src/vserver.c

   1 /**
   2  * collectd - src/vserver.c
   3  * Copyright (C) 2006,2007  Sebastian Harl
   4  *
   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; only version 2 of the license is applicable.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  17  *
  18  * Authors:
  19  *   Sebastian Harl <sh at tokkee.org>
  20  **/
  21
  22 #include "collectd.h"
  23 #include "common.h"
  24 #include "plugin.h"
  25
  26 #include <dirent.h>
  27 #include <sys/types.h>
  28
  29 #define BUFSIZE 512
  30
  31 #define PROCDIR "/proc/virtual"
  32
  33 #if !KERNEL_LINUX
  34 # error "No applicable input method."
  35 #endif
  36
  37 static int pagesize = 0;
  38
  39 static int vserver_init (void)
  40 {
  41         /* XXX Should we check for getpagesize () in configure?
  42          * What's the right thing to do, if there is no getpagesize ()? */
  43         pagesize = getpagesize ();
  44
  45         return (0);
  46 } /* static void vserver_init(void) */
  47
  48 static void traffic_submit (const char *plugin_instance,
  49                 const char *type_instance, counter_t rx, counter_t tx)
  50 {
  51         value_t values[2];
  52         value_list_t vl = VALUE_LIST_INIT;
  53
  54         values[0].counter = rx;
  55         values[1].counter = tx;
  56
  57         vl.values = values;
  58         vl.values_len = STATIC_ARRAY_SIZE (values);
  59         vl.time = time (NULL);
  60         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
  61         sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
  62         sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
  63         sstrncpy (vl.type, "if_octets", sizeof (vl.type));
  64         sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
  65
  66         plugin_dispatch_values (&vl);
  67 } /* void traffic_submit */
  68
  69 static void load_submit (const char *plugin_instance,
  70                 gauge_t snum, gauge_t mnum, gauge_t lnum)
  71 {
  72         value_t values[3];
  73         value_list_t vl = VALUE_LIST_INIT;
  74
  75         values[0].gauge = snum;
  76         values[1].gauge = mnum;
  77         values[2].gauge = lnum;
  78
  79         vl.values = values;
  80         vl.values_len = STATIC_ARRAY_SIZE (values);
  81         vl.time = time (NULL);
  82         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
  83         sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
  84         sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
  85         sstrncpy (vl.type, "load", sizeof (vl.type));
  86
  87         plugin_dispatch_values (&vl);
  88 }
  89
  90 static void submit_gauge (const char *plugin_instance, const char *type,
  91                 const char *type_instance, gauge_t value)
  92
  93 {
  94         value_t values[1];
  95         value_list_t vl = VALUE_LIST_INIT;
  96
  97         values[0].gauge = value;
  98
  99         vl.values = values;
 100         vl.values_len = STATIC_ARRAY_SIZE (values);
 101         vl.time = time (NULL);
 102         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 103         sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
 104         sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
 105         sstrncpy (vl.type, type, sizeof (vl.type));
 106         sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 107
 108         plugin_dispatch_values (&vl);
 109 } /* void submit_gauge */
 110
 111 static inline long long __get_sock_bytes(const char *s)
 112 {
 113         while (s[0] != '/')
 114                 ++s;
 115
 116         /* Remove '/' */
 117         ++s;
 118         return atoll(s);
 119 }
 120
 121 static int vserver_read (void)
 122 {
 123         DIR                     *proc;
 124         struct dirent   *dent; /* 42 */
 125
 126         errno = 0;
 127         if (NULL == (proc = opendir (PROCDIR)))
 128         {
 129                 char errbuf[1024];
 130                 ERROR ("vserver plugin: fopen (%s): %s", PROCDIR,
 131                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 132                 return (-1);
 133         }
 134
 135         while (NULL != (dent = readdir (proc)))
 136         {
 137                 int  len;
 138                 char file[BUFSIZE];
 139
 140                 FILE *fh;
 141                 char buffer[BUFSIZE];
 142
 143                 char *cols[4];
 144
 145                 if (dent->d_name[0] == '.')
 146                         continue;
 147
 148                 /* This is not a directory */
 149                 if (dent->d_type != DT_DIR)
 150                         continue;
 151
 152                 /* socket message accounting */
 153                 len = ssnprintf (file, sizeof (file),
 154                                 PROCDIR "/%s/cacct", dent->d_name);
 155                 if ((len < 0) || (len >= sizeof (file)))
 156                         continue;
 157
 158                 if (NULL == (fh = fopen (file, "r")))
 159                 {
 160                         char errbuf[1024];
 161                         ERROR ("Cannot open '%s': %s", file,
 162                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 163                 }
 164
 165                 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
 166                 {
 167                         counter_t rx;
 168                         counter_t tx;
 169                         char *type_instance;
 170
 171                         if (strsplit (buffer, cols, 4) < 4)
 172                                 continue;
 173
 174                         if (0 == strcmp (cols[0], "UNIX:"))
 175                                 type_instance = "unix";
 176                         else if (0 == strcmp (cols[0], "INET:"))
 177                                 type_instance = "inet";
 178                         else if (0 == strcmp (cols[0], "INET6:"))
 179                                 type_instance = "inet6";
 180                         else if (0 == strcmp (cols[0], "OTHER:"))
 181                                 type_instance = "other";
 182                         else if (0 == strcmp (cols[0], "UNSPEC:"))
 183                                 type_instance = "unspec";
 184                         else
 185                                 continue;
 186
 187                         rx = __get_sock_bytes (cols[1]);
 188                         tx = __get_sock_bytes (cols[2]);
 189                         /* cols[3] == errors */
 190
 191                         traffic_submit (dent->d_name, type_instance, rx, tx);
 192                 } /* while (fgets) */
 193
 194                 if (fh != NULL)
 195                 {
 196                         fclose (fh);
 197                         fh = NULL;
 198                 }
 199
 200                 /* thread information and load */
 201                 len = ssnprintf (file, sizeof (file),
 202                                 PROCDIR "/%s/cvirt", dent->d_name);
 203                 if ((len < 0) || (len >= sizeof (file)))
 204                         continue;
 205
 206                 if (NULL == (fh = fopen (file, "r")))
 207                 {
 208                         char errbuf[1024];
 209                         ERROR ("Cannot open '%s': %s", file,
 210                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 211                 }
 212
 213                 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
 214                 {
 215                         int n = strsplit (buffer, cols, 4);
 216
 217                         if (2 == n)
 218                         {
 219                                 char   *type_instance;
 220                                 gauge_t value;
 221
 222                                 if (0 == strcmp (cols[0], "nr_threads:"))
 223                                         type_instance = "total";
 224                                 else if (0 == strcmp (cols[0], "nr_running:"))
 225                                         type_instance = "running";
 226                                 else if (0 == strcmp (cols[0], "nr_unintr:"))
 227                                         type_instance = "uninterruptable";
 228                                 else if (0 == strcmp (cols[0], "nr_onhold:"))
 229                                         type_instance = "onhold";
 230                                 else
 231                                         continue;
 232
 233                                 value = atof (cols[1]);
 234                                 submit_gauge (dent->d_name, "vs_threads", type_instance, value);
 235                         }
 236                         else if (4 == n) {
 237                                 if (0 == strcmp (cols[0], "loadavg:"))
 238                                 {
 239                                         gauge_t snum = atof (cols[1]);
 240                                         gauge_t mnum = atof (cols[2]);
 241                                         gauge_t lnum = atof (cols[3]);
 242                                         load_submit (dent->d_name, snum, mnum, lnum);
 243                                 }
 244                         }
 245                 } /* while (fgets) */
 246
 247                 if (fh != NULL)
 248                 {
 249                         fclose (fh);
 250                         fh = NULL;
 251                 }
 252
 253                 /* processes and memory usage */
 254                 len = ssnprintf (file, sizeof (file),
 255                                 PROCDIR "/%s/limit", dent->d_name);
 256                 if ((len < 0) || (len >= sizeof (file)))
 257                         continue;
 258
 259                 if (NULL == (fh = fopen (file, "r")))
 260                 {
 261                         char errbuf[1024];
 262                         ERROR ("Cannot open '%s': %s", file,
 263                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 264                 }
 265
 266                 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
 267                 {
 268                         char *type = "vs_memory";
 269                         char *type_instance;
 270                         gauge_t value;
 271
 272                         if (strsplit (buffer, cols, 2) < 2)
 273                                 continue;
 274
 275                         if (0 == strcmp (cols[0], "PROC:"))
 276                         {
 277                                 type = "vs_processes";
 278                                 type_instance = "";
 279                                 value = atof (cols[1]);
 280                         }
 281                         else
 282                         {
 283                                 if (0 == strcmp (cols[0], "VM:"))
 284                                         type_instance = "vm";
 285                                 else if (0 == strcmp (cols[0], "VML:"))
 286                                         type_instance = "vml";
 287                                 else if (0 == strcmp (cols[0], "RSS:"))
 288                                         type_instance = "rss";
 289                                 else if (0 == strcmp (cols[0], "ANON:"))
 290                                         type_instance = "anon";
 291                                 else
 292                                         continue;
 293
 294                                 value = atof (cols[1]) * pagesize;
 295                         }
 296
 297                         submit_gauge (dent->d_name, type, type_instance, value);
 298                 } /* while (fgets) */
 299
 300                 if (fh != NULL)
 301                 {
 302                         fclose (fh);
 303                         fh = NULL;
 304                 }
 305         } /* while (readdir) */
 306
 307         closedir (proc);
 308
 309         return (0);
 310 } /* int vserver_read */
 311
 312 void module_register (void)
 313 {
 314         plugin_register_init ("vserver", vserver_init);
 315         plugin_register_read ("vserver", vserver_read);
 316 } /* void module_register(void) */
 317
 318 /* vim: set ts=4 sw=4 noexpandtab : */