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  * Copyright (C) 2015,2016  Gergely Nagy
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *   Pierre-Yves Ritschard <pyr at spootnik.org>
  27  *   Florian octo Forster <octo at collectd.org>
  28  *   Gergely Nagy <algernon at madhouse-project.org>
  29  */
  30
  31 #include <riemann/riemann-client.h>
  32 #include <errno.h>
  33 #include <pthread.h>
  34
  35 #include "collectd.h"
  36 #include "plugin.h"
  37 #include "common.h"
  38 #include "configfile.h"
  39 #include "utils_cache.h"
  40 #include "utils_complain.h"
  41 #include "write_riemann_threshold.h"
  42
  43 #define RIEMANN_HOST            "localhost"
  44 #define RIEMANN_PORT            5555
  45 #define RIEMANN_TTL_FACTOR      2.0
  46 #define RIEMANN_BATCH_MAX      8192
  47
  48 struct riemann_host {
  49     c_complain_t init_complaint;
  50         char                    *name;
  51         char                    *event_service_prefix;
  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         int                      port;
  60         riemann_client_type_t    client_type;
  61         riemann_client_t        *client;
  62         double                   ttl_factor;
  63     cdtime_t         batch_init;
  64     int              batch_max;
  65     int              batch_timeout;
  66         int                          reference_count;
  67   riemann_message_t     *batch_msg;
  68         char                     *tls_ca_file;
  69         char                     *tls_cert_file;
  70         char                     *tls_key_file;
  71         struct timeval timeout;
  72 };
  73
  74 static char     **riemann_tags;
  75 static size_t     riemann_tags_num;
  76 static char     **riemann_attrs;
  77 static size_t     riemann_attrs_num;
  78
  79 /* host->lock must be held when calling this function. */
  80 static int wrr_connect(struct riemann_host *host) /* {{{ */
  81 {
  82         char const              *node;
  83         int                      port;
  84
  85         if (host->client)
  86                 return 0;
  87
  88         node = (host->node != NULL) ? host->node : RIEMANN_HOST;
  89         port = (host->port) ? host->port : RIEMANN_PORT;
  90
  91         host->client = NULL;
  92
  93         host->client = riemann_client_create(host->client_type, node, port,
  94                                              RIEMANN_CLIENT_OPTION_TLS_CA_FILE, host->tls_ca_file,
  95                                              RIEMANN_CLIENT_OPTION_TLS_CERT_FILE, host->tls_cert_file,
  96                                              RIEMANN_CLIENT_OPTION_TLS_KEY_FILE, host->tls_key_file,
  97                                              RIEMANN_CLIENT_OPTION_NONE);
  98         if (host->client == NULL) {
  99         c_complain (LOG_ERR, &host->init_complaint,
 100                     "write_riemann plugin: Unable to connect to Riemann at %s:%d",
 101                     node, port);
 102                 return -1;
 103         }
 104         if (host->timeout.tv_sec != 0) {
 105                 if (riemann_client_set_timeout(host->client, &host->timeout) != 0) {
 106                         riemann_client_free(host->client);
 107                         host->client = NULL;
 108             c_complain (LOG_ERR, &host->init_complaint,
 109                         "write_riemann plugin: Unable to connect to Riemann at %s:%d",
 110                         node, port);
 111                         return -1;
 112                 }
 113         }
 114
 115     c_release (LOG_INFO, &host->init_complaint,
 116                "write_riemann plugin: Successfully connected to %s:%d",
 117                node, port);
 118
 119         return 0;
 120 } /* }}} int wrr_connect */
 121
 122 /* host->lock must be held when calling this function. */
 123 static int wrr_disconnect(struct riemann_host *host) /* {{{ */
 124 {
 125         if (!host->client)
 126                 return (0);
 127
 128         riemann_client_free(host->client);
 129         host->client = NULL;
 130
 131         return (0);
 132 } /* }}} int wrr_disconnect */
 133
 134 /**
 135  * Function to send messages to riemann.
 136  *
 137  * Acquires the host lock, disconnects on errors.
 138  */
 139 static int wrr_send_nolock(struct riemann_host *host, riemann_message_t *msg) /* {{{ */
 140 {
 141         int status = 0;
 142
 143         status = wrr_connect(host);
 144         if (status != 0) {
 145                 return status;
 146     }
 147
 148         status = riemann_client_send_message(host->client, msg);
 149         if (status != 0) {
 150                 wrr_disconnect(host);
 151                 return status;
 152         }
 153
 154         /*
 155          * For TCP we need to receive message acknowledgemenent.
 156          */
 157         if (host->client_type != RIEMANN_CLIENT_UDP)
 158         {
 159                 riemann_message_t *response;
 160
 161                 response = riemann_client_recv_message(host->client);
 162
 163                 if (response == NULL)
 164                 {
 165                         wrr_disconnect(host);
 166                         return errno;
 167                 }
 168                 riemann_message_free(response);
 169         }
 170
 171         return 0;
 172 } /* }}} int wrr_send */
 173
 174 static int wrr_send(struct riemann_host *host, riemann_message_t *msg)
 175 {
 176     int status = 0;
 177
 178     pthread_mutex_lock (&host->lock);
 179     status = wrr_send_nolock(host, msg);
 180     pthread_mutex_unlock (&host->lock);
 181     return status;
 182 }
 183
 184 static riemann_message_t *wrr_notification_to_message(struct riemann_host *host, /* {{{ */
 185                 notification_t const *n)
 186 {
 187         riemann_message_t *msg;
 188         riemann_event_t *event;
 189         char service_buffer[6 * DATA_MAX_NAME_LEN];
 190         char const *severity;
 191         notification_meta_t *meta;
 192         size_t i;
 193
 194         switch (n->severity)
 195         {
 196                 case NOTIF_OKAY:        severity = "ok"; break;
 197                 case NOTIF_WARNING:     severity = "warning"; break;
 198                 case NOTIF_FAILURE:     severity = "critical"; break;
 199                 default:                severity = "unknown";
 200         }
 201
 202         format_name(service_buffer, sizeof(service_buffer),
 203                     /* host = */ "", n->plugin, n->plugin_instance,
 204                     n->type, n->type_instance);
 205
 206         event = riemann_event_create(RIEMANN_EVENT_FIELD_HOST, n->host,
 207                                      RIEMANN_EVENT_FIELD_TIME, (int64_t) CDTIME_T_TO_TIME_T(n->time),
 208                                      RIEMANN_EVENT_FIELD_TAGS, "notification", NULL,
 209                                      RIEMANN_EVENT_FIELD_STATE, severity,
 210                                      RIEMANN_EVENT_FIELD_SERVICE, &service_buffer[1],
 211                                      RIEMANN_EVENT_FIELD_NONE);
 212
 213         if (n->host[0] != 0)
 214                 riemann_event_string_attribute_add(event, "host", n->host);
 215         if (n->plugin[0] != 0)
 216                 riemann_event_string_attribute_add(event, "plugin", n->plugin);
 217         if (n->plugin_instance[0] != 0)
 218                 riemann_event_string_attribute_add(event, "plugin_instance", n->plugin_instance);
 219
 220         if (n->type[0] != 0)
 221                 riemann_event_string_attribute_add(event, "type", n->type);
 222         if (n->type_instance[0] != 0)
 223                 riemann_event_string_attribute_add(event, "type_instance", n->type_instance);
 224
 225         for (i = 0; i < riemann_attrs_num; i += 2)
 226                 riemann_event_string_attribute_add(event, riemann_attrs[i], riemann_attrs[i+1]);
 227
 228         for (i = 0; i < riemann_tags_num; i++)
 229                 riemann_event_tag_add(event, riemann_tags[i]);
 230
 231         if (n->message[0] != 0)
 232                 riemann_event_string_attribute_add(event, "description", n->message);
 233
 234         /* Pull in values from threshold and add extra attributes */
 235         for (meta = n->meta; meta != NULL; meta = meta->next)
 236         {
 237                 if (strcasecmp("CurrentValue", meta->name) == 0 && meta->type == NM_TYPE_DOUBLE)
 238                 {
 239                         riemann_event_set(event,
 240                                           RIEMANN_EVENT_FIELD_METRIC_D,
 241                                           (double) meta->nm_value.nm_double,
 242                                           RIEMANN_EVENT_FIELD_NONE);
 243                         continue;
 244                 }
 245
 246                 if (meta->type == NM_TYPE_STRING) {
 247                         riemann_event_string_attribute_add(event, meta->name, meta->nm_value.nm_string);
 248                         continue;
 249                 }
 250         }
 251
 252         msg = riemann_message_create_with_events(event, NULL);
 253         if (msg == NULL)
 254         {
 255                 ERROR("write_riemann plugin: riemann_message_create_with_events() failed.");
 256                 riemann_event_free (event);
 257                 return (NULL);
 258         }
 259
 260         DEBUG("write_riemann plugin: Successfully created message for notification: "
 261               "host = \"%s\", service = \"%s\", state = \"%s\"",
 262               event->host, event->service, event->state);
 263         return (msg);
 264 } /* }}} riemann_message_t *wrr_notification_to_message */
 265
 266 static riemann_event_t *wrr_value_to_event(struct riemann_host const *host, /* {{{ */
 267                                            data_set_t const *ds,
 268                                            value_list_t const *vl, size_t index,
 269                                            gauge_t const *rates,
 270                                            int status)
 271 {
 272         riemann_event_t *event;
 273         char name_buffer[5 * DATA_MAX_NAME_LEN];
 274         char service_buffer[6 * DATA_MAX_NAME_LEN];
 275         size_t i;
 276
 277         event = riemann_event_new();
 278         if (event == NULL)
 279         {
 280                 ERROR("write_riemann plugin: riemann_event_new() failed.");
 281                 return (NULL);
 282         }
 283
 284         format_name(name_buffer, sizeof(name_buffer),
 285                     /* host = */ "", vl->plugin, vl->plugin_instance,
 286                     vl->type, vl->type_instance);
 287         if (host->always_append_ds || (ds->ds_num > 1))
 288         {
 289                 if (host->event_service_prefix == NULL)
 290                         ssnprintf(service_buffer, sizeof(service_buffer), "%s/%s",
 291                                   &name_buffer[1], ds->ds[index].name);
 292                 else
 293                         ssnprintf(service_buffer, sizeof(service_buffer), "%s%s/%s",
 294                                   host->event_service_prefix, &name_buffer[1], ds->ds[index].name);
 295         }
 296         else
 297         {
 298                 if (host->event_service_prefix == NULL)
 299                         sstrncpy(service_buffer, &name_buffer[1], sizeof(service_buffer));
 300                 else
 301                         ssnprintf(service_buffer, sizeof(service_buffer), "%s%s",
 302                                   host->event_service_prefix, &name_buffer[1]);
 303         }
 304
 305         riemann_event_set(event,
 306                           RIEMANN_EVENT_FIELD_HOST, vl->host,
 307                           RIEMANN_EVENT_FIELD_TIME, (int64_t) CDTIME_T_TO_TIME_T(vl->time),
 308                           RIEMANN_EVENT_FIELD_TTL, (float) CDTIME_T_TO_DOUBLE(vl->interval) * host->ttl_factor,
 309                           RIEMANN_EVENT_FIELD_STRING_ATTRIBUTES,
 310                           "plugin", vl->plugin,
 311                           "type", vl->type,
 312                           "ds_name", ds->ds[index].name,
 313                           NULL,
 314                           RIEMANN_EVENT_FIELD_SERVICE, service_buffer,
 315                           RIEMANN_EVENT_FIELD_NONE);
 316
 317         if (host->check_thresholds) {
 318                 const char *state = NULL;
 319
 320                 switch (status) {
 321                         case STATE_OKAY:
 322                                 state = "ok";
 323                                 break;
 324                         case STATE_ERROR:
 325                                 state = "critical";
 326                                 break;
 327                         case STATE_WARNING:
 328                                 state = "warning";
 329                                 break;
 330                         case STATE_MISSING:
 331                                 state = "unknown";
 332                                 break;
 333                 }
 334                 if (state)
 335                         riemann_event_set(event, RIEMANN_EVENT_FIELD_STATE, state,
 336                                           RIEMANN_EVENT_FIELD_NONE);
 337         }
 338
 339         if (vl->plugin_instance[0] != 0)
 340                 riemann_event_string_attribute_add(event, "plugin_instance", vl->plugin_instance);
 341         if (vl->type_instance[0] != 0)
 342                 riemann_event_string_attribute_add(event, "type_instance", vl->type_instance);
 343
 344         if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
 345         {
 346                 char ds_type[DATA_MAX_NAME_LEN];
 347
 348                 ssnprintf(ds_type, sizeof(ds_type), "%s:rate",
 349                           DS_TYPE_TO_STRING(ds->ds[index].type));
 350                 riemann_event_string_attribute_add(event, "ds_type", ds_type);
 351         }
 352         else
 353         {
 354                 riemann_event_string_attribute_add(event, "ds_type",
 355                                        DS_TYPE_TO_STRING(ds->ds[index].type));
 356         }
 357
 358         {
 359                 char ds_index[DATA_MAX_NAME_LEN];
 360
 361                 ssnprintf(ds_index, sizeof(ds_index), "%zu", index);
 362                 riemann_event_string_attribute_add(event, "ds_index", ds_index);
 363         }
 364
 365         for (i = 0; i < riemann_attrs_num; i += 2)
 366                 riemann_event_string_attribute_add(event, riemann_attrs[i], riemann_attrs[i +1]);
 367
 368         for (i = 0; i < riemann_tags_num; i++)
 369                 riemann_event_tag_add(event, riemann_tags[i]);
 370
 371         if (ds->ds[index].type == DS_TYPE_GAUGE)
 372         {
 373                 riemann_event_set(event,
 374                                   RIEMANN_EVENT_FIELD_METRIC_D,
 375                                   (double) vl->values[index].gauge,
 376                                   RIEMANN_EVENT_FIELD_NONE);
 377         }
 378         else if (rates != NULL)
 379         {
 380                 riemann_event_set(event,
 381                                   RIEMANN_EVENT_FIELD_METRIC_D,
 382                                   (double) rates[index],
 383                                   RIEMANN_EVENT_FIELD_NONE);
 384         }
 385         else
 386         {
 387                 int64_t metric;
 388
 389                 if (ds->ds[index].type == DS_TYPE_DERIVE)
 390                         metric = (int64_t) vl->values[index].derive;
 391                 else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
 392                         metric = (int64_t) vl->values[index].absolute;
 393                 else
 394                         metric = (int64_t) vl->values[index].counter;
 395
 396                 riemann_event_set(event,
 397                                   RIEMANN_EVENT_FIELD_METRIC_S64,
 398                                   (int64_t) metric,
 399                                   RIEMANN_EVENT_FIELD_NONE);
 400         }
 401
 402         DEBUG("write_riemann plugin: Successfully created message for metric: "
 403               "host = \"%s\", service = \"%s\"",
 404               event->host, event->service);
 405         return (event);
 406 } /* }}} riemann_event_t *wrr_value_to_event */
 407
 408 static riemann_message_t *wrr_value_list_to_message(struct riemann_host const *host, /* {{{ */
 409                                                     data_set_t const *ds,
 410                                                     value_list_t const *vl,
 411                                                     int *statuses)
 412 {
 413         riemann_message_t *msg;
 414         size_t i;
 415         gauge_t *rates = NULL;
 416
 417         /* Initialize the Msg structure. */
 418         msg = riemann_message_new();
 419         if (msg == NULL)
 420         {
 421                 ERROR ("write_riemann plugin: riemann_message_new failed.");
 422                 return (NULL);
 423         }
 424
 425         if (host->store_rates)
 426         {
 427                 rates = uc_get_rate(ds, vl);
 428                 if (rates == NULL)
 429                 {
 430                         ERROR("write_riemann plugin: uc_get_rate failed.");
 431                         riemann_message_free(msg);
 432                         return (NULL);
 433                 }
 434         }
 435
 436         for (i = 0; i < vl->values_len; i++)
 437         {
 438                 riemann_event_t *event;
 439
 440                 event = wrr_value_to_event(host, ds, vl,
 441                                            (int) i, rates, statuses[i]);
 442                 if (event == NULL)
 443                 {
 444                         riemann_message_free(msg);
 445                         sfree(rates);
 446                         return (NULL);
 447                 }
 448                 riemann_message_append_events(msg, event, NULL);
 449         }
 450
 451         sfree(rates);
 452         return (msg);
 453 } /* }}} riemann_message_t *wrr_value_list_to_message */
 454
 455 /*
 456  * Always call while holding host->lock !
 457  */
 458 static int wrr_batch_flush_nolock(cdtime_t timeout,
 459                                   struct riemann_host *host)
 460 {
 461         cdtime_t    now;
 462         int         status = 0;
 463
 464     now = cdtime();
 465         if (timeout > 0) {
 466                 if ((host->batch_init + timeout) > now) {
 467                         return status;
 468         }
 469         }
 470         wrr_send_nolock(host, host->batch_msg);
 471         riemann_message_free(host->batch_msg);
 472
 473         host->batch_init = now;
 474         host->batch_msg = NULL;
 475         return status;
 476 }
 477
 478 static int wrr_batch_flush(cdtime_t timeout,
 479         const char *identifier __attribute__((unused)),
 480         user_data_t *user_data)
 481 {
 482         struct riemann_host *host;
 483         int status;
 484
 485         if (user_data == NULL)
 486                 return (-EINVAL);
 487
 488         host = user_data->data;
 489         pthread_mutex_lock(&host->lock);
 490         status = wrr_batch_flush_nolock(timeout, host);
 491         if (status != 0)
 492         c_complain (LOG_ERR, &host->init_complaint,
 493                     "write_riemann plugin: riemann_client_send failed with status %i",
 494                     status);
 495     else
 496         c_release (LOG_DEBUG, &host->init_complaint, "write_riemann plugin: batch sent.");
 497
 498         pthread_mutex_unlock(&host->lock);
 499         return status;
 500 }
 501
 502 static int wrr_batch_add_value_list(struct riemann_host *host, /* {{{ */
 503                                     data_set_t const *ds,
 504                                     value_list_t const *vl,
 505                                     int *statuses)
 506 {
 507         riemann_message_t *msg;
 508         size_t len;
 509         int ret;
 510     cdtime_t timeout;
 511
 512         msg = wrr_value_list_to_message(host, ds, vl, statuses);
 513         if (msg == NULL)
 514                 return -1;
 515
 516         pthread_mutex_lock(&host->lock);
 517
 518         if (host->batch_msg == NULL) {
 519                 host->batch_msg = msg;
 520         } else {
 521                 int status;
 522
 523                 status = riemann_message_append_events_n(host->batch_msg,
 524                                                          msg->n_events,
 525                                                          msg->events);
 526                 msg->n_events = 0;
 527                 msg->events = NULL;
 528
 529                 riemann_message_free(msg);
 530
 531                 if (status != 0) {
 532                         pthread_mutex_unlock(&host->lock);
 533                         ERROR("write_riemann plugin: out of memory");
 534                         return -1;
 535                 }
 536         }
 537
 538         len = riemann_message_get_packed_size(host->batch_msg);
 539         ret = 0;
 540         if ((host->batch_max < 0) || (((size_t) host->batch_max) <= len)) {
 541                 ret = wrr_batch_flush_nolock(0, host);
 542         } else {
 543         if (host->batch_timeout > 0) {
 544             timeout = TIME_T_TO_CDTIME_T((time_t)host->batch_timeout);
 545             ret = wrr_batch_flush_nolock(timeout, host);
 546         }
 547     }
 548
 549         pthread_mutex_unlock(&host->lock);
 550         return ret;
 551 } /* }}} riemann_message_t *wrr_batch_add_value_list */
 552
 553 static int wrr_notification(const notification_t *n, user_data_t *ud) /* {{{ */
 554 {
 555         int                      status;
 556         struct riemann_host     *host = ud->data;
 557         riemann_message_t       *msg;
 558
 559         if (!host->notifications)
 560                 return 0;
 561
 562     /*
 563      * Never batch for notifications, send them ASAP
 564      */
 565         msg = wrr_notification_to_message(host, n);
 566         if (msg == NULL)
 567                 return (-1);
 568
 569         status = wrr_send(host, msg);
 570         if (status != 0)
 571         c_complain (LOG_ERR, &host->init_complaint,
 572                     "write_riemann plugin: riemann_client_send failed with status %i",
 573                     status);
 574     else
 575         c_release (LOG_DEBUG, &host->init_complaint,
 576                    "write_riemann plugin: riemann_client_send succeeded");
 577
 578         riemann_message_free(msg);
 579         return (status);
 580 } /* }}} int wrr_notification */
 581
 582 static int wrr_write(const data_set_t *ds, /* {{{ */
 583               const value_list_t *vl,
 584               user_data_t *ud)
 585 {
 586         int                      status = 0;
 587         int                      statuses[vl->values_len];
 588         struct riemann_host     *host = ud->data;
 589         riemann_message_t       *msg;
 590
 591         if (host->check_thresholds) {
 592                 status = write_riemann_threshold_check(ds, vl, statuses);
 593     if (status != 0)
 594       return status;
 595   } else {
 596     memset (statuses, 0, sizeof (statuses));
 597   }
 598
 599   if (host->client_type != RIEMANN_CLIENT_UDP && host->batch_mode) {
 600       wrr_batch_add_value_list(host, ds, vl, statuses);
 601   } else {
 602     msg = wrr_value_list_to_message(host, ds, vl, statuses);
 603     if (msg == NULL)
 604       return (-1);
 605
 606     status = wrr_send(host, msg);
 607
 608     riemann_message_free(msg);
 609   }
 610   return status;
 611 } /* }}} int wrr_write */
 612
 613 static void wrr_free(void *p) /* {{{ */
 614 {
 615   struct riemann_host   *host = p;
 616
 617   if (host == NULL)
 618     return;
 619
 620   pthread_mutex_lock(&host->lock);
 621
 622   host->reference_count--;
 623   if (host->reference_count > 0)
 624     {
 625       pthread_mutex_unlock(&host->lock);
 626       return;
 627     }
 628
 629   wrr_disconnect(host);
 630
 631   pthread_mutex_destroy(&host->lock);
 632   sfree(host);
 633 } /* }}} void wrr_free */
 634
 635 static int wrr_config_node(oconfig_item_t *ci) /* {{{ */
 636 {
 637   struct riemann_host   *host = NULL;
 638   int                    status = 0;
 639   int                    i;
 640   oconfig_item_t                *child;
 641   char                   callback_name[DATA_MAX_NAME_LEN];
 642   user_data_t            ud;
 643
 644   if ((host = calloc(1, sizeof(*host))) == NULL) {
 645     ERROR ("write_riemann plugin: calloc failed.");
 646     return ENOMEM;
 647   }
 648   pthread_mutex_init(&host->lock, NULL);
 649   C_COMPLAIN_INIT (&host->init_complaint);
 650   host->reference_count = 1;
 651   host->node = NULL;
 652   host->port = 0;
 653   host->notifications = 1;
 654   host->check_thresholds = 0;
 655   host->store_rates = 1;
 656   host->always_append_ds = 0;
 657   host->batch_mode = 1;
 658   host->batch_max = RIEMANN_BATCH_MAX; /* typical MSS */
 659   host->batch_init = cdtime();
 660   host->batch_timeout = 0;
 661   host->ttl_factor = RIEMANN_TTL_FACTOR;
 662   host->client = NULL;
 663   host->client_type = RIEMANN_CLIENT_TCP;
 664   host->timeout.tv_sec = 0;
 665   host->timeout.tv_usec = 0;
 666
 667   status = cf_util_get_string(ci, &host->name);
 668   if (status != 0) {
 669     WARNING("write_riemann plugin: Required host name is missing.");
 670     wrr_free(host);
 671     return -1;
 672   }
 673
 674   for (i = 0; i < ci->children_num; i++) {
 675     /*
 676      * The code here could be simplified but makes room
 677      * for easy adding of new options later on.
 678      */
 679     child = &ci->children[i];
 680     status = 0;
 681
 682     if (strcasecmp("Host", child->key) == 0) {
 683       status = cf_util_get_string(child, &host->node);
 684       if (status != 0)
 685         break;
 686     } else if (strcasecmp("Notifications", child->key) == 0) {
 687       status = cf_util_get_boolean(child, &host->notifications);
 688       if (status != 0)
 689         break;
 690     } else if (strcasecmp("EventServicePrefix", child->key) == 0) {
 691       status = cf_util_get_string(child, &host->event_service_prefix);
 692       if (status != 0)
 693         break;
 694     } else if (strcasecmp("CheckThresholds", child->key) == 0) {
 695       status = cf_util_get_boolean(child, &host->check_thresholds);
 696       if (status != 0)
 697         break;
 698     } else if (strcasecmp("Batch", child->key) == 0) {
 699       status = cf_util_get_boolean(child, &host->batch_mode);
 700       if (status != 0)
 701         break;
 702     } else if (strcasecmp("BatchMaxSize", child->key) == 0) {
 703       status = cf_util_get_int(child, &host->batch_max);
 704       if (status != 0)
 705         break;
 706     } else if (strcasecmp("BatchFlushTimeout", child->key) == 0) {
 707       status = cf_util_get_int(child, &host->batch_timeout);
 708       if (status != 0)
 709         break;
 710     } else if (strcasecmp("Timeout", child->key) == 0) {
 711       status = cf_util_get_int(child, (int *)&host->timeout.tv_sec);
 712       if (status != 0)
 713         break;
 714     } else if (strcasecmp("Port", child->key) == 0) {
 715       host->port = cf_util_get_port_number(child);
 716       if (host->port == -1) {
 717         ERROR("write_riemann plugin: Invalid argument "
 718               "configured for the \"Port\" "
 719               "option.");
 720         break;
 721       }
 722     } else if (strcasecmp("Protocol", child->key) == 0) {
 723       char tmp[16];
 724       status = cf_util_get_string_buffer(child,
 725                                          tmp, sizeof(tmp));
 726       if (status != 0)
 727         {
 728           ERROR("write_riemann plugin: cf_util_get_"
 729                 "string_buffer failed with "
 730                 "status %i.", status);
 731           break;
 732         }
 733
 734       if (strcasecmp("UDP", tmp) == 0)
 735         host->client_type = RIEMANN_CLIENT_UDP;
 736       else if (strcasecmp("TCP", tmp) == 0)
 737         host->client_type = RIEMANN_CLIENT_TCP;
 738       else if (strcasecmp("TLS", tmp) == 0)
 739         host->client_type = RIEMANN_CLIENT_TLS;
 740       else
 741         WARNING("write_riemann plugin: The value "
 742                 "\"%s\" is not valid for the "
 743                 "\"Protocol\" option. Use "
 744                 "either \"UDP\", \"TCP\" or \"TLS\".",
 745                 tmp);
 746     } else if (strcasecmp("TLSCAFile", child->key) == 0) {
 747       status = cf_util_get_string(child, &host->tls_ca_file);
 748       if (status != 0)
 749         {
 750           ERROR("write_riemann plugin: cf_util_get_"
 751                 "string_buffer failed with "
 752                 "status %i.", status);
 753           break;
 754         }
 755     } else if (strcasecmp("TLSCertFile", child->key) == 0) {
 756       status = cf_util_get_string(child, &host->tls_cert_file);
 757       if (status != 0)
 758         {
 759           ERROR("write_riemann plugin: cf_util_get_"
 760                 "string_buffer failed with "
 761                 "status %i.", status);
 762           break;
 763         }
 764     } else if (strcasecmp("TLSKeyFile", child->key) == 0) {
 765       status = cf_util_get_string(child, &host->tls_key_file);
 766       if (status != 0)
 767         {
 768           ERROR("write_riemann plugin: cf_util_get_"
 769                 "string_buffer failed with "
 770                 "status %i.", status);
 771           break;
 772         }
 773     } else if (strcasecmp("StoreRates", child->key) == 0) {
 774       status = cf_util_get_boolean(child, &host->store_rates);
 775       if (status != 0)
 776         break;
 777     } else if (strcasecmp("AlwaysAppendDS", child->key) == 0) {
 778       status = cf_util_get_boolean(child,
 779                                    &host->always_append_ds);
 780       if (status != 0)
 781         break;
 782     } else if (strcasecmp("TTLFactor", child->key) == 0) {
 783       double tmp = NAN;
 784       status = cf_util_get_double(child, &tmp);
 785       if (status != 0)
 786         break;
 787       if (tmp >= 2.0) {
 788         host->ttl_factor = tmp;
 789       } else if (tmp >= 1.0) {
 790         NOTICE("write_riemann plugin: The configured "
 791                "TTLFactor is very small "
 792                "(%.1f). A value of 2.0 or "
 793                "greater is recommended.",
 794                tmp);
 795         host->ttl_factor = tmp;
 796       } else if (tmp > 0.0) {
 797         WARNING("write_riemann plugin: The configured "
 798                 "TTLFactor is too small to be "
 799                 "useful (%.1f). I'll use it "
 800                 "since the user knows best, "
 801                 "but under protest.",
 802                 tmp);
 803         host->ttl_factor = tmp;
 804       } else { /* zero, negative and NAN */
 805         ERROR("write_riemann plugin: The configured "
 806               "TTLFactor is invalid (%.1f).",
 807               tmp);
 808       }
 809     } else {
 810       WARNING("write_riemann plugin: ignoring unknown config "
 811               "option: \"%s\"", child->key);
 812     }
 813   }
 814   if (status != 0) {
 815     wrr_free(host);
 816     return status;
 817   }
 818
 819   ssnprintf(callback_name, sizeof(callback_name), "write_riemann/%s",
 820             host->name);
 821   ud.data = host;
 822   ud.free_func = wrr_free;
 823
 824   pthread_mutex_lock(&host->lock);
 825
 826   status = plugin_register_write(callback_name, wrr_write, &ud);
 827
 828   if (host->client_type != RIEMANN_CLIENT_UDP && host->batch_mode) {
 829     ud.free_func = NULL;
 830     plugin_register_flush(callback_name, wrr_batch_flush, &ud);
 831   }
 832   if (status != 0)
 833     WARNING("write_riemann plugin: plugin_register_write (\"%s\") "
 834             "failed with status %i.",
 835             callback_name, status);
 836   else /* success */
 837     host->reference_count++;
 838
 839   status = plugin_register_notification(callback_name,
 840                                         wrr_notification, &ud);
 841   if (status != 0)
 842     WARNING("write_riemann plugin: plugin_register_notification (\"%s\") "
 843             "failed with status %i.",
 844             callback_name, status);
 845   else /* success */
 846     host->reference_count++;
 847
 848   if (host->reference_count <= 1)
 849     {
 850       /* Both callbacks failed => free memory.
 851        * We need to unlock here, because riemann_free() will lock.
 852        * This is not a race condition, because we're the only one
 853        * holding a reference. */
 854       pthread_mutex_unlock(&host->lock);
 855       wrr_free(host);
 856       return (-1);
 857     }
 858
 859   host->reference_count--;
 860   pthread_mutex_unlock(&host->lock);
 861
 862   return status;
 863 } /* }}} int wrr_config_node */
 864
 865 static int wrr_config(oconfig_item_t *ci) /* {{{ */
 866 {
 867   int            i;
 868   oconfig_item_t        *child;
 869   int            status;
 870
 871   for (i = 0; i < ci->children_num; i++)  {
 872     child = &ci->children[i];
 873
 874     if (strcasecmp("Node", child->key) == 0) {
 875       wrr_config_node (child);
 876     } else if (strcasecmp(child->key, "attribute") == 0) {
 877       char *key = NULL;
 878       char *val = NULL;
 879
 880       if (child->values_num != 2) {
 881         WARNING("riemann attributes need both a key and a value.");
 882         return (-1);
 883       }
 884       if (child->values[0].type != OCONFIG_TYPE_STRING ||
 885           child->values[1].type != OCONFIG_TYPE_STRING) {
 886         WARNING("riemann attribute needs string arguments.");
 887         return (-1);
 888       }
 889       if ((key = strdup(child->values[0].value.string)) == NULL) {
 890         WARNING("cannot allocate memory for attribute key.");
 891         return (-1);
 892       }
 893       if ((val = strdup(child->values[1].value.string)) == NULL) {
 894         WARNING("cannot allocate memory for attribute value.");
 895         sfree(key);
 896         return (-1);
 897       }
 898       strarray_add(&riemann_attrs, &riemann_attrs_num, key);
 899       strarray_add(&riemann_attrs, &riemann_attrs_num, val);
 900       DEBUG("write_riemann: got attr: %s => %s", key, val);
 901       sfree(key);
 902       sfree(val);
 903     } else if (strcasecmp(child->key, "tag") == 0) {
 904       char *tmp = NULL;
 905       status = cf_util_get_string(child, &tmp);
 906       if (status != 0)
 907         continue;
 908
 909       strarray_add(&riemann_tags, &riemann_tags_num, tmp);
 910       DEBUG("write_riemann plugin: Got tag: %s", tmp);
 911       sfree(tmp);
 912     } else {
 913       WARNING("write_riemann plugin: Ignoring unknown "
 914               "configuration option \"%s\" at top level.",
 915               child->key);
 916     }
 917   }
 918   return (0);
 919 } /* }}} int wrr_config */
 920
 921 void module_register(void)
 922 {
 923   plugin_register_complex_config("write_riemann", wrr_config);
 924 }
 925
 926 /* vim: set sw=8 sts=8 ts=8 noet : */