2 * collectd - src/redis.c, based on src/memcached.c
3 * Copyright (C) 2010 Andrés J. Díaz <ajdiaz@connectical.com>
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; either version 2 of the License, or (at your
8 * option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Andrés J. Díaz <ajdiaz@connectical.com>
26 #include "configfile.h"
27 #include "utils_avltree.h"
32 #define REDIS_DEF_HOST "127.0.0.1"
33 #define REDIS_DEF_PORT 6379
34 #define MAX_REDIS_NODE_NAME 64
36 /* Redis plugin configuration example:
47 static c_avl_tree_t *redis_tree = NULL;
48 static pthread_mutex_t redis_lock = PTHREAD_MUTEX_INITIALIZER;
50 typedef struct redis_node_s {
51 char name[MAX_REDIS_NODE_NAME];
52 char host[HOST_NAME_MAX];
57 static int redis_config_node (redis_node_t *rn, oconfig_item_t *ci) /* {{{ */
62 if ((ci->values_num != 1)
63 || (ci->values[0].type != OCONFIG_TYPE_STRING))
65 WARNING ("redis plugin: The `Node' block needs exactly one string "
70 if (ci->children_num < 1)
72 WARNING ("redis plugin: The `Node' block needs at least one option.");
76 sstrncpy (rn->name, ci->values[0].value.string, sizeof (rn->name));
78 for (i = 0; i < ci->children_num; i++)
80 oconfig_item_t *option = ci->children + i;
83 if (strcasecmp ("Host", option->key) == 0)
84 status = cf_util_get_string_buffer (option, rn->host, sizeof (rn->host));
85 else if (strcasecmp ("Port", option->key) == 0)
86 rn->port = cf_util_get_port_number (option);
87 else if (strcasecmp ("Timeout", option->key) == 0)
88 status = cf_util_get_int (option, &rn->timeout);
91 WARNING ("redis plugin: Option `%s' not allowed inside a `Node' "
92 "block.", option->key);
103 static redis_node_t *redis_node_get (const char *name, redis_node_t *rn) /* {{{ */
105 if (c_avl_get (redis_tree, name, (void *) rn) == 0)
111 static int redis_node_add (const redis_node_t *rn) /* {{{ */
114 redis_node_t *rn_copy = NULL;
115 redis_node_t *rn_ptr;
118 rn_copy = (redis_node_t *) malloc (sizeof (redis_node_t));
122 ERROR ("redis plugin: malloc failed adding redis_node to the tree.");
125 memcpy (rn_copy, rn, sizeof (redis_node_t));
126 if (*rn_copy->name == '\0')
128 (void) strncpy(rn_copy->name, "default", sizeof (rn_copy->name)); /* in theory never fails */
131 DEBUG ("redis plugin: adding entry `%s' to the tree.", rn_copy->name);
133 pthread_mutex_lock (&redis_lock);
135 if ( (rn_ptr = redis_node_get (rn_copy->name, &rn_get)) != NULL )
137 WARNING ("redis plugin: the node `%s' override a previous node with same node.", rn_copy->name);
140 status = c_avl_insert (redis_tree, rn_copy->name, rn_copy);
141 pthread_mutex_unlock (&redis_lock);
145 ERROR ("redis plugin: c_avl_insert (%s) failed adding noew node.", rn_copy->name);
153 static int redis_config (oconfig_item_t *ci) /* {{{ */
161 .port = REDIS_DEF_PORT,
165 if (redis_tree == NULL)
167 redis_tree = c_avl_create ((void *) strcmp);
168 if (redis_tree == NULL)
170 ERROR ("redis plugin: c_avl_create failed reading config.");
176 for (i = 0; i < ci->children_num; i++)
178 oconfig_item_t *option = ci->children + i;
180 if (strcasecmp ("Node", option->key) == 0)
182 if ( (status = redis_config_node (&rn, option)) == 0 )
183 status = redis_node_add (&rn);
187 WARNING ("redis plugin: Option `%s' not allowed in redis"
188 " configuration.", option->key);
200 __attribute__ ((nonnull(2)))
201 static void redis_submit_g (char *plugin_instance,
202 const char *type, const char *type_instance,
203 gauge_t value) /* {{{ */
206 value_list_t vl = VALUE_LIST_INIT;
208 values[0].gauge = value;
212 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
213 sstrncpy (vl.plugin, "redis", sizeof (vl.plugin));
214 if (plugin_instance != NULL)
215 sstrncpy (vl.plugin_instance, plugin_instance,
216 sizeof (vl.plugin_instance));
217 sstrncpy (vl.type, type, sizeof (vl.type));
218 if (type_instance != NULL)
219 sstrncpy (vl.type_instance, type_instance,
220 sizeof (vl.type_instance));
222 plugin_dispatch_values (&vl);
225 __attribute__ ((nonnull(2)))
226 static void redis_submit_c (char *plugin_instance,
227 const char *type, const char *type_instance,
228 counter_t value) /* {{{ */
231 value_list_t vl = VALUE_LIST_INIT;
233 values[0].counter = value;
237 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
238 sstrncpy (vl.plugin, "redis", sizeof (vl.plugin));
239 if (plugin_instance != NULL)
240 sstrncpy (vl.plugin_instance, plugin_instance,
241 sizeof (vl.plugin_instance));
242 sstrncpy (vl.type, type, sizeof (vl.type));
243 if (type_instance != NULL)
244 sstrncpy (vl.type_instance, type_instance,
245 sizeof (vl.type_instance));
247 plugin_dispatch_values (&vl);
250 static int redis_read (void) /* {{{ */
257 c_avl_iterator_t *iter;
261 if ( (iter = c_avl_get_iterator (redis_tree)) == NULL )
263 ERROR ("redis plugin: unable to iterate redis tree.");
267 while (c_avl_iterator_next (iter, (void *) &key, (void *) &rn) == 0)
269 DEBUG ("redis plugin: querying info from node `%s' (%s:%d).", rn->name, rn->host, rn->port);
271 if ( (rh = credis_connect (rn->host, rn->port, rn->timeout)) == NULL )
273 ERROR ("redis plugin: unable to connect to node `%s' (%s:%d).", rn->name, rn->host, rn->port);
278 if ( (status = credis_info (rh, &info)) == -1 )
280 WARNING ("redis plugin: unable to get info from node `%s'.", rn->name);
285 /* typedef struct _cr_info {
286 * char redis_version[CREDIS_VERSION_STRING_SIZE];
287 * int bgsave_in_progress;
288 * int connected_clients;
289 * int connected_slaves;
290 * unsigned int used_memory;
291 * long long changes_since_last_save;
292 * int last_save_time;
293 * long long total_connections_received;
294 * long long total_commands_processed;
295 * int uptime_in_seconds;
296 * int uptime_in_days;
300 DEBUG ("redis plugin: received info from node `%s': connected_clients = %d; "
301 "connected_slaves = %d; used_memory = %lu; changes_since_last_save = %lld; "
302 "bgsave_in_progress = %d; total_connections_received = %lld; "
303 "total_commands_processed = %lld; uptime_in_seconds = %ld", rn->name,
304 info.connected_clients, info.connected_slaves, info.used_memory,
305 info.changes_since_last_save, info.bgsave_in_progress,
306 info.total_connections_received, info.total_commands_processed,
307 info.uptime_in_seconds);
309 redis_submit_g (rn->name, "connected_clients", NULL, info.connected_clients);
310 redis_submit_g (rn->name, "connected_slaves", NULL, info.connected_slaves);
311 redis_submit_g (rn->name, "used_memory", NULL, info.used_memory);
312 redis_submit_g (rn->name, "changes_since_last_save", NULL, info.changes_since_last_save);
313 redis_submit_g (rn->name, "bgsave_in_progress", NULL, info.bgsave_in_progress);
314 redis_submit_c (rn->name, "total_connections_received", NULL, info.total_connections_received);
315 redis_submit_c (rn->name, "total_commands_processed", NULL, info.total_commands_processed);
316 redis_submit_c (rn->name, "uptime_in_seconds", NULL, info.uptime_in_seconds);
322 c_avl_iterator_destroy(iter);
332 void module_register (void) /* {{{ */
334 plugin_register_complex_config ("redis", redis_config);
335 plugin_register_read ("redis", redis_read);
336 /* TODO: plugin_register_write: one redis list per value id with
341 /* vim: set sw=2 sts=2 et fdm=marker : */