2 * collectd - src/utils_format_kairosdb.c
3 * Copyright (C) 2016 Aurelien beorn Rougemont
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
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10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * DEALINGS IN THE SOFTWARE.
24 * Aurelien beorn Rougemont <beorn at gandi dot net>
32 #include "utils_cache.h"
33 #include "utils_format_kairosdb.h"
35 /* This is the KAIROSDB format for write_http output
40 * "name":"collectd.vmem"
43 * [1453897164060, 97.000000]
47 * "host": "fqdn.domain.tld",
48 * "plugin_instance": "vmpage_number",
49 * "type": "kernel_stack",
57 static int kairosdb_escape_string(char *buffer, size_t buffer_size, /* {{{ */
61 if ((buffer == NULL) || (string == NULL))
69 #define BUFFER_ADD(c) \
71 if (dst_pos >= (buffer_size - 1)) { \
72 buffer[buffer_size - 1] = 0; \
75 buffer[dst_pos] = (c); \
79 /* Escape special characters */
80 /* authorize -_. and alpha num but also escapes " */
82 for (size_t src_pos = 0; string[src_pos] != 0; src_pos++) {
83 if (isalnum(string[src_pos]) || 0x2d == string[src_pos] ||
84 0x2e == string[src_pos] || 0x5f == string[src_pos])
85 BUFFER_ADD(tolower(string[src_pos]));
93 } /* }}} int kairosdb_escape_string */
95 static int values_to_kairosdb(char *buffer, size_t buffer_size, /* {{{ */
96 const data_set_t *ds, const value_list_t *vl,
97 int store_rates, size_t ds_idx) {
99 gauge_t *rates = NULL;
101 memset(buffer, 0, buffer_size);
103 #define BUFFER_ADD(...) \
106 status = ssnprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
110 } else if (((size_t)status) >= (buffer_size - offset)) { \
114 offset += ((size_t)status); \
117 if (ds->ds[ds_idx].type == DS_TYPE_GAUGE) {
118 if (isfinite(vl->values[ds_idx].gauge)) {
120 BUFFER_ADD("%" PRIu64, CDTIME_T_TO_MS(vl->time));
122 BUFFER_ADD(JSON_GAUGE_FORMAT, vl->values[ds_idx].gauge);
124 DEBUG("utils_format_kairosdb: invalid vl->values[ds_idx].gauge for "
126 vl->plugin, vl->plugin_instance, vl->type, vl->type_instance,
127 ds->ds[ds_idx].name);
130 } else if (store_rates) {
132 rates = uc_get_rate(ds, vl);
134 WARNING("utils_format_kairosdb: uc_get_rate failed for %s|%s|%s|%s|%s",
135 vl->plugin, vl->plugin_instance, vl->type, vl->type_instance,
136 ds->ds[ds_idx].name);
141 if (isfinite(rates[ds_idx])) {
143 BUFFER_ADD("%" PRIu64, CDTIME_T_TO_MS(vl->time));
145 BUFFER_ADD(JSON_GAUGE_FORMAT, rates[ds_idx]);
147 WARNING("utils_format_kairosdb: invalid rates[ds_idx] for %s|%s|%s|%s|%s",
148 vl->plugin, vl->plugin_instance, vl->type, vl->type_instance,
149 ds->ds[ds_idx].name);
153 } else if (ds->ds[ds_idx].type == DS_TYPE_COUNTER) {
155 BUFFER_ADD("%" PRIu64, CDTIME_T_TO_MS(vl->time));
157 BUFFER_ADD("%llu", vl->values[ds_idx].counter);
158 } else if (ds->ds[ds_idx].type == DS_TYPE_DERIVE) {
160 BUFFER_ADD("%" PRIu64, CDTIME_T_TO_MS(vl->time));
162 BUFFER_ADD("%" PRIi64, vl->values[ds_idx].derive);
163 } else if (ds->ds[ds_idx].type == DS_TYPE_ABSOLUTE) {
165 BUFFER_ADD("%" PRIu64, CDTIME_T_TO_MS(vl->time));
167 BUFFER_ADD("%" PRIu64, vl->values[ds_idx].absolute);
169 ERROR("format_kairosdb: Unknown data source type: %i", ds->ds[ds_idx].type);
177 DEBUG("format_kairosdb: values_to_kairosdb: buffer = %s;", buffer);
180 } /* }}} int values_to_kairosdb */
182 static int value_list_to_kairosdb(char *buffer, size_t buffer_size, /* {{{ */
183 const data_set_t *ds, const value_list_t *vl,
185 char const *const *http_attrs,
186 size_t http_attrs_num, int data_ttl) {
191 memset(buffer, 0, buffer_size);
193 #define BUFFER_ADD(...) \
195 status = ssnprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
198 else if (((size_t)status) >= (buffer_size - offset)) \
201 offset += ((size_t)status); \
204 #define BUFFER_ADD_KEYVAL(key, value) \
206 status = kairosdb_escape_string(temp, sizeof(temp), (value)); \
209 BUFFER_ADD(",\"%s\": %s", (key), temp); \
212 for (size_t i = 0; i < ds->ds_num; i++) {
213 /* All value lists have a leading comma. The first one will be replaced with
214 * a square bracket in `format_kairosdb_finalize'. */
217 BUFFER_ADD("\"name\":\"collectd");
219 BUFFER_ADD(".%s", vl->plugin);
221 status = values_to_kairosdb(temp, sizeof(temp), ds, vl, store_rates, i);
225 BUFFER_ADD("\", \"datapoints\": %s", temp);
228 * Now adds meta data to metric as tags
231 memset(temp, 0, sizeof(temp));
234 BUFFER_ADD(", \"ttl\": %i", data_ttl);
236 BUFFER_ADD(", \"tags\":\{");
238 BUFFER_ADD("\"host\": \"%s\"", vl->host);
239 for (size_t j = 0; j < http_attrs_num; j += 2) {
240 BUFFER_ADD(", \"%s\":", http_attrs[j]);
241 BUFFER_ADD(" \"%s\"", http_attrs[j + 1]);
244 if (strlen(vl->plugin_instance))
245 BUFFER_ADD_KEYVAL("plugin_instance", vl->plugin_instance);
246 BUFFER_ADD_KEYVAL("type", vl->type);
247 if (strlen(vl->type_instance))
248 BUFFER_ADD_KEYVAL("type_instance", vl->type_instance);
250 BUFFER_ADD_KEYVAL("ds", ds->ds[i].name);
252 } /* for ds->ds_num */
254 #undef BUFFER_ADD_KEYVAL
257 DEBUG("format_kairosdb: value_list_to_kairosdb: buffer = %s;", buffer);
260 } /* }}} int value_list_to_kairosdb */
262 static int format_kairosdb_value_list_nocheck(
263 char *buffer, /* {{{ */
264 size_t *ret_buffer_fill, size_t *ret_buffer_free, const data_set_t *ds,
265 const value_list_t *vl, int store_rates, size_t temp_size,
266 char const *const *http_attrs, size_t http_attrs_num, int data_ttl) {
267 char temp[temp_size];
270 status = value_list_to_kairosdb(temp, sizeof(temp), ds, vl, store_rates,
271 http_attrs, http_attrs_num, data_ttl);
274 temp_size = strlen(temp);
276 memcpy(buffer + (*ret_buffer_fill), temp, temp_size + 1);
277 (*ret_buffer_fill) += temp_size;
278 (*ret_buffer_free) -= temp_size;
281 } /* }}} int format_kairosdb_value_list_nocheck */
283 int format_kairosdb_initialize(char *buffer, /* {{{ */
284 size_t *ret_buffer_fill,
285 size_t *ret_buffer_free) {
289 if ((buffer == NULL) || (ret_buffer_fill == NULL) ||
290 (ret_buffer_free == NULL))
293 buffer_fill = *ret_buffer_fill;
294 buffer_free = *ret_buffer_free;
296 buffer_free = buffer_fill + buffer_free;
302 memset(buffer, 0, buffer_free);
303 *ret_buffer_fill = buffer_fill;
304 *ret_buffer_free = buffer_free;
307 } /* }}} int format_kairosdb_initialize */
309 int format_kairosdb_finalize(char *buffer, /* {{{ */
310 size_t *ret_buffer_fill, size_t *ret_buffer_free) {
313 if ((buffer == NULL) || (ret_buffer_fill == NULL) ||
314 (ret_buffer_free == NULL))
317 if (*ret_buffer_free < 2)
320 /* Replace the leading comma added in `value_list_to_kairosdb' with a square
322 if (buffer[0] != ',')
326 pos = *ret_buffer_fill;
330 (*ret_buffer_fill)++;
331 (*ret_buffer_free)--;
334 } /* }}} int format_kairosdb_finalize */
336 int format_kairosdb_value_list(char *buffer, /* {{{ */
337 size_t *ret_buffer_fill, size_t *ret_buffer_free,
338 const data_set_t *ds, const value_list_t *vl,
339 int store_rates, char const *const *http_attrs,
340 size_t http_attrs_num, int data_ttl) {
341 if ((buffer == NULL) || (ret_buffer_fill == NULL) ||
342 (ret_buffer_free == NULL) || (ds == NULL) || (vl == NULL))
345 if (*ret_buffer_free < 3)
348 return format_kairosdb_value_list_nocheck(buffer, ret_buffer_fill,
349 ret_buffer_free, ds, vl,
351 (*ret_buffer_free) - 2,
352 http_attrs, http_attrs_num,
354 } /* }}} int format_kairosdb_value_list */
356 /* vim: set sw=2 sts=2 et fdm=marker : */