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|
/*
** Zabbix
** Copyright (C) 2001-2014 Zabbix SIA
**
** 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 2 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, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "db.h"
#include "log.h"
#include "mutexs.h"
#define LOCK_ITSERVICES zbx_mutex_lock(&itservices_lock)
#define UNLOCK_ITSERVICES zbx_mutex_unlock(&itservices_lock)
static ZBX_MUTEX itservices_lock;
/* status update queue items */
typedef struct
{
/* the update source id */
zbx_uint64_t sourceid;
/* the new status */
int status;
/* timestmap */
int clock;
}
zbx_status_update_t;
/* IT service node */
typedef struct
{
/* service id */
zbx_uint64_t serviceid;
/* trigger id of leaf nodes */
zbx_uint64_t triggerid;
/* the initial service status */
int old_status;
/* the calculated service status */
int status;
/* the service status calculation algorithm, see SERVICE_ALGORITHM_* defines */
int algorithm;
/* the parent nodes */
zbx_vector_ptr_t parents;
/* the child nodes */
zbx_vector_ptr_t children;
}
zbx_itservice_t;
/* index of services by triggerid */
typedef struct
{
zbx_uint64_t triggerid;
zbx_vector_ptr_t itservices;
}
zbx_itservice_index_t;
/* a set of IT services used during update session */
/* */
/* All services are stored into hashset accessed by serviceid. The services */
/* also are indexed by triggerid. */
/* The following types of services are loaded during update session: */
/* 1) services directly linked to the triggers with values changed */
/* during update session. */
/* 2) direct or indirect parent services of (1) */
/* 3) services required to calculate status of (2) and not already loaded */
/* as (1) or (2). */
/* */
/* In this schema: */
/* (1) can't have children services */
/* (2) will have children services */
/* (1) and (2) will have parent services unless it's the root service */
/* (3) will have neither children or parent services */
/* */
typedef struct
{
/* loaded IT services */
zbx_hashset_t itservices;
/* service index by triggerid */
zbx_hashset_t index;
}
zbx_itservices_t;
/******************************************************************************
* *
* Function: its_itservices_init *
* *
* Purpose: initializes IT services data set to store services during update *
* session *
* *
* Parameters: set - [IN] the data set to initialize *
* *
******************************************************************************/
static void its_itservices_init(zbx_itservices_t *itservices)
{
zbx_hashset_create(&itservices->itservices, 512, ZBX_DEFAULT_UINT64_HASH_FUNC, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_hashset_create(&itservices->index, 128, ZBX_DEFAULT_UINT64_HASH_FUNC, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
}
/******************************************************************************
* *
* Function: its_itservices_clean *
* *
* Purpose: cleans IT services data set by releasing allocated memory *
* *
* Parameters: set - [IN] the data set to clean *
* *
******************************************************************************/
static void its_itservices_clean(zbx_itservices_t *itservices)
{
zbx_hashset_iter_t iter;
zbx_itservice_t *itservice;
zbx_itservice_index_t *index;
zbx_hashset_iter_reset(&itservices->index, &iter);
while (NULL != (index = zbx_hashset_iter_next(&iter)))
zbx_vector_ptr_destroy(&index->itservices);
zbx_hashset_destroy(&itservices->index);
zbx_hashset_iter_reset(&itservices->itservices, &iter);
while (NULL != (itservice = zbx_hashset_iter_next(&iter)))
{
zbx_vector_ptr_destroy(&itservice->children);
zbx_vector_ptr_destroy(&itservice->parents);
}
zbx_hashset_destroy(&itservices->itservices);
}
/******************************************************************************
* *
* Function: its_itservice_create *
* *
* Purpose: creates a new IT service node *
* *
* Parameters: itservices - [IN] the IT services data *
* serviceid - [IN] the service id *
* algorithm - [IN] the service status calculation mode *
* triggerid - [IN] the source trigger id for leaf nodes *
* status - [IN] the initial service status *
* *
* Return value: the created IT service node *
* *
******************************************************************************/
static zbx_itservice_t *its_itservice_create(zbx_itservices_t *itservices, zbx_uint64_t serviceid,
zbx_uint64_t triggerid, int status, int algorithm)
{
zbx_itservice_t itservice = {serviceid, triggerid, status, status, algorithm}, *pitservice;
zbx_itservice_index_t *pindex;
zbx_vector_ptr_create(&itservice.children);
zbx_vector_ptr_create(&itservice.parents);
pitservice = zbx_hashset_insert(&itservices->itservices, &itservice, sizeof(itservice));
if (0 != triggerid)
{
if (NULL == (pindex = zbx_hashset_search(&itservices->index, &triggerid)))
{
zbx_itservice_index_t index = {triggerid};
zbx_vector_ptr_create(&index.itservices);
pindex = zbx_hashset_insert(&itservices->index, &index, sizeof(index));
}
zbx_vector_ptr_append(&pindex->itservices, pitservice);
}
return pitservice;
}
/******************************************************************************
* *
* Function: its_updates_append *
* *
* Purpose: adds an update to the queue *
* *
* Parameters: updates - [OUT] the update queue *
* sourceid - [IN] the update source id *
* status - [IN] the update status *
* clock - [IN] the update timestamp *
* *
******************************************************************************/
static void its_updates_append(zbx_vector_ptr_t *updates, zbx_uint64_t sourceid, int status, int clock)
{
zbx_status_update_t *update;
update = zbx_malloc(NULL, sizeof(zbx_status_update_t));
update->sourceid = sourceid;
update->status = status;
update->clock = clock;
zbx_vector_ptr_append(updates, update);
}
static void zbx_status_update_free(zbx_status_update_t *update)
{
zbx_free(update);
}
/******************************************************************************
* *
* Function: its_itservices_load_children *
* *
* Purpose: loads all missing children of the specified services *
* *
* Parameters: itservices - [IN] the IT services data *
* *
******************************************************************************/
static void its_itservices_load_children(zbx_itservices_t *itservices)
{
const char *__function_name = "its_itservices_load_children";
char *sql = NULL;
size_t sql_alloc = 0, sql_offset = 0;
DB_RESULT result;
DB_ROW row;
zbx_itservice_t *itservice, *parent;
zbx_uint64_t serviceid, parentid;
zbx_vector_uint64_t serviceids;
zbx_hashset_iter_t iter;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
zbx_vector_uint64_create(&serviceids);
zbx_hashset_iter_reset(&itservices->itservices, &iter);
while (NULL != (itservice = zbx_hashset_iter_next(&iter)))
{
if (0 == itservice->triggerid)
zbx_vector_uint64_append(&serviceids, itservice->serviceid);
}
/* check for extreme case when there are only leaf nodes */
if (0 == serviceids.values_num)
goto out;
zbx_vector_uint64_sort(&serviceids, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_strcpy_alloc(&sql, &sql_alloc, &sql_offset,
"select s.serviceid,s.status,s.algorithm,sl.serviceupid"
" from services s,services_links sl"
" where s.serviceid=sl.servicedownid"
" and");
DBadd_condition_alloc(&sql, &sql_alloc, &sql_offset, "sl.serviceupid", serviceids.values,
serviceids.values_num);
result = DBselect("%s", sql);
while (NULL != (row = DBfetch(result)))
{
ZBX_STR2UINT64(serviceid, row[0]);
ZBX_STR2UINT64(parentid, row[3]);
if (NULL == (parent = zbx_hashset_search(&itservices->itservices, &parentid)))
{
THIS_SHOULD_NEVER_HAPPEN;
continue;
}
if (NULL == (itservice = zbx_hashset_search(&itservices->itservices, &serviceid)))
itservice = its_itservice_create(itservices, serviceid, 0, atoi(row[1]), atoi(row[2]));
if (FAIL == zbx_vector_ptr_search(&parent->children, itservice, ZBX_DEFAULT_PTR_COMPARE_FUNC))
zbx_vector_ptr_append(&parent->children, itservice);
}
DBfree_result(result);
zbx_free(sql);
zbx_vector_uint64_destroy(&serviceids);
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
}
/******************************************************************************
* *
* Function: its_itservices_load_parents *
* *
* Purpose: recursively loads parent nodes of the specified service until the *
* root node *
* *
* Parameters: itservices - [IN] the IT services data *
* serviceids - [IN] a vector containing ids of services to *
* load parents *
* *
******************************************************************************/
static void its_itservices_load_parents(zbx_itservices_t *itservices, zbx_vector_uint64_t *serviceids)
{
const char *__function_name = "its_itservices_load_parents";
DB_RESULT result;
DB_ROW row;
char *sql = NULL;
size_t sql_alloc = 0, sql_offset = 0;
zbx_itservice_t *parent, *itservice;
zbx_uint64_t parentid, serviceid;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
zbx_vector_uint64_sort(serviceids, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_vector_uint64_uniq(serviceids, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_strcpy_alloc(&sql, &sql_alloc, &sql_offset,
"select s.serviceid,s.status,s.algorithm,sl.servicedownid"
" from services s,services_links sl"
" where s.serviceid=sl.serviceupid"
" and");
DBadd_condition_alloc(&sql, &sql_alloc, &sql_offset, "sl.servicedownid", serviceids->values,
serviceids->values_num);
serviceids->values_num = 0;
result = DBselect("%s", sql);
while (NULL != (row = DBfetch(result)))
{
ZBX_STR2UINT64(parentid, row[0]);
ZBX_STR2UINT64(serviceid, row[3]);
/* find the service */
if (NULL == (itservice = zbx_hashset_search(&itservices->itservices, &serviceid)))
{
THIS_SHOULD_NEVER_HAPPEN;
continue;
}
/* find/load the parent service */
if (NULL == (parent = zbx_hashset_search(&itservices->itservices, &parentid)))
{
parent = its_itservice_create(itservices, parentid, 0, atoi(row[1]), atoi(row[2]));
zbx_vector_uint64_append(serviceids, parent->serviceid);
}
/* link the service as a parent's child */
if (FAIL == zbx_vector_ptr_search(&itservice->parents, parent, ZBX_DEFAULT_PTR_COMPARE_FUNC))
zbx_vector_ptr_append(&itservice->parents, parent);
}
DBfree_result(result);
zbx_free(sql);
if (0 != serviceids->values_num)
its_itservices_load_parents(itservices, serviceids);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
}
/******************************************************************************
* *
* Function: its_load_services_by_triggerids *
* *
* Purpose: loads services that might be affected by the specified triggerid *
* or are required to calculate status of loaded services *
* *
* Parameters: itservices - [IN] the IT services data *
* triggerids - [IN] the sorted list of trigger ids *
* *
******************************************************************************/
static void its_load_services_by_triggerids(zbx_itservices_t *itservices, const zbx_vector_uint64_t *triggerids)
{
const char *__function_name = "its_load_services_by_triggerids";
DB_RESULT result;
DB_ROW row;
zbx_uint64_t serviceid, triggerid;
zbx_itservice_t *itservice;
char *sql = NULL;
size_t sql_alloc = 0, sql_offset = 0;
zbx_vector_uint64_t serviceids;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
zbx_vector_uint64_create(&serviceids);
zbx_strcpy_alloc(&sql, &sql_alloc, &sql_offset,
"select serviceid,triggerid,status,algorithm"
" from services"
" where");
DBadd_condition_alloc(&sql, &sql_alloc, &sql_offset, "triggerid", triggerids->values, triggerids->values_num);
result = DBselect("%s", sql);
zbx_free(sql);
while (NULL != (row = DBfetch(result)))
{
ZBX_STR2UINT64(serviceid, row[0]);
ZBX_STR2UINT64(triggerid, row[1]);
itservice = its_itservice_create(itservices, serviceid, triggerid, atoi(row[2]), atoi(row[3]));
zbx_vector_uint64_append(&serviceids, itservice->serviceid);
}
DBfree_result(result);
if (0 != serviceids.values_num)
{
its_itservices_load_parents(itservices, &serviceids);
its_itservices_load_children(itservices);
}
zbx_vector_uint64_destroy(&serviceids);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
}
/******************************************************************************
* *
* Function: its_itservice_update_status *
* *
* Purpose: updates service and its parents statuses *
* *
* Parameters: service - [IN] the service to update *
* clock - [IN] the update timestamp *
* alarms - [OUT] the alarms update queue *
* *
* Comments: This function recalculates service status according to the *
* algorithm and status of the children services. If the status *
* has been changed, an alarm is generated and parent services *
* (up until the root service) are updated too. *
* *
******************************************************************************/
static void its_itservice_update_status(zbx_itservice_t *itservice, int clock, zbx_vector_ptr_t *alarms)
{
int status, i;
switch (itservice->algorithm)
{
case SERVICE_ALGORITHM_MIN:
status = TRIGGER_SEVERITY_COUNT;
for (i = 0; i < itservice->children.values_num; i++)
{
zbx_itservice_t *child = (zbx_itservice_t *)itservice->children.values[i];
if (child->status < status)
status = child->status;
}
break;
case SERVICE_ALGORITHM_MAX:
status = 0;
for (i = 0; i < itservice->children.values_num; i++)
{
zbx_itservice_t *child = (zbx_itservice_t *)itservice->children.values[i];
if (child->status > status)
status = child->status;
}
break;
case SERVICE_ALGORITHM_NONE:
goto out;
default:
zabbix_log(LOG_LEVEL_ERR, "unknown calculation algorithm of service status [%d]",
itservice->algorithm);
goto out;
}
if (itservice->status != status)
{
itservice->status = status;
its_updates_append(alarms, itservice->serviceid, status, clock);
/* update parent services */
for (i = 0; i < itservice->parents.values_num; i++)
its_itservice_update_status(itservice->parents.values[i], clock, alarms);
}
out:
;
}
/******************************************************************************
* *
* Function: its_updates_compare *
* *
* Purpose: used to sort service updates by source id *
* *
******************************************************************************/
static int its_updates_compare(const zbx_status_update_t **update1, const zbx_status_update_t **update2)
{
ZBX_RETURN_IF_NOT_EQUAL((*update1)->sourceid, (*update2)->sourceid);
return 0;
}
/******************************************************************************
* *
* Function: its_write_status_and_alarms *
* *
* Purpose: writes service status changes and generated service alarms into *
* database *
* *
* Parameters: itservices - [IN] the IT services data *
* alarms - [IN] the service alarms update queue *
* *
* Return value: SUCCEED - the data was written successfully *
* FAIL - otherwise *
* *
******************************************************************************/
static int its_write_status_and_alarms(zbx_itservices_t *itservices, zbx_vector_ptr_t *alarms)
{
int i, ret = FAIL;
zbx_vector_ptr_t updates;
char *sql = NULL;
size_t sql_alloc = 0, sql_offset = 0;
zbx_uint64_t alarmid;
zbx_hashset_iter_t iter;
zbx_itservice_t *itservice;
/* get a list of service status updates that must be written to database */
zbx_vector_ptr_create(&updates);
zbx_hashset_iter_reset(&itservices->itservices, &iter);
while (NULL != (itservice = zbx_hashset_iter_next(&iter)))
{
if (itservice->old_status != itservice->status)
its_updates_append(&updates, itservice->serviceid, itservice->status, 0);
}
/* write service status changes into database */
DBbegin_multiple_update(&sql, &sql_alloc, &sql_offset);
if (0 != updates.values_num)
{
zbx_vector_ptr_sort(&updates, (zbx_compare_func_t)its_updates_compare);
zbx_vector_ptr_uniq(&updates, (zbx_compare_func_t)its_updates_compare);
for (i = 0; i < updates.values_num; i++)
{
zbx_status_update_t *update = updates.values[i];
zbx_snprintf_alloc(&sql, &sql_alloc, &sql_offset,
"update services"
" set status=%d"
" where serviceid=" ZBX_FS_UI64 ";\n",
update->status, update->sourceid);
if (SUCCEED != DBexecute_overflowed_sql(&sql, &sql_alloc, &sql_offset))
goto out;
}
}
DBend_multiple_update(&sql, &sql_alloc, &sql_offset);
if (16 < sql_offset)
{
if (ZBX_DB_OK > DBexecute("%s", sql))
goto out;
}
ret = SUCCEED;
/* write generated service alarms into database */
if (0 != alarms->values_num)
{
zbx_db_insert_t db_insert;
alarmid = DBget_maxid_num("service_alarms", alarms->values_num);
zbx_db_insert_prepare(&db_insert, "service_alarms", "servicealarmid", "serviceid", "value", "clock",
NULL);
for (i = 0; i < alarms->values_num; i++)
{
zbx_status_update_t *update = alarms->values[i];
zbx_db_insert_add_values(&db_insert, alarmid++, update->sourceid, update->status,
update->clock);
}
ret = zbx_db_insert_execute(&db_insert);
zbx_db_insert_clean(&db_insert);
}
out:
zbx_free(sql);
zbx_vector_ptr_clean(&updates, (zbx_mem_free_func_t)zbx_status_update_free);
zbx_vector_ptr_destroy(&updates);
return ret;
}
/******************************************************************************
* *
* Function: its_flush_updates *
* *
* Purpose: processes the service update queue *
* *
* Return value: SUCCEED - the data was written successfully *
* FAIL - otherwise *
* *
* Comments: The following steps are taken to process the queue: *
* 1) Load all services either directly referenced (with triggerid) *
* by update queue or dependent on those services (directly or *
* indirectly) or required to calculate status of any loaded *
* services. *
* 2) Apply updates to the loaded service tree. Queue new service *
* alarms whenever service status changes. *
* 3) Write the final service status changes and the generated *
* service alarm queue into database. *
* *
******************************************************************************/
static int its_flush_updates(zbx_vector_ptr_t *updates)
{
const char *__function_name = "its_flush_updates";
int j, i, ret = FAIL;
zbx_status_update_t *update;
zbx_itservices_t itservices;
zbx_vector_ptr_t alarms;
zbx_itservice_index_t *index;
zbx_vector_uint64_t triggerids;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
its_itservices_init(&itservices);
zbx_vector_uint64_create(&triggerids);
for (i = 0; i < updates->values_num; i++)
{
update = (zbx_status_update_t *)updates->values[i];
zbx_vector_uint64_append(&triggerids, update->sourceid);
}
zbx_vector_uint64_sort(&triggerids, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
/* load all services affected by the trigger status change and */
/* the services that are required for resulting status calculations */
its_load_services_by_triggerids(&itservices, &triggerids);
zbx_vector_uint64_destroy(&triggerids);
if (0 == itservices.itservices.num_data)
{
ret = SUCCEED;
goto out;
}
zbx_vector_ptr_create(&alarms);
/* apply status updates */
for (j = 0; j < updates->values_num; j++)
{
update = updates->values[j];
if (NULL != (index = zbx_hashset_search(&itservices.index, update)))
{
/* change the status of services based on the update */
for (i = 0; i < index->itservices.values_num; i++)
{
zbx_itservice_t *itservice = (zbx_itservice_t*)index->itservices.values[i];
if (SERVICE_ALGORITHM_NONE == itservice->algorithm ||
itservice->status == update->status)
{
continue;
}
its_updates_append(&alarms, itservice->serviceid, update->status, update->clock);
itservice->status = update->status;
}
/* recalculate status of the parent services */
for (i = 0; i < index->itservices.values_num; i++)
{
zbx_itservice_t *itservice = (zbx_itservice_t*)index->itservices.values[i];
/* update parent services */
for (i = 0; i < itservice->parents.values_num; i++)
{
its_itservice_update_status(itservice->parents.values[i], update->clock,
&alarms);
}
}
}
}
ret = its_write_status_and_alarms(&itservices, &alarms);
zbx_vector_ptr_clean(&alarms, (zbx_mem_free_func_t)zbx_status_update_free);
zbx_vector_ptr_destroy(&alarms);
out:
its_itservices_clean(&itservices);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/*
* Public API
*/
/******************************************************************************
* *
* Function: DBupdate_itservices *
* *
* Purpose: updates IT services by applying event list *
* *
* Return value: SUCCEED - the IT services were updated successfully *
* FAIL - otherwise *
* *
******************************************************************************/
int DBupdate_itservices(const DB_EVENT *events, size_t events_num)
{
const char *__function_name = "DBupdate_itservices";
int i, ret = SUCCEED;
zbx_vector_ptr_t updates;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
zbx_vector_ptr_create(&updates);
for (i = 0; i < events_num; i++)
{
if (EVENT_SOURCE_TRIGGERS != events[i].source)
continue;
its_updates_append(&updates, events[i].objectid, TRIGGER_VALUE_PROBLEM == events[i].value ?
events[i].trigger.priority : 0, events[i].clock);
}
if (0 != updates.values_num)
{
LOCK_ITSERVICES;
ret = its_flush_updates(&updates);
UNLOCK_ITSERVICES;
zbx_vector_ptr_clean(&updates, free);
}
zbx_vector_ptr_destroy(&updates);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Function: DBremove_itservice_triggers *
* *
* Purpose: removes specified trigger ids from dependent services and reset *
* the status of those services to the default value (0) *
* *
* Parameters: triggerids - [IN] an array of trigger ids to remove *
* triggerids_num - [IN] the number of items in triggerids array *
* *
* Return value: SUCCEED - the data was written successfully *
* FAIL - otherwise *
* *
******************************************************************************/
int DBremove_triggers_from_itservices(zbx_uint64_t *triggerids, int triggerids_num)
{
char *sql = NULL;
size_t sql_alloc = 0, sql_offset = 0;
zbx_vector_ptr_t updates;
int i, ret = FAIL, now;
if (0 == triggerids_num)
return SUCCEED;
now = time(NULL);
zbx_vector_ptr_create(&updates);
for (i = 0; i < triggerids_num; i++)
its_updates_append(&updates, triggerids[i], 0, now);
LOCK_ITSERVICES;
if (FAIL == its_flush_updates(&updates))
goto out;
zbx_strcpy_alloc(&sql, &sql_alloc, &sql_offset,
"update services set triggerid=null,showsla=0 where");
DBadd_condition_alloc(&sql, &sql_alloc, &sql_offset, "triggerid", triggerids, triggerids_num);
if (ZBX_DB_OK <= DBexecute("%s", sql))
ret = SUCCEED;
zbx_free(sql);
out:
UNLOCK_ITSERVICES;
zbx_vector_ptr_clean(&updates, (zbx_mem_free_func_t)zbx_status_update_free);
zbx_vector_ptr_destroy(&updates);
return ret;
}
void zbx_create_itservices_lock()
{
if (ZBX_MUTEX_ERROR == zbx_mutex_create_force(&itservices_lock, ZBX_MUTEX_ITSERVICES))
{
zbx_error("cannot create mutex for IT services");
exit(FAIL);
}
}
void zbx_destroy_itservices_lock()
{
zbx_mutex_destroy(&itservices_lock);
}
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