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-rw-r--r--plugins/check_pgsql.c234
1 files changed, 202 insertions, 32 deletions
diff --git a/plugins/check_pgsql.c b/plugins/check_pgsql.c
index 8b0769f1..c109955a 100644
--- a/plugins/check_pgsql.c
+++ b/plugins/check_pgsql.c
@@ -3,7 +3,7 @@
* Nagios check_pgsql plugin
*
* License: GPL
-* Copyright (c) 1999-2007 Nagios Plugins Development Team
+* Copyright (c) 1999-2011 Nagios Plugins Development Team
*
* Description:
*
@@ -29,7 +29,7 @@
*****************************************************************************/
const char *progname = "check_pgsql";
-const char *copyright = "1999-2007";
+const char *copyright = "1999-2011";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
@@ -42,6 +42,20 @@ const char *email = "nagiosplug-devel@lists.sourceforge.net";
#define DEFAULT_DB "template1"
#define DEFAULT_HOST "127.0.0.1"
+/* return the PSQL server version as a 3-tuple */
+#define PSQL_SERVER_VERSION3(server_version) \
+ (server_version) / 10000, \
+ (server_version) / 100 - (int)((server_version) / 10000) * 100, \
+ (server_version) - (int)((server_version) / 100) * 100
+/* return true if the given host is a UNIX domain socket */
+#define PSQL_IS_UNIX_DOMAIN_SOCKET(host) \
+ ((NULL == (host)) || ('\0' == *(host)) || ('/' == *(host)))
+/* return a 3-tuple identifying a host/port independent of the socket type */
+#define PSQL_SOCKET3(host, port) \
+ ((NULL == (host)) || ('\0' == *(host))) ? DEFAULT_PGSOCKET_DIR : host, \
+ PSQL_IS_UNIX_DOMAIN_SOCKET (host) ? "/.s.PGSQL." : ":", \
+ port
+
enum {
DEFAULT_PORT = 5432,
DEFAULT_WARN = 2,
@@ -56,6 +70,7 @@ void print_usage (void);
void print_help (void);
int is_pg_dbname (char *);
int is_pg_logname (char *);
+int do_query (PGconn *, char *);
char *pghost = NULL; /* host name of the backend server */
char *pgport = NULL; /* port of the backend server */
@@ -65,14 +80,15 @@ char *pgtty = NULL;
char dbName[NAMEDATALEN] = DEFAULT_DB;
char *pguser = NULL;
char *pgpasswd = NULL;
+char *pgparams = NULL;
double twarn = (double)DEFAULT_WARN;
double tcrit = (double)DEFAULT_CRIT;
+char *pgquery = NULL;
+char *query_warning = NULL;
+char *query_critical = NULL;
+thresholds *qthresholds = NULL;
int verbose = 0;
-PGconn *conn;
-/*PGresult *res;*/
-
-
/******************************************************************************
The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
@@ -115,10 +131,6 @@ Please note that all tags must be lowercase to use the DocBook XML DTD.
<sect2>
<title>Future Enhancements</title>
<para>ToDo List</para>
-<itemizedlist>
-<listitem>Add option to get password from a secured file rather than the command line</listitem>
-<listitem>Add option to specify the query to execute</listitem>
-</itemizedlist>
</sect2>
@@ -132,8 +144,14 @@ Please note that all tags must be lowercase to use the DocBook XML DTD.
int
main (int argc, char **argv)
{
- int elapsed_time;
+ PGconn *conn;
+ char *conninfo = NULL;
+
+ struct timeval start_timeval;
+ struct timeval end_timeval;
+ double elapsed_time;
int status = STATE_UNKNOWN;
+ int query_status = STATE_UNKNOWN;
/* begin, by setting the parameters for a backend connection if the
* parameters are null, then the system will try to use reasonable
@@ -161,20 +179,41 @@ main (int argc, char **argv)
}
alarm (timeout_interval);
- if (verbose)
- printf("Connecting to database:\n DB: %s\n User: %s\n Host: %s\n Port: %d\n", dbName,
- (pguser != NULL) ? pguser : "unspecified",
- (pghost != NULL) ? pghost : "unspecified",
- (pgport != NULL) ? atoi(pgport) : DEFAULT_PORT);
+ if (pgparams)
+ asprintf (&conninfo, "%s ", pgparams);
+
+ asprintf (&conninfo, "%sdbname = '%s'", conninfo ? conninfo : "", dbName);
+ if (pghost)
+ asprintf (&conninfo, "%s host = '%s'", conninfo, pghost);
+ if (pgport)
+ asprintf (&conninfo, "%s port = '%s'", conninfo, pgport);
+ if (pgoptions)
+ asprintf (&conninfo, "%s options = '%s'", conninfo, pgoptions);
+ /* if (pgtty) -- ignored by PQconnectdb */
+ if (pguser)
+ asprintf (&conninfo, "%s user = '%s'", conninfo, pguser);
+
+ if (verbose) /* do not include password (see right below) in output */
+ printf ("Connecting to PostgreSQL using conninfo: %s%s\n", conninfo,
+ pgpasswd ? " password = <hidden>" : "");
+
+ if (pgpasswd)
+ asprintf (&conninfo, "%s password = '%s'", conninfo, pgpasswd);
/* make a connection to the database */
- time (&start_time);
- conn =
- PQsetdbLogin (pghost, pgport, pgoptions, pgtty, dbName, pguser, pgpasswd);
- time (&end_time);
- elapsed_time = (int) (end_time - start_time);
+ gettimeofday (&start_timeval, NULL);
+ conn = PQconnectdb (conninfo);
+ gettimeofday (&end_timeval, NULL);
+
+ while (start_timeval.tv_usec > end_timeval.tv_usec) {
+ --end_timeval.tv_sec;
+ end_timeval.tv_usec += 1000000;
+ }
+ elapsed_time = (double)(end_timeval.tv_sec - start_timeval.tv_sec)
+ + (double)(end_timeval.tv_usec - start_timeval.tv_usec) / 1000000.0;
+
if (verbose)
- printf("Time elapsed: %d\n", elapsed_time);
+ printf("Time elapsed: %f\n", elapsed_time);
/* check to see that the backend connection was successfully made */
if (verbose)
@@ -194,14 +233,32 @@ main (int argc, char **argv)
else {
status = STATE_OK;
}
+
+ if (verbose) {
+ char *server_host = PQhost (conn);
+ int server_version = PQserverVersion (conn);
+
+ printf ("Successfully connected to database %s (user %s) "
+ "at server %s%s%s (server version: %d.%d.%d, "
+ "protocol version: %d, pid: %d)\n",
+ PQdb (conn), PQuser (conn),
+ PSQL_SOCKET3 (server_host, PQport (conn)),
+ PSQL_SERVER_VERSION3 (server_version),
+ PQprotocolVersion (conn), PQbackendPID (conn));
+ }
+
+ printf (_(" %s - database %s (%f sec.)|%s\n"),
+ state_text(status), dbName, elapsed_time,
+ fperfdata("time", elapsed_time, "s",
+ !!(twarn > 0.0), twarn, !!(tcrit > 0.0), tcrit, TRUE, 0, FALSE,0));
+
+ if (pgquery)
+ query_status = do_query (conn, pgquery);
+
if (verbose)
printf("Closing connection\n");
PQfinish (conn);
- printf (_(" %s - database %s (%d sec.)|%s\n"),
- state_text(status), dbName, elapsed_time,
- fperfdata("time", elapsed_time, "s",
- (int)twarn, twarn, (int)tcrit, tcrit, TRUE, 0, FALSE,0));
- return status;
+ return (query_status > status) ? query_status : status;
}
@@ -225,12 +282,16 @@ process_arguments (int argc, char **argv)
{"authorization", required_argument, 0, 'a'},
{"port", required_argument, 0, 'P'},
{"database", required_argument, 0, 'd'},
+ {"option", required_argument, 0, 'o'},
+ {"query", required_argument, 0, 'q'},
+ {"query_critical", required_argument, 0, 'C'},
+ {"query_warning", required_argument, 0, 'W'},
{"verbose", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
while (1) {
- c = getopt_long (argc, argv, "hVt:c:w:H:P:d:l:p:a:v",
+ c = getopt_long (argc, argv, "hVt:c:w:H:P:d:l:p:a:o:q:C:W:v",
longopts, &option);
if (c == EOF)
@@ -263,8 +324,14 @@ process_arguments (int argc, char **argv)
else
twarn = strtod (optarg, NULL);
break;
+ case 'C': /* critical query threshold */
+ query_critical = optarg;
+ break;
+ case 'W': /* warning query threshold */
+ query_warning = optarg;
+ break;
case 'H': /* host */
- if (!is_host (optarg))
+ if ((*optarg != '/') && (!is_host (optarg)))
usage2 (_("Invalid hostname/address"), optarg);
else
pghost = optarg;
@@ -291,12 +358,23 @@ process_arguments (int argc, char **argv)
case 'a':
pgpasswd = optarg;
break;
+ case 'o':
+ if (pgparams)
+ asprintf (&pgparams, "%s %s", pgparams, optarg);
+ else
+ asprintf (&pgparams, "%s", optarg);
+ break;
+ case 'q':
+ pgquery = optarg;
+ break;
case 'v':
verbose++;
break;
}
}
+ set_thresholds (&qthresholds, query_warning, query_critical);
+
return validate_arguments ();
}
@@ -434,8 +512,6 @@ print_help (void)
printf (UT_HOST_PORT, 'P', myport);
- printf (UT_IPv46);
-
printf (" %s\n", "-d, --database=STRING");
printf (" %s", _("Database to check "));
printf (_("(default: %s)"), DEFAULT_DB);
@@ -443,11 +519,20 @@ print_help (void)
printf (" %s\n", _("Login name of user"));
printf (" %s\n", "-p, --password = STRING");
printf (" %s\n", _("Password (BIG SECURITY ISSUE)"));
+ printf (" %s\n", "-o, --option = STRING");
+ printf (" %s\n", _("Connection parameters (keyword = value), see below"));
printf (UT_WARN_CRIT);
printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+ printf (" %s\n", "-q, --query=STRING");
+ printf (" %s\n", _("SQL query to run. Only first column in first row will be read"));
+ printf (" %s\n", "-W, --query-warning=RANGE");
+ printf (" %s\n", _("SQL query value to result in warning status (double)"));
+ printf (" %s\n", "-C, --query-critical=RANGE");
+ printf (" %s\n", _("SQL query value to result in critical status (double)"));
+
printf (UT_VERBOSE);
printf ("\n");
@@ -458,6 +543,22 @@ print_help (void)
printf (" %s\n", _("connects to the template1 database, which is present in every functioning"));
printf (" %s\n\n", _("PostgreSQL DBMS."));
+ printf (" %s\n", _("If a query is specified using the -q option, it will be executed after"));
+ printf (" %s\n", _("connecting to the server. The result from the query has to be numeric."));
+ printf (" %s\n", _("Multiple SQL commands, separated by semicolon, are allowed but the result "));
+ printf (" %s\n", _("of the last command is taken into account only. The value of the first"));
+ printf (" %s\n\n", _("column in the first row is used as the check result."));
+
+ printf (" %s\n", _("See the chapter \"Monitoring Database Activity\" of the PostgreSQL manual"));
+ printf (" %s\n\n", _("for details about how to access internal statistics of the database server."));
+
+ printf (" %s\n", _("For a list of available connection parameters which may be used with the -o"));
+ printf (" %s\n", _("command line option, see the documentation for PQconnectdb() in the chapter"));
+ printf (" %s\n", _("\"libpq - C Library\" of the PostgreSQL manual. For example, this may be"));
+ printf (" %s\n", _("used to specify a service name in pg_service.conf to be used for additional"));
+ printf (" %s\n", _("connection parameters: -o 'service=<name>' or to specify the SSL mode:"));
+ printf (" %s\n\n", _("-o 'sslmode=require'."));
+
printf (" %s\n", _("The plugin will connect to a local postmaster if no host is specified. To"));
printf (" %s\n", _("connect to a remote host, be sure that the remote postmaster accepts TCP/IP"));
printf (" %s\n\n", _("connections (start the postmaster with the -i option)."));
@@ -476,5 +577,74 @@ print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf ("%s [-H <host>] [-4|-6] [-P <port>] [-c <critical time>] [-w <warning time>]\n", progname);
- printf (" [-t <timeout>] [-d <database>] [-l <logname>] [-p <password>]\n");
+ printf (" [-t <timeout>] [-d <database>] [-l <logname>] [-p <password>]\n"
+ "[-q <query>] [-C <critical query range>] [-W <warning query range>]\n");
}
+
+int
+do_query (PGconn *conn, char *query)
+{
+ PGresult *res;
+
+ char *val_str;
+ double value;
+
+ char *endptr = NULL;
+
+ int my_status = STATE_UNKNOWN;
+
+ if (verbose)
+ printf ("Executing SQL query \"%s\".\n");
+ res = PQexec (conn, query);
+
+ if (PGRES_TUPLES_OK != PQresultStatus (res)) {
+ printf (_("QUERY %s - %s: %s.\n"), _("CRITICAL"), _("Error with query"),
+ PQerrorMessage (conn));
+ return STATE_CRITICAL;
+ }
+
+ if (PQntuples (res) < 1) {
+ printf ("QUERY %s - %s.\n", _("WARNING"), _("No rows returned"));
+ return STATE_WARNING;
+ }
+
+ if (PQnfields (res) < 1) {
+ printf ("QUERY %s - %s.\n", _("WARNING"), _("No columns returned"));
+ return STATE_WARNING;
+ }
+
+ val_str = PQgetvalue (res, 0, 0);
+ if (! val_str) {
+ printf ("QUERY %s - %s.\n", _("CRITICAL"), _("No data returned"));
+ return STATE_CRITICAL;
+ }
+
+ value = strtod (val_str, &endptr);
+ if (verbose)
+ printf ("Query result: %f\n", value);
+
+ if (endptr == val_str) {
+ printf ("QUERY %s - %s: %s\n", _("CRITICAL"), _("Is not a numeric"), val_str);
+ return STATE_CRITICAL;
+ }
+ else if ((endptr != NULL) && (*endptr != '\0')) {
+ if (verbose)
+ printf ("Garbage after value: %s.\n", endptr);
+ }
+
+ my_status = get_status (value, qthresholds);
+ printf ("QUERY %s - ",
+ (my_status == STATE_OK)
+ ? _("OK")
+ : (my_status == STATE_WARNING)
+ ? _("WARNING")
+ : (my_status == STATE_CRITICAL)
+ ? _("CRITICAL")
+ : _("UNKNOWN"));
+ printf (_("'%s' returned %f"), query, value);
+ printf ("|query=%f;%s;%s;;\n", value,
+ query_warning ? query_warning : "",
+ query_critical ? query_critical : "");
+ return my_status;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 10:27:44 +0000