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-rw-r--r--plugins/check_pgsql.c126
1 files changed, 115 insertions, 11 deletions
diff --git a/plugins/check_pgsql.c b/plugins/check_pgsql.c
index 69edae75..edad116a 100644
--- a/plugins/check_pgsql.c
+++ b/plugins/check_pgsql.c
@@ -56,6 +56,7 @@ 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 */
@@ -67,12 +68,12 @@ char *pguser = NULL;
char *pgpasswd = 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> \-\@\@
@@ -117,7 +118,6 @@ Please note that all tags must be lowercase to use the DocBook XML DTD.
<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 +132,11 @@ Please note that all tags must be lowercase to use the DocBook XML DTD.
int
main (int argc, char **argv)
{
+ PGconn *conn;
+
int 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
@@ -194,14 +197,18 @@ main (int argc, char **argv)
else {
status = STATE_OK;
}
- 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;
+
+ if (pgquery)
+ query_status = do_query (conn, pgquery);
+
+ if (verbose)
+ printf("Closing connection\n");
+ PQfinish (conn);
+ return (query_status > status) ? query_status : status;
}
@@ -225,12 +232,15 @@ process_arguments (int argc, char **argv)
{"authorization", required_argument, 0, 'a'},
{"port", required_argument, 0, 'P'},
{"database", required_argument, 0, 'd'},
+ {"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:q:C:W:v",
longopts, &option);
if (c == EOF)
@@ -263,6 +273,12 @@ 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))
usage2 (_("Invalid hostname/address"), optarg);
@@ -291,12 +307,17 @@ process_arguments (int argc, char **argv)
case 'a':
pgpasswd = optarg;
break;
+ case 'q':
+ pgquery = optarg;
+ break;
case 'v':
verbose++;
break;
}
}
+ set_thresholds (&qthresholds, query_warning, query_critical);
+
return validate_arguments ();
}
@@ -448,6 +469,13 @@ print_help (void)
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 +486,15 @@ 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", _("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 +513,72 @@ print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf ("%s [-H <host>] [-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;0\n", value, query_warning, query_critical);
+ return my_status;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 10:20:35 +0000