM);
 344         }
 345         attribute__init (a);
 346
 347         a->key = strdup (key);
 348         if (value != NULL)
 349                 a->value = strdup (value);
 350
 351         event->attributes[event->n_attributes] = a;
 352         event->n_attributes++;
 353
 354         return (0);
 355 } /* }}} int riemann_event_add_attribute */
 356
 357 static Msg *riemann_notification_to_protobuf(struct riemann_host *host, /* {{{ */
 358                 notification_t const *n)
 359 {
 360         Msg *msg;
 361         Event *event;
 362         char service_buffer[6 * DATA_MAX_NAME_LEN];
 363         char const *severity;
 364         notification_meta_t *meta;
 365         int i;
 366
 367         msg = malloc (sizeof (*msg));
 368         if (msg == NULL)
 369         {
 370                 ERROR ("write_riemann plugin: malloc failed.");
 371                 return (NULL);
 372         }
 373         memset (msg, 0, sizeof (*msg));
 374         msg__init (msg);
 375
 376         msg->events = malloc (sizeof (*msg->events));
 377         if (msg->events == NULL)
 378         {
 379                 ERROR ("write_riemann plugin: malloc failed.");
 380                 sfree (msg);
 381                 return (NULL);
 382         }
 383
 384         event = malloc (sizeof (*event));
 385         if (event == NULL)
 386         {
 387                 ERROR ("write_riemann plugin: malloc failed.");
 388                 sfree (msg->events);
 389                 sfree (msg);
 390                 return (NULL);
 391         }
 392         memset (event, 0, sizeof (*event));
 393         event__init (event);
 394
 395         msg->events[0] = event;
 396         msg->n_events = 1;
 397
 398         event->host = strdup (n->host);
 399         event->time = CDTIME_T_TO_TIME_T (n->time);
 400         event->has_time = 1;
 401
 402         switch (n->severity)
 403         {
 404                 case NOTIF_OKAY:        severity = "ok"; break;
 405                 case NOTIF_WARNING:     severity = "warning"; break;
 406                 case NOTIF_FAILURE:     severity = "critical"; break;
 407                 default:                severity = "unknown";
 408         }
 409         event->state = strdup (severity);
 410
 411         riemann_event_add_tag (event, "notification");
 412         if (n->host[0] != 0)
 413                 riemann_event_add_attribute (event, "host", n->host);
 414         if (n->plugin[0] != 0)
 415                 riemann_event_add_attribute (event, "plugin", n->plugin);
 416         if (n->plugin_instance[0] != 0)
 417                 riemann_event_add_attribute (event, "plugin_instance",
 418                                 n->plugin_instance);
 419
 420         if (n->type[0] != 0)
 421                 riemann_event_add_attribute (event, "type", n->type);
 422         if (n->type_instance[0] != 0)
 423                 riemann_event_add_attribute (event, "type_instance",
 424                                 n->type_instance);
 425
 426         for (i = 0; i < riemann_attrs_num; i += 2)
 427                 riemann_event_add_attribute(event,
 428                                             riemann_attrs[i],
 429                                             riemann_attrs[i +1]);
 430
 431         for (i = 0; i < riemann_tags_num; i++)
 432                 riemann_event_add_tag (event, riemann_tags[i]);
 433
 434         format_name (service_buffer, sizeof (service_buffer),
 435                         /* host = */ "", n->plugin, n->plugin_instance,
 436                         n->type, n->type_instance);
 437         event->service = strdup (&service_buffer[1]);
 438
 439         if (n->message[0] != 0)
 440                 riemann_event_add_attribute (event, "description", n->message);
 441
 442         /* Pull in values from threshold and add extra attributes */
 443         for (meta = n->meta; meta != NULL; meta = meta->next)
 444         {
 445                 if (strcasecmp ("CurrentValue", meta->name) == 0 && meta->type == NM_TYPE_DOUBLE)
 446                 {
 447                         event->metric_d = meta->nm_value.nm_double;
 448                         event->has_metric_d = 1;
 449                         continue;
 450                 }
 451
 452                 if (meta->type == NM_TYPE_STRING) {
 453                         riemann_event_add_attribute (event, meta->name, meta->nm_value.nm_string);
 454                         continue;
 455                 }
 456         }
 457
 458         DEBUG ("write_riemann plugin: Successfully created protobuf for notification: "
 459                         "host = \"%s\", service = \"%s\", state = \"%s\"",
 460                         event->host, event->service, event->state);
 461         return (msg);
 462 } /* }}} Msg *riemann_notification_to_protobuf */
 463
 464 static Event *riemann_value_to_protobuf(struct riemann_host const *host, /* {{{ */
 465                 data_set_t const *ds,
 466                 value_list_t const *vl, size_t index,
 467                                          gauge_t const *rates,
 468                                          int status)
 469 {
 470         Event *event;
 471         char name_buffer[5 * DATA_MAX_NAME_LEN];
 472         char service_buffer[6 * DATA_MAX_NAME_LEN];
 473         double ttl;
 474         int i;
 475
 476         event = malloc (sizeof (*event));
 477         if (event == NULL)
 478         {
 479                 ERROR ("write_riemann plugin: malloc failed.");
 480                 return (NULL);
 481         }
 482         memset (event, 0, sizeof (*event));
 483         event__init (event);
 484
 485         event->host = strdup (vl->host);
 486         event->time = CDTIME_T_TO_TIME_T (vl->time);
 487         event->has_time = 1;
 488
 489         if (host->check_thresholds) {
 490                 switch (status) {
 491                         case STATE_OKAY:
 492                                 event->state = strdup("ok");
 493                                 break;
 494                         case STATE_ERROR:
 495                                 event->state = strdup("critical");
 496                                 break;
 497                         case STATE_WARNING:
 498                                 event->state = strdup("warning");
 499                                 break;
 500                         case STATE_MISSING:
 501                                 event->state = strdup("unknown");
 502                                 break;
 503                 }
 504         }
 505
 506         ttl = CDTIME_T_TO_DOUBLE (vl->interval) * host->ttl_factor;
 507         event->ttl = (float) ttl;
 508         event->has_ttl = 1;
 509
 510         riemann_event_add_attribute (event, "plugin", vl->plugin);
 511         if (vl->plugin_instance[0] != 0)
 512                 riemann_event_add_attribute (event, "plugin_instance",
 513                                 vl->plugin_instance);
 514
 515         riemann_event_add_attribute (event, "type", vl->type);
 516         if (vl->type_instance[0] != 0)
 517                 riemann_event_add_attribute (event, "type_instance",
 518                                 vl->type_instance);
 519
 520         if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
 521         {
 522                 char ds_type[DATA_MAX_NAME_LEN];
 523
 524                 ssnprintf (ds_type, sizeof (ds_type), "%s:rate",
 525                                 DS_TYPE_TO_STRING(ds->ds[index].type));
 526                 riemann_event_add_attribute (event, "ds_type", ds_type);
 527         }
 528         else
 529         {
 530                 riemann_event_add_attribute (event, "ds_type",
 531                                 DS_TYPE_TO_STRING(ds->ds[index].type));
 532         }
 533         riemann_event_add_attribute (event, "ds_name", ds->ds[index].name);
 534         {
 535                 char ds_index[DATA_MAX_NAME_LEN];
 536
 537                 ssnprintf (ds_index, sizeof (ds_index), "%zu", index);
 538                 riemann_event_add_attribute (event, "ds_index", ds_index);
 539         }
 540
 541         for (i = 0; i < riemann_attrs_num; i += 2)
 542                 riemann_event_add_attribute(event,
 543                                             riemann_attrs[i],
 544                                             riemann_attrs[i +1]);
 545
 546         for (i = 0; i < riemann_tags_num; i++)
 547                 riemann_event_add_tag (event, riemann_tags[i]);
 548
 549         if (ds->ds[index].type == DS_TYPE_GAUGE)
 550         {
 551                 event->has_metric_d = 1;
 552                 event->metric_d = (double) vl->values[index].gauge;
 553         }
 554         else if (rates != NULL)
 555         {
 556                 event->has_metric_d = 1;
 557                 event->metric_d = (double) rates[index];
 558         }
 559         else
 560         {
 561                 event->has_metric_sint64 = 1;
 562                 if (ds->ds[index].type == DS_TYPE_DERIVE)
 563                         event->metric_sint64 = (int64_t) vl->values[index].derive;
 564                 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
 565                         event->metric_sint64 = (int64_t) vl->values[index].absolute;
 566                 else
 567                         event->metric_sint64 = (int64_t) vl->values[index].counter;
 568         }
 569
 570         format_name (name_buffer, sizeof (name_buffer),
 571                         /* host = */ "", vl->plugin, vl->plugin_instance,
 572                         vl->type, vl->type_instance);
 573         if (host->always_append_ds || (ds->ds_num > 1))
 574         {
 575                 if (host->event_service_prefix == NULL)
 576                         ssnprintf (service_buffer, sizeof (service_buffer), "%s/%s",
 577                                         &name_buffer[1], ds->ds[index].name);
 578                 else
 579                         ssnprintf (service_buffer, sizeof (service_buffer), "%s%s/%s",
 580                                         host->event_service_prefix, &name_buffer[1], ds->ds[index].name);
 581         }
 582         else
 583         {
 584                 if (host->event_service_prefix == NULL)
 585                         sstrncpy (service_buffer, &name_buffer[1], sizeof (service_buffer));
 586                 else
 587                         ssnprintf (service_buffer, sizeof (service_buffer), "%s%s",
 588                                         host->event_service_prefix, &name_buffer[1]);
 589         }
 590
 591         event->service = strdup (service_buffer);
 592
 593         DEBUG ("write_riemann plugin: Successfully created protobuf for metric: "
 594                         "host = \"%s\", service = \"%s\"",
 595                         event->host, event->service);
 596         return (event);
 597 } /* }}} Event *riemann_value_to_protobuf */
 598
 599 static Msg *riemann_value_list_to_protobuf (struct riemann_host const *host, /* {{{ */
 600                                             data_set_t const *ds,
 601                                             value_list_t const *vl,
 602                                             int *statuses)
 603 {
 604         Msg *msg;
 605         size_t i;
 606         gauge_t *rates = NULL;
 607
 608         /* Initialize the Msg structure. */
 609         msg = malloc (sizeof (*msg));
 610         if (msg == NULL)
 611         {
 612                 ERROR ("write_riemann plugin: malloc failed.");
 613                 return (NULL);
 614         }
 615         memset (msg, 0, sizeof (*msg));
 616         msg__init (msg);
 617
 618         /* Set up events. First, the list of pointers. */
 619         msg->n_events = (size_t) vl->values_len;
 620         msg->events = calloc (msg->n_events, sizeof (*msg->events));
 621         if (msg->events == NULL)
 622         {
 623                 ERROR ("write_riemann plugin: calloc failed.");
 624                 riemann_msg_protobuf_free (msg);
 625                 return (NULL);
 626         }
 627
 628         if (host->store_rates)
 629         {
 630                 rates = uc_get_rate (ds, vl);
 631                 if (rates == NULL)
 632                 {
 633                         ERROR ("write_riemann plugin: uc_get_rate failed.");
 634                         riemann_msg_protobuf_free (msg);
 635                         return (NULL);
 636                 }
 637         }
 638
 639         for (i = 0; i < msg->n_events; i++)
 640         {
 641                 msg->events[i] = riemann_value_to_protobuf (host, ds, vl,
 642                                                             (int) i, rates, statuses[i]);
 643                 if (msg->events[i] == NULL)
 644                 {
 645                         riemann_msg_protobuf_free (msg);
 646                         sfree (rates);
 647                         return (NULL);
 648                 }
 649         }
 650
 651         sfree (rates);
 652         return (msg);
 653 } /* }}} Msg *riemann_value_list_to_protobuf */
 654
 655
 656 /*
 657  * Always call while holding host->lock !
 658  */
 659 static int riemann_batch_flush_nolock (cdtime_t timeout,
 660                                        struct riemann_host *host)
 661 {
 662     cdtime_t    now;
 663     int         status = 0;
 664
 665     if (timeout > 0) {
 666         now = cdtime ();
 667         if ((host->batch_init + timeout) > now)
 668             return status;
 669     }
 670     riemann_send_msg(host, host->batch_msg);
 671     riemann_msg_protobuf_free(host->batch_msg);
 672
 673         if (host->use_tcp && ((status = riemann_recv_ack(host)) != 0))
 674         riemann_disconnect (host);
 675
 676     host->batch_init = cdtime();
 677     host->batch_msg = NULL;
 678     return status;
 679 }
 680
 681 static int riemann_batch_flush (cdtime_t timeout,
 682         const char *identifier __attribute__((unused)),
 683         user_data_t *user_data)
 684 {
 685     struct riemann_host *host;
 686     int status;
 687
 688     if (user_data == NULL)
 689         return (-EINVAL);
 690
 691     host = user_data->data;
 692     pthread_mutex_lock (&host->lock);
 693     status = riemann_batch_flush_nolock (timeout, host);
 694     if (status != 0)
 695         ERROR ("write_riemann plugin: riemann_send failed with status %i",
 696                status);
 697
 698     pthread_mutex_unlock(&host->lock);
 699     return status;
 700 }
 701
 702 static int riemann_batch_add_value_list (struct riemann_host *host, /* {{{ */
 703                                          data_set_t const *ds,
 704                                          value_list_t const *vl,
 705                                          int *statuses)
 706 {
 707         size_t i;
 708     Event **events;
 709     Msg *msg;
 710     size_t len;
 711     int ret;
 712
 713     msg = riemann_value_list_to_protobuf (host, ds, vl, statuses);
 714     if (msg == NULL)
 715         return -1;
 716
 717     pthread_mutex_lock(&host->lock);
 718
 719     if (host->batch_msg == NULL) {
 720         host->batch_msg = msg;
 721     } else {
 722         len = msg->n_events + host->batch_msg->n_events;
 723         events = realloc(host->batch_msg->events,
 724                          (len * sizeof(*host->batch_msg->events)));
 725         if (events == NULL) {
 726             pthread_mutex_unlock(&host->lock);
 727             ERROR ("write_riemann plugin: out of memory");
 728             riemann_msg_protobuf_free (msg);
 729             return -1;
 730         }
 731         host->batch_msg->events = events;
 732
 733         for (i = host->batch_msg->n_events; i < len; i++)
 734             host->batch_msg->events[i] = msg->events[i - host->batch_msg->n_events];
 735
 736         host->batch_msg->n_events = len;
 737         sfree (msg->events);
 738         msg->n_events = 0;
 739         sfree (msg);
 740     }
 741
 742         len = msg__get_packed_size(host->batch_msg);
 743     ret = 0;
 744     if (len >= host->batch_max) {
 745         ret = riemann_batch_flush_nolock(0, host);
 746     }
 747
 748     pthread_mutex_unlock(&host->lock);
 749     return ret;
 750 } /* }}} Msg *riemann_batch_add_value_list */
 751
 752 static int riemann_notification(const notification_t *n, user_data_t *ud) /* {{{ */
 753 {
 754         int                      status;
 755         struct riemann_host     *host = ud->data;
 756         Msg                     *msg;
 757
 758         if (!host->notifications)
 759                 return 0;
 760
 761     /*
 762      * Never batch for notifications, send them ASAP
 763      */
 764         msg = riemann_notification_to_protobuf (host, n);
 765         if (msg == NULL)
 766                 return (-1);
 767
 768         status = riemann_send (host, msg);
 769         if (status != 0)
 770                 ERROR ("write_riemann plugin: riemann_send failed with status %i",
 771                                 status);
 772
 773         riemann_msg_protobuf_free (msg);
 774         return (status);
 775 } /* }}} int riemann_notification */
 776
 777 static int riemann_write(const data_set_t *ds, /* {{{ */
 778               const value_list_t *vl,
 779               user_data_t *ud)
 780 {
 781         int                      status = 0;
 782         int                      statuses[vl->values_len];
 783         struct riemann_host     *host = ud->data;
 784         Msg                     *msg;
 785
 786         if (host->check_thresholds)
 787                 write_riemann_threshold_check(ds, vl, statuses);
 788
 789     if (host->use_tcp == 1 && host->batch_mode) {
 790
 791         riemann_batch_add_value_list (host, ds, vl, statuses);
 792
 793
 794     } else {
 795
 796         msg = riemann_value_list_to_protobuf (host, ds, vl, statuses);
 797         if (msg == NULL)
 798             return (-1);
 799
 800         status = riemann_send (host, msg);
 801         if (status != 0)
 802             ERROR ("write_riemann plugin: riemann_send failed with status %i",
 803                    status);
 804
 805         riemann_msg_protobuf_free (msg);
 806     }
 807         return status;
 808 } /* }}} int riemann_write */
 809
 810 static void riemann_free(void *p) /* {{{ */
 811 {
 812         struct riemann_host     *host = p;
 813
 814         if (host == NULL)
 815                 return;
 816
 817         pthread_mutex_lock (&host->lock);
 818
 819         host->reference_count--;
 820         if (host->reference_count > 0)
 821         {
 822                 pthread_mutex_unlock (&host->lock);
 823                 return;
 824         }
 825
 826         riemann_disconnect (host);
 827
 828         sfree(host->service);
 829         pthread_mutex_destroy (&host->lock);
 830         sfree(host);
 831 } /* }}} void riemann_free */
 832
 833 static int riemann_config_node(oconfig_item_t *ci) /* {{{ */
 834 {
 835         struct riemann_host     *host = NULL;
 836         int                      status = 0;
 837         int                      i;
 838         oconfig_item_t          *child;
 839         char                     callback_name[DATA_MAX_NAME_LEN];
 840         user_data_t              ud;
 841
 842         if ((host = calloc(1, sizeof (*host))) == NULL) {
 843                 ERROR ("write_riemann plugin: calloc failed.");
 844                 return ENOMEM;
 845         }
 846         pthread_mutex_init (&host->lock, NULL);
 847         host->reference_count = 1;
 848         host->node = NULL;
 849         host->service = NULL;
 850         host->notifications = 1;
 851         host->check_thresholds = 0;
 852         host->store_rates = 1;
 853         host->always_append_ds = 0;
 854         host->use_tcp = 1;
 855         host->batch_mode = 1;
 856         host->batch_max = RIEMANN_BATCH_MAX; /* typical MSS */
 857         host->batch_init = cdtime();
 858         host->ttl_factor = RIEMANN_TTL_FACTOR;
 859
 860         status = cf_util_get_string (ci, &host->name);
 861         if (status != 0) {
 862                 WARNING("write_riemann plugin: Required host name is missing.");
 863                 riemann_free (host);
 864                 return -1;
 865         }
 866
 867         for (i = 0; i < ci->children_num; i++) {
 868                 /*
 869                  * The code here could be simplified but makes room
 870                  * for easy adding of new options later on.
 871                  */
 872                 child = &ci->children[i];
 873                 status = 0;
 874
 875                 if (strcasecmp ("Host", child->key) == 0) {
 876                         status = cf_util_get_string (child, &host->node);
 877                         if (status != 0)
 878                                 break;
 879                 } else if (strcasecmp ("Notifications", child->key) == 0) {
 880                         status = cf_util_get_boolean(child, &host->notifications);
 881                         if (status != 0)
 882                                 break;
 883                 } else if (strcasecmp ("EventServicePrefix", child->key) == 0) {
 884                         status = cf_util_get_string (child, &host->event_service_prefix);
 885                         if (status != 0)
 886                                 break;
 887                 } else if (strcasecmp ("CheckThresholds", child->key) == 0) {
 888                         status = cf_util_get_boolean(child, &host->check_thresholds);
 889                         if (status != 0)
 890                                 break;
 891         } else if (strcasecmp ("Batch", child->key) == 0) {
 892             status = cf_util_get_boolean(child, &host->batch_mode);
 893             if (status != 0)
 894                 break;
 895         } else if (strcasecmp("BatchMaxSize", child->key) == 0) {
 896             status = cf_util_get_int(child, &host->batch_max);
 897             if (status != 0)
 898                 break;
 899                 } else if (strcasecmp ("Port", child->key) == 0) {
 900                         status = cf_util_get_service (child, &host->service);
 901                         if (status != 0) {
 902                                 ERROR ("write_riemann plugin: Invalid argument "
 903                                                 "configured for the \"Port\" "
 904                                                 "option.");
 905                                 break;
 906                         }
 907                 } else if (strcasecmp ("Protocol", child->key) == 0) {
 908                         char tmp[16];
 909                         status = cf_util_get_string_buffer (child,
 910                                         tmp, sizeof (tmp));
 911                         if (status != 0)
 912                         {
 913                                 ERROR ("write_riemann plugin: cf_util_get_"
 914                                                 "string_buffer failed with "
 915                                                 "status %i.", status);
 916                                 break;
 917                         }
 918
 919                         if (strcasecmp ("UDP", tmp) == 0)
 920                                 host->use_tcp = 0;
 921                         else if (strcasecmp ("TCP", tmp) == 0)
 922                                 host->use_tcp = 1;
 923                         else
 924                                 WARNING ("write_riemann plugin: The value "
 925                                                 "\"%s\" is not valid for the "
 926                                                 "\"Protocol\" option. Use "
 927                                                 "either \"UDP\" or \"TCP\".",
 928                                                 tmp);
 929                 } else if (strcasecmp ("StoreRates", child->key) == 0) {
 930                         status = cf_util_get_boolean (child, &host->store_rates);
 931                         if (status != 0)
 932                                 break;
 933                 } else if (strcasecmp ("AlwaysAppendDS", child->key) == 0) {
 934                         status = cf_util_get_boolean (child,
 935                                         &host->always_append_ds);
 936                         if (status != 0)
 937                                 break;
 938                 } else if (strcasecmp ("TTLFactor", child->key) == 0) {
 939                         double tmp = NAN;
 940                         status = cf_util_get_double (child, &tmp);
 941                         if (status != 0)
 942                                 break;
 943                         if (tmp >= 2.0) {
 944                                 host->ttl_factor = tmp;
 945                         } else if (tmp >= 1.0) {
 946                                 NOTICE ("write_riemann plugin: The configured "
 947                                                 "TTLFactor is very small "
 948                                                 "(%.1f). A value of 2.0 or "
 949                                                 "greater is recommended.",
 950                                                 tmp);
 951                                 host->ttl_factor = tmp;
 952                         } else if (tmp > 0.0) {
 953                                 WARNING ("write_riemann plugin: The configured "
 954                                                 "TTLFactor is too small to be "
 955                                                 "useful (%.1f). I'll use it "
 956                                                 "since the user knows best, "
 957                                                 "but under protest.",
 958                                                 tmp);
 959                                 host->ttl_factor = tmp;
 960                         } else { /* zero, negative and NAN */
 961                                 ERROR ("write_riemann plugin: The configured "
 962                                                 "TTLFactor is invalid (%.1f).",
 963                                                 tmp);
 964                         }
 965                 } else {
 966                         WARNING("write_riemann plugin: ignoring unknown config "
 967                                 "option: \"%s\"", child->key);
 968                 }
 969         }
 970         if (status != 0) {
 971                 riemann_free (host);
 972                 return status;
 973         }
 974
 975         ssnprintf (callback_name, sizeof (callback_name), "write_riemann/%s",
 976                         host->name);
 977         ud.data = host;
 978         ud.free_func = riemann_free;
 979
 980         pthread_mutex_lock (&host->lock);
 981
 982         status = plugin_register_write (callback_name, riemann_write, &ud);
 983
 984     if (host->use_tcp == 1 && host->batch_mode) {
 985         ud.free_func = NULL;
 986         plugin_register_flush(callback_name, riemann_batch_flush, &ud);
 987     }
 988         if (status != 0)
 989                 WARNING ("write_riemann plugin: plugin_register_write (\"%s\") "
 990                                 "failed with status %i.",
 991                                 callback_name, status);
 992         else /* success */
 993                 host->reference_count++;
 994
 995         status = plugin_register_notification (callback_name,
 996                         riemann_notification, &ud);
 997         if (status != 0)
 998                 WARNING ("write_riemann plugin: plugin_register_notification (\"%s\") "
 999                                 "failed with status %i.",
1000                                 callback_name, status);
1001         else /* success */
1002                 host->reference_count++;
1003
1004         if (host->reference_count <= 1)
1005         {
1006                 /* Both callbacks failed => free memory.
1007                  * We need to unlock here, because riemann_free() will lock.
1008                  * This is not a race condition, because we're the only one
1009                  * holding a reference. */
1010                 pthread_mutex_unlock (&host->lock);
1011                 riemann_free (host);
1012                 return (-1);
1013         }
1014
1015         host->reference_count--;
1016         pthread_mutex_unlock (&host->lock);
1017
1018         return status;
1019 } /* }}} int riemann_config_node */
1020
1021 static int riemann_config(oconfig_item_t *ci) /* {{{ */
1022 {
1023         int              i;
1024         oconfig_item_t  *child;
1025         int              status;
1026
1027         for (i = 0; i < ci->children_num; i++)  {
1028                 child = &ci->children[i];
1029
1030                 if (strcasecmp("Node", child->key) == 0) {
1031                         riemann_config_node (child);
1032                 } else if (strcasecmp(child->key, "attribute") == 0) {
1033                         char *key = NULL;
1034                         char *val = NULL;
1035
1036                         if (child->values_num != 2) {
1037                                 WARNING("riemann attributes need both a key and a value.");
1038                                 return (-1);
1039                         }
1040                         if (child->values[0].type != OCONFIG_TYPE_STRING ||
1041                             child->values[1].type != OCONFIG_TYPE_STRING) {
1042                                 WARNING("riemann attribute needs string arguments.");
1043                                 return (-1);
1044                         }
1045                         if ((key = strdup(child->values[0].value.string)) == NULL) {
1046                                 WARNING("cannot allocate memory for attribute key.");
1047                                 return (-1);
1048                         }
1049                         if ((val = strdup(child->values[1].value.string)) == NULL) {
1050                                 WARNING("cannot allocate memory for attribute value.");
1051                                 sfree (key);
1052                                 return (-1);
1053                         }
1054                         strarray_add(&riemann_attrs, &riemann_attrs_num, key);
1055                         strarray_add(&riemann_attrs, &riemann_attrs_num, val);
1056                         DEBUG("write_riemann: got attr: %s => %s", key, val);
1057                         sfree(key);
1058                         sfree(val);
1059                 } else if (strcasecmp(child->key, "tag") == 0) {
1060                         char *tmp = NULL;
1061                         status = cf_util_get_string(child, &tmp);
1062                         if (status != 0)
1063                                 continue;
1064
1065                         strarray_add (&riemann_tags, &riemann_tags_num, tmp);
1066                         DEBUG("write_riemann plugin: Got tag: %s", tmp);
1067                         sfree (tmp);
1068                 } else {
1069                         WARNING ("write_riemann plugin: Ignoring unknown "
1070                                  "configuration option \"%s\" at top level.",
1071                                  child->key);
1072                 }
1073         }
1074         return (0);
1075 } /* }}} int riemann_config */
1076
1077 void module_register(void)
1078 {
1079         plugin_register_complex_config ("write_riemann", riemann_config);
1080 }
1081
1082 /* vim: set sw=8 sts=8 ts=8 noet : */