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/*
** ZABBIX
** Copyright (C) 2000-2006 SIA Zabbix
**
** 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., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/wait.h>
#include <string.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
/* Required for getpwuid */
#include <pwd.h>
#include <signal.h>
#include <errno.h>
#include <time.h>
#include "common.h"
#include "cfg.h"
#include "db.h"
#include "log.h"
#include "zlog.h"
#include "dbsync.h"
#include "nodewatcher.h"
#include "nodesender.h"
/******************************************************************************
* *
* Function: calculate_checksums *
* *
* Purpose: calculate check sums of configuration data *
* *
* Parameters: *
* *
* Return value: SUCCESS - calculated succesfully *
* FAIL - an error occured *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int calculate_checksums()
{
char sql[64000];
char tmp[MAX_STRING_LEN];
char fields[MAX_STRING_LEN];
int i = 0;
int j;
DB_RESULT result;
DB_RESULT result2;
DB_ROW row;
DB_ROW row2;
int nodeid;
int now;
// zabbix_log( LOG_LEVEL_WARNING, "In calculate_checksums");
DBexecute("delete from node_cksum where cksumtype=%d", NODE_CKSUM_TYPE_NEW);
// insert into node_cksum (select NULL,0,'items','itemid',itemid,0,md5(concat(key_)) as md5 from items);
/* Select all nodes */
zbx_snprintf(sql,sizeof(sql),"select nodeid from nodes");
result =DBselect(sql);
while((row=DBfetch(result)))
{
now = time(NULL);
nodeid = atoi(row[0]);
zbx_snprintf(sql,sizeof(sql),"select 'table ','field ',itemid, '012345678901234' from items where 1=0\n");
for(i=0;tables[i].table!=0;i++)
{
// zabbix_log( LOG_LEVEL_WARNING, "In calculate_checksums2 [%s]", tables[i].table );
/* Do not sync some of tables */
if( (tables[i].flags & ZBX_SYNC) ==0) continue;
j=0;
fields[0]=0;
while(tables[i].fields[j].name != 0)
{
// zabbix_log( LOG_LEVEL_WARNING, "In calculate_checksums2 [%s,%s]", tables[i].table,tables[i].fields[j].name );
if( (tables[i].fields[j].flags & ZBX_SYNC) ==0)
{
// zabbix_log( LOG_LEVEL_WARNING, "Skip %s.%s", tables[i].table,tables[i].fields[j].name );
j++;
continue;
}
strncat(fields,"quote(",sizeof(fields));
strncat(fields,tables[i].fields[j].name,sizeof(fields));
strncat(fields,"),",sizeof(fields));
j++;
}
if(fields[0]!=0) fields[strlen(fields)-1] = 0;
// select table,recid,md5(fields) from table union all ...
zbx_snprintf(tmp,sizeof(tmp),"union all select '%s','%s',%s,md5(concat(%s)) from %s where %s>=" ZBX_FS_UI64 " and %s<=" ZBX_FS_UI64 "\n",
tables[i].table, tables[i].recid, tables[i].recid, fields, tables[i].table,
tables[i].recid, (zbx_uint64_t)100000000000000*(zbx_uint64_t)nodeid,
tables[i].recid, (zbx_uint64_t)100000000000000*(zbx_uint64_t)nodeid+99999999999999);
// zabbix_log( LOG_LEVEL_WARNING, "TMP [%s]", tmp);
strncat(sql,tmp,sizeof(sql));
}
// zabbix_log( LOG_LEVEL_WARNING, "SQL [%s]", sql);
result2 =DBselect(sql);
zabbix_log( LOG_LEVEL_WARNING, "Selected records in %d seconds", time(NULL)-now);
now = time(NULL);
i=0;
while((row2=DBfetch(result2)))
{
// zabbix_log( LOG_LEVEL_WARNING, "Cksum [%s]", row2[3]);
DBexecute("insert into node_cksum (cksumid,nodeid,tablename,fieldname,recordid,cksumtype,cksum)"\
"values (" ZBX_FS_UI64 ",%d,'%s','%s',%s,%d,'%s')",
DBget_nextid("node_cksum","cksumid"),
nodeid,row2[0],row2[1],row2[2],NODE_CKSUM_TYPE_NEW,row2[3]);
i++;
}
DBfree_result(result2);
zabbix_log( LOG_LEVEL_WARNING, "Added %d records in %d seconds", i, time(NULL)-now);
}
DBfree_result(result);
return SUCCEED;
}
/******************************************************************************
* *
* Function: update_checksums *
* *
* Purpose: overwrite old checksums with new ones *
* *
* Parameters: *
* *
* Return value: SUCCESS - calculated succesfully *
* FAIL - an error occured *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int update_checksums()
{
/* Begin work */
DBexecute("delete from node_cksum where cksumtype=%d", NODE_CKSUM_TYPE_OLD);
DBexecute("update node_cksum set cksumtype=%d where cksumtype=%d", NODE_CKSUM_TYPE_OLD, NODE_CKSUM_TYPE_NEW);
/* Commit */
return SUCCEED;
}
/******************************************************************************
* *
* Function: compare_checksums *
* *
* Purpose: compare new checksums with old ones. Write difference to *
* table 'node_config' *
* *
* Parameters: *
* *
* Return value: SUCCESS - calculated succesfully *
* FAIL - an error occured *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static int compare_checksums()
{
DB_RESULT result;
DB_ROW row;
/* Begin work */
/* Find updated records */
result = DBselect("select new.nodeid,new.tablename,new.recordid from node_cksum old, node_cksum new where new.tablename=old.tablename and new.recordid=old.recordid and new.fieldname=old.fieldname and new.nodeid=old.nodeid and new.cksum<>old.cksum and new.cksumtype=%d and old.cksumtype=%d", NODE_CKSUM_TYPE_NEW, NODE_CKSUM_TYPE_OLD);
while((row=DBfetch(result)))
{
// zabbix_log( LOG_LEVEL_WARNING, "Adding record to node_configlog");
DBexecute("insert into node_configlog (conflogid,nodeid,tablename,recordid,operation)" \
"values (" ZBX_FS_UI64 ",%s,'%s',%s,%d)",
DBget_nextid("node_configlog","conflogid"),
row[0],row[1],row[2],NODE_CONFIGLOG_OP_UPDATE);
}
DBfree_result(result);
/* Find new records */
result = DBselect("select new.nodeid,new.tablename,new.recordid from node_cksum new" \
" left join node_cksum old" \
" on new.tablename=old.tablename and new.recordid=old.recordid and new.fieldname=old.fieldname and new.nodeid=old.nodeid and new.cksumtype<>old.cksumtype" \
" where old.cksumid is null and new.cksumtype=%d", NODE_CKSUM_TYPE_NEW);
while((row=DBfetch(result)))
{
// zabbix_log( LOG_LEVEL_WARNING, "Adding record to node_configlog");
DBexecute("insert into node_configlog (conflogid,nodeid,tablename,recordid,operation)" \
"values (" ZBX_FS_UI64 ",%s,'%s',%s,%d)",
DBget_nextid("node_configlog","conflogid"),
row[0],row[1],row[2],NODE_CONFIGLOG_OP_ADD);
}
DBfree_result(result);
/* Find deleted records */
result = DBselect("select new.nodeid,new.tablename,new.recordid from node_cksum new" \
" left join node_cksum old" \
" on new.tablename=old.tablename and new.recordid=old.recordid and new.fieldname=old.fieldname and new.nodeid=old.nodeid and new.cksumtype<>old.cksumtype" \
" where old.cksumid is null and new.cksumtype=%d", NODE_CKSUM_TYPE_OLD);
while((row=DBfetch(result)))
{
// zabbix_log( LOG_LEVEL_WARNING, "Adding record to node_configlog");
DBexecute("insert into node_configlog (conflogid,nodeid,tablename,recordid,operation)" \
"values (" ZBX_FS_UI64 ",%s,'%s',%s,%d)",
DBget_nextid("node_configlog","conflogid"),
row[0],row[1],row[2],NODE_CONFIGLOG_OP_DELETE);
}
DBfree_result(result);
/* Commit */
return SUCCEED;
}
/******************************************************************************
* *
* Function: main_nodewatcher_loop *
* *
* Purpose: periodically calculates checks sum of config data *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexei Vladishev *
* *
* Comments: never returns *
* *
******************************************************************************/
int main_nodewatcher_loop()
{
// zabbix_log( LOG_LEVEL_WARNING, "In main_nodeupdater_loop()");
for(;;)
{
zbx_setproctitle("connecting to the database");
// zabbix_log( LOG_LEVEL_WARNING, "Starting sync with nodes");
DBconnect();
calculate_checksums();
compare_checksums();
update_checksums();
/* Send configuration changes to required nodes */
main_nodesender();
/* Send new events to master node */
main_eventsender();
DBclose();
zbx_setproctitle("sender [sleeping for %d seconds]", 30);
sleep(30);
}
}
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