2 * collectd - src/threshold.c
3 * Copyright (C) 2007-2010 Florian Forster
4 * Copyright (C) 2008-2009 Sebastian Harl
5 * Copyright (C) 2009 Andrés J. Díaz
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Florian octo Forster <octo at collectd.org>
22 * Sebastian Harl <sh at tokkee.org>
23 * Andrés J. Díaz <ajdiaz at connectical.com>
29 #include "utils_avltree.h"
30 #include "utils_cache.h"
36 * Private data structures
38 #define UT_FLAG_INVERT 0x01
39 #define UT_FLAG_PERSIST 0x02
40 #define UT_FLAG_PERCENTAGE 0x04
41 #define UT_FLAG_INTERESTING 0x08
42 #define UT_FLAG_PERSIST_OK 0x10
43 typedef struct threshold_s
45 char host[DATA_MAX_NAME_LEN];
46 char plugin[DATA_MAX_NAME_LEN];
47 char plugin_instance[DATA_MAX_NAME_LEN];
48 char type[DATA_MAX_NAME_LEN];
49 char type_instance[DATA_MAX_NAME_LEN];
50 char data_source[DATA_MAX_NAME_LEN];
58 struct threshold_s *next;
63 * Private (static) variables
65 static c_avl_tree_t *threshold_tree = NULL;
66 static pthread_mutex_t threshold_lock = PTHREAD_MUTEX_INITIALIZER;
70 * Threshold management
71 * ====================
72 * The following functions add, delete, search, etc. configured thresholds to
73 * the underlying AVL trees.
76 * threshold_t *threshold_get
78 * Retrieve one specific threshold configuration. For looking up a threshold
79 * matching a value_list_t, see "threshold_search" below. Returns NULL if the
80 * specified threshold doesn't exist.
82 static threshold_t *threshold_get (const char *hostname,
83 const char *plugin, const char *plugin_instance,
84 const char *type, const char *type_instance)
86 char name[6 * DATA_MAX_NAME_LEN];
87 threshold_t *th = NULL;
89 format_name (name, sizeof (name),
90 (hostname == NULL) ? "" : hostname,
91 (plugin == NULL) ? "" : plugin, plugin_instance,
92 (type == NULL) ? "" : type, type_instance);
93 name[sizeof (name) - 1] = '\0';
95 if (c_avl_get (threshold_tree, name, (void *) &th) == 0)
99 } /* }}} threshold_t *threshold_get */
102 * int ut_threshold_add
104 * Adds a threshold configuration to the list of thresholds. The threshold_t
105 * structure is copied and may be destroyed after this call. Returns zero on
106 * success, non-zero otherwise.
108 static int ut_threshold_add (const threshold_t *th)
110 char name[6 * DATA_MAX_NAME_LEN];
112 threshold_t *th_copy;
116 if (format_name (name, sizeof (name), th->host,
117 th->plugin, th->plugin_instance,
118 th->type, th->type_instance) != 0)
120 ERROR ("ut_threshold_add: format_name failed.");
124 name_copy = strdup (name);
125 if (name_copy == NULL)
127 ERROR ("ut_threshold_add: strdup failed.");
131 th_copy = (threshold_t *) malloc (sizeof (threshold_t));
135 ERROR ("ut_threshold_add: malloc failed.");
138 memcpy (th_copy, th, sizeof (threshold_t));
141 DEBUG ("ut_threshold_add: Adding entry `%s'", name);
143 pthread_mutex_lock (&threshold_lock);
145 th_ptr = threshold_get (th->host, th->plugin, th->plugin_instance,
146 th->type, th->type_instance);
148 while ((th_ptr != NULL) && (th_ptr->next != NULL))
149 th_ptr = th_ptr->next;
151 if (th_ptr == NULL) /* no such threshold yet */
153 status = c_avl_insert (threshold_tree, name_copy, th_copy);
155 else /* th_ptr points to the last threshold in the list */
157 th_ptr->next = th_copy;
158 /* name_copy isn't needed */
162 pthread_mutex_unlock (&threshold_lock);
166 ERROR ("ut_threshold_add: c_avl_insert (%s) failed.", name);
172 } /* }}} int ut_threshold_add */
175 * threshold_t *threshold_search
177 * Searches for a threshold configuration using all the possible variations of
178 * "Host", "Plugin" and "Type" blocks. Returns NULL if no threshold could be
180 * XXX: This is likely the least efficient function in collectd.
182 static threshold_t *threshold_search (const value_list_t *vl)
186 if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
187 vl->type, vl->type_instance)) != NULL)
189 else if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
190 vl->type, NULL)) != NULL)
192 else if ((th = threshold_get (vl->host, vl->plugin, NULL,
193 vl->type, vl->type_instance)) != NULL)
195 else if ((th = threshold_get (vl->host, vl->plugin, NULL,
196 vl->type, NULL)) != NULL)
198 else if ((th = threshold_get (vl->host, "", NULL,
199 vl->type, vl->type_instance)) != NULL)
201 else if ((th = threshold_get (vl->host, "", NULL,
202 vl->type, NULL)) != NULL)
204 else if ((th = threshold_get ("", vl->plugin, vl->plugin_instance,
205 vl->type, vl->type_instance)) != NULL)
207 else if ((th = threshold_get ("", vl->plugin, vl->plugin_instance,
208 vl->type, NULL)) != NULL)
210 else if ((th = threshold_get ("", vl->plugin, NULL,
211 vl->type, vl->type_instance)) != NULL)
213 else if ((th = threshold_get ("", vl->plugin, NULL,
214 vl->type, NULL)) != NULL)
216 else if ((th = threshold_get ("", "", NULL,
217 vl->type, vl->type_instance)) != NULL)
219 else if ((th = threshold_get ("", "", NULL,
220 vl->type, NULL)) != NULL)
224 } /* }}} threshold_t *threshold_search */
229 * The following approximately two hundred functions are used to handle the
230 * configuration and fill the threshold list.
232 static int ut_config_type_datasource (threshold_t *th, oconfig_item_t *ci)
234 if ((ci->values_num != 1)
235 || (ci->values[0].type != OCONFIG_TYPE_STRING))
237 WARNING ("threshold values: The `DataSource' option needs exactly one "
242 sstrncpy (th->data_source, ci->values[0].value.string,
243 sizeof (th->data_source));
246 } /* int ut_config_type_datasource */
248 static int ut_config_type_instance (threshold_t *th, oconfig_item_t *ci)
250 if ((ci->values_num != 1)
251 || (ci->values[0].type != OCONFIG_TYPE_STRING))
253 WARNING ("threshold values: The `Instance' option needs exactly one "
258 sstrncpy (th->type_instance, ci->values[0].value.string,
259 sizeof (th->type_instance));
262 } /* int ut_config_type_instance */
264 static int ut_config_type_max (threshold_t *th, oconfig_item_t *ci)
266 if ((ci->values_num != 1)
267 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
269 WARNING ("threshold values: The `%s' option needs exactly one "
270 "number argument.", ci->key);
274 if (strcasecmp (ci->key, "WarningMax") == 0)
275 th->warning_max = ci->values[0].value.number;
277 th->failure_max = ci->values[0].value.number;
280 } /* int ut_config_type_max */
282 static int ut_config_type_min (threshold_t *th, oconfig_item_t *ci)
284 if ((ci->values_num != 1)
285 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
287 WARNING ("threshold values: The `%s' option needs exactly one "
288 "number argument.", ci->key);
292 if (strcasecmp (ci->key, "WarningMin") == 0)
293 th->warning_min = ci->values[0].value.number;
295 th->failure_min = ci->values[0].value.number;
298 } /* int ut_config_type_min */
300 static int ut_config_type_hits (threshold_t *th, oconfig_item_t *ci)
302 if ((ci->values_num != 1)
303 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
305 WARNING ("threshold values: The `%s' option needs exactly one "
306 "number argument.", ci->key);
310 th->hits = ci->values[0].value.number;
313 } /* int ut_config_type_hits */
315 static int ut_config_type_hysteresis (threshold_t *th, oconfig_item_t *ci)
317 if ((ci->values_num != 1)
318 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
320 WARNING ("threshold values: The `%s' option needs exactly one "
321 "number argument.", ci->key);
325 th->hysteresis = ci->values[0].value.number;
328 } /* int ut_config_type_hysteresis */
330 static int ut_config_type (const threshold_t *th_orig, oconfig_item_t *ci)
336 if ((ci->values_num != 1)
337 || (ci->values[0].type != OCONFIG_TYPE_STRING))
339 WARNING ("threshold values: The `Type' block needs exactly one string "
344 if (ci->children_num < 1)
346 WARNING ("threshold values: The `Type' block needs at least one option.");
350 memcpy (&th, th_orig, sizeof (th));
351 sstrncpy (th.type, ci->values[0].value.string, sizeof (th.type));
353 th.warning_min = NAN;
354 th.warning_max = NAN;
355 th.failure_min = NAN;
356 th.failure_max = NAN;
359 th.flags = UT_FLAG_INTERESTING; /* interesting by default */
361 for (i = 0; i < ci->children_num; i++)
363 oconfig_item_t *option = ci->children + i;
365 if (strcasecmp ("Instance", option->key) == 0)
366 status = ut_config_type_instance (&th, option);
367 else if (strcasecmp ("DataSource", option->key) == 0)
368 status = ut_config_type_datasource (&th, option);
369 else if ((strcasecmp ("WarningMax", option->key) == 0)
370 || (strcasecmp ("FailureMax", option->key) == 0))
371 status = ut_config_type_max (&th, option);
372 else if ((strcasecmp ("WarningMin", option->key) == 0)
373 || (strcasecmp ("FailureMin", option->key) == 0))
374 status = ut_config_type_min (&th, option);
375 else if (strcasecmp ("Interesting", option->key) == 0)
376 status = cf_util_get_flag (option, &th.flags, UT_FLAG_INTERESTING);
377 else if (strcasecmp ("Invert", option->key) == 0)
378 status = cf_util_get_flag (option, &th.flags, UT_FLAG_INVERT);
379 else if (strcasecmp ("Persist", option->key) == 0)
380 status = cf_util_get_flag (option, &th.flags, UT_FLAG_PERSIST);
381 else if (strcasecmp ("PersistOK", option->key) == 0)
382 status = cf_util_get_flag (option, &th.flags, UT_FLAG_PERSIST_OK);
383 else if (strcasecmp ("Percentage", option->key) == 0)
384 status = cf_util_get_flag (option, &th.flags, UT_FLAG_PERCENTAGE);
385 else if (strcasecmp ("Hits", option->key) == 0)
386 status = ut_config_type_hits (&th, option);
387 else if (strcasecmp ("Hysteresis", option->key) == 0)
388 status = ut_config_type_hysteresis (&th, option);
391 WARNING ("threshold values: Option `%s' not allowed inside a `Type' "
392 "block.", option->key);
402 status = ut_threshold_add (&th);
406 } /* int ut_config_type */
408 static int ut_config_plugin_instance (threshold_t *th, oconfig_item_t *ci)
410 if ((ci->values_num != 1)
411 || (ci->values[0].type != OCONFIG_TYPE_STRING))
413 WARNING ("threshold values: The `Instance' option needs exactly one "
418 sstrncpy (th->plugin_instance, ci->values[0].value.string,
419 sizeof (th->plugin_instance));
422 } /* int ut_config_plugin_instance */
424 static int ut_config_plugin (const threshold_t *th_orig, oconfig_item_t *ci)
430 if ((ci->values_num != 1)
431 || (ci->values[0].type != OCONFIG_TYPE_STRING))
433 WARNING ("threshold values: The `Plugin' block needs exactly one string "
438 if (ci->children_num < 1)
440 WARNING ("threshold values: The `Plugin' block needs at least one nested "
445 memcpy (&th, th_orig, sizeof (th));
446 sstrncpy (th.plugin, ci->values[0].value.string, sizeof (th.plugin));
448 for (i = 0; i < ci->children_num; i++)
450 oconfig_item_t *option = ci->children + i;
452 if (strcasecmp ("Type", option->key) == 0)
453 status = ut_config_type (&th, option);
454 else if (strcasecmp ("Instance", option->key) == 0)
455 status = ut_config_plugin_instance (&th, option);
458 WARNING ("threshold values: Option `%s' not allowed inside a `Plugin' "
459 "block.", option->key);
468 } /* int ut_config_plugin */
470 static int ut_config_host (const threshold_t *th_orig, oconfig_item_t *ci)
476 if ((ci->values_num != 1)
477 || (ci->values[0].type != OCONFIG_TYPE_STRING))
479 WARNING ("threshold values: The `Host' block needs exactly one string "
484 if (ci->children_num < 1)
486 WARNING ("threshold values: The `Host' block needs at least one nested "
491 memcpy (&th, th_orig, sizeof (th));
492 sstrncpy (th.host, ci->values[0].value.string, sizeof (th.host));
494 for (i = 0; i < ci->children_num; i++)
496 oconfig_item_t *option = ci->children + i;
498 if (strcasecmp ("Type", option->key) == 0)
499 status = ut_config_type (&th, option);
500 else if (strcasecmp ("Plugin", option->key) == 0)
501 status = ut_config_plugin (&th, option);
504 WARNING ("threshold values: Option `%s' not allowed inside a `Host' "
505 "block.", option->key);
514 } /* int ut_config_host */
516 * End of the functions used to configure threshold values.
521 * int ut_report_state
523 * Checks if the `state' differs from the old state and creates a notification
527 static int ut_report_state (const data_set_t *ds,
528 const value_list_t *vl,
529 const threshold_t *th,
530 const gauge_t *values,
542 /* Check if hits matched */
543 if ( (th->hits != 0) )
545 int hits = uc_get_hits(ds,vl);
546 /* STATE_OKAY resets hits unless PERSIST_OK flag is set. Hits resets if
547 * threshold is hit. */
548 if ( ( (state == STATE_OKAY) && ((th->flags & UT_FLAG_PERSIST_OK) == 0) ) || (hits > th->hits) )
550 DEBUG("ut_report_state: reset uc_get_hits = 0");
551 uc_set_hits(ds,vl,0); /* reset hit counter and notify */
553 DEBUG("ut_report_state: th->hits = %d, uc_get_hits = %d",th->hits,uc_get_hits(ds,vl));
554 (void) uc_inc_hits(ds,vl,1); /* increase hit counter */
557 } /* end check hits */
559 state_old = uc_get_state (ds, vl);
561 /* If the state didn't change, report if `persistent' is specified. If the
562 * state is `okay', then only report if `persist_ok` flag is set. */
563 if (state == state_old)
565 if ((th->flags & UT_FLAG_PERSIST) == 0)
567 else if ( (state == STATE_OKAY) && ((th->flags & UT_FLAG_PERSIST_OK) == 0) )
571 if (state != state_old)
572 uc_set_state (ds, vl, state);
574 NOTIFICATION_INIT_VL (&n, vl);
577 bufsize = sizeof (n.message);
579 if (state == STATE_OKAY)
580 n.severity = NOTIF_OKAY;
581 else if (state == STATE_WARNING)
582 n.severity = NOTIF_WARNING;
584 n.severity = NOTIF_FAILURE;
588 status = ssnprintf (buf, bufsize, "Host %s, plugin %s",
589 vl->host, vl->plugin);
593 if (vl->plugin_instance[0] != '\0')
595 status = ssnprintf (buf, bufsize, " (instance %s)",
596 vl->plugin_instance);
601 status = ssnprintf (buf, bufsize, " type %s", vl->type);
605 if (vl->type_instance[0] != '\0')
607 status = ssnprintf (buf, bufsize, " (instance %s)",
613 plugin_notification_meta_add_string (&n, "DataSource",
614 ds->ds[ds_index].name);
615 plugin_notification_meta_add_double (&n, "CurrentValue", values[ds_index]);
616 plugin_notification_meta_add_double (&n, "WarningMin", th->warning_min);
617 plugin_notification_meta_add_double (&n, "WarningMax", th->warning_max);
618 plugin_notification_meta_add_double (&n, "FailureMin", th->failure_min);
619 plugin_notification_meta_add_double (&n, "FailureMax", th->failure_max);
621 /* Send an okay notification */
622 if (state == STATE_OKAY)
624 if (state_old == STATE_MISSING)
625 ssnprintf (buf, bufsize, ": Value is no longer missing.");
627 ssnprintf (buf, bufsize, ": All data sources are within range again.");
634 min = (state == STATE_ERROR) ? th->failure_min : th->warning_min;
635 max = (state == STATE_ERROR) ? th->failure_max : th->warning_max;
637 if (th->flags & UT_FLAG_INVERT)
639 if (!isnan (min) && !isnan (max))
641 ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
642 "%f. That is within the %s region of %f%s and %f%s.",
643 ds->ds[ds_index].name, values[ds_index],
644 (state == STATE_ERROR) ? "failure" : "warning",
645 min, ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "",
646 max, ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
650 ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
651 "%f. That is %s the %s threshold of %f%s.",
652 ds->ds[ds_index].name, values[ds_index],
653 isnan (min) ? "below" : "above",
654 (state == STATE_ERROR) ? "failure" : "warning",
655 isnan (min) ? max : min,
656 ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
659 else if (th->flags & UT_FLAG_PERCENTAGE)
666 for (i = 0; i < vl->values_len; i++)
668 if (isnan (values[i]))
677 value = 100.0 * values[ds_index] / sum;
679 ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
680 "%g (%.2f%%). That is %s the %s threshold of %.2f%%.",
681 ds->ds[ds_index].name, values[ds_index], value,
682 (value < min) ? "below" : "above",
683 (state == STATE_ERROR) ? "failure" : "warning",
684 (value < min) ? min : max);
686 else /* is not inverted */
688 ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
689 "%f. That is %s the %s threshold of %f.",
690 ds->ds[ds_index].name, values[ds_index],
691 (values[ds_index] < min) ? "below" : "above",
692 (state == STATE_ERROR) ? "failure" : "warning",
693 (values[ds_index] < min) ? min : max);
697 plugin_dispatch_notification (&n);
699 plugin_notification_meta_free (n.meta);
701 } /* }}} int ut_report_state */
704 * int ut_check_one_data_source
706 * Checks one data source against the given threshold configuration. If the
707 * `DataSource' option is set in the threshold, and the name does NOT match,
708 * `okay' is returned. If the threshold does match, its failure and warning
709 * min and max values are checked and `failure' or `warning' is returned if
713 static int ut_check_one_data_source (const data_set_t *ds,
714 const value_list_t __attribute__((unused)) *vl,
715 const threshold_t *th,
716 const gauge_t *values,
722 int prev_state = STATE_OKAY;
724 /* check if this threshold applies to this data source */
727 ds_name = ds->ds[ds_index].name;
728 if ((th->data_source[0] != 0)
729 && (strcmp (ds_name, th->data_source) != 0))
733 if ((th->flags & UT_FLAG_INVERT) != 0)
739 /* XXX: This is an experimental code, not optimized, not fast, not reliable,
740 * and probably, do not work as you expect. Enjoy! :D */
741 if ( (th->hysteresis > 0) && ((prev_state = uc_get_state(ds,vl)) != STATE_OKAY) )
746 if ( (!isnan (th->failure_min) && ((th->failure_min + th->hysteresis) < values[ds_index])) ||
747 (!isnan (th->failure_max) && ((th->failure_max - th->hysteresis) > values[ds_index])) )
752 if ( (!isnan (th->warning_min) && ((th->warning_min + th->hysteresis) < values[ds_index])) ||
753 (!isnan (th->warning_max) && ((th->warning_max - th->hysteresis) > values[ds_index])) )
759 else { /* no hysteresis */
760 if ((!isnan (th->failure_min) && (th->failure_min > values[ds_index]))
761 || (!isnan (th->failure_max) && (th->failure_max < values[ds_index])))
764 if ((!isnan (th->warning_min) && (th->warning_min > values[ds_index]))
765 || (!isnan (th->warning_max) && (th->warning_max < values[ds_index])))
770 return (STATE_ERROR);
773 return (STATE_WARNING);
776 } /* }}} int ut_check_one_data_source */
779 * int ut_check_one_threshold
781 * Checks all data sources of a value list against the given threshold, using
782 * the ut_check_one_data_source function above. Returns the worst status,
783 * which is `okay' if nothing has failed.
784 * Returns less than zero if the data set doesn't have any data sources.
786 static int ut_check_one_threshold (const data_set_t *ds,
787 const value_list_t *vl,
788 const threshold_t *th,
789 const gauge_t *values,
795 gauge_t values_copy[ds->ds_num];
797 memcpy (values_copy, values, sizeof (values_copy));
799 if ((th->flags & UT_FLAG_PERCENTAGE) != 0)
806 WARNING ("ut_check_one_threshold: The %s type has only one data "
807 "source, but you have configured to check this as a percentage. "
808 "That doesn't make much sense, because the percentage will always "
809 "be 100%%!", ds->type);
812 /* Prepare `sum' and `num'. */
813 for (i = 0; i < ds->ds_num; i++)
814 if (!isnan (values[i]))
820 if ((num == 0) /* All data sources are undefined. */
821 || (sum == 0.0)) /* Sum is zero, cannot calculate percentage. */
823 for (i = 0; i < ds->ds_num; i++)
824 values_copy[i] = NAN;
826 else /* We can actually calculate the percentage. */
828 for (i = 0; i < ds->ds_num; i++)
829 values_copy[i] = 100.0 * values[i] / sum;
831 } /* if (UT_FLAG_PERCENTAGE) */
833 for (i = 0; i < ds->ds_num; i++)
837 status = ut_check_one_data_source (ds, vl, th, values_copy, i);
843 } /* for (ds->ds_num) */
845 if (ret_ds_index != NULL)
846 *ret_ds_index = ds_index;
849 } /* }}} int ut_check_one_threshold */
852 * int ut_check_threshold
854 * Gets a list of matching thresholds and searches for the worst status by one
855 * of the thresholds. Then reports that status using the ut_report_state
857 * Returns zero on success and if no threshold has been configured. Returns
858 * less than zero on failure.
860 static int ut_check_threshold (const data_set_t *ds, const value_list_t *vl,
861 __attribute__((unused)) user_data_t *ud)
867 int worst_state = -1;
868 threshold_t *worst_th = NULL;
869 int worst_ds_index = -1;
871 if (threshold_tree == NULL)
874 /* Is this lock really necessary? So far, thresholds are only inserted at
876 pthread_mutex_lock (&threshold_lock);
877 th = threshold_search (vl);
878 pthread_mutex_unlock (&threshold_lock);
882 DEBUG ("ut_check_threshold: Found matching threshold(s)");
884 values = uc_get_rate (ds, vl);
892 status = ut_check_one_threshold (ds, vl, th, values, &ds_index);
895 ERROR ("ut_check_threshold: ut_check_one_threshold failed.");
900 if (worst_state < status)
902 worst_state = status;
904 worst_ds_index = ds_index;
910 status = ut_report_state (ds, vl, worst_th, values,
911 worst_ds_index, worst_state);
914 ERROR ("ut_check_threshold: ut_report_state failed.");
922 } /* }}} int ut_check_threshold */
927 * This function is called whenever a value goes "missing".
929 static int ut_missing (const value_list_t *vl,
930 __attribute__((unused)) user_data_t *ud)
933 cdtime_t missing_time;
934 char identifier[6 * DATA_MAX_NAME_LEN];
938 if (threshold_tree == NULL)
941 th = threshold_search (vl);
942 /* dispatch notifications for "interesting" values only */
943 if ((th == NULL) || ((th->flags & UT_FLAG_INTERESTING) == 0))
947 missing_time = now - vl->time;
948 FORMAT_VL (identifier, sizeof (identifier), vl);
950 NOTIFICATION_INIT_VL (&n, vl);
951 ssnprintf (n.message, sizeof (n.message),
952 "%s has not been updated for %.3f seconds.",
953 identifier, CDTIME_T_TO_DOUBLE (missing_time));
956 plugin_dispatch_notification (&n);
959 } /* }}} int ut_missing */
961 int ut_config (oconfig_item_t *ci)
968 if (threshold_tree == NULL)
970 threshold_tree = c_avl_create ((void *) strcmp);
971 if (threshold_tree == NULL)
973 ERROR ("ut_config: c_avl_create failed.");
978 memset (&th, '\0', sizeof (th));
979 th.warning_min = NAN;
980 th.warning_max = NAN;
981 th.failure_min = NAN;
982 th.failure_max = NAN;
986 th.flags = UT_FLAG_INTERESTING; /* interesting by default */
988 for (i = 0; i < ci->children_num; i++)
990 oconfig_item_t *option = ci->children + i;
992 if (strcasecmp ("Type", option->key) == 0)
993 status = ut_config_type (&th, option);
994 else if (strcasecmp ("Plugin", option->key) == 0)
995 status = ut_config_plugin (&th, option);
996 else if (strcasecmp ("Host", option->key) == 0)
997 status = ut_config_host (&th, option);
1000 WARNING ("threshold values: Option `%s' not allowed here.", option->key);
1008 if (c_avl_size (threshold_tree) > 0) {
1009 plugin_register_missing ("threshold", ut_missing,
1010 /* user data = */ NULL);
1011 plugin_register_write ("threshold", ut_check_threshold,
1012 /* user data = */ NULL);
1016 } /* }}} int um_config */
1018 void module_register (void)
1020 plugin_register_complex_config ("threshold", ut_config);
1023 /* vim: set sw=2 ts=8 sts=2 tw=78 et fdm=marker : */