nagios图形界面还是比较麻烦的，下面以mysql为例来说一下。监控mysql的插件比较多，在这里了解方法，而不是死搬硬套。
一,安装pnp4nagios
请参考：nagios pnp4nagios 安装 配置
二，安装perl mysql扩展
# yum install perl-class-dbi-mysql
三，check_mysqld.php和check_mysqld.pl
1,下载
http://exchange.nagios.org/components/com_mtree/attachment.php?link_id=174&cf_id=30http://exchange.nagios.org/components/com_mtree/attachment.php?link_id=174&cf_id=36
2,修改check_mysqld.php和check_mysqld.pl，本机是64位，根本没有/usr/lib/nagios，所以要把文件中的lib改成lib64
3,copy和修改文件权限
# cp check_mysqld.pl /usr/lib64/nagios/plugins# chmod 755 /usr/lib64/nagios/plugins/check_mysqld.pl# chgrp nagios /usr/lib64/nagios/plugins/check_mysqld.pl# cp check_mysqld.php /usr/share/nagios/html/pnp4nagios/templates.dist
四，nagios配置
1,修改command.cfg
# vim /etc/nagios/objects/commands.cfgdefine command{ command_name check_mysqld command_line $user1$/check_mysqld.pl -h $hostaddress$ -u nagios -p $user7$ -a uptime,threads_connected,questions,slow_queries,open_tables -w ',,,,' -c ',,,,' -a $user21$}
2,修改resource.cfg
# vim /etc/nagios/private/resource.cfg $user7$=nagios$user21$='com_select,com_update,com_insert,com_insert_select,com_commit,com_delete,com_rollback,aborted_clients,aborted_connects,binlog_cache_disk_use,binlog_cache_use,bytes_received,bytes_sent,connections,created_tmp_disk_tables,created_tmp_files,created_tmp_tables,delayed_errors,delayed_insert_threads,delayed_writes,handler_update,handler_write,handler_delete,handler_read_first,handler_read_key,handler_read_next,handler_read_prev,handler_read_rnd,handler_read_rnd_next,key_blocks_not_flushed,key_blocks_unused,key_blocks_used,key_read_requests,key_reads,key_write_requests,key_writes,max_used_connections,not_flushed_delayed_rows,open_files,open_streams,open_tables,opened_tables,prepared_stmt_count,qcache_free_blocks,qcache_free_memory,qcache_hits,qcache_inserts,qcache_lowmem_prunes,qcache_not_cached,qcache_queries_in_cache,qcache_total_blocks,questions,select_full_join,select_rangle_check,slow_launch_threads,slow_queries,table_locks_immediate,table_locks_waited,threads_cached,threads_connected,threads_created,threads_running'
在这里要注意，$user21$后面的内容要在一行。
3,修改localhost.cfg
# vim /etc/nagios/objects/localhost.cfg define service { use local-service,srv-pnp //srv-pnp换成你自定义的 host_name localhost service_description mysqld check_command check_mysqld!localhost!nagios!nagios}
4,pnp4nagios中增加check_mysqld.cfg
# vim /etc/pnp4nagios/check_commands/check_mysqld.cfgdatatype = counter
五，重启nagios
# /etc/init.d/npcd restart# /etc/init.d/nrpe restart# /etc/init.d/nagios restart
六,查看结果
nagios mysql
上图可以看出，nagios配置图形监控mysql，已ok了，如果没有数据-nan的话，不要急，等一会就有数据了。
原文地址：nagios pnp4nagios 图形监控 mysql, 感谢原作者分享。