Nagios监控数据库

一、check_mysql_health监控数据库

1、check_mysql_health安装

在监控服务器上安装

# cd /usr/local/src/tarbag

# wget http://labs.consol.de/wp-content/uploads/2010/03/check_mysql_health-2.1.1.tar.gz

# tar zxvf check_mysql_health-2.1.1.tar.gz -C ../software/

# ./configure /

--prefix=/usr/local/nagios/ /

--with-nagios-user=nagios /

--with-nagios-group=nagios /

--with-perl=/usr/bin/perl /

--with-statefiles-dir=/usr/local/nagios/var/tmp /

--with-perl perl/ 程序运行路径

--with-statefiles-dir 状态信息文件路径

# make

# make install

2、check_mysql_health选项

Options:

--hostname

the database server's hostname

--port

the database's port. (default: 3306)

--socket

the database's unix socket.

--username

the mysql db user

--password

the mysql db user's password

--database

the database's name. (default: information_schema)

--warning

the warning range

--critical

the critical range

--mode

the mode of the plugin. select one of the following keywords:

connection-time 连接到服务器上的时间

uptime 服务器运行的时间

threads-connected 当前连接到数据库的连接数

threadcache-hitrate 线程缓存命中率

slave-lag slave落后master多少时间

slave-io-running slave复制是否正常

slave-sql-running slave复制是否正常

qcache-hitrate 查询缓存命中率

qcache-lowmem-prunes (Query cache entries pruned because of low memory)

keycache-hitrate (MyISAM key cache hitrate)

bufferpool-hitrate (InnoDB buffer pool hitrate)

bufferpool-wait-free (InnoDB buffer pool waits for clean page available)

log-waits (InnoDB log waits because of a too small log buffer)

tablecache-hitrate 表缓存命中率

table-lock-contention 表锁率

index-usage 索引使用情况

tmp-disk-tables (Percent of temp tables created on disk)

slow-queries 慢查询

long-running-procs 长时间运行的进程

cluster-ndbd-running ndb节点运行状况

sql 返回一个数字的任何SQL语句

3、check_mysql_health监控配置

监控服务器：10.59.97.42

MySQL数据授权：

在要监控的MySQL数据库服务器上

mysql> grant usage on *.* to [email protected] identified by "honyho@8123";

mysql> flush privileges;

在监控服务器上

1》查看当前连接到数据库的连接数

#./check_mysql_health --hostname 10.59.97.57 --username honyho --password honyho@8123 --mode threads-connected

OK - 3 client connection threads | threads_connected=3;10;20

threads_connected=3;10;20

3表示连接数

10 表示warning阀值（默认）

20 表示critical阀值（默认）

Nagios相关配置

1》配置commands.cfg文件

define command{

command_name check_mysql_health

command_line $USER1$/check_mysql_health --hostname $ARG1$ --username $ARG2$ --password $ARG3$ --warning $ARG4$ --critical $ARG5$ --mode $ARG6$

}

2》配置121_207_231_17.cfg文件

define service{

use local-service

host_name 121.207.231.17

service_description threads-connected

check_command check_mysql_health!10.59.97.57!honyho!honyho@8123!1000!1500!threads-connected

}

-----------------------------------------------------------

二、nagios-mysql-plugins插件监控数据库

一、安装此插件

#wget 北北没有给地址

#tar zxvf nagios-mysql-plugins-0.3.tar.gz -C ../software/

#cd nagios-mysql-plugins-0.3

#chmod +x *mysql*

二、插件内容

check_db_mysql.pl 检测mysql是否运行

check_errorlog_mysql.pl 检测mysql数据库错误日志

check_repl_mysql_cnt_slave_hosts.pl 统计连接到从主机数

check_repl_mysql_heartbeat.pl 检测心跳 (安装完默认名字是check_repl_mysql_hearbeat.pl)

check_repl_mysql_io_thread.pl 检测IO线程

check_repl_mysql_read_exec_pos.pl

check_repl_mysql_readonly.pl 检测从是否设置为只读

check_repl_mysql_seconds_behind_master.pl检测从多少时间与主同步

check_repl_mysql_sql_thread.pl 检测SQL线程

perf_mysql.pl 收集性能数据

perf_mysql.pl -m

connections,

thread_cache,

network_traffic,

queries,query_cache,

myisam_key_buffer,

table_cache,

temporary_tables,

tables,

slow_queries,

bin_log,uptime,

innodb_buffer_pool,

innodb_buffer_pool_io,

innodb_io,innodb_data,

innodb_logfile,

innodb_row_locking,

innodb_queries