2 * collectd-nagios - src/collectd-nagios.c
3 * Copyright (C) 2008 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
22 /* Set to C99 and POSIX code */
23 #ifndef _ISOC99_SOURCE
24 # define _ISOC99_SOURCE
27 # define _POSIX_SOURCE
29 #ifndef _POSIX_C_SOURCE
30 # define _POSIX_C_SOURCE 200112L
36 /* Disable non-standard extensions */
47 #if !defined(__GNUC__) || !__GNUC__
48 # define __attribute__(x) /**/
61 #include <sys/socket.h>
64 #include "libcollectdclient/client.h"
67 * This is copied directly from collectd.h. Make changes there!
69 #if NAN_STATIC_DEFAULT
71 /* #endif NAN_STATIC_DEFAULT*/
74 # define DISABLE_ISOC99 1
75 # define __USE_ISOC99 1
76 # endif /* !defined(__USE_ISOC99) */
79 # undef DISABLE_ISOC99
81 # endif /* DISABLE_ISOC99 */
82 /* #endif NAN_STATIC_ISOC */
88 # define NAN (0.0 / 0.0)
90 # define isnan(f) ((f) != (f))
91 # endif /* !defined(isnan) */
92 #endif /* NAN_ZERO_ZERO */
96 #define RET_CRITICAL 2
100 #define CON_AVERAGE 1
102 #define CON_PERCENTAGE 3
110 typedef struct range_s range_t;
113 extern int optind, opterr, optopt;
115 static char *socket_file_g = NULL;
116 static char *value_string_g = NULL;
117 static char *hostname_g = NULL;
119 static range_t range_critical_g;
120 static range_t range_warning_g;
121 static int consolitation_g = CON_NONE;
123 static char **match_ds_g = NULL;
124 static int match_ds_num_g = 0;
126 /* `strdup' is an XSI extension. I don't want to pull in all of XSI just for
127 * that, so here's an own implementation.. It's easy enough. The GCC attributes
128 * are supposed to get good performance.. -octo */
129 __attribute__((malloc, nonnull (1)))
130 static char *cn_strdup (const char *str) /* {{{ */
135 strsize = strlen (str) + 1;
136 ret = (char *) malloc (strsize);
138 memcpy (ret, str, strsize);
140 } /* }}} char *cn_strdup */
142 static int filter_ds (size_t *values_num,
143 double **values, char ***values_names)
150 if (match_ds_g == NULL)
153 new_values = (gauge_t *)calloc (match_ds_num_g, sizeof (*new_values));
154 if (new_values == NULL)
156 fprintf (stderr, "malloc failed: %s\n", strerror (errno));
157 return (RET_UNKNOWN);
160 new_names = (char **)calloc (match_ds_num_g, sizeof (*new_names));
161 if (new_names == NULL)
163 fprintf (stderr, "malloc failed: %s\n", strerror (errno));
165 return (RET_UNKNOWN);
168 for (i = 0; i < (size_t) match_ds_num_g; i++)
172 /* match_ds_g keeps pointers into argv but the names will be freed */
173 new_names[i] = cn_strdup (match_ds_g[i]);
174 if (new_names[i] == NULL)
176 fprintf (stderr, "cn_strdup failed: %s\n", strerror (errno));
178 for (j = 0; j < i; j++)
181 return (RET_UNKNOWN);
184 for (j = 0; j < *values_num; j++)
185 if (strcasecmp (new_names[i], (*values_names)[j]) == 0)
188 if (j == *values_num)
190 printf ("ERROR: DS `%s' is not available.\n", new_names[i]);
192 for (j = 0; j <= i; j++)
195 return (RET_CRITICAL);
198 new_values[i] = (*values)[j];
202 for (i = 0; i < *values_num; i++)
203 free ((*values_names)[i]);
204 free (*values_names);
206 *values = new_values;
207 *values_names = new_names;
208 *values_num = match_ds_num_g;
210 } /* int filter_ds */
212 static void parse_range (char *string, range_t *range)
223 max_ptr = strchr (string, ':');
236 assert (max_ptr != NULL);
241 /* :10 == ~:10 == -inf:10 */
242 else if ((*min_ptr == '\0') || (*min_ptr == '~'))
245 range->min = atof (min_ptr);
247 if ((*max_ptr == '\0') || (*max_ptr == '~'))
250 range->max = atof (max_ptr);
251 } /* void parse_range */
253 static int match_range (range_t *range, double value)
257 if (!isnan (range->min) && (range->min > value))
259 if (!isnan (range->max) && (range->max < value))
262 return (((ret - range->invert) == 0) ? 0 : 1);
263 } /* int match_range */
265 static void usage (const char *name)
267 fprintf (stderr, "Usage: %s <-s socket> <-n value_spec> <-H hostname> [options]\n"
269 "Valid options are:\n"
270 " -s <socket> Path to collectd's UNIX-socket.\n"
271 " -n <v_spec> Value specification to get from collectd.\n"
272 " Format: `plugin-instance/type-instance'\n"
273 " -d <ds> Select the DS to examine. May be repeated to examine multiple\n"
274 " DSes. By default all DSes are used.\n"
275 " -g <consol> Method to use to consolidate several DSes.\n"
276 " See below for a list of valid arguments.\n"
277 " -H <host> Hostname to query the values for.\n"
278 " -c <range> Critical range\n"
279 " -w <range> Warning range\n"
281 "Consolidation functions:\n"
282 " none: Apply the warning- and critical-ranges to each data-source\n"
284 " average: Calculate the average of all matching DSes and apply the\n"
285 " warning- and critical-ranges to the calculated average.\n"
286 " sum: Apply the ranges to the sum of all DSes.\n"
287 " percentage: Apply the ranges to the ratio (in percent) of the first value\n"
288 " and the sum of all values."
293 static int do_check_con_none (size_t values_num,
294 double *values, char **values_names)
296 int num_critical = 0;
299 const char *status_str = "UNKNOWN";
300 int status_code = RET_UNKNOWN;
303 for (i = 0; i < values_num; i++)
305 if (isnan (values[i]))
307 else if (match_range (&range_critical_g, values[i]) != 0)
309 else if (match_range (&range_warning_g, values[i]) != 0)
315 if ((num_critical == 0) && (num_warning == 0) && (num_okay == 0))
317 printf ("WARNING: No defined values found\n");
318 return (RET_WARNING);
320 else if ((num_critical == 0) && (num_warning == 0))
323 status_code = RET_OKAY;
325 else if (num_critical == 0)
327 status_str = "WARNING";
328 status_code = RET_WARNING;
332 status_str = "CRITICAL";
333 status_code = RET_CRITICAL;
336 printf ("%s: %i critical, %i warning, %i okay", status_str,
337 num_critical, num_warning, num_okay);
341 for (i = 0; i < values_num; i++)
342 printf (" %s=%g;;;;", values_names[i], values[i]);
346 return (status_code);
347 } /* int do_check_con_none */
349 static int do_check_con_average (size_t values_num,
350 double *values, char **values_names)
356 const char *status_str = "UNKNOWN";
357 int status_code = RET_UNKNOWN;
361 for (i = 0; i < values_num; i++)
363 if (!isnan (values[i]))
372 printf ("WARNING: No defined values found\n");
373 return (RET_WARNING);
376 average = total / total_num;
378 if (match_range (&range_critical_g, average) != 0)
380 status_str = "CRITICAL";
381 status_code = RET_CRITICAL;
383 else if (match_range (&range_warning_g, average) != 0)
385 status_str = "WARNING";
386 status_code = RET_WARNING;
391 status_code = RET_OKAY;
394 printf ("%s: %g average |", status_str, average);
395 for (i = 0; i < values_num; i++)
396 printf (" %s=%g;;;;", values_names[i], values[i]);
399 return (status_code);
400 } /* int do_check_con_average */
402 static int do_check_con_sum (size_t values_num,
403 double *values, char **values_names)
408 const char *status_str = "UNKNOWN";
409 int status_code = RET_UNKNOWN;
413 for (i = 0; i < values_num; i++)
415 if (!isnan (values[i]))
424 printf ("WARNING: No defined values found\n");
425 return (RET_WARNING);
428 if (match_range (&range_critical_g, total) != 0)
430 status_str = "CRITICAL";
431 status_code = RET_CRITICAL;
433 else if (match_range (&range_warning_g, total) != 0)
435 status_str = "WARNING";
436 status_code = RET_WARNING;
441 status_code = RET_OKAY;
444 printf ("%s: %g sum |", status_str, total);
445 for (i = 0; i < values_num; i++)
446 printf (" %s=%g;;;;", values_names[i], values[i]);
449 return (status_code);
450 } /* int do_check_con_sum */
452 static int do_check_con_percentage (size_t values_num,
453 double *values, char **values_names)
459 const char *status_str = "UNKNOWN";
460 int status_code = RET_UNKNOWN;
462 if ((values_num < 1) || (isnan (values[0])))
464 printf ("WARNING: The first value is not defined\n");
465 return (RET_WARNING);
468 for (i = 0; i < values_num; i++)
469 if (!isnan (values[i]))
474 printf ("WARNING: Values sum up to zero\n");
475 return (RET_WARNING);
478 percentage = 100.0 * values[0] / sum;
480 if (match_range (&range_critical_g, percentage) != 0)
482 status_str = "CRITICAL";
483 status_code = RET_CRITICAL;
485 else if (match_range (&range_warning_g, percentage) != 0)
487 status_str = "WARNING";
488 status_code = RET_WARNING;
493 status_code = RET_OKAY;
496 printf ("%s: %lf percent |", status_str, percentage);
497 for (i = 0; i < values_num; i++)
498 printf (" %s=%lf;;;;", values_names[i], values[i]);
499 return (status_code);
500 } /* int do_check_con_percentage */
502 static int do_check (void)
504 lcc_connection_t *connection;
509 char ident_str[1024];
510 lcc_identifier_t ident;
514 snprintf (address, sizeof (address), "unix:%s", socket_file_g);
515 address[sizeof (address) - 1] = 0;
517 snprintf (ident_str, sizeof (ident_str), "%s/%s",
518 hostname_g, value_string_g);
519 ident_str[sizeof (ident_str) - 1] = 0;
522 status = lcc_connect (address, &connection);
525 printf ("ERROR: Connecting to daemon at %s failed.\n",
527 return (RET_CRITICAL);
530 memset (&ident, 0, sizeof (ident));
531 status = lcc_string_to_identifier (connection, &ident, ident_str);
534 printf ("ERROR: Creating an identifier failed: %s.\n",
535 lcc_strerror (connection));
536 LCC_DESTROY (connection);
537 return (RET_CRITICAL);
540 status = lcc_getval (connection, &ident,
541 &values_num, &values, &values_names);
544 printf ("ERROR: Retrieving values from the daemon failed: %s.\n",
545 lcc_strerror (connection));
546 LCC_DESTROY (connection);
547 return (RET_CRITICAL);
550 LCC_DESTROY (connection);
552 status = filter_ds (&values_num, &values, &values_names);
553 if (status != RET_OKAY)
556 status = RET_UNKNOWN;
557 if (consolitation_g == CON_NONE)
558 status = do_check_con_none (values_num, values, values_names);
559 else if (consolitation_g == CON_AVERAGE)
560 status = do_check_con_average (values_num, values, values_names);
561 else if (consolitation_g == CON_SUM)
562 status = do_check_con_sum (values_num, values, values_names);
563 else if (consolitation_g == CON_PERCENTAGE)
564 status = do_check_con_percentage (values_num, values, values_names);
567 if (values_names != NULL)
568 for (i = 0; i < values_num; i++)
569 free (values_names[i]);
575 int main (int argc, char **argv)
577 range_critical_g.min = NAN;
578 range_critical_g.max = NAN;
579 range_critical_g.invert = 0;
581 range_warning_g.min = NAN;
582 range_warning_g.max = NAN;
583 range_warning_g.invert = 0;
589 c = getopt (argc, argv, "w:c:s:n:H:g:d:h");
596 parse_range (optarg, &range_critical_g);
599 parse_range (optarg, &range_warning_g);
602 socket_file_g = optarg;
605 value_string_g = optarg;
611 if (strcasecmp (optarg, "none") == 0)
612 consolitation_g = CON_NONE;
613 else if (strcasecmp (optarg, "average") == 0)
614 consolitation_g = CON_AVERAGE;
615 else if (strcasecmp (optarg, "sum") == 0)
616 consolitation_g = CON_SUM;
617 else if (strcasecmp (optarg, "percentage") == 0)
618 consolitation_g = CON_PERCENTAGE;
621 fprintf (stderr, "Unknown consolidation function `%s'.\n",
629 tmp = (char **) realloc (match_ds_g,
634 fprintf (stderr, "realloc failed: %s\n",
636 return (RET_UNKNOWN);
639 match_ds_g[match_ds_num_g] = cn_strdup (optarg);
640 if (match_ds_g[match_ds_num_g] == NULL)
642 fprintf (stderr, "cn_strdup failed: %s\n",
644 return (RET_UNKNOWN);
654 if ((socket_file_g == NULL) || (value_string_g == NULL)
655 || (hostname_g == NULL))
657 fprintf (stderr, "Missing required arguments.\n");
661 return (do_check ());