Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "housekeeper_server.h"

​

#include "zbxlog.h"

#include "zbxnix.h"

#include "zbxself.h"

#include "zbxexpression.h"

#include "zbxrtc.h"

#include "zbxnum.h"

#include "zbxtime.h"

#include "history_compress.h"

#include "zbx_rtc_constants.h"

#include "zbx_host_constants.h"

#include "zbxalgo.h"

#include "zbxcacheconfig.h"

#include "zbxdb.h"

#include "zbxdbhigh.h"

#include "zbxipcservice.h"

#include "zbxstr.h"

​

#ifdef HAVE_POSTGRESQL

#include "zbxjson.h"

#endif

​

/* the maximum number of housekeeping periods to be removed per single housekeeping cycle */

#define HK_MAX_DELETE_PERIODS       4

​

#define HK_MIN_CLOCK_UNDEFINED      0

#define HK_MIN_CLOCK_ALWAYS_RECHECK -1

​

/* trends table offsets in the hk_cleanup_tables[] mapping  */

#define HK_UPDATE_CACHE_OFFSET_TREND_FLOAT  (ITEM_VALUE_TYPE_BIN + 1)

#define HK_UPDATE_CACHE_OFFSET_TREND_UINT   (HK_UPDATE_CACHE_OFFSET_TREND_FLOAT + 1)

#define HK_UPDATE_CACHE_TREND_COUNT     2

​

/* Housekeeping rule definition.                                */

/* A housekeeping rule describes table from which records older */

/* than history setting must be removed according to optional   */

/* filter.                                                      */

typedef struct

{

    /* target table name */

    const char  *table;

​

    /* ID field name, required to select IDs of records that must be deleted */

    char        *field_name;

​

    /* Optional filter, must be empty string if not used. Only the records matching */

    /* filter are subject to housekeeping procedures.                               */

    const char  *filter;

​

    /* The oldest record in table (with filter in effect). The min_clock value is   */

    /* read from the database when accessed for the first time and then during      */

    /* housekeeping procedures updated to the last 'cutoff' value.                  */

    int     min_clock;

​

    /* a reference to the housekeeping configuration mode (enable) option for this table */

    unsigned char   *poption_mode;

​

    /* a reference to the settings value specifying number of seconds the records must be kept */

    int     *phistory;

}

zbx_hk_rule_t;

​

/* housekeeper table => configuration data mapping                        */

/* This structure is used to map table names used in housekeeper table to */

/* configuration data.                                                    */

typedef struct

{

    /* housekeeper table name */

    const char  *name;

​

    /* a reference to housekeeping configuration enable value for this table */

    unsigned char   *poption_mode;

​

    /* a reference to the housekeeping configuration overwrite option for this table */

    unsigned char   *poption_global;

}