a3dff3e96e0676a041dae8b953c945720a257bd1
1 /**
2 * collectd - src/rrdcached.c
3 * Copyright (C) 2008-2012 Florian octo Forster
4 *
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.
8 *
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.
13 *
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
17 *
18 * Authors:
19 * Florian octo Forster <octo at collectd.org>
20 **/
22 #include "collectd.h"
23 #include "plugin.h"
24 #include "common.h"
25 #include "utils_rrdcreate.h"
27 #undef HAVE_CONFIG_H
28 #include <rrd.h>
29 #include <rrd_client.h>
31 /*
32 * Private variables
33 */
34 static char *datadir = NULL;
35 static char *daemon_address = NULL;
36 static _Bool config_create_files = 1;
37 static _Bool config_collect_stats = 1;
38 static rrdcreate_config_t rrdcreate_config =
39 {
40 /* stepsize = */ 0,
41 /* heartbeat = */ 0,
42 /* rrarows = */ 1200,
43 /* xff = */ 0.1,
45 /* timespans = */ NULL,
46 /* timespans_num = */ 0,
48 /* consolidation_functions = */ NULL,
49 /* consolidation_functions_num = */ 0
50 };
52 /*
53 * Prototypes.
54 */
55 static int rc_write (const data_set_t *ds, const value_list_t *vl,
56 user_data_t __attribute__((unused)) *user_data);
57 static int rc_flush (__attribute__((unused)) cdtime_t timeout,
58 const char *identifier, __attribute__((unused)) user_data_t *ud);
60 static int value_list_to_string (char *buffer, int buffer_len,
61 const data_set_t *ds, const value_list_t *vl)
62 {
63 int offset;
64 int status;
65 int i;
66 time_t t;
68 assert (0 == strcmp (ds->type, vl->type));
70 memset (buffer, '\0', buffer_len);
72 t = CDTIME_T_TO_TIME_T (vl->time);
73 status = ssnprintf (buffer, buffer_len, "%lu", (unsigned long) t);
74 if ((status < 1) || (status >= buffer_len))
75 return (-1);
76 offset = status;
78 for (i = 0; i < ds->ds_num; i++)
79 {
80 if ((ds->ds[i].type != DS_TYPE_COUNTER)
81 && (ds->ds[i].type != DS_TYPE_GAUGE)
82 && (ds->ds[i].type != DS_TYPE_DERIVE)
83 && (ds->ds[i].type != DS_TYPE_ABSOLUTE))
84 return (-1);
86 if (ds->ds[i].type == DS_TYPE_COUNTER)
87 {
88 status = ssnprintf (buffer + offset, buffer_len - offset,
89 ":%llu", vl->values[i].counter);
90 }
91 else if (ds->ds[i].type == DS_TYPE_GAUGE)
92 {
93 status = ssnprintf (buffer + offset, buffer_len - offset,
94 ":%f", vl->values[i].gauge);
95 }
96 else if (ds->ds[i].type == DS_TYPE_DERIVE) {
97 status = ssnprintf (buffer + offset, buffer_len - offset,
98 ":%"PRIi64, vl->values[i].derive);
99 }
100 else /* if (ds->ds[i].type == DS_TYPE_ABSOLUTE) */ {
101 status = ssnprintf (buffer + offset, buffer_len - offset,
102 ":%"PRIu64, vl->values[i].absolute);
104 }
106 if ((status < 1) || (status >= (buffer_len - offset)))
107 return (-1);
109 offset += status;
110 } /* for ds->ds_num */
112 return (0);
113 } /* int value_list_to_string */
115 static int value_list_to_filename (char *buffer, int buffer_len,
116 const data_set_t *ds, const value_list_t *vl)
117 {
118 int offset = 0;
119 int status;
121 assert (0 == strcmp (ds->type, vl->type));
123 if (datadir != NULL)
124 {
125 status = ssnprintf (buffer + offset, buffer_len - offset,
126 "%s/", datadir);
127 if ((status < 1) || (status >= buffer_len - offset))
128 return (-1);
129 offset += status;
130 }
132 status = ssnprintf (buffer + offset, buffer_len - offset,
133 "%s/", vl->host);
134 if ((status < 1) || (status >= buffer_len - offset))
135 return (-1);
136 offset += status;
138 if (strlen (vl->plugin_instance) > 0)
139 status = ssnprintf (buffer + offset, buffer_len - offset,
140 "%s-%s/", vl->plugin, vl->plugin_instance);
141 else
142 status = ssnprintf (buffer + offset, buffer_len - offset,
143 "%s/", vl->plugin);
144 if ((status < 1) || (status >= buffer_len - offset))
145 return (-1);
146 offset += status;
148 if (strlen (vl->type_instance) > 0)
149 status = ssnprintf (buffer + offset, buffer_len - offset,
150 "%s-%s", vl->type, vl->type_instance);
151 else
152 status = ssnprintf (buffer + offset, buffer_len - offset,
153 "%s", vl->type);
154 if ((status < 1) || (status >= buffer_len - offset))
155 return (-1);
156 offset += status;
158 strncpy (buffer + offset, ".rrd", buffer_len - offset);
159 buffer[buffer_len - 1] = 0;
161 return (0);
162 } /* int value_list_to_filename */
164 static int rc_config_get_int_positive (oconfig_item_t const *ci, int *ret)
165 {
166 int status;
167 int tmp = 0;
169 status = cf_util_get_int (ci, &tmp);
170 if (status != 0)
171 return (status);
172 if (tmp < 0)
173 return (EINVAL);
175 *ret = tmp;
176 return (0);
177 } /* int rc_config_get_int_positive */
179 static int rc_config (oconfig_item_t *ci)
180 {
181 int i;
183 for (i = 0; i < ci->children_num; i++)
184 {
185 oconfig_item_t const *child = ci->children + i;
186 const char *key = child->key;
187 int status = 0;
189 if (strcasecmp ("DataDir", key) == 0)
190 {
191 status = cf_util_get_string (child, &datadir);
192 if (status == 0)
193 {
194 int len = strlen (datadir);
196 while ((len > 0) && (datadir[len - 1] == '/'))
197 {
198 len--;
199 datadir[len] = 0;
200 }
202 if (len <= 0)
203 sfree (datadir);
204 }
205 }
206 else if (strcasecmp ("DaemonAddress", key) == 0)
207 status = cf_util_get_string (child, &daemon_address);
208 else if (strcasecmp ("CreateFiles", key) == 0)
209 status = cf_util_get_boolean (child, &config_create_files);
210 else if (strcasecmp ("CollectStatistics", key) == 0)
211 status = cf_util_get_boolean (child, &config_collect_stats);
212 else if (strcasecmp ("StepSize", key) == 0)
213 status = rc_config_get_int_positive (child, &rrdcreate_config.stepsize);
214 else if (strcasecmp ("HeartBeat", key) == 0)
215 status = rc_config_get_int_positive (child, &rrdcreate_config.heartbeat);
216 else if (strcasecmp ("RRARows", key) == 0)
217 status = rc_config_get_int_positive (child, &rrdcreate_config.rrarows);
218 else
219 {
220 WARNING ("rrdcached plugin: Ignoring invalid option %s.", key);
221 continue;
222 }
224 if (status != 0)
225 WARNING ("rrdcached plugin: Handling the \"%s\" option failed.", key);
226 }
228 if (daemon_address != NULL)
229 {
230 plugin_register_write ("rrdcached", rc_write, /* user_data = */ NULL);
231 plugin_register_flush ("rrdcached", rc_flush, /* user_data = */ NULL);
232 }
233 return (0);
234 } /* int rc_config */
236 static int rc_read (void)
237 {
238 int status;
239 rrdc_stats_t *head;
240 rrdc_stats_t *ptr;
242 value_t values[1];
243 value_list_t vl = VALUE_LIST_INIT;
245 if (daemon_address == NULL)
246 return (-1);
248 if (!config_collect_stats)
249 return (-1);
251 vl.values = values;
252 vl.values_len = 1;
254 if ((strncmp ("unix:", daemon_address, strlen ("unix:")) == 0)
255 || (daemon_address[0] == '/'))
256 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
257 else
258 sstrncpy (vl.host, daemon_address, sizeof (vl.host));
259 sstrncpy (vl.plugin, "rrdcached", sizeof (vl.plugin));
261 head = NULL;
262 status = rrdc_stats_get (&head);
263 if (status != 0)
264 {
265 ERROR ("rrdcached plugin: rrdc_stats_get failed with status %i.", status);
266 return (-1);
267 }
269 for (ptr = head; ptr != NULL; ptr = ptr->next)
270 {
271 if (ptr->type == RRDC_STATS_TYPE_GAUGE)
272 values[0].gauge = (gauge_t) ptr->value.gauge;
273 else if (ptr->type == RRDC_STATS_TYPE_COUNTER)
274 values[0].counter = (counter_t) ptr->value.counter;
275 else
276 continue;
278 if (strcasecmp ("QueueLength", ptr->name) == 0)
279 {
280 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
281 sstrncpy (vl.type_instance, "", sizeof (vl.type_instance));
282 }
283 else if (strcasecmp ("UpdatesWritten", ptr->name) == 0)
284 {
285 sstrncpy (vl.type, "operations", sizeof (vl.type));
286 sstrncpy (vl.type_instance, "write-updates", sizeof (vl.type_instance));
287 }
288 else if (strcasecmp ("DataSetsWritten", ptr->name) == 0)
289 {
290 sstrncpy (vl.type, "operations", sizeof (vl.type));
291 sstrncpy (vl.type_instance, "write-data_sets",
292 sizeof (vl.type_instance));
293 }
294 else if (strcasecmp ("TreeNodesNumber", ptr->name) == 0)
295 {
296 sstrncpy (vl.type, "gauge", sizeof (vl.type));
297 sstrncpy (vl.type_instance, "tree_nodes", sizeof (vl.type_instance));
298 }
299 else if (strcasecmp ("TreeDepth", ptr->name) == 0)
300 {
301 sstrncpy (vl.type, "gauge", sizeof (vl.type));
302 sstrncpy (vl.type_instance, "tree_depth", sizeof (vl.type_instance));
303 }
304 else if (strcasecmp ("FlushesReceived", ptr->name) == 0)
305 {
306 sstrncpy (vl.type, "operations", sizeof (vl.type));
307 sstrncpy (vl.type_instance, "receive-flush", sizeof (vl.type_instance));
308 }
309 else if (strcasecmp ("JournalBytes", ptr->name) == 0)
310 {
311 sstrncpy (vl.type, "counter", sizeof (vl.type));
312 sstrncpy (vl.type_instance, "journal-bytes", sizeof (vl.type_instance));
313 }
314 else if (strcasecmp ("JournalRotate", ptr->name) == 0)
315 {
316 sstrncpy (vl.type, "counter", sizeof (vl.type));
317 sstrncpy (vl.type_instance, "journal-rotates", sizeof (vl.type_instance));
318 }
319 else if (strcasecmp ("UpdatesReceived", ptr->name) == 0)
320 {
321 sstrncpy (vl.type, "operations", sizeof (vl.type));
322 sstrncpy (vl.type_instance, "receive-update", sizeof (vl.type_instance));
323 }
324 else
325 {
326 DEBUG ("rrdcached plugin: rc_read: Unknown statistic `%s'.", ptr->name);
327 continue;
328 }
330 plugin_dispatch_values (&vl);
331 } /* for (ptr = head; ptr != NULL; ptr = ptr->next) */
333 rrdc_stats_free (head);
335 return (0);
336 } /* int rc_read */
338 static int rc_init (void)
339 {
340 if (config_collect_stats)
341 plugin_register_read ("rrdcached", rc_read);
343 return (0);
344 } /* int rc_init */
346 static int rc_write (const data_set_t *ds, const value_list_t *vl,
347 user_data_t __attribute__((unused)) *user_data)
348 {
349 char filename[PATH_MAX];
350 char values[512];
351 char *values_array[2];
352 int status;
354 if (daemon_address == NULL)
355 {
356 ERROR ("rrdcached plugin: daemon_address == NULL.");
357 plugin_unregister_write ("rrdcached");
358 return (-1);
359 }
361 if (strcmp (ds->type, vl->type) != 0)
362 {
363 ERROR ("rrdcached plugin: DS type does not match value list type");
364 return (-1);
365 }
367 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
368 {
369 ERROR ("rrdcached plugin: value_list_to_filename failed.");
370 return (-1);
371 }
373 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
374 {
375 ERROR ("rrdcached plugin: value_list_to_string failed.");
376 return (-1);
377 }
379 values_array[0] = values;
380 values_array[1] = NULL;
382 if (config_create_files)
383 {
384 struct stat statbuf;
386 status = stat (filename, &statbuf);
387 if (status != 0)
388 {
389 if (errno != ENOENT)
390 {
391 char errbuf[1024];
392 ERROR ("rrdcached plugin: stat (%s) failed: %s",
393 filename, sstrerror (errno, errbuf, sizeof (errbuf)));
394 return (-1);
395 }
397 status = cu_rrd_create_file (filename, ds, vl, &rrdcreate_config);
398 if (status != 0)
399 {
400 ERROR ("rrdcached plugin: cu_rrd_create_file (%s) failed.",
401 filename);
402 return (-1);
403 }
404 }
405 }
407 status = rrdc_connect (daemon_address);
408 if (status != 0)
409 {
410 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
411 daemon_address, status);
412 return (-1);
413 }
415 status = rrdc_update (filename, /* values_num = */ 1, (void *) values_array);
416 if (status != 0)
417 {
418 ERROR ("rrdcached plugin: rrdc_update (%s, [%s], 1) failed with "
419 "status %i.",
420 filename, values_array[0], status);
421 return (-1);
422 }
424 return (0);
425 } /* int rc_write */
427 static int rc_flush (__attribute__((unused)) cdtime_t timeout, /* {{{ */
428 const char *identifier,
429 __attribute__((unused)) user_data_t *ud)
430 {
431 char filename[PATH_MAX + 1];
432 int status;
434 if (identifier == NULL)
435 return (EINVAL);
437 if (datadir != NULL)
438 ssnprintf (filename, sizeof (filename), "%s/%s.rrd", datadir, identifier);
439 else
440 ssnprintf (filename, sizeof (filename), "%s.rrd", identifier);
442 status = rrdc_connect (daemon_address);
443 if (status != 0)
444 {
445 ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
446 daemon_address, status);
447 return (-1);
448 }
450 status = rrdc_flush (filename);
451 if (status != 0)
452 {
453 ERROR ("rrdcached plugin: rrdc_flush (%s) failed with status %i.",
454 filename, status);
455 return (-1);
456 }
457 DEBUG ("rrdcached plugin: rrdc_flush (%s): Success.", filename);
459 return (0);
460 } /* }}} int rc_flush */
462 static int rc_shutdown (void)
463 {
464 rrdc_disconnect ();
465 return (0);
466 } /* int rc_shutdown */
468 void module_register (void)
469 {
470 plugin_register_complex_config ("rrdcached", rc_config);
471 plugin_register_init ("rrdcached", rc_init);
472 plugin_register_shutdown ("rrdcached", rc_shutdown);
473 } /* void module_register */
475 /*
476 * vim: set sw=2 sts=2 et :
477 */