2 * collectd - src/ipvs.c (based on ipvsadm and libipvs)
3 * Copyright (C) 1997 Steven Clarke <steven@monmouth.demon.co.uk>
4 * Copyright (C) 1998-2004 Wensong Zhang <wensong@linuxvirtualserver.org>
5 * Copyright (C) 2003-2004 Peter Kese <peter.kese@ijs.si>
6 * Copyright (C) 2007 Sebastian Harl
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; only version 2 of the License is applicable.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * Sebastian Harl <sh at tokkee.org>
26 * This plugin collects statistics about IPVS connections. It requires Linux
29 * See http://www.linuxvirtualserver.org/software/index.html for more
30 * information about IPVS.
39 #include <arpa/inet.h>
40 #endif /* HAVE_ARPA_INET_H */
42 #include <netinet/in.h>
43 #endif /* HAVE_NETINET_IN_H */
45 #include <linux/ip_vs.h>
47 #define log_err(...) ERROR("ipvs: " __VA_ARGS__)
48 #define log_info(...) INFO("ipvs: " __VA_ARGS__)
53 static int sockfd = -1;
58 static struct ip_vs_get_services *ipvs_get_services(void) {
59 struct ip_vs_getinfo ipvs_info;
60 struct ip_vs_get_services *services;
62 socklen_t len = sizeof(ipvs_info);
64 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_INFO, &ipvs_info, &len) ==
67 log_err("ip_vs_get_services: getsockopt() failed: %s",
68 sstrerror(errno, errbuf, sizeof(errbuf)));
72 len = sizeof(*services) +
73 sizeof(struct ip_vs_service_entry) * ipvs_info.num_services;
75 services = malloc(len);
76 if (services == NULL) {
77 log_err("ipvs_get_services: Out of memory.");
81 services->num_services = ipvs_info.num_services;
83 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_SERVICES, services, &len) ==
86 log_err("ipvs_get_services: getsockopt failed: %s",
87 sstrerror(errno, errbuf, sizeof(errbuf)));
93 } /* ipvs_get_services */
95 static struct ip_vs_get_dests *ipvs_get_dests(struct ip_vs_service_entry *se) {
96 struct ip_vs_get_dests *dests;
99 sizeof(*dests) + sizeof(struct ip_vs_dest_entry) * se->num_dests;
103 log_err("ipvs_get_dests: Out of memory.");
107 dests->fwmark = se->fwmark;
108 dests->protocol = se->protocol;
109 dests->addr = se->addr;
110 dests->port = se->port;
111 dests->num_dests = se->num_dests;
113 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_DESTS, dests, &len) == -1) {
115 log_err("ipvs_get_dests: getsockopt() failed: %s",
116 sstrerror(errno, errbuf, sizeof(errbuf)));
121 } /* ip_vs_get_dests */
124 * collectd plugin API and helper functions
126 static int cipvs_init(void) {
127 struct ip_vs_getinfo ipvs_info;
129 if ((sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) == -1) {
131 log_err("cipvs_init: socket() failed: %s",
132 sstrerror(errno, errbuf, sizeof(errbuf)));
136 socklen_t len = sizeof(ipvs_info);
138 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_INFO, &ipvs_info, &len) ==
141 log_err("cipvs_init: getsockopt() failed: %s",
142 sstrerror(errno, errbuf, sizeof(errbuf)));
148 /* we need IPVS >= 1.1.4 */
149 if (ipvs_info.version < ((1 << 16) + (1 << 8) + 4)) {
150 log_err("cipvs_init: IPVS version too old (%d.%d.%d < %d.%d.%d)",
151 NVERSION(ipvs_info.version), 1, 1, 4);
156 log_info("Successfully connected to IPVS %d.%d.%d",
157 NVERSION(ipvs_info.version));
163 * ipvs-<virtual IP>_{UDP,TCP}<port>/<type>-total
164 * ipvs-<virtual IP>_{UDP,TCP}<port>/<type>-<real IP>_<port>
167 /* plugin instance */
168 static int get_pi(struct ip_vs_service_entry *se, char *pi, size_t size) {
169 if ((se == NULL) || (pi == NULL))
172 struct in_addr addr = {.s_addr = se->addr};
175 snprintf(pi, size, "%s_%s%u", inet_ntoa(addr),
176 (se->protocol == IPPROTO_TCP) ? "TCP" : "UDP", ntohs(se->port));
178 if ((len < 0) || (size <= ((size_t)len))) {
179 log_err("plugin instance truncated: %s", pi);
186 static int get_ti(struct ip_vs_dest_entry *de, char *ti, size_t size) {
187 if ((de == NULL) || (ti == NULL))
190 struct in_addr addr = {.s_addr = de->addr};
192 int len = snprintf(ti, size, "%s_%u", inet_ntoa(addr), ntohs(de->port));
194 if ((len < 0) || (size <= ((size_t)len))) {
195 log_err("type instance truncated: %s", ti);
201 static void cipvs_submit_connections(const char *pi, const char *ti,
203 value_list_t vl = VALUE_LIST_INIT;
205 vl.values = &(value_t){.derive = value};
208 sstrncpy(vl.plugin, "ipvs", sizeof(vl.plugin));
209 sstrncpy(vl.plugin_instance, pi, sizeof(vl.plugin_instance));
210 sstrncpy(vl.type, "connections", sizeof(vl.type));
211 sstrncpy(vl.type_instance, (ti != NULL) ? ti : "total",
212 sizeof(vl.type_instance));
214 plugin_dispatch_values(&vl);
215 } /* cipvs_submit_connections */
217 static void cipvs_submit_if(const char *pi, const char *t, const char *ti,
218 derive_t rx, derive_t tx) {
220 {.derive = rx}, {.derive = tx},
222 value_list_t vl = VALUE_LIST_INIT;
225 vl.values_len = STATIC_ARRAY_SIZE(values);
227 sstrncpy(vl.plugin, "ipvs", sizeof(vl.plugin));
228 sstrncpy(vl.plugin_instance, pi, sizeof(vl.plugin_instance));
229 sstrncpy(vl.type, t, sizeof(vl.type));
230 sstrncpy(vl.type_instance, (ti != NULL) ? ti : "total",
231 sizeof(vl.type_instance));
233 plugin_dispatch_values(&vl);
234 } /* cipvs_submit_if */
236 static void cipvs_submit_dest(const char *pi, struct ip_vs_dest_entry *de) {
237 struct ip_vs_stats_user stats = de->stats;
239 char ti[DATA_MAX_NAME_LEN];
241 if (get_ti(de, ti, sizeof(ti)) != 0)
244 cipvs_submit_connections(pi, ti, stats.conns);
245 cipvs_submit_if(pi, "if_packets", ti, stats.inpkts, stats.outpkts);
246 cipvs_submit_if(pi, "if_octets", ti, stats.inbytes, stats.outbytes);
247 } /* cipvs_submit_dest */
249 static void cipvs_submit_service(struct ip_vs_service_entry *se) {
250 struct ip_vs_stats_user stats = se->stats;
251 struct ip_vs_get_dests *dests = ipvs_get_dests(se);
253 char pi[DATA_MAX_NAME_LEN];
255 if (get_pi(se, pi, sizeof(pi)) != 0) {
260 cipvs_submit_connections(pi, NULL, stats.conns);
261 cipvs_submit_if(pi, "if_packets", NULL, stats.inpkts, stats.outpkts);
262 cipvs_submit_if(pi, "if_octets", NULL, stats.inbytes, stats.outbytes);
264 for (size_t i = 0; i < dests->num_dests; ++i)
265 cipvs_submit_dest(pi, &dests->entrytable[i]);
269 } /* cipvs_submit_service */
271 static int cipvs_read(void) {
275 struct ip_vs_get_services *services = ipvs_get_services();
276 if (services == NULL)
279 for (size_t i = 0; i < services->num_services; ++i)
280 cipvs_submit_service(&services->entrytable[i]);
286 static int cipvs_shutdown(void) {
292 } /* cipvs_shutdown */
294 void module_register(void) {
295 plugin_register_init("ipvs", cipvs_init);
296 plugin_register_read("ipvs", cipvs_read);
297 plugin_register_shutdown("ipvs", cipvs_shutdown);
299 } /* module_register */