summaryrefslogtreecommitdiffstats
path: root/plugins/check_pgsql.c
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/check_pgsql.c')
-rw-r--r--plugins/check_pgsql.c636
1 files changed, 636 insertions, 0 deletions
diff --git a/plugins/check_pgsql.c b/plugins/check_pgsql.c
new file mode 100644
index 0000000..6199033
--- /dev/null
+++ b/plugins/check_pgsql.c
@@ -0,0 +1,636 @@
+/*****************************************************************************
+*
+* Monitoring check_pgsql plugin
+*
+* License: GPL
+* Copyright (c) 1999-2011 Monitoring Plugins Development Team
+*
+* Description:
+*
+* This file contains the check_pgsql plugin
+*
+* Test whether a PostgreSQL Database is accepting connections.
+*
+*
+* 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_pgsql";
+const char *copyright = "1999-2011";
+const char *email = "devel@monitoring-plugins.org";
+
+#include "common.h"
+#include "utils.h"
+#include "utils_cmd.h"
+
+#include "netutils.h"
+#include <libpq-fe.h>
+#include <pg_config_manual.h>
+
+#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,
+ DEFAULT_CRIT = 8
+};
+
+
+
+int process_arguments (int, char **);
+int validate_arguments (void);
+void print_usage (void);
+void print_help (void);
+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 */
+int default_port = DEFAULT_PORT;
+char *pgoptions = NULL;
+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;
+#define OPTID_QUERYNAME -1000
+char *pgqueryname = NULL;
+char *query_warning = NULL;
+char *query_critical = NULL;
+thresholds *qthresholds = NULL;
+int verbose = 0;
+
+/******************************************************************************
+
+The (pseudo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
+tags in the comments. With in the tags, the XML is assembled sequentially.
+You can define entities in tags. You also have all the #defines available as
+entities.
+
+Please note that all tags must be lowercase to use the DocBook XML DTD.
+
+@@-<article>
+
+<sect1>
+<title>Quick Reference</title>
+<!-- The refentry forms a manpage -->
+<refentry>
+<refmeta>
+<manvolnum>5<manvolnum>
+</refmeta>
+<refnamdiv>
+<refname>&progname;</refname>
+<refpurpose>&SUMMARY;</refpurpose>
+</refnamdiv>
+</refentry>
+</sect1>
+
+<sect1>
+<title>FAQ</title>
+</sect1>
+
+<sect1>
+<title>Theory, Installation, and Operation</title>
+
+<sect2>
+<title>General Description</title>
+<para>
+&DESCRIPTION;
+</para>
+</sect2>
+
+<sect2>
+<title>Future Enhancements</title>
+<para>ToDo List</para>
+</sect2>
+
+
+<sect2>
+<title>Functions</title>
+-@@
+******************************************************************************/
+
+
+
+int
+main (int argc, char **argv)
+{
+ 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
+ * defaults by looking up environment variables or, failing that,
+ * using hardwired constants */
+
+ pgoptions = NULL; /* special options to start up the backend server */
+ pgtty = NULL; /* debugging tty for the backend server */
+
+ 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"));
+ if (verbose > 2)
+ printf("Arguments initialized\n");
+
+ /* Set signal handling and alarm */
+ if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR) {
+ usage4 (_("Cannot catch SIGALRM"));
+ }
+ alarm (timeout_interval);
+
+ 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 */
+ 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: %f\n", elapsed_time);
+
+ /* check to see that the backend connection was successfully made */
+ if (verbose)
+ printf("Verifying connection\n");
+ if (PQstatus (conn) == CONNECTION_BAD) {
+ printf (_("CRITICAL - no connection to '%s' (%s).\n"),
+ dbName, PQerrorMessage (conn));
+ PQfinish (conn);
+ return STATE_CRITICAL;
+ }
+ else if (elapsed_time > tcrit) {
+ status = STATE_CRITICAL;
+ }
+ else if (elapsed_time > twarn) {
+ status = STATE_WARNING;
+ }
+ 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);
+ return (pgquery && query_status > status) ? query_status : status;
+}
+
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+ int c;
+
+ int option = 0;
+ static struct option longopts[] = {
+ {"help", no_argument, 0, 'h'},
+ {"version", no_argument, 0, 'V'},
+ {"timeout", required_argument, 0, 't'},
+ {"critical", required_argument, 0, 'c'},
+ {"warning", required_argument, 0, 'w'},
+ {"hostname", required_argument, 0, 'H'},
+ {"logname", required_argument, 0, 'l'},
+ {"password", required_argument, 0, 'p'},
+ {"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'},
+ {"queryname", required_argument, 0, OPTID_QUERYNAME},
+ {"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:o:q:C:W:v",
+ longopts, &option);
+
+ if (c == EOF)
+ break;
+
+ switch (c) {
+ case '?': /* usage */
+ usage5 ();
+ case 'h': /* help */
+ print_help ();
+ exit (STATE_UNKNOWN);
+ case 'V': /* version */
+ print_revision (progname, NP_VERSION);
+ exit (STATE_UNKNOWN);
+ case 't': /* timeout period */
+ if (!is_integer (optarg))
+ usage2 (_("Timeout interval must be a positive integer"), optarg);
+ else
+ timeout_interval = atoi (optarg);
+ break;
+ case 'c': /* critical time threshold */
+ if (!is_nonnegative (optarg))
+ usage2 (_("Critical threshold must be a positive integer"), optarg);
+ else
+ tcrit = strtod (optarg, NULL);
+ break;
+ case 'w': /* warning time threshold */
+ if (!is_nonnegative (optarg))
+ usage2 (_("Warning threshold must be a positive integer"), optarg);
+ 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 ((*optarg != '/') && (!is_host (optarg)))
+ usage2 (_("Invalid hostname/address"), optarg);
+ else
+ pghost = optarg;
+ break;
+ case 'P': /* port */
+ if (!is_integer (optarg))
+ usage2 (_("Port must be a positive integer"), optarg);
+ else
+ pgport = optarg;
+ break;
+ case 'd': /* database name */
+ if (strlen(optarg) >= NAMEDATALEN) {
+ usage2 (_("Database name exceeds the maximum length"), optarg);
+ }
+ snprintf(dbName, NAMEDATALEN, "%s", optarg);
+ break;
+ case 'l': /* login name */
+ if (!is_pg_logname (optarg))
+ usage2 (_("User name is not valid"), optarg);
+ else
+ pguser = optarg;
+ break;
+ case 'p': /* authentication password */
+ 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 OPTID_QUERYNAME:
+ pgqueryname = optarg;
+ break;
+ case 'v':
+ verbose++;
+ break;
+ }
+ }
+
+ set_thresholds (&qthresholds, query_warning, query_critical);
+
+ return validate_arguments ();
+}
+
+
+/******************************************************************************
+
+@@-
+<sect3>
+<title>validate_arguments</title>
+
+<para>&PROTO_validate_arguments;</para>
+
+<para>Given a database name, this function returns TRUE if the string
+is a valid PostgreSQL database name, and returns false if it is
+not.</para>
+
+<para>Valid PostgreSQL database names are less than &NAMEDATALEN;
+characters long and consist of letters, numbers, and underscores. The
+first character cannot be a number, however.</para>
+
+</sect3>
+-@@
+******************************************************************************/
+
+
+
+int
+validate_arguments ()
+{
+ return OK;
+}
+
+/**
+
+the tango program should eventually create an entity here based on the
+function prototype
+
+@@-
+<sect3>
+<title>is_pg_logname</title>
+
+<para>&PROTO_is_pg_logname;</para>
+
+<para>Given a username, this function returns TRUE if the string is a
+valid PostgreSQL username, and returns false if it is not. Valid PostgreSQL
+usernames are less than &NAMEDATALEN; characters long and consist of
+letters, numbers, dashes, and underscores, plus possibly some other
+characters.</para>
+
+<para>Currently this function only checks string length. Additional checks
+should be added.</para>
+
+</sect3>
+-@@
+******************************************************************************/
+
+
+
+int
+is_pg_logname (char *username)
+{
+ if (strlen (username) > NAMEDATALEN - 1)
+ return (FALSE);
+ return (TRUE);
+}
+
+/******************************************************************************
+@@-
+</sect2>
+</sect1>
+</article>
+-@@
+******************************************************************************/
+
+
+
+void
+print_help (void)
+{
+ char *myport;
+
+ xasprintf (&myport, "%d", DEFAULT_PORT);
+
+ print_revision (progname, NP_VERSION);
+
+ printf (COPYRIGHT, copyright, email);
+
+ printf (_("Test whether a PostgreSQL Database is accepting connections."));
+
+ printf ("\n\n");
+
+ print_usage ();
+
+ printf (UT_HELP_VRSN);
+ printf (UT_EXTRA_OPTS);
+
+ printf (UT_HOST_PORT, 'P', myport);
+
+ printf (" %s\n", "-d, --database=STRING");
+ printf (" %s", _("Database to check "));
+ printf (_("(default: %s)\n"), DEFAULT_DB);
+ printf (" %s\n", "-l, --logname = STRING");
+ 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_CONN_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", "--queryname=STRING");
+ printf (" %s\n", _("A name for the query, this string is used instead of the query"));
+ printf (" %s\n", _("in the long output of the plugin"));
+ 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");
+ printf (" %s\n", _("All parameters are optional."));
+ printf (" %s\n", _("This plugin tests a PostgreSQL DBMS to determine whether it is active and"));
+ printf (" %s\n", _("accepting queries. In its current operation, it simply connects to the"));
+ printf (" %s\n", _("specified database, and then disconnects. If no database is specified, it"));
+ 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", _("column in the first row is used as the check result. If a second column is"));
+ printf (" %s\n", _("present in the result set, this is added to the plugin output with a"));
+ printf (" %s\n", _("prefix of \"Extra Info:\". This information can be displayed in the system"));
+ printf (" %s\n\n", _("executing the plugin."));
+
+ 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)."));
+
+ printf (" %s\n", _("Typically, the monitoring user (unless the --logname option is used) should be"));
+ printf (" %s\n", _("able to connect to the database without a password. The plugin can also send"));
+ printf (" %s\n", _("a password, but no effort is made to obscure or encrypt the password."));
+
+ printf (UT_SUPPORT);
+}
+
+
+
+void
+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"
+ "[-q <query>] [-C <critical query range>] [-W <warning query range>]\n");
+}
+
+int
+do_query (PGconn *conn, char *query)
+{
+ PGresult *res;
+
+ char *val_str;
+ char *extra_info;
+ double value;
+
+ char *endptr = NULL;
+
+ int my_status = STATE_UNKNOWN;
+
+ if (verbose)
+ printf ("Executing SQL query \"%s\".\n", query);
+ 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"));
+ if(pgqueryname) {
+ printf (_("%s returned %f"), pgqueryname, value);
+ }
+ else {
+ printf (_("'%s' returned %f"), query, value);
+ }
+
+ printf ("|query=%f;%s;%s;;\n", value,
+ query_warning ? query_warning : "",
+ query_critical ? query_critical : "");
+ if (PQnfields (res) > 1) {
+ extra_info = PQgetvalue (res, 0, 1);
+ if (extra_info != NULL) {
+ printf ("Extra Info: %s\n", extra_info);
+ }
+ }
+ return my_status;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 04:03:20 +0000