plugins/check_mysql.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_mysql plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)
   7 * Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
   8 * Copyright (c) 1999-2007 Nagios Plugins Development Team
   9 *
  10 * Last Modified: $Date$
  11 *
  12 * Description:
  13 *
  14 * This file contains the check_mysql plugin
  15 *
  16 * This program tests connections to a mysql server
  17 *
  18 *
  19 * This program is free software: you can redistribute it and/or modify
  20 * it under the terms of the GNU General Public License as published by
  21 * the Free Software Foundation, either version 3 of the License, or
  22 * (at your option) any later version.
  23 *
  24 * This program is distributed in the hope that it will be useful,
  25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27 * GNU General Public License for more details.
  28 *
  29 * You should have received a copy of the GNU General Public License
  30 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  31 *
  32 * $Id$
  33 *
  34 *****************************************************************************/
  35
  36 const char *progname = "check_mysql";
  37 const char *revision = "$Revision$";
  38 const char *copyright = "1999-2007";
  39 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  40
  41 #define SLAVERESULTSIZE 70
  42
  43 #include "common.h"
  44 #include "utils.h"
  45 #include "utils_base.h"
  46 #include "netutils.h"
  47
  48 #include <mysql.h>
  49 #include <errmsg.h>
  50
  51 char *db_user = NULL;
  52 char *db_host = NULL;
  53 char *db_socket = NULL;
  54 char *db_pass = NULL;
  55 char *db = NULL;
  56 unsigned int db_port = MYSQL_PORT;
  57 int check_slave = 0, warn_sec = 0, crit_sec = 0;
  58 int verbose = 0;
  59
  60 thresholds *my_threshold = NULL;
  61
  62 int process_arguments (int, char **);
  63 int validate_arguments (void);
  64 void print_help (void);
  65 void print_usage (void);
  66
  67 int
  68 main (int argc, char **argv)
  69 {
  70
  71         MYSQL mysql;
  72         MYSQL_RES *res;
  73         MYSQL_ROW row;
  74
  75         /* should be status */
  76
  77         char *result = NULL;
  78         char *error = NULL;
  79         char slaveresult[SLAVERESULTSIZE];
  80
  81         setlocale (LC_ALL, "");
  82         bindtextdomain (PACKAGE, LOCALEDIR);
  83         textdomain (PACKAGE);
  84
  85         /* Parse extra opts if any */
  86         argv=np_extra_opts (&argc, argv, progname);
  87
  88         if (process_arguments (argc, argv) == ERROR)
  89                 usage4 (_("Could not parse arguments"));
  90
  91         /* initialize mysql  */
  92         mysql_init (&mysql);
  93
  94         mysql_options(&mysql,MYSQL_READ_DEFAULT_GROUP,"client");
  95
  96         /* establish a connection to the server and error checking */
  97         if (!mysql_real_connect(&mysql,db_host,db_user,db_pass,db,db_port,db_socket,0)) {
  98                 if (mysql_errno (&mysql) == CR_UNKNOWN_HOST)
  99                         die (STATE_WARNING, "%s\n", mysql_error (&mysql));
 100                 else if (mysql_errno (&mysql) == CR_VERSION_ERROR)
 101                         die (STATE_WARNING, "%s\n", mysql_error (&mysql));
 102                 else if (mysql_errno (&mysql) == CR_OUT_OF_MEMORY)
 103                         die (STATE_WARNING, "%s\n", mysql_error (&mysql));
 104                 else if (mysql_errno (&mysql) == CR_IPSOCK_ERROR)
 105                         die (STATE_WARNING, "%s\n", mysql_error (&mysql));
 106                 else if (mysql_errno (&mysql) == CR_SOCKET_CREATE_ERROR)
 107                         die (STATE_WARNING, "%s\n", mysql_error (&mysql));
 108                 else
 109                         die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
 110         }
 111
 112         /* get the server stats */
 113         result = strdup (mysql_stat (&mysql));
 114
 115         /* error checking once more */
 116         if (mysql_error (&mysql)) {
 117                 if (mysql_errno (&mysql) == CR_SERVER_GONE_ERROR)
 118                         die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
 119                 else if (mysql_errno (&mysql) == CR_SERVER_LOST)
 120                         die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
 121                 else if (mysql_errno (&mysql) == CR_UNKNOWN_ERROR)
 122                         die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
 123         }
 124
 125         if(check_slave) {
 126                 /* check the slave status */
 127                 if (mysql_query (&mysql, "show slave status") != 0) {
 128                         error = strdup(mysql_error(&mysql));
 129                         mysql_close (&mysql);
 130                         die (STATE_CRITICAL, _("slave query error: %s\n"), error);
 131                 }
 132
 133                 /* store the result */
 134                 if ( (res = mysql_store_result (&mysql)) == NULL) {
 135                         error = strdup(mysql_error(&mysql));
 136                         mysql_close (&mysql);
 137                         die (STATE_CRITICAL, _("slave store_result error: %s\n"), error);
 138                 }
 139
 140                 /* Check there is some data */
 141                 if (mysql_num_rows(res) == 0) {
 142                         mysql_close(&mysql);
 143                         die (STATE_WARNING, "%s\n", _("No slaves defined"));
 144                 }
 145
 146                 /* fetch the first row */
 147                 if ( (row = mysql_fetch_row (res)) == NULL) {
 148                         error = strdup(mysql_error(&mysql));
 149                         mysql_free_result (res);
 150                         mysql_close (&mysql);
 151                         die (STATE_CRITICAL, _("slave fetch row error: %s\n"), error);
 152                 }
 153
 154                 if (mysql_field_count (&mysql) == 12) {
 155                         /* mysql 3.23.x */
 156                         snprintf (slaveresult, SLAVERESULTSIZE, _("Slave running: %s"), row[6]);
 157                         if (strcmp (row[6], "Yes") != 0) {
 158                                 mysql_free_result (res);
 159                                 mysql_close (&mysql);
 160                                 die (STATE_CRITICAL, "%s\n", slaveresult);
 161                         }
 162
 163                 } else {
 164                         /* mysql 4.x.x */
 165                         int slave_io_field = -1 , slave_sql_field = -1, seconds_behind_field = -1, i, num_fields;
 166                         MYSQL_FIELD* fields;
 167
 168                         num_fields = mysql_num_fields(res);
 169                         fields = mysql_fetch_fields(res);
 170                         for(i = 0; i < num_fields; i++) {
 171                                 if (strcmp(fields[i].name, "Slave_IO_Running") == 0) {
 172                                         slave_io_field = i;
 173                                         continue;
 174                                 }
 175                                 if (strcmp(fields[i].name, "Slave_SQL_Running") == 0) {
 176                                         slave_sql_field = i;
 177                                         continue;
 178                                 }
 179                                 if (strcmp(fields[i].name, "Seconds_Behind_Master") == 0) {
 180                                         seconds_behind_field = i;
 181                                         continue;
 182                                 }
 183                         }
 184                         if ((slave_io_field < 0) || (slave_sql_field < 0) || (num_fields == 0)) {
 185                                 mysql_free_result (res);
 186                                 mysql_close (&mysql);
 187                                 die (STATE_CRITICAL, "Slave status unavailable\n");
 188                         }
 189
 190                         snprintf (slaveresult, SLAVERESULTSIZE, "Slave IO: %s Slave SQL: %s Seconds Behind Master: %s", row[slave_io_field], row[slave_sql_field], row[seconds_behind_field]);
 191                         if (strcmp (row[slave_io_field], "Yes") != 0 || strcmp (row[slave_sql_field], "Yes") != 0) {
 192                                 mysql_free_result (res);
 193                                 mysql_close (&mysql);
 194                                 die (STATE_CRITICAL, "%s\n", slaveresult);
 195                         }
 196
 197                         if (verbose >=3) {
 198                                 if (seconds_behind_field == -1) {
 199                                         printf("seconds_behind_field not found\n");
 200                                 } else {
 201                                         printf ("seconds_behind_field(index %d)=%s\n", seconds_behind_field, row[seconds_behind_field]);
 202                                 }
 203                         }
 204
 205                         if ((seconds_behind_field != -1) && (strcmp (row[seconds_behind_field], "NULL") != 0)) {
 206                                 double value = atof(row[seconds_behind_field]);
 207                                 int status;
 208
 209                                 status = get_status(value, my_threshold);
 210
 211                                 if (status == STATE_WARNING) {
 212                                         printf("SLOW_SLAVE %s: %s\n", _("WARNING"), slaveresult);
 213                                         exit(STATE_WARNING);
 214                                 } else if (status == STATE_CRITICAL) {
 215                                         printf("SLOW_SLAVE %s: %s\n", _("CRITICAL"), slaveresult);
 216                                         exit(STATE_CRITICAL);
 217                                 }
 218                         }
 219                 }
 220
 221                 /* free the result */
 222                 mysql_free_result (res);
 223         }
 224
 225         /* close the connection */
 226         mysql_close (&mysql);
 227
 228         /* print out the result of stats */
 229         if (check_slave) {
 230                 printf ("%s %s\n", result, slaveresult);
 231         } else {
 232                 printf ("%s\n", result);
 233         }
 234
 235         return STATE_OK;
 236 }
 237
 238
 239 /* process command-line arguments */
 240 int
 241 process_arguments (int argc, char **argv)
 242 {
 243         int c;
 244         char *warning = NULL;
 245         char *critical = NULL;
 246
 247         int option = 0;
 248         static struct option longopts[] = {
 249                 {"hostname", required_argument, 0, 'H'},
 250                 {"socket", required_argument, 0, 's'},
 251                 {"database", required_argument, 0, 'd'},
 252                 {"username", required_argument, 0, 'u'},
 253                 {"password", required_argument, 0, 'p'},
 254                 {"port", required_argument, 0, 'P'},
 255                 {"critical", required_argument, 0, 'c'},
 256                 {"warning", required_argument, 0, 'w'},
 257                 {"check-slave", no_argument, 0, 'S'},
 258                 {"verbose", no_argument, 0, 'v'},
 259                 {"version", no_argument, 0, 'V'},
 260                 {"help", no_argument, 0, 'h'},
 261                 {0, 0, 0, 0}
 262         };
 263
 264         if (argc < 1)
 265                 return ERROR;
 266
 267         while (1) {
 268                 c = getopt_long (argc, argv, "hvVSP:p:u:d:H:s:c:w:", longopts, &option);
 269
 270                 if (c == -1 || c == EOF)
 271                         break;
 272
 273                 switch (c) {
 274                 case 'H':                                                                       /* hostname */
 275                         if (is_host (optarg)) {
 276                                 db_host = optarg;
 277                         }
 278                         else {
 279                                 usage2 (_("Invalid hostname/address"), optarg);
 280                         }
 281                         break;
 282                 case 's':                                                                       /* socket */
 283                         db_socket = optarg;
 284                         break;
 285                 case 'd':                                                                       /* database */
 286                         db = optarg;
 287                         break;
 288                 case 'u':                                                                       /* username */
 289                         db_user = optarg;
 290                         break;
 291                 case 'p':                                                                       /* authentication information: password */
 292                         db_pass = strdup(optarg);
 293
 294                         /* Delete the password from process list */
 295                         while (*optarg != '\0') {
 296                                 *optarg = 'X';
 297                                 optarg++;
 298                         }
 299                         break;
 300                 case 'P':                                                                       /* critical time threshold */
 301                         db_port = atoi (optarg);
 302                         break;
 303                 case 'S':
 304                         check_slave = 1;                                                        /* check-slave */
 305                         break;
 306                 case 'w':
 307                         warning = optarg;
 308                         break;
 309                 case 'c':
 310                         critical = optarg;
 311                         break;
 312                 case 'V':                                                                       /* version */
 313                         print_revision (progname, revision);
 314                         exit (STATE_OK);
 315                 case 'h':                                                                       /* help */
 316                         print_help ();
 317                         exit (STATE_OK);
 318                 case 'v':
 319                         verbose++;
 320                         break;
 321                 case '?':                                                                       /* help */
 322                         usage5 ();
 323                 }
 324         }
 325
 326         c = optind;
 327
 328         set_thresholds(&my_threshold, warning, critical);
 329
 330         while ( argc > c ) {
 331
 332                 if (db_host == NULL)
 333                         if (is_host (argv[c])) {
 334                                 db_host = argv[c++];
 335                         }
 336                         else {
 337                                 usage2 (_("Invalid hostname/address"), argv[c]);
 338                         }
 339                 else if (db_user == NULL)
 340                         db_user = argv[c++];
 341                 else if (db_pass == NULL)
 342                         db_pass = argv[c++];
 343                 else if (db == NULL)
 344                         db = argv[c++];
 345                 else if (is_intnonneg (argv[c]))
 346                         db_port = atoi (argv[c++]);
 347                 else
 348                         break;
 349         }
 350
 351         return validate_arguments ();
 352 }
 353
 354
 355 int
 356 validate_arguments (void)
 357 {
 358         if (db_user == NULL)
 359                 db_user = strdup("");
 360
 361         if (db_host == NULL)
 362                 db_host = strdup("");
 363
 364         if (db_pass == NULL)
 365                 db_pass == strdup("");
 366
 367         if (db == NULL)
 368                 db = strdup("");
 369
 370         return OK;
 371 }
 372
 373
 374 void
 375 print_help (void)
 376 {
 377         char *myport;
 378         asprintf (&myport, "%d", MYSQL_PORT);
 379
 380         print_revision (progname, revision);
 381
 382         printf (_(COPYRIGHT), copyright, email);
 383
 384         printf ("%s\n", _("This program tests connections to a mysql server"));
 385
 386   printf ("\n\n");
 387
 388         print_usage ();
 389
 390   printf (_(UT_HELP_VRSN));
 391         printf (_(UT_EXTRA_OPTS));
 392
 393   printf (_(UT_HOST_PORT), 'P', myport);
 394   printf (" %s\n", "-s, --socket=STRING");
 395   printf ("    %s\n", _("Use the specified socket (has no effect if -H is used)"));
 396
 397   printf (" %s\n", "-d, --database=STRING");
 398   printf ("    %s\n", _("Check database with indicated name"));
 399   printf (" %s\n", "-u, --username=STRING");
 400   printf ("    %s\n", _("Connect using the indicated username"));
 401   printf (" %s\n", "-p, --password=STRING");
 402   printf ("    %s\n", _("Use the indicated password to authenticate the connection"));
 403   printf ("    ==> %s <==\n", _("IMPORTANT: THIS FORM OF AUTHENTICATION IS NOT SECURE!!!"));
 404   printf ("    %s\n", _("Your clear-text password could be visible as a process table entry"));
 405   printf (" %s\n", "-S, --check-slave");
 406   printf ("    %s\n", _("Check if the slave thread is running properly."));
 407   printf (" %s\n", "-w, --warning");
 408   printf ("    %s\n", _("Exit with WARNING status if slave server is more than INTEGER seconds"));
 409   printf ("    %s\n", _("behind master"));
 410   printf (" %s\n", "-c, --critical");
 411   printf ("    %s\n", _("Exit with CRITICAL status if slave server is more then INTEGER seconds"));
 412   printf ("    %s\n", _("behind master"));
 413
 414   printf ("\n");
 415   printf (" %s\n", _("There are no required arguments. By default, the local database is checked"));
 416   printf (" %s\n", _("using the default unix socket. You can force TCP on localhost by using an"));
 417   printf (" %s\n", _("IP address or FQDN ('localhost' will use the socket as well)."));
 418
 419 #ifdef NP_EXTRA_OPTS
 420         printf ("\n");
 421         printf ("%s\n", _("Notes:"));
 422         printf (_(UT_EXTRA_OPTS_NOTES));
 423 #endif
 424
 425         printf (_(UT_SUPPORT));
 426 }
 427
 428
 429 void
 430 print_usage (void)
 431 {
 432         printf (_("Usage:"));
 433   printf (" %s [-d database] [-H host] [-P port] [-s socket]\n",progname);
 434   printf ("       [-u user] [-p password] [-S]\n");
 435 }