1 /*
2 ** Zabbix
3 ** Copyright (C) 2001-2021 Zabbix SIA
4 **
5 ** This program is free software; you can redistribute it and/or modify
6 ** it under the terms of the GNU General Public License as published by
7 ** the Free Software Foundation; either version 2 of the License, or
8 ** (at your option) any later version.
9 **
10 ** This program is distributed in the hope that it will be useful,
11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ** GNU General Public License for more details.
14 **
15 ** You should have received a copy of the GNU General Public License
16 ** along with this program; if not, write to the Free Software
17 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 **/
19
20 #include "common.h"
21
22 #include "db.h"
23 #include "daemon.h"
24 #include "zbxself.h"
25 #include "log.h"
26 #include "dbconfig.h"
27 #include "dbcache.h"
28
29 extern int CONFIG_CONFSYNCER_FREQUENCY;
30 extern unsigned char process_type, program_type;
31 extern int server_num, process_num;
32
zbx_dbconfig_sigusr_handler(int flags)33 static void zbx_dbconfig_sigusr_handler(int flags)
34 {
35 if (ZBX_RTC_CONFIG_CACHE_RELOAD == ZBX_RTC_GET_MSG(flags))
36 {
37 if (0 < zbx_sleep_get_remainder())
38 {
39 zabbix_log(LOG_LEVEL_WARNING, "forced reloading of the configuration cache");
40 zbx_wakeup();
41 }
42 else
43 zabbix_log(LOG_LEVEL_WARNING, "configuration cache reloading is already in progress");
44 }
45 }
46
47 /******************************************************************************
48 * *
49 * Function: main_dbconfig_loop *
50 * *
51 * Purpose: periodically synchronises database data with memory cache *
52 * *
53 * Parameters: *
54 * *
55 * Return value: *
56 * *
57 * Author: Alexander Vladishev *
58 * *
59 * Comments: never returns *
60 * *
61 ******************************************************************************/
ZBX_THREAD_ENTRY(dbconfig_thread,args)62 ZBX_THREAD_ENTRY(dbconfig_thread, args)
63 {
64 double sec = 0.0;
65
66 process_type = ((zbx_thread_args_t *)args)->process_type;
67 server_num = ((zbx_thread_args_t *)args)->server_num;
68 process_num = ((zbx_thread_args_t *)args)->process_num;
69
70 zabbix_log(LOG_LEVEL_INFORMATION, "%s #%d started [%s #%d]", get_program_type_string(program_type),
71 server_num, get_process_type_string(process_type), process_num);
72
73 update_selfmon_counter(ZBX_PROCESS_STATE_BUSY);
74
75 zbx_set_sigusr_handler(zbx_dbconfig_sigusr_handler);
76
77 zbx_setproctitle("%s [connecting to the database]", get_process_type_string(process_type));
78
79 DBconnect(ZBX_DB_CONNECT_NORMAL);
80
81 sec = zbx_time();
82 zbx_setproctitle("%s [syncing configuration]", get_process_type_string(process_type));
83 DCsync_configuration(ZBX_DBSYNC_INIT);
84 zbx_setproctitle("%s [synced configuration in " ZBX_FS_DBL " sec, idle %d sec]",
85 get_process_type_string(process_type), (sec = zbx_time() - sec), CONFIG_CONFSYNCER_FREQUENCY);
86 zbx_sleep_loop(CONFIG_CONFSYNCER_FREQUENCY);
87
88 while (ZBX_IS_RUNNING())
89 {
90 zbx_setproctitle("%s [synced configuration in " ZBX_FS_DBL " sec, syncing configuration]",
91 get_process_type_string(process_type), sec);
92
93 sec = zbx_time();
94 zbx_update_env(sec);
95
96 DCsync_configuration(ZBX_DBSYNC_UPDATE);
97 DCupdate_hosts_availability();
98 sec = zbx_time() - sec;
99
100 zbx_setproctitle("%s [synced configuration in " ZBX_FS_DBL " sec, idle %d sec]",
101 get_process_type_string(process_type), sec, CONFIG_CONFSYNCER_FREQUENCY);
102
103 zbx_sleep_loop(CONFIG_CONFSYNCER_FREQUENCY);
104 }
105
106 zbx_setproctitle("%s #%d [terminated]", get_process_type_string(process_type), process_num);
107
108 while (1)
109 zbx_sleep(SEC_PER_MIN);
110 }
111