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pkg-monitoring-plugins/plugins/check_mysql.c

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/*****************************************************************************
*
* Monitoring check_mysql plugin
*
* License: GPL
* Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)
* Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
* Copyright (c) 1999-2011 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the check_mysql plugin
*
* This program tests connections to a mysql server
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
*****************************************************************************/
const char *progname = "check_mysql";
const char *copyright = "1999-2011";
const char *email = "devel@monitoring-plugins.org";
#define SLAVERESULTSIZE 96
#include "common.h"
#include "utils.h"
#include "utils_base.h"
#include "netutils.h"
#include <mysql.h>
#include <mysqld_error.h>
#include <errmsg.h>
char *db_user = NULL;
char *db_host = NULL;
char *db_socket = NULL;
char *db_pass = NULL;
char *db = NULL;
char *ca_cert = NULL;
char *ca_dir = NULL;
char *cert = NULL;
char *key = NULL;
char *ciphers = NULL;
bool ssl = false;
char *opt_file = NULL;
char *opt_group = NULL;
unsigned int db_port = MYSQL_PORT;
int check_slave = 0, warn_sec = 0, crit_sec = 0;
int ignore_auth = 0;
int verbose = 0;
static double warning_time = 0;
static double critical_time = 0;
#define LENGTH_METRIC_UNIT 6
static const char *metric_unit[LENGTH_METRIC_UNIT] = {
"Open_files",
"Open_tables",
"Qcache_free_memory",
"Qcache_queries_in_cache",
"Threads_connected",
"Threads_running"
};
#define LENGTH_METRIC_COUNTER 9
static const char *metric_counter[LENGTH_METRIC_COUNTER] = {
"Connections",
"Qcache_hits",
"Qcache_inserts",
"Qcache_lowmem_prunes",
"Qcache_not_cached",
"Queries",
"Questions",
"Table_locks_waited",
"Uptime"
};
#define MYSQLDUMP_THREADS_QUERY "SELECT COUNT(1) mysqldumpThreads FROM information_schema.processlist WHERE info LIKE 'SELECT /*!40001 SQL_NO_CACHE */%'"
thresholds *my_threshold = NULL;
int process_arguments (int, char **);
int validate_arguments (void);
void print_help (void);
void print_usage (void);
int
main (int argc, char **argv)
{
MYSQL mysql;
MYSQL_RES *res;
MYSQL_ROW row;
/* should be status */
char *result = NULL;
char *error = NULL;
char slaveresult[SLAVERESULTSIZE] = { 0 };
char* perf;
perf = strdup ("");
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
/* initialize mysql */
mysql_init (&mysql);
if (opt_file != NULL)
mysql_options(&mysql,MYSQL_READ_DEFAULT_FILE,opt_file);
if (opt_group != NULL)
mysql_options(&mysql,MYSQL_READ_DEFAULT_GROUP,opt_group);
else
mysql_options(&mysql,MYSQL_READ_DEFAULT_GROUP,"client");
if (ssl)
mysql_ssl_set(&mysql,key,cert,ca_cert,ca_dir,ciphers);
/* establish a connection to the server and error checking */
if (!mysql_real_connect(&mysql,db_host,db_user,db_pass,db,db_port,db_socket,0)) {
/* Depending on internally-selected auth plugin MySQL might return */
/* ER_ACCESS_DENIED_NO_PASSWORD_ERROR or ER_ACCESS_DENIED_ERROR. */
/* Semantically these errors are the same. */
if (ignore_auth && (mysql_errno (&mysql) == ER_ACCESS_DENIED_ERROR || mysql_errno (&mysql) == ER_ACCESS_DENIED_NO_PASSWORD_ERROR))
{
printf("MySQL OK - Version: %s (protocol %d)\n",
mysql_get_server_info(&mysql),
mysql_get_proto_info(&mysql)
);
mysql_close (&mysql);
return STATE_OK;
}
else if (mysql_errno (&mysql) == CR_UNKNOWN_HOST)
die (STATE_WARNING, "%s\n", mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_VERSION_ERROR)
die (STATE_WARNING, "%s\n", mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_OUT_OF_MEMORY)
die (STATE_WARNING, "%s\n", mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_IPSOCK_ERROR)
die (STATE_WARNING, "%s\n", mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_SOCKET_CREATE_ERROR)
die (STATE_WARNING, "%s\n", mysql_error (&mysql));
else
die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
}
/* get the server stats */
result = strdup (mysql_stat (&mysql));
/* error checking once more */
if (mysql_error (&mysql)) {
if (mysql_errno (&mysql) == CR_SERVER_GONE_ERROR)
die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_SERVER_LOST)
die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_UNKNOWN_ERROR)
die (STATE_CRITICAL, "%s\n", mysql_error (&mysql));
}
/* try to fetch some perf data */
if (mysql_query (&mysql, "show global status") == 0) {
if ( (res = mysql_store_result (&mysql)) == NULL) {
error = strdup(mysql_error(&mysql));
mysql_close (&mysql);
die (STATE_CRITICAL, _("status store_result error: %s\n"), error);
}
while ( (row = mysql_fetch_row (res)) != NULL) {
int i;
for(i = 0; i < LENGTH_METRIC_UNIT; i++) {
if (strcmp(row[0], metric_unit[i]) == 0) {
xasprintf(&perf, "%s%s ", perf, perfdata(metric_unit[i],
atol(row[1]), "", false, 0, false, 0, false, 0, false, 0));
continue;
}
}
for(i = 0; i < LENGTH_METRIC_COUNTER; i++) {
if (strcmp(row[0], metric_counter[i]) == 0) {
xasprintf(&perf, "%s%s ", perf, perfdata(metric_counter[i],
atol(row[1]), "c", false, 0, false, 0, false, 0, false, 0));
continue;
}
}
}
/* remove trailing space */
if (strlen(perf) > 0)
perf[strlen(perf) - 1] = '\0';
}
if(check_slave) {
/* check the slave status */
if (mysql_query (&mysql, "show slave status") != 0) {
error = strdup(mysql_error(&mysql));
mysql_close (&mysql);
die (STATE_CRITICAL, _("slave query error: %s\n"), error);
}
/* store the result */
if ( (res = mysql_store_result (&mysql)) == NULL) {
error = strdup(mysql_error(&mysql));
mysql_close (&mysql);
die (STATE_CRITICAL, _("slave store_result error: %s\n"), error);
}
/* Check there is some data */
if (mysql_num_rows(res) == 0) {
mysql_close(&mysql);
die (STATE_WARNING, "%s\n", _("No slaves defined"));
}
/* fetch the first row */
if ( (row = mysql_fetch_row (res)) == NULL) {
error = strdup(mysql_error(&mysql));
mysql_free_result (res);
mysql_close (&mysql);
die (STATE_CRITICAL, _("slave fetch row error: %s\n"), error);
}
if (mysql_field_count (&mysql) == 12) {
/* mysql 3.23.x */
snprintf (slaveresult, SLAVERESULTSIZE, _("Slave running: %s"), row[6]);
if (strcmp (row[6], "Yes") != 0) {
mysql_free_result (res);
mysql_close (&mysql);
die (STATE_CRITICAL, "%s\n", slaveresult);
}
} else {
/* mysql 4.x.x and mysql 5.x.x */
int slave_io_field = -1 , slave_sql_field = -1, seconds_behind_field = -1, i, num_fields;
MYSQL_FIELD* fields;
num_fields = mysql_num_fields(res);
fields = mysql_fetch_fields(res);
for(i = 0; i < num_fields; i++) {
if (strcmp(fields[i].name, "Slave_IO_Running") == 0) {
slave_io_field = i;
continue;
}
if (strcmp(fields[i].name, "Slave_SQL_Running") == 0) {
slave_sql_field = i;
continue;
}
if (strcmp(fields[i].name, "Seconds_Behind_Master") == 0) {
seconds_behind_field = i;
continue;
}
}
/* Check if slave status is available */
if ((slave_io_field < 0) || (slave_sql_field < 0) || (num_fields == 0)) {
mysql_free_result (res);
mysql_close (&mysql);
die (STATE_CRITICAL, "Slave status unavailable\n");
}
/* Save slave status in slaveresult */
snprintf (slaveresult, SLAVERESULTSIZE, "Slave IO: %s Slave SQL: %s Seconds Behind Master: %s", row[slave_io_field], row[slave_sql_field], seconds_behind_field!=-1?row[seconds_behind_field]:"Unknown");
/* Raise critical error if SQL THREAD or IO THREAD are stopped, but only if there are no mysqldump threads running */
if (strcmp (row[slave_io_field], "Yes") != 0 || strcmp (row[slave_sql_field], "Yes") != 0) {
MYSQL_RES *res_mysqldump;
MYSQL_ROW row_mysqldump;
unsigned int mysqldump_threads = 0;
if (mysql_query (&mysql, MYSQLDUMP_THREADS_QUERY) == 0) {
/* store the result */
if ( (res_mysqldump = mysql_store_result (&mysql)) != NULL) {
if (mysql_num_rows(res_mysqldump) == 1) {
if ( (row_mysqldump = mysql_fetch_row (res_mysqldump)) != NULL) {
mysqldump_threads = atoi(row_mysqldump[0]);
}
}
/* free the result */
mysql_free_result (res_mysqldump);
}
mysql_close (&mysql);
}
if (mysqldump_threads == 0) {
die (STATE_CRITICAL, "%s\n", slaveresult);
} else {
strncat(slaveresult, " Mysqldump: in progress", SLAVERESULTSIZE-1);
}
}
if (verbose >=3) {
if (seconds_behind_field == -1) {
printf("seconds_behind_field not found\n");
} else {
printf ("seconds_behind_field(index %d)=%s\n", seconds_behind_field, row[seconds_behind_field]);
}
}
/* Check Seconds Behind against threshold */
if ((seconds_behind_field != -1) && (row[seconds_behind_field] != NULL && strcmp (row[seconds_behind_field], "NULL") != 0)) {
double value = atof(row[seconds_behind_field]);
int status;
status = get_status(value, my_threshold);
xasprintf (&perf, "%s %s", perf, fperfdata ("seconds behind master", value, "s",
true, (double) warning_time,
true, (double) critical_time,
false, 0,
false, 0));
if (status == STATE_WARNING) {
printf("SLOW_SLAVE %s: %s|%s\n", _("WARNING"), slaveresult, perf);
exit(STATE_WARNING);
} else if (status == STATE_CRITICAL) {
printf("SLOW_SLAVE %s: %s|%s\n", _("CRITICAL"), slaveresult, perf);
exit(STATE_CRITICAL);
}
}
}
/* free the result */
mysql_free_result (res);
}
/* close the connection */
mysql_close (&mysql);
/* print out the result of stats */
if (check_slave) {
printf ("%s %s|%s\n", result, slaveresult, perf);
} else {
printf ("%s|%s\n", result, perf);
}
return STATE_OK;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
char *warning = NULL;
char *critical = NULL;
int option = 0;
static struct option longopts[] = {
{"hostname", required_argument, 0, 'H'},
{"socket", required_argument, 0, 's'},
{"database", required_argument, 0, 'd'},
{"username", required_argument, 0, 'u'},
{"password", required_argument, 0, 'p'},
{"file", required_argument, 0, 'f'},
{"group", required_argument, 0, 'g'},
{"port", required_argument, 0, 'P'},
{"critical", required_argument, 0, 'c'},
{"warning", required_argument, 0, 'w'},
{"check-slave", no_argument, 0, 'S'},
{"ignore-auth", no_argument, 0, 'n'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
{"ssl", no_argument, 0, 'l'},
{"ca-cert", optional_argument, 0, 'C'},
{"key", required_argument,0,'k'},
{"cert", required_argument,0,'a'},
{"ca-dir", required_argument, 0, 'D'},
{"ciphers", required_argument, 0, 'L'},
{0, 0, 0, 0}
};
if (argc < 1)
return ERROR;
while (1) {
c = getopt_long (argc, argv, "hlvVnSP:p:u:d:H:s:c:w:a:k:C:D:L:f:g:", longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case 'H': /* hostname */
if (is_host (optarg)) {
db_host = optarg;
}
else if (*optarg == '/') {
db_socket = optarg;
}
else {
usage2 (_("Invalid hostname/address"), optarg);
}
break;
case 's': /* socket */
db_socket = optarg;
break;
case 'd': /* database */
db = optarg;
break;
case 'l':
ssl = true;
break;
case 'C':
ca_cert = optarg;
break;
case 'a':
cert = optarg;
break;
case 'k':
key = optarg;
break;
case 'D':
ca_dir = optarg;
break;
case 'L':
ciphers = optarg;
break;
case 'u': /* username */
db_user = optarg;
break;
case 'p': /* authentication information: password */
db_pass = strdup(optarg);
/* Delete the password from process list */
while (*optarg != '\0') {
*optarg = 'X';
optarg++;
}
break;
case 'f': /* client options file */
opt_file = optarg;
break;
case 'g': /* client options group */
opt_group = optarg;
break;
case 'P': /* critical time threshold */
db_port = atoi (optarg);
break;
case 'S':
check_slave = 1; /* check-slave */
break;
case 'n':
ignore_auth = 1; /* ignore-auth */
break;
case 'w':
warning = optarg;
warning_time = strtod (warning, NULL);
break;
case 'c':
critical = optarg;
critical_time = strtod (critical, NULL);
break;
case 'V': /* version */
print_revision (progname, NP_VERSION);
exit (STATE_UNKNOWN);
case 'h': /* help */
print_help ();
exit (STATE_UNKNOWN);
case 'v':
verbose++;
break;
case '?': /* help */
usage5 ();
}
}
c = optind;
set_thresholds(&my_threshold, warning, critical);
while ( argc > c ) {
if (db_host == NULL)
if (is_host (argv[c])) {
db_host = argv[c++];
}
else {
usage2 (_("Invalid hostname/address"), argv[c]);
}
else if (db_user == NULL)
db_user = argv[c++];
else if (db_pass == NULL)
db_pass = argv[c++];
else if (db == NULL)
db = argv[c++];
else if (is_intnonneg (argv[c]))
db_port = atoi (argv[c++]);
else
break;
}
return validate_arguments ();
}
int
validate_arguments (void)
{
if (db_user == NULL)
db_user = strdup("");
if (db_host == NULL)
db_host = strdup("");
if (db == NULL)
db = strdup("");
return OK;
}
void
print_help (void)
{
char *myport;
xasprintf (&myport, "%d", MYSQL_PORT);
print_revision (progname, NP_VERSION);
printf (_(COPYRIGHT), copyright, email);
printf ("%s\n", _("This program tests connections to a MySQL server"));
printf ("\n\n");
print_usage ();
printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
printf (UT_HOST_PORT, 'P', myport);
printf (" %s\n", "-n, --ignore-auth");
printf (" %s\n", _("Ignore authentication failure and check for mysql connectivity only"));
printf (" %s\n", "-s, --socket=STRING");
printf (" %s\n", _("Use the specified socket (has no effect if -H is used)"));
printf (" %s\n", "-d, --database=STRING");
printf (" %s\n", _("Check database with indicated name"));
printf (" %s\n", "-f, --file=STRING");
printf (" %s\n", _("Read from the specified client options file"));
printf (" %s\n", "-g, --group=STRING");
printf (" %s\n", _("Use a client options group"));
printf (" %s\n", "-u, --username=STRING");
printf (" %s\n", _("Connect using the indicated username"));
printf (" %s\n", "-p, --password=STRING");
printf (" %s\n", _("Use the indicated password to authenticate the connection"));
printf (" ==> %s <==\n", _("IMPORTANT: THIS FORM OF AUTHENTICATION IS NOT SECURE!!!"));
printf (" %s\n", _("Your clear-text password could be visible as a process table entry"));
printf (" %s\n", "-S, --check-slave");
printf (" %s\n", _("Check if the slave thread is running properly."));
printf (" %s\n", "-w, --warning");
printf (" %s\n", _("Exit with WARNING status if slave server is more than INTEGER seconds"));
printf (" %s\n", _("behind master"));
printf (" %s\n", "-c, --critical");
printf (" %s\n", _("Exit with CRITICAL status if slave server is more then INTEGER seconds"));
printf (" %s\n", _("behind master"));
printf (" %s\n", "-l, --ssl");
printf (" %s\n", _("Use ssl encryption"));
printf (" %s\n", "-C, --ca-cert=STRING");
printf (" %s\n", _("Path to CA signing the cert"));
printf (" %s\n", "-a, --cert=STRING");
printf (" %s\n", _("Path to SSL certificate"));
printf (" %s\n", "-k, --key=STRING");
printf (" %s\n", _("Path to private SSL key"));
printf (" %s\n", "-D, --ca-dir=STRING");
printf (" %s\n", _("Path to CA directory"));
printf (" %s\n", "-L, --ciphers=STRING");
printf (" %s\n", _("List of valid SSL ciphers"));
printf ("\n");
printf (" %s\n", _("There are no required arguments. By default, the local database is checked"));
printf (" %s\n", _("using the default unix socket. You can force TCP on localhost by using an"));
printf (" %s\n", _("IP address or FQDN ('localhost' will use the socket as well)."));
printf ("\n");
printf ("%s\n", _("Notes:"));
printf (" %s\n", _("You must specify -p with an empty string to force an empty password,"));
printf (" %s\n", _("overriding any my.cnf settings."));
printf (UT_SUPPORT);
}
void
print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf (" %s [-d database] [-H host] [-P port] [-s socket]\n",progname);
printf (" [-u user] [-p password] [-S] [-l] [-a cert] [-k key]\n");
printf (" [-C ca-cert] [-D ca-dir] [-L ciphers] [-f optfile] [-g group]\n");
}
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