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)
67 struct ip_vs_getinfo ipvs_info;
68 struct ip_vs_get_services *ret;
72 len = sizeof (ipvs_info);
74 if (0 != getsockopt (sockfd, IPPROTO_IP, IP_VS_SO_GET_INFO,
75 (void *)&ipvs_info, &len)) {
77 log_err ("ip_vs_get_services: getsockopt() failed: %s",
78 sstrerror (errno, errbuf, sizeof (errbuf)));
83 sizeof (struct ip_vs_service_entry) * ipvs_info.num_services;
85 if (NULL == (ret = malloc (len))) {
86 log_err ("ipvs_get_services: Out of memory.");
90 ret->num_services = ipvs_info.num_services;
92 if (0 != getsockopt (sockfd, IPPROTO_IP, IP_VS_SO_GET_SERVICES,
95 log_err ("ipvs_get_services: getsockopt failed: %s",
96 sstrerror (errno, errbuf, sizeof (errbuf)));
102 } /* ipvs_get_services */
104 static struct ip_vs_get_dests *ipvs_get_dests (struct ip_vs_service_entry *se)
106 struct ip_vs_get_dests *ret;
109 len = sizeof (*ret) + sizeof (struct ip_vs_dest_entry) * se->num_dests;
111 if (NULL == (ret = malloc (len))) {
112 log_err ("ipvs_get_dests: Out of memory.");
116 ret->fwmark = se->fwmark;
117 ret->protocol = se->protocol;
118 ret->addr = se->addr;
119 ret->port = se->port;
120 ret->num_dests = se->num_dests;
122 if (0 != getsockopt (sockfd, IPPROTO_IP, IP_VS_SO_GET_DESTS,
123 (void *)ret, &len)) {
125 log_err ("ipvs_get_dests: getsockopt() failed: %s",
126 sstrerror (errno, errbuf, sizeof (errbuf)));
131 } /* ip_vs_get_dests */
134 * collectd plugin API and helper functions
136 static int cipvs_init (void)
138 struct ip_vs_getinfo ipvs_info;
142 if (-1 == (sockfd = socket (AF_INET, SOCK_RAW, IPPROTO_RAW))) {
144 log_err ("cipvs_init: socket() failed: %s",
145 sstrerror (errno, errbuf, sizeof (errbuf)));
149 len = sizeof (ipvs_info);
151 if (0 != getsockopt (sockfd, IPPROTO_IP, IP_VS_SO_GET_INFO,
152 (void *)&ipvs_info, &len)) {
154 log_err ("cipvs_init: getsockopt() failed: %s",
155 sstrerror (errno, errbuf, sizeof (errbuf)));
161 /* we need IPVS >= 1.1.4 */
162 if (ipvs_info.version < ((1 << 16) + (1 << 8) + 4)) {
163 log_err ("cipvs_init: IPVS version too old (%d.%d.%d < %d.%d.%d)",
164 NVERSION (ipvs_info.version), 1, 1, 4);
170 log_info ("Successfully connected to IPVS %d.%d.%d",
171 NVERSION (ipvs_info.version));
177 * ipvs-<virtual IP>_{UDP,TCP}<port>/<type>-total
178 * ipvs-<virtual IP>_{UDP,TCP}<port>/<type>-<real IP>_<port>
181 /* plugin instance */
182 static int get_pi (struct ip_vs_service_entry *se, char *pi, size_t size)
187 if ((NULL == se) || (NULL == pi))
190 addr.s_addr = se->addr;
192 /* inet_ntoa() returns a pointer to a statically allocated buffer
193 * I hope non-glibc systems behave the same */
194 len = ssnprintf (pi, size, "%s_%s%u", inet_ntoa (addr),
195 (se->protocol == IPPROTO_TCP) ? "TCP" : "UDP",
198 if ((0 > len) || (size <= ((size_t) len))) {
199 log_err ("plugin instance truncated: %s", pi);
206 static int get_ti (struct ip_vs_dest_entry *de, char *ti, size_t size)
211 if ((NULL == de) || (NULL == ti))
214 addr.s_addr = de->addr;
216 /* inet_ntoa() returns a pointer to a statically allocated buffer
217 * I hope non-glibc systems behave the same */
218 len = ssnprintf (ti, size, "%s_%u", inet_ntoa (addr),
221 if ((0 > len) || (size <= ((size_t) len))) {
222 log_err ("type instance truncated: %s", ti);
228 static void cipvs_submit_connections (const char *pi, const char *ti,
232 value_list_t vl = VALUE_LIST_INIT;
234 values[0].derive = value;
239 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
240 sstrncpy (vl.plugin, "ipvs", sizeof (vl.plugin));
241 sstrncpy (vl.plugin_instance, pi, sizeof (vl.plugin_instance));
242 sstrncpy (vl.type, "connections", sizeof (vl.type));
243 sstrncpy (vl.type_instance, (NULL != ti) ? ti : "total",
244 sizeof (vl.type_instance));
246 plugin_dispatch_values (&vl);
248 } /* cipvs_submit_connections */
250 static void cipvs_submit_if (const char *pi, const char *t, const char *ti,
251 derive_t rx, derive_t tx)
254 value_list_t vl = VALUE_LIST_INIT;
256 values[0].derive = rx;
257 values[1].derive = tx;
262 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
263 sstrncpy (vl.plugin, "ipvs", sizeof (vl.plugin));
264 sstrncpy (vl.plugin_instance, pi, sizeof (vl.plugin_instance));
265 sstrncpy (vl.type, t, sizeof (vl.type));
266 sstrncpy (vl.type_instance, (NULL != ti) ? ti : "total",
267 sizeof (vl.type_instance));
269 plugin_dispatch_values (&vl);
271 } /* cipvs_submit_if */
273 static void cipvs_submit_dest (const char *pi, struct ip_vs_dest_entry *de)
275 struct ip_vs_stats_user stats = de->stats;
277 char ti[DATA_MAX_NAME_LEN];
279 if (0 != get_ti (de, ti, sizeof (ti)))
282 cipvs_submit_connections (pi, ti, stats.conns);
283 cipvs_submit_if (pi, "if_packets", ti, stats.inpkts, stats.outpkts);
284 cipvs_submit_if (pi, "if_octets", ti, stats.inbytes, stats.outbytes);
286 } /* cipvs_submit_dest */
288 static void cipvs_submit_service (struct ip_vs_service_entry *se)
290 struct ip_vs_stats_user stats = se->stats;
291 struct ip_vs_get_dests *dests = ipvs_get_dests (se);
293 char pi[DATA_MAX_NAME_LEN];
295 if (0 != get_pi (se, pi, sizeof (pi)))
301 cipvs_submit_connections (pi, NULL, stats.conns);
302 cipvs_submit_if (pi, "if_packets", NULL, stats.inpkts, stats.outpkts);
303 cipvs_submit_if (pi, "if_octets", NULL, stats.inbytes, stats.outbytes);
305 for (size_t i = 0; i < dests->num_dests; ++i)
306 cipvs_submit_dest (pi, &dests->entrytable[i]);
310 } /* cipvs_submit_service */
312 static int cipvs_read (void)
314 struct ip_vs_get_services *services = NULL;
319 if (NULL == (services = ipvs_get_services ()))
322 for (size_t i = 0; i < services->num_services; ++i)
323 cipvs_submit_service (&services->entrytable[i]);
329 static int cipvs_shutdown (void)
336 } /* cipvs_shutdown */
338 void module_register (void)
340 plugin_register_init ("ipvs", cipvs_init);
341 plugin_register_read ("ipvs", cipvs_read);
342 plugin_register_shutdown ("ipvs", cipvs_shutdown);
344 } /* module_register */
346 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */