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 /* this can probably only be found in the kernel sources */
46 #if HAVE_LINUX_IP_VS_H
47 #include <linux/ip_vs.h>
48 #elif HAVE_NET_IP_VS_H
49 #include <net/ip_vs.h>
52 #endif /* HAVE_IP_VS_H */
54 #define log_err(...) ERROR("ipvs: " __VA_ARGS__)
55 #define log_info(...) INFO("ipvs: " __VA_ARGS__)
60 static int sockfd = -1;
65 static struct ip_vs_get_services *ipvs_get_services(void) {
66 struct ip_vs_getinfo ipvs_info;
67 struct ip_vs_get_services *services;
69 socklen_t len = sizeof(ipvs_info);
71 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_INFO, &ipvs_info, &len) ==
74 log_err("ip_vs_get_services: getsockopt() failed: %s",
75 sstrerror(errno, errbuf, sizeof(errbuf)));
79 len = sizeof(*services) +
80 sizeof(struct ip_vs_service_entry) * ipvs_info.num_services;
82 services = malloc(len);
83 if (services == NULL) {
84 log_err("ipvs_get_services: Out of memory.");
88 services->num_services = ipvs_info.num_services;
90 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_SERVICES, services, &len) ==
93 log_err("ipvs_get_services: getsockopt failed: %s",
94 sstrerror(errno, errbuf, sizeof(errbuf)));
100 } /* ipvs_get_services */
102 static struct ip_vs_get_dests *ipvs_get_dests(struct ip_vs_service_entry *se) {
103 struct ip_vs_get_dests *dests;
106 sizeof(*dests) + sizeof(struct ip_vs_dest_entry) * se->num_dests;
110 log_err("ipvs_get_dests: Out of memory.");
114 dests->fwmark = se->fwmark;
115 dests->protocol = se->protocol;
116 dests->addr = se->addr;
117 dests->port = se->port;
118 dests->num_dests = se->num_dests;
120 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_DESTS, dests, &len) == -1) {
122 log_err("ipvs_get_dests: getsockopt() failed: %s",
123 sstrerror(errno, errbuf, sizeof(errbuf)));
128 } /* ip_vs_get_dests */
131 * collectd plugin API and helper functions
133 static int cipvs_init(void) {
134 struct ip_vs_getinfo ipvs_info;
136 if ((sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) == -1) {
138 log_err("cipvs_init: socket() failed: %s",
139 sstrerror(errno, errbuf, sizeof(errbuf)));
143 socklen_t len = sizeof(ipvs_info);
145 if (getsockopt(sockfd, IPPROTO_IP, IP_VS_SO_GET_INFO, &ipvs_info, &len) ==
148 log_err("cipvs_init: getsockopt() failed: %s",
149 sstrerror(errno, errbuf, sizeof(errbuf)));
155 /* we need IPVS >= 1.1.4 */
156 if (ipvs_info.version < ((1 << 16) + (1 << 8) + 4)) {
157 log_err("cipvs_init: IPVS version too old (%d.%d.%d < %d.%d.%d)",
158 NVERSION(ipvs_info.version), 1, 1, 4);
163 log_info("Successfully connected to IPVS %d.%d.%d",
164 NVERSION(ipvs_info.version));
170 * ipvs-<virtual IP>_{UDP,TCP}<port>/<type>-total
171 * ipvs-<virtual IP>_{UDP,TCP}<port>/<type>-<real IP>_<port>
174 /* plugin instance */
175 static int get_pi(struct ip_vs_service_entry *se, char *pi, size_t size) {
176 if ((se == NULL) || (pi == NULL))
179 struct in_addr addr = {.s_addr = se->addr};
182 ssnprintf(pi, size, "%s_%s%u", inet_ntoa(addr),
183 (se->protocol == IPPROTO_TCP) ? "TCP" : "UDP", ntohs(se->port));
185 if ((len < 0) || (size <= ((size_t)len))) {
186 log_err("plugin instance truncated: %s", pi);
193 static int get_ti(struct ip_vs_dest_entry *de, char *ti, size_t size) {
194 if ((de == NULL) || (ti == NULL))
197 struct in_addr addr = {.s_addr = de->addr};
199 int len = ssnprintf(ti, size, "%s_%u", inet_ntoa(addr), ntohs(de->port));
201 if ((len < 0) || (size <= ((size_t)len))) {
202 log_err("type instance truncated: %s", ti);
208 static void cipvs_submit_connections(const char *pi, const char *ti,
210 value_list_t vl = VALUE_LIST_INIT;
212 vl.values = &(value_t){.derive = value};
215 sstrncpy(vl.plugin, "ipvs", sizeof(vl.plugin));
216 sstrncpy(vl.plugin_instance, pi, sizeof(vl.plugin_instance));
217 sstrncpy(vl.type, "connections", sizeof(vl.type));
218 sstrncpy(vl.type_instance, (ti != NULL) ? ti : "total",
219 sizeof(vl.type_instance));
221 plugin_dispatch_values(&vl);
222 } /* cipvs_submit_connections */
224 static void cipvs_submit_if(const char *pi, const char *t, const char *ti,
225 derive_t rx, derive_t tx) {
227 {.derive = rx}, {.derive = tx},
229 value_list_t vl = VALUE_LIST_INIT;
232 vl.values_len = STATIC_ARRAY_SIZE(values);
234 sstrncpy(vl.plugin, "ipvs", sizeof(vl.plugin));
235 sstrncpy(vl.plugin_instance, pi, sizeof(vl.plugin_instance));
236 sstrncpy(vl.type, t, sizeof(vl.type));
237 sstrncpy(vl.type_instance, (ti != NULL) ? ti : "total",
238 sizeof(vl.type_instance));
240 plugin_dispatch_values(&vl);
241 } /* cipvs_submit_if */
243 static void cipvs_submit_dest(const char *pi, struct ip_vs_dest_entry *de) {
244 struct ip_vs_stats_user stats = de->stats;
246 char ti[DATA_MAX_NAME_LEN];
248 if (get_ti(de, ti, sizeof(ti)) != 0)
251 cipvs_submit_connections(pi, ti, stats.conns);
252 cipvs_submit_if(pi, "if_packets", ti, stats.inpkts, stats.outpkts);
253 cipvs_submit_if(pi, "if_octets", ti, stats.inbytes, stats.outbytes);
254 } /* cipvs_submit_dest */
256 static void cipvs_submit_service(struct ip_vs_service_entry *se) {
257 struct ip_vs_stats_user stats = se->stats;
258 struct ip_vs_get_dests *dests = ipvs_get_dests(se);
260 char pi[DATA_MAX_NAME_LEN];
262 if (get_pi(se, pi, sizeof(pi)) != 0) {
267 cipvs_submit_connections(pi, NULL, stats.conns);
268 cipvs_submit_if(pi, "if_packets", NULL, stats.inpkts, stats.outpkts);
269 cipvs_submit_if(pi, "if_octets", NULL, stats.inbytes, stats.outbytes);
271 for (size_t i = 0; i < dests->num_dests; ++i)
272 cipvs_submit_dest(pi, &dests->entrytable[i]);
276 } /* cipvs_submit_service */
278 static int cipvs_read(void) {
282 struct ip_vs_get_services *services = ipvs_get_services();
283 if (services == NULL)
286 for (size_t i = 0; i < services->num_services; ++i)
287 cipvs_submit_service(&services->entrytable[i]);
293 static int cipvs_shutdown(void) {
299 } /* cipvs_shutdown */
301 void module_register(void) {
302 plugin_register_init("ipvs", cipvs_init);
303 plugin_register_read("ipvs", cipvs_read);
304 plugin_register_shutdown("ipvs", cipvs_shutdown);
306 } /* module_register */