Nagios CCM not accessible after changing mysql datadir

[rajasegar]

Nagios XI Enterprise: 5.7.3
RHEL 7.3

Tried changing the data directory from /var/lib/mysql to another mount point.
Mariadb starts up fine and can log in into XI.

However the CCM screens is blank. There is no error message anywhere.
Please advice where to check and if I missed out any steps. Monitoring engine Process state was red.

I have reverted back now and it is working fine again.

[dchurch]

(From your previous posts I'm assuming you're using RHEL.)

If you just edited the datadir and socket keys in /etc/my.cnf, it'll break your configuration. Unless you edit a third file, PHP won't know how to connect to the database thru the socket.

You have to also edit /etc/my.cnf.d/client.cnf to add a socket= line under [client]. E.g.:

Code: Select all

[client]
socket=/path/to/new/datadir/mysql.sock

You can test this on the command line:

Code: Select all

$ mysql -unagiosql -pn@gweb -e 'select count(*) from information_schema.tables'

[rajasegar]

(From your previous posts I'm assuming you're using RHEL.)

If you just edited the datadir and socket keys in /etc/my.cnf, it'll break your configuration. Unless you edit a third file, PHP won't know how to connect to the database thru the socket.

You have to also edit /etc/my.cnf.d/client.cnf to add a socket= line under [client]. E.g.:

Code: Select all

[client]
socket=/path/to/new/datadir/mysql.sock

You can test this on the command line:

Code: Select all

$ mysql -unagiosql -pn@gweb -e 'select count(*) from information_schema.tables'

Thanks. Will try this out.

[rajasegar]

(From your previous posts I'm assuming you're using RHEL.)

If you just edited the datadir and socket keys in /etc/my.cnf, it'll break your configuration. Unless you edit a third file, PHP won't know how to connect to the database thru the socket.

You have to also edit /etc/my.cnf.d/client.cnf to add a socket= line under [client]. E.g.:

Code: Select all

[client]
socket=/path/to/new/datadir/mysql.sock

You can test this on the command line:

Code: Select all

$ mysql -unagiosql -pn@gweb -e 'select count(*) from information_schema.tables'

Same problem. RHEL 7.3. SELinux not running. MariaDB
All the checks is fine, just CCM is blank and monitoring engine process state is red.

[ssax]

Double-check that your user/password is proper in your /usr/local/nagiosxi/html/config.inc.php for the nagiosql table, that's where the CCM data lives.

You can test with this command with those credentials:

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mysql -h 127.0.0.1 -unagiosql -p'n@gweb' nagiosql -e "select * from tbl_host limit 1;"

If you run this command as root and leave it running:

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tail -Fn0 /var/log/httpd/error_log /var/log/httpd/ssl_error_log

Then go back to the CCM to replicate the issue, do you see anything in the output from the still running tail command above? If so, please send it to us.

What process did you take to do it? Did you stop mariadb, move the data, change /etc/my.cnf, and start the service? Attach your /etc/my.cnf and the output from this command:

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ls -la /path/to/your/new/data/dir

Additionally, since you changed that location you'll need to update the /usr/local/nagiosxi/scripts/repairmysql.sh and change these lines to match what you're using so the repair_databases.sh script works properly:

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rm -f /var/lib/mysql/mysql.sock

dest="/var/lib/mysql/$db"

EDIT: PM me a copy of your profile as well.

[rajasegar]

Sorry for the delay. I had to recreate a new env in Dev to test this. Same issue.
/var/log/httpd/error_log is showing it is using the old data dir. See below.

profile.zip

/var/lib/mysql has been renamed to /var/lib/mysql.bak

my.cnf & my.cnf.d/client.cnf

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[nagios@myucburhel74 ~]$ cat /etc/my.cnf
[mysqld]
query_cache_size=16M
query_cache_limit=4M
tmp_table_size=64M
max_heap_table_size=64M
key_buffer_size=32M
table_open_cache=32
innodb_file_per_table=1

datadir=/nagiosdb/mysql
socket=/nagiosdb/mysql/mysql.sock
#datadir=/var/lib/mysql
#socket=/var/lib/mysql/mysql.sock

[client]
port=3306
socket=/nagiosdb/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
#symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid

#
# include all files from the config directory
#
!includedir /etc/my.cnf.d

[nagios@myucburhel74 ~]$ cat /etc/my.cnf.d/client.cnf
#
# These two groups are read by the client library
# Use it for options that affect all clients, but not the server
#


[client]
socket=/nagiosdb/mysql/mysql.sock



# This group is not read by mysql client library,
# If you use the same .cnf file for MySQL and MariaDB,
# use it for MariaDB-only client options
[client-mariadb]

[nagios@myucburhel74 ~]$

The SQL test requested. It works fine

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 mysql -h 127.0.0.1 -unagiosql -p'n@gweb' nagiosql -e "select * from tbl_host limit 1;"
+----+-----------+-----------+--------------+-----------+---------+--------------------+------------+-----------------------+---------------+--------------+-------------------------+---------------+--------------------+----------------+----------------+-----------------------+------------------------+--------------+------------------+-----------------+---------------------+---------------+-----------------------+--------------------+---------------------+------------------------+------------------------+-------------------+---------------------------+------------------------------+----------+---------------------+----------------+---------------------------+-----------------------+---------------------+--------------------------+----------------------+-----------------------+------------------+-------+-----------+------------+------------+----------------+------------+-----------------+-----------+-----------+---------------+------+--------+---------------------+---------------+-----------+
| id | host_name | alias     | display_name | address   | parents | parents_tploptions | hostgroups | hostgroups_tploptions | check_command | use_template | use_template_tploptions | initial_state | max_check_attempts | check_interval | retry_interval | active_checks_enabled | passive_checks_enabled | check_period | obsess_over_host | check_freshness | freshness_threshold | event_handler | event_handler_enabled | low_flap_threshold | high_flap_threshold | flap_detection_enabled | flap_detection_options | process_perf_data | retain_status_information | retain_nonstatus_information | contacts | contacts_tploptions | contact_groups | contact_groups_tploptions | notification_interval | notification_period | first_notification_delay | notification_options | notifications_enabled | stalking_options | notes | notes_url | action_url | icon_image | icon_image_alt | vrml_image | statusmap_image | 2d_coords | 3d_coords | use_variables | name | active | last_modified       | access_rights | config_id |
+----+-----------+-----------+--------------+-----------+---------+--------------------+------------+-----------------------+---------------+--------------+-------------------------+---------------+--------------------+----------------+----------------+-----------------------+------------------------+--------------+------------------+-----------------+---------------------+---------------+-----------------------+--------------------+---------------------+------------------------+------------------------+-------------------+---------------------------+------------------------------+----------+---------------------+----------------+---------------------------+-----------------------+---------------------+--------------------------+----------------------+-----------------------+------------------+-------+-----------+------------+------------+----------------+------------+-----------------+-----------+-----------+---------------+------+--------+---------------------+---------------+-----------+
|  1 | localhost | localhost |              | 127.0.0.1 |       0 |                  2 |          0 |                     2 | NULL          |            1 |                       2 |               |               NULL |           NULL |           NULL |                     2 |                      2 |            0 |                2 |               2 |                NULL |             0 |                     2 |               NULL |                NULL |                      2 |                        |                 2 |                         2 |                            2 |        0 |                   2 |              0 |                         2 |                  NULL |                   0 |                     NULL |                      |                     2 |                  |       |           |            |            |                |            |                 |           |           |             0 |      | 1      | 2020-04-17 20:07:33 | NULL          |         1 |
+----+-----------+-----------+--------------+-----------+---------+--------------------+------------+-----------------------+---------------+--------------+-------------------------+---------------+--------------------+----------------+----------------+-----------------------+------------------------+--------------+------------------+-----------------+---------------------+---------------+-----------------------+--------------------+---------------------+------------------------+------------------------+-------------------+---------------------------+------------------------------+----------+---------------------+----------------+---------------------------+-----------------------+---------------------+--------------------------+----------------------+-----------------------+------------------+-------+-----------+------------+------------+----------------+------------+-----------------+-----------+-----------+---------------+------+--------+---------------------+---------------+-----------+
[nagios@myucburhel74 my.cnf.d]$

Datadir listing

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[nagios@myucburhel74 ~]$ ls -la /nagiosdb/mysql
total 28744
drwxr-xr-x 8 mysql mysql     4096 Nov 18 18:26 .
drwxr-xr-x 3 root  root      4096 Nov 18 17:54 ..
-rw-rw---- 1 mysql mysql    16384 Nov 18 18:08 aria_log.00000001
-rw-rw---- 1 mysql mysql       52 Nov 18 18:08 aria_log_control
-rw-rw---- 1 mysql mysql 18874368 Nov 18 18:42 ibdata1
-rw-rw---- 1 mysql mysql  5242880 Nov 18 18:42 ib_logfile0
-rw-rw---- 1 mysql mysql  5242880 Nov 18 18:30 ib_logfile1
drwx------ 2 mysql mysql     4096 Apr 17  2020 mysql
srwxrwxrwx 1 mysql mysql        0 Nov 18 18:26 mysql.sock
drwx------ 2 mysql mysql    12288 Nov 18 18:30 nagios
drwx------ 2 mysql mysql    16384 Nov 18 18:30 nagiosql
drwx------ 2 mysql mysql     4096 Nov 18 18:30 nagiosxi
drwx------ 2 mysql mysql     4096 Apr 17  2020 performance_schema
drwx------ 2 mysql mysql     4096 Apr 17  2020 test

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[nagios@myucburhel74 my.cnf.d]$ mysql -unagiosql -pn@gweb -e 'select count(*) from information_schema.tables'
+----------+
| count(*) |
+----------+
|      157 |
+----------+
[nagios@myucburhel74 my.cnf.d]$

This works in all my other instances but not in the moved data dir
[nagios@myucburhel74 ~]$ mysql --user=root --password=nagiosxi --host=localhost
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

tail -Fn0 /var/log/httpd/error_log /var/log/httpd/ssl_error_log

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[nagios@myucburhel74 ~]$ tail -Fn0 /var/log/httpd/error_log /var/log/httpd/ssl_error_log
==> /var/log/httpd/error_log <==

==> /var/log/httpd/ssl_error_log <==

==> /var/log/httpd/error_log <==
[Wed Nov 18 18:40:12.399219 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::mysqli(): (HY000/2002): Can't connect to local MySQL server through socket '[b]/var/lib/mysql/mysql.sock[/b]' (2) in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 82, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.399295 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::set_charset(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 86, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.406213 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::query(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 87, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.406256 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.406282 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.406299 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.406319 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.407635 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.407671 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.408540 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  mysqli::query(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 103, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.408569 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Warning:  DB::query(): Property access is not allowed yet in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 105, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.408579 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Notice:  Trying to get property of non-object in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 116, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Wed Nov 18 18:40:12.408586 2020] [:error] [pid 9039] [client 10.17.44.253:51046] PHP Fatal error:  Call to a member function free() on a non-object in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 121, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php

Please advice how to fix this issue. Only CCM is blank.

[ssax]

This looks like the issue as you saw:

Code: Select all

[Wed Nov 18 18:32:48.107145 2020] [:error] [pid 9098] [client X.X.X.X:50883] PHP Warning:  mysqli::mysqli(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 82, referer: http://X.X.X.X/nagiosxi/includes/components/ccm/xi-index.php

Your conf files look proper, I had to add the socket under the /etc/my.cnf.d/client.cfg [client] section to get mine working but I had to restart some services after. Please run these commands and see if it works:

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systemctl restart mariadb
systemctl restart httpd
systemctl restart ndo2db

[rajasegar]

This looks like the issue as you saw:

Code: Select all

[Wed Nov 18 18:32:48.107145 2020] [:error] [pid 9098] [client X.X.X.X:50883] PHP Warning:  mysqli::mysqli(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 82, referer: http://X.X.X.X/nagiosxi/includes/components/ccm/xi-index.php

Your conf files look proper, I had to add the socket under the /etc/my.cnf.d/client.cfg [client] section to get mine working but I had to restart some services after. Please run these commands and see if it works:

Code: Select all

systemctl restart mariadb
systemctl restart httpd
systemctl restart ndo2db

Same problem. I even rebooted the machine.
Why is Nagios XI going to the old sqldb directory when it has been changed?

[ssax]

Ah, there is a hidden setting that's not in there by default:

Please add this to your /usr/local/nagios/etc/ndo2db.cfg:

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db_socket=/nagiosdb/mysql/mysql.sock

Then restart the services:

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systemctl restart ndo2db
systemctl restart nagios

[rajasegar]

Ah, there is a hidden setting that's not in there by default:

Please add this to your /usr/local/nagios/etc/ndo2db.cfg:

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db_socket=/nagiosdb/mysql/mysql.sock

Then restart the services:

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systemctl restart ndo2db
systemctl restart nagios

Same problem

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[nagios@myucburhel74 debug]$ tail -Fn0 /var/log/httpd/error_log /var/log/httpd/ssl_error_log
==> /var/log/httpd/error_log <==

==> /var/log/httpd/ssl_error_log <==

==> /var/log/httpd/error_log <==
[Fri Nov 20 11:14:13.554956 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::mysqli(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 82, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.555128 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::set_charset(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 86, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.555178 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::query(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 87, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.555233 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.555304 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.555350 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.555378 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.558076 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.558219 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::real_escape_string(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 362, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.560209 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  mysqli::query(): Couldn't fetch mysqli in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 103, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.560306 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Warning:  DB::query(): Property access is not allowed yet in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 105, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.560327 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Notice:  Trying to get property of non-object in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 116, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php
[Fri Nov 20 11:14:13.560345 2020] [:error] [pid 2173] [client 10.17.44.253:56816] PHP Fatal error:  Call to a member function free() on a non-object in /usr/local/nagiosxi/html/includes/components/ccm/classes/db.class.php on line 121, referer: http://10.104.28.124/nagiosxi/includes/components/ccm/xi-index.php

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[nagios@myucburhel74 debug]$ cat /usr/local/nagios/etc/ndo2db.cfg
#####################################################################
# NDO2DB DAEMON CONFIG FILE
#####################################################################


lock_file=/usr/local/nagios/var/ndo2db.lock

ndo2db_user=nagios
ndo2db_group=nagios

socket_type=unix

socket_name=/usr/local/nagios/var/ndo.sock

tcp_port=5668


db_servertype=mysql
db_host=localhost
db_port=3306
db_socket=/nagiosdb/mysql/mysql.sock

db_name=nagios
db_prefix=nagios_

db_user=ndoutils
db_pass=n@gweb



## TABLE TRIMMING OPTIONS
# Several database tables containing Nagios event data can become quite large
# over time.  Most admins will want to trim these tables and keep only a
# certain amount of data in them.  The options below are used to specify the
# age (in MINUTES) that data should be allowd to remain in various tables
# before it is deleted.  Using a value of zero (0) for any value means that
# that particular table should NOT be automatically trimmed.

# Keep timed events for 24 hours
max_timedevents_age=1440

# Keep system commands for 1 week
max_systemcommands_age=10080

# Keep service checks for 1 week
max_servicechecks_age=10080

# Keep host checks for 1 week
max_hostchecks_age=10080

# Keep event handlers for 31 days
max_eventhandlers_age=44640





# DEBUG LEVEL
# This option determines how much (if any) debugging information will
# be written to the debug file.  OR values together to log multiple
# types of information.
# Values: -1 = Everything
#          0 = Nothing
#          1 = Process info
#          2 = SQL queries

debug_level=0



# DEBUG VERBOSITY
# This option determines how verbose the debug log out will be.
# Values: 0 = Brief output
#         1 = More detailed
#         2 = Very detailed

debug_verbosity=1



# DEBUG FILE
# This option determines where the daemon should write debugging information.

debug_file=/usr/local/nagios/var/ndo2db.debug



# MAX DEBUG FILE SIZE
# This option determines the maximum size (in bytes) of the debug file.  If
# the file grows larger than this size, it will be renamed with a .old
# extension.  If a file already exists with a .old extension it will
# automatically be deleted.  This helps ensure your disk space usage doesn't
# get out of control when debugging.

max_debug_file_size=1000000