For Nagios server installation:
After the nagios server installation we will install the percona plugin on the nagios server.
Nagios Server
# cd /tmp
# wget https://www.percona.com/downloads/percona-monitoring-plugins/1.1.5/percona-monitoring-plugins-1.1.5.tar.gz
# tar xzf percona-monitoring-plugins-1.1.5.tar.gz
# cd percona-monitoring-plugins-1.1.5/nagios/bin/
# cp * /usr/local/nagios/libexec/
Create the file for the database monitoring
# vi /usr/local/nagios/etc/objects/mysql.cfg
# Define a host for the local machine
define host{
use linux-server
host_name testDB
alias db
address IP_Address
}
# Define an optional hostgroup for Linux machines
define hostgroup{
hostgroup_name mysql-servers ; The name of the hostgroup
alias mysql-server ; Long name of the group
members testDB ; Comma separated list of hosts that belong to this group
}
define hostgroup{
hostgroup_name mysql-masters
alias MySQL Servers
members testDB
}
define hostgroup{
hostgroup_name mysql-slaves
alias MySQL Servers
members testDB
}
# SERVICE DEFINITIONS
define service {
use local-service
host_name testDB
service_description Check MySQL Database
check_command check_mysql
}
define service{
use local-service
hostgroup_name mysql-servers
service_description Free Memory
check_command check_nrpe!rdba_unix_memory
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL PID
check_command check_nrpe!rdba_mysql_pidfile
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL Processlist
check_command check_mysql_processlist!states_count!16!32
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL Connections
check_command check_mysql_connections
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL Active Threads
check_command check_mysql_active_threads!40!400
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL InnoDB Idle Blocker
check_command check_mysql_innodb!idle_blocker_duration!60!600
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL InnoDB Long Transaction
check_command check_mysql_innodb!max_duration!86400!172800
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL InnoDB Lock Waits
check_command check_mysql_innodb!waiter_count!10!25
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL Replication Running
check_command check_mysql_replication_running
}
define service{
use local-service
hostgroup_name mysql-servers
service_description MySQL Replication Delay
check_command check_mysql_replication_delay!300!600
}
After this, add the below commands of percona in the commands.cfg
# vi /usr/local/nagios/etc/objects/commands.cfg
define command {
command_name check_mysql
command_line $USER1$/check_mysql -H $HOSTADDRESS$
}
define command{
command_name check_mysql_connections
command_line $USER1$/pmp-check-mysql-status -H $HOSTADDRESS$ -x Threads_connected -o / -y max_connections -T pct -w 80 -c 95
}
define command{
command_name check_mysql_active_threads
command_line $USER1$/pmp-check-mysql-status -H $HOSTADDRESS$ -x Threads_running -w $ARG1$ -c $ARG2$
}
define command{
command_name check_mysql_processlist
command_line $USER1$/pmp-check-mysql-processlist -H $HOSTADDRESS$ -C $ARG1$ -w $ARG2$ -c $ARG3$
}
define command {
command_name check_mysql_innodb
command_line $USER1$/pmp-check-mysql-innodb -H $HOSTADDRESS$ -C $ARG1$ -w $ARG2$ -c $ARG3$
}
define command{
command_name check_mysql_replication_delay
command_line $USER1$/pmp-check-mysql-replication-delay -H $HOSTADDRESS$ -w $ARG1$ -c $ARG2$
}
define command{
command_name check_mysql_replication_running
command_line $USER1$/pmp-check-mysql-replication-running -H $HOSTADDRESS$
}
define command{
command_name check_mysql_deadlocks
command_line $USER1$/pmp-check-mysql-deadlocks -H $HOSTADDRESS$ -i 5 -w 12 -c 60
}
define command{
command_name check_mysql_table_checksum
command_line $USER1$/pmp-check-pt-table-checksum -H $HOSTADDRESS$
}
# vi /usr/local/etc/nagios/nagios.cfg
Add this line in the Linux Host section
cfg_file=/usr/local/nagios/etc/objects/mysql.cfg
# service nagios restart
Nagios Client
For Nagios client installation follow the below post
# cd /tmp
# wget https://www.percona.com/downloads/percona-monitoring-plugins/1.1.5/percona-monitoring-plugins-1.1.5.tar.gz
# tar xzf percona-monitoring-plugins-1.1.5.tar.gz
# cd percona-monitoring-plugins-1.1.5/nagios/bin
# cp * /usr/local/nagios/libexec/
Open the nrpe.cfg file and paste the percona commands
# vi /usr/local/nagios/etc/nrpe.cfg
command[rdba_mysql_pidfile]=/usr/local/nagios/libexec/pmp-check-mysql-pidfile
command[check_mysql_deadlocks]=/usr/local/nagios/libexec/pmp-check-mysql-deadlocks -i 5 -w 12 -c 60
command[check_mysql_replication_running]=/usr/local/nagios/libexec/pmp-check-mysql-replication-running
#command[check_mysql_service]=/usr/local/nagios/libexec/check_mysqld.pl -u root -p xx -a slow_queries -w 44 -c 55
command[check_mysql]=/usr/local/nagios/libexec/check_mysql
command[check_mysql_innodb]=/usr/local/nagios/libexec/pmp-check-mysql-innodb -C idle_blocker_duration -w 60 -c 600
command[check_mysql_innodb]=/usr/local/nagios/libexec/pmp-check-mysql-innodb -C max_duration -w 86400 -c 172800
command[check_mysql_active_threads]=/usr/local/nagios/libexec/pmp-check-mysql-status -x Threads_running -w 20 -c 40
command[rdba_unix_memory]=/usr/local/nagios/libexec/pmp-check-unix-memory -d -w 90 -c 95
command[check_mysql_deadlocks]=/usr/local/nagios/libexec/pmp-check-mysql-deadlocks -i 5 -w 12 -c 60
command[check_mysql_connections]=/usr/local/nagios/libexec/pmp-check-mysql-status -x Threads_connected -o / -y max_connections -T pct -w 80 -c 95
command[check_mysql_replication_delay]=/usr/local/nagios/libexec/pmp-check-mysql-replication-delay -w 650 -c 600
command[check_mysql_processlist]=/usr/local/nagios/libexec/pmp-check-mysql-processlist -w 80 -c 100
# service xinetd restart
Go to the Nagios URL: IP_Address/nagios, you'll see your DB Host with percona plugins services
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| testDB |
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